- Organic reactions in ionic liquids: Ionic liquid-accelerated cyclocondensation of α-tosyloxyketones with 2-aminopyridine
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The room temperature ionic liquid n-butylpyridinium tetrafluoroborate (BPyBF4) is used as a 'green' recyclable alternative to classical molecular solvents for the cyclocondensation of α-tosyloxyketones with 2-aminopyridine. Significant rate enh
- Xie, Yuan-Yuan,Chen, Zhen-Chu,Zheng, Qin-Guo
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Read Online
- Modified one-pot multicomponent diastereoselective synthesis of trans-2,3-Dihydrofuro[3,2-c]coumarins via in situ-generated α- tosyloxyketones
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A modified protocol for diastereoselective synthesis of differently substituted trans-2,3-dihydrofuro[3,2-c]coumarins is developed via, a one-pot multicomoponent reaction starting from aromatic aldehydes, 4-hydroxycoumarin, and α-tosyloxyacetophenones wit
- Kumar, Ravi,Wadhwa, Deepak,Hussain, Khalid,Prakash, Om
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Read Online
- Synthesis method of alpha-carbonyl sulfonate and catalyst used in synthesis method
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The invention provides a nitrogen and carbon co-doped Nb2O5 catalyst for synthesizing alpha carbonyl sulfonate, a preparation method of the nitrogen and carbon co-doped Nb2O5 catalyst, and a synthesizing method of the alpha carbonyl sulfonate by using the catalyst under the driving of visible light. Based on the total weight of the catalyst, the content of nitrogen is 0.01 wt%-1wt%; the content of the carbon is 0.01 wt% to 1.5 wt%. The catalyst provided by the invention is used for preparing alpha-carbonyl sulfonate through olefin aerobic oxidation, the reaction condition is mild, oxygen is used as an oxidant, and other oxidants are not needed. All the raw materials of the catalyst are rich in resource and low in price, and the catalyst can be recycled without inactivation and is very stable to air, water and heat.
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Paragraph 0076-0086
(2021/04/17)
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- Diastereoselective Alkene Hydroesterification Enabling the Synthesis of Chiral Fused Bicyclic Lactones
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Palladium-catalysed diastereoselective hydroesterification of alkenes assisted by the coordinative hydroxyl group in the substrate afforded a variety of chiral γ-butyrolactones bearing two stereocenters. Employing the carbonylation-lactonization products as the key intermediates, the route from the alkenes with single chiral center to chiral THF-fused bicyclic γ-lactones containing three stereocenters was developed.
- Shi, Zhanglin,Shen, Chaoren,Dong, Kaiwu
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supporting information
p. 18039 - 18042
(2021/11/16)
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- Facile synthesis of polysubstituted cyclopropanes using α-tosyloxyketones
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A facile synthesis of polysubstituted cyclopropanes (5) by the treatment of pyridinium ylides, generated in situ from pyridinium toslyates (2), with arylidenemalonitrile (4) is presented. Pyridinium toslyates (2) were obtained by reacting α-tosyloxyketone
- Rana, Neena,Nain, Sonia,Kumar, Dinesh,Kumar, Ravi
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p. 505 - 507
(2018/02/09)
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- A convenient [hydroxy(tosyloxy)iodo]benzene-mediated one-pot synthesis of 2-arylimidazo[2,1-b[benzothiazoles
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Several 2-arylimidazo[2,1-b]benzothiazoles (4) have been conveniently synthesized in one-pot reactions via α-tosyloxylation of enolizable ketones (1) using [hydroxy(tosyloxy)iodo]benzene 2 in acetonitrile, followed by treatment with 2-amino-6-(substituted
- Sumran, Garima,Aggarwal, Ranjana
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p. 170 - 177
(2015/10/20)
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- Novel α-tosyloxylation of ketones catalyzed by the in situ generated hypoiodous acid from alkyl iodide
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Using a catalytic amount of 1-iodopropane, a novel and efficient procedure has been developed for direct preparation of α-tosyloxyketones from ketones. In this protocol, 1-iodopropane is first oxidized into iodosylpropane, which decomposes to form the key
- Zhang, Bijun,Han, Liuquan,Hu, Jiantao,Yan, Jie
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p. 5851 - 5854
(2015/01/16)
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- Oxidative breakdown of iodoalkanes to catalytically active iodine species: A case study in the α-tosyloxylation of ketones
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Catalysis of the oxidative processes by iodoarenes has become a promising direction in synthesis. The mechanism, involving the well-known isolable hypervalent iodine species, is generally limited to aromatic iodides, since the corresponding aliphatic spec
- Guo, Wusheng,Vallcorba, Oriol,Vallribera, Adelina,Shafir, Alexandr,Pleixats, Roser,Rius, Jordi
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p. 468 - 472
(2014/03/21)
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- Effective α-tosyloxylation of ketones using 1,1,1-trifluoro-2-iodoethane as catalyst
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With 1,1,1-trifluoro-2-iodoethane as catalyst, a novel and efficient procedure has been developed for preparation of α-tosyloxyketones from ketones. In this protocol, 1,1,1-trifluoro-2-iodoethane is first oxidized by m-chloroperbenzoic acid to a hypervale
- Zhang, Bijun,Han, Liuquan,Hu, Jiantao,Yan, Jie
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supporting information
p. 3264 - 3270
(2015/10/06)
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- Iodine-mediated α-sulfonyloxylation of alkyl aryl ketones with oxone and sulfonic acids
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Alkyl aryl ketones are converted into the corresponding α-sulfonyloxyketones, in moderate to excellent yields, via a novel procedure that utilizes Oxone, p-toluenesulfonic acid or methanesulfonic acid and molecular iodine in a mixture of aceton
- Kikui, Hiroki,Moriyama, Katsuhiko,Togo, Hideo
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p. 791 - 797
(2013/04/10)
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- Sol-gel immobilized aryl iodides for the catalytic oxidative α-tosyloxylation of ketones
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New hybrid silica materials M1-M4, derived from mono and bis-silylated aryl iodides, have been prepared via sol-gel processes, either by the hydrolytic polycondensation of a bis-silylated monomer or by the co-gelification of a monosilylated precursor with
- Guo, Wusheng,Monge-Marcet, Amàlia,Catto?n, Xavier,Shafir, Alexandr,Pleixats, Roser
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p. 192 - 199
(2013/02/25)
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- An iodobenzene-catalysed domino route toward quinoxaline derivatives from simple ketones and o-phenylenediamines in one pot
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An iodobenzene-catalysed domino route to quinoxalines from ketones and o-phenylenediamines in one pot has been developed. This transformation consisted of the generation of Koser's generation, α-tosyloxylation of ketones, nucleophilic substitution and intramolecular dehydration with o-phenylenediamines, and dehydrogenation. Website
- Li, Xiaoqing,Zhou, Can,Hu, Zhiyan,Xu, Xiangsheng
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p. 579 - 581
(2013/10/22)
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- A novel one-pot method for αα-tosyloxylation of ketones using a catalytic amount of ammonium iodide
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A novel one-pot procedure was designed for the preparation of various α-tosyloxy ketones in good yields by the reaction of ketones with m-chloroperoxybenzoic acid and p-toluenesulfonic acid monohydrate in the presence of catalytic amounts of ammonium iodi
- Hu, Jiantao,Zhu, Min,Xu, Yuan,Yan, Jie
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experimental part
p. 1226 - 1232
(2012/05/20)
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- Iodoarene-mediated α-tosyloxylation of ketones with MCPBA and p-toluenesulfonic acid
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Alkyl aryl ketones and dialkyl ketones could be converted into the corresponding α-tosyloxy ketones by the reaction with MCPBA and p-toluenesulfonic acid monohydrate (PTSA ? H2O) in the presence of a catalytic amount of molecular iodine (I
- Tanaka, Ayumi,Moriyama, Katsuhiko,Togo, Hideo
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experimental part
p. 1853 - 1858
(2011/09/16)
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- Catalytic, asymmetric, interrupted Feist-Benary reactions of α-tosyloxyacetophenones
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A new variant of the Interrupted Feist-Benary (IFB) reaction uses α-tosyloxyacetophenones as electrophiles and proceeds in good yields and excellent enantioselectivities.
- Calter, Michael A.,Korotkov, Alexander
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supporting information; experimental part
p. 6328 - 6330
(2012/01/11)
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- Novel preparation of polymer-supported iodobenzene and its synthetic utility as a recyclable reagent with m-chloroperbenzoic acid
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Three novel polymer-supported iodobenzene compounds A0, A 6, and A10 were prepared from the reaction of commercially available cross-linked poly(p-chloromethyl)styrene with m-iodobenzylalcohol, 6-(m-iodobenzyloxy)-1-hexanol, and 10-(m-iodobenzyloxy)-1-decanol. Their catalytic reactivity and reusability for the oxidative α-tosyloxylation of ketones and the cyclization of N-methoxy-2-arylethanesulfonamides in the presence of m-chloroperbenzoic acid (mCPBA) were confirmed to provide -tosyloxyketones and N-methoxy-3,4-dihydro-2,1-benzothiazine-2,2-dioxides, respectively, in good yields. Georg Thieme Verlag Stuttgart · New York.
- Suzuki, Yuhsuku,Togo, Hideo
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experimental part
p. 2355 - 2360
(2010/09/18)
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- Iodobenzene-catalyzed synthesis of α-azidoketones and α-thiocyanatoketones from aryl ketones with MCPBA as a cooxidant
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Iodobenzene-catalyzed synthesis of α-azidoketones and α-thiocyanatoketones from aryl ketones with MCPBA as a cooxidant is described. The method is simple, rapid and practical, generating α-azidoketones and α-thiocyanatoketones from the aryl ketone without
- Chang, Ya-Li,Chung, Chi-Lin,Wu, Fang-Wen,Wang, Huey-Min,Hou, Rei-Sheu,Kang, Iou-Jiun,Chen, Ling-Ching
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experimental part
p. 149 - 152
(2011/04/16)
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- Iodobenzene-catalyzed synthesis of imidazo[1,2-a]pyridines from aryl ketones with mCPBA in ionic liquid
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Iodobenzene-catalyzed synthesis of imidazo[1,2-a]pyridines from aryl ketones with mCPBA as a cooxidant in ionic liquid is described. The method is simple, rapid and practical, generating Imidazo[1,2-a]pyridines from the aryl ketone without isolation of α-
- Chang, Ya-Li,Wang, Huey-Min,Hou, Rei-Sheu,Kang, Iou-Jiun,Chen, Ling-Ching
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experimental part
p. 153 - 156
(2011/04/16)
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- Convenient synthesis of symmetrical diketosulfides from enolizable ketones using [hydroxy(tosyloxy)iodo]benzene and Na2S·9H20
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An efficient method for the preparation of symmetrical diketosulfides of the type ArCOCH2SCH2COAr has been developed from the reaction of [hydroxy(tosyloxy)iodo]benzene with various acetophenones, followed by treatment with Na2
- Karade, Nandkishor N.,Tiwari, Girdharilal B.,Gampawar, Sumit V.,Shinde, Sandeep V.
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experimental part
p. 172 - 176
(2009/09/30)
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- Synthesis of 2,5-disubstituted 1,3,4-oxadiazine and 1,3,4-thiadiazine from substituted acetophenones and acid hydrazides using [Hydroxyl(tosyloxy)iodo] benzene
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A novel and direct method for the efficient synthesis of 2,5-disubstituted 1,3,4-oxadiazines from the reactions of [hydroxy(tosyloxy)iodo]benzene with substituted acetophenones, followed by the treatment with acid hydrazide and K2CO3, is reported. The met
- Karade, Nandkishor N.,Kondre, Jeevan M.,Gampawar, Sumeet V.,Shinde, Sandeep V.
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experimental part
p. 2279 - 2287
(2009/12/03)
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- Enantioselective synthesis of 1-arylethanediols by rhodium-catalyzed transfer hydrogenation of α-tosyloxyarylketones
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Catalytic transfer hydrogenation of α-tosyloxyarylketones mediated by a chiral rhodium complex using an azeotropic mixture of formic acid/triethylamine afforded the corresponding 1-arylethanediol monotosylates in excellent yield with high enantioselectivity.
- Lee, Do-Min,Kumaraswamy, Gullapalli,Lee, Kee-In
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experimental part
p. 73 - 78
(2010/03/26)
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- One-Pot Protocol for Synthesis of -Organosulfonyloxy Ketones from Secondary Alcohols Using Hypervalent Iodine(V)-Mediated Oxidations
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Tosyloxy ketones and -mesyloxy ketones were directly prepared from alcohols in one pot by treatment with hypervalent iodine(V) reagents in combination with p-toluenesulfonic acid and methanesulfonic acid, respectively, in moderate to good yields. Reaction
- Deshmukh, Swapnil S.,Huddar, Sameerana N.,Akamanchi, Krishnacharya G.
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experimental part
p. 3101 - 3110
(2009/11/30)
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- 4-MeC6H4I-mediated efficient -tosyloxylation of ketones with oxone and p- toluenesulfonic acid in acetonitrile
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Various alkyl aryl ketones, dialkyl ketones, and cycloheptanone were efficiently converted into the corresponding -tosyl-oxy ketones in good yields by using Oxone and p-toluenesulfonic acid monohydrate in the presence of p-iodotoluene in aceton
- Tanaka, Ayumi,Togo, Hideo
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experimental part
p. 3360 - 3364
(2010/03/03)
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- A new application of hypervalent iodine (λ5) reagents with organosulfonic acids for direct α-organosulfonyloxylation carbonyl compounds
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Hypervalent iodine (λ5) reagents in combination with p-toluenesulfonic acid when reacted with ketones under reflux temperature in acetonitrile gave α-tosyloxy ketones in moderate to excellent yields. The reaction was developed further for both
- Mahajan, Ulhas S.,Akamanchi, Krishnacharya G.
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experimental part
p. 987 - 990
(2009/04/04)
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- Direct α-oxytosylation of ketones by using pentavalent organobismuth reagents
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A new method for the preparation of α-tosyloxy ketones by a direct oxytosylation of ketones using a combination of heterocyclic pentavalent organobismuth compounds and p-toluenesulfonic acid monohydrate is described. Copyright
- Sakurai, Naoto,Mukaiyama, Teruaki
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p. 388 - 389
(2008/09/20)
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- PhI- and polymer-supported PhI-catalyzed oxidative conversion of ketones and alcohols to α-tosyloxyketones with m-chloroperbenzoic acid and p-toluenesulfonic acid
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Various ketones were converted to the corresponding α-tosyloxyketones with mCPBA and p-toluenesulfonic acid in the presence of a catalytic amount of iodobenzene. Moreover, secondary alcohols were directly converted to the corresponding α-tosyloxyketones using mCPBA and catalytic amounts of iodobenzene and potassium bromide, followed by treatment with p-toluenesulfonic acid in a one-pot manner. Poly(4-iodostyrene) could be also used as a recyclable catalyst for the same α-tosyloxylation of ketone.
- Yamamoto, Yukiharu,Kawano, Yuhta,Toy, Patrick H.,Togo, Hideo
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p. 4680 - 4687
(2007/10/03)
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- Efficient conversion of ketones to α-tosyloxyketones with m-chloroperbenzoic acid and p-toluenesulfonic acid in the presence of catalytic amount of IL-supported PhI in [emim]OTs
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Various ketones were smoothly converted into the corresponding α-tosyloxyketones with MCPBA and p-toluenesulfonic acid in the presence of a catalytic amount of ionic-liquid (IL)-supported PhI in room temperature ionic liquid, [emim]OTs. Moreover, the pres
- Akiike, Junnosuke,Yamamoto, Yukiharu,Togo, Hideo
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p. 2168 - 2172
(2008/02/10)
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- [Hydroxy(tosyloxy)iodo]benzene mediated α-azidation of ketones
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Reaction of various ketones with [hydroxy(tosyloxy)iodo]benzene (HTIB) followed by treatment of the α-tosyloxy ketones thus generated in situ with NaN3 offers a one-pot procedure for the synthesis of α-azido ketones. The HTIB used in this conversion may also be generated in situ by using iodosobenzene in combination with p-toluene-sulphonic acid.
- Prakash, Om,Pannu, Kamaljeet,Prakash, Richa,Batra, Anita
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p. 523 - 527
(2007/10/03)
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- Hypervalent iodine in the synthesis of bridgehead heterocycles: A facile route to the synthesis of 6-arylimidazo[2,1-b]thiazoles using [hydroxy(tosyloxy)iodo]benzene
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α-Tosyloxyketones (2), readily accessible through hypervalent iodine oxidation of enolizable ketones (1) using [hydroxy(tosyloxy)iodo]benzene (HTIB) in acetonitrile, exclusively generates the 6-arylimidazo[2,1-b]thiazoles (4) on treatment with commerciall
- Aggarwal, Ranjana,Sumran, Garima
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p. 875 - 879
(2007/10/03)
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- A facile [hydroxy(tosyloxy)iodo]benzene mediated synthesis of 2-arylimidazo[1,2-a]pyrimidines and their conversion into 3-bromo-2- arylimidazo[1,2-a]pyrimidines
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α-Tosyloxyketone 2, obtained through hypervalent iodine oxidation of enolizable ketones using [hydroxy(tosyloxy)iodo]benzene (HTIB) in acetonitrile, on treatment with 2-aminopyrimidine 3 generates regioselectively 2-arylimidazo[1,2-a]pyrimidine 6 which up
- Aggarwal, Ranjana,Sumran, Garima
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p. 2690 - 2695
(2007/10/03)
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- PhI-catalyzed α-tosyloxylation of ketones with m-chloroperbenzoic acid and p-toluenesulfonic acid
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Various α-tosyloxyketones were efficiently prepared in high yields from the reaction of ketones with m-chloroperbenzoic acid and p-toluenesulfonic acid in the presence of a catalytic amount of iodobenzene at warming temperature. Georg Thieme Verlag Stuttg
- Yamamoto, Yukiharu,Togo, Hideo
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p. 798 - 800
(2007/10/03)
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- Biphenyl- and terphenyl-based recyclable organic trivalent iodine reagents
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Biphenyl- and terphenyl-based recyclable trivalent iodine reagents, such as 4-bromo-4′-(diacetoxyiodo)biphenyl, 4,4′-bis(diacetoxyiodo)biphenyl, 1,4-bis[4-(diacetoxyiodo)phenyl]benzene, 4-bromo-4′-[(hydroxy)(tosyloxy)iodo]biphenyl, 4,4′-bis[(hydroxy)(tosyloxy)iodo]biphenyl, were simply prepared and their reactivities for the oxidative rearrangement of ketones to esters, TEMPO-mediated oxidation of alcohols to aldehydes or ketones, oxidative dealkylation of N-alkylsulfonamides to sulfonamides, and α-tosyloxylation of ketones were compared with p-(diacetoxyiodo)toluene and p-[(hydroxy)(tosyloxy)iodo]toluene to show the same reactivities and, moreover, the biphenyl- and terphenyl-based iodoarenes formed were recovered by simple filtration of the reaction mixture in every reaction. Thus, these biphenyl- and terphenyl-based trivalent iodine reagents can be used as the recyclable reagents.
- Moroda, Atsushi,Togo, Hideo
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p. 12408 - 12414
(2007/10/03)
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- Hypervalent iodine in synthesis: A novel two-step procedure for the synthesis of new derivatives of 1H-imidazo[1,2-b]-pyrazole by the cyclocondensation between 5-amino-4-cyano-3-phenyl-1H-pyrazole and α-tosyloxyacetophenones or α-haloacetophenones
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A series of new 7-cyano-6-phenyl-2-aryl-1H-imidazo[1,2-b]pyrazoles (5) by the cyclocondensation reactions between 5-amino-4-cyano-3-phenyl-1H-pyrazole (1) and α-bromoacetophenones (3) or α-tosyloxyacetophenones (2) obtained by the reactions of acetophenon
- Ming, Li,Guilong, Zhao,Lirong, Wen,Huazheng, Yang
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p. 493 - 501
(2007/10/03)
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- Utilization of hypervalent iodine in organic synthesis: A novel and facile two-step protocol for the synthesis of new derivatives of 1H-imidazo[1,2-b] pyrazole by the cyclocondensation involving α-tosyloxyacetophenones
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A series of new 2-aryl-7-cyano/ethoxycarbonyl-6-methylthio-1H-imidazo[1,2- e]pyrazoles (5) have been synthesized in moderate to good yields, via a two-step cyclocondensation procedure of 5-amino-4-cyano/ethoxycarbonyl-3-methylthio-1H- pyrazole (1) and α-b
- Li, Ming,Zhao, Guilong,Wen, Lirong,Cao, Wei,Zhang, Shusheng,Yang, Huazheng
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p. 209 - 215
(2007/10/03)
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- Efficient oxidation of benzylic alcohols with [hydroxy(tosyloxy)iodo] benzene under microwave irradiation
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An efficient method for the oxidation of benzylic alcohols with [hydroxy(tosyloxy)iodo]benzene under solvent-free microwave irradiation conditions is described.
- Lee, Jong Chan,Lee, Ji Young,Lee, Seung Jun
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p. 4939 - 4941
(2007/10/03)
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- A facile synthesis of thiazole-2(3H)-thiones through [hydroxy(tosyloxy) iodo]benzene
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A one-pot facile synthesis of thiazole-2(3H)-thiones (4) has been achieved by hypervalent iodine oxidation of ketones (1) using [hydroxy (tosyloxy)iodo]benzene, followed by the treatment of the reaction mixture with dithiocarbamate salts (3) The intermediate α-tosyloxy-ketones (2) have also been isolated and converted to the target compounds.
- Aggarwal, Ranjana,Pundeer, Rashmi,Kumar, Vinod,Chaudhri, Vishwas,Singh, Shiv P.,Prakash, Om
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p. 2659 - 2664
(2007/10/03)
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- Organic Reactions in Ionic Liquids: Ionic Liquid-Accelerated Nucleophilic Substitution Reaction of α-Tosyloxyketones with Potassium Salts of Aromatic Acids
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The room temperature ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate ([bmim][BF4]) is used as a 'green' recyclable alternative to classical molecular solvents for the nucleophilic substitution reaction of α-tosyloxy ketones with pota
- Liu, Zhi,Chen, Zhen-Chu,Zheng, Qin-Guo
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- Novel oxidative α-tosyloxylation of alcohols with iodosylbenzene and p-toluenesulfonic acid and its synthetic use for direct preparation of heteroaromatics
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α-Tosyloxyketones and α-tosyloxyaldehydes were directly prepared from alcohols by treatment with iodosyl-benzene and p-toluenesulfonic acid monohydrate in good yields. This method can be used for the direct preparation of thiazoles, imidazoles, and imidaz
- Ueno, Makoto,Nabana, Takahiro,Togo, Hideo
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p. 6424 - 6426
(2007/10/03)
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- Hypervalent iodine in synthesis. 48. A one-pot convenient procedure for the synthesis of 2-mercaptothiazoles by cyclocondensation of ketones with [hydroxy(tosyloxy)iodo]-benzene and ammonium dithiocarbamate
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α-Tosyloxylation of ketones with [hydroxy(tosyloxy)iodo]-benzene (HTIB), followed by treatment with ammonium dithiocarbamate, provides a one-pot convenient procedure for the synthesis of 2-mercaptothiazoles with good yields.
- Zhang,Chen
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p. 415 - 420
(2007/10/03)
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- Hypervalent iodine in synthesis 81: A one-pot procedure for the synthesis of 1H-imidazole derivatives by cyclocondensation of ketones with [Hydroxy(tosyloxy)iodo]benzene and amidines
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Tosyloxylation of ketones with [hydroxy(tosyloxy)iodo]benzene (HTIB), followed by treatment with amidines provides a one-pot procedure for the synthesis of 1H-imidazole derivatives with good yields.
- Zhang,Chen
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p. 2075 - 2077
(2007/10/03)
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- Hypervalent iodine in synthesis 80: One pot preparation of Se-(β-oxoalkyl) O,O-dialkyl selenophospates by reaction of ketones, [hydroxy(tosyloxy)iodo]benzene, and potassium O,O-dialkyl selenophosphates
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One pot reactions of ketones, [hydroxy(tosyloxy)iodo]benzene and potassium O,O-dialkyl selenophosphates lead to the formation of the corresponding Se-(β-oxoalkyl)O,O-dialkyl selenophosphates under mild conditions and in good yield.
- Xie,Chen
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p. 156 - 157
(2007/10/03)
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- Some hypervalent iodine(III) mediated solid-state transformations
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Some known hypervalent iodine(III) mediated reactions, viz (i) dimerization of acid hydrazides 1a-i, (ii) α-tosyloxylation of acetophenones 3a-f, and (iii) α-hydroxylation of acetophenones 3c,d,f have been effected in solid-state.
- Prakash, Om,Sharma, Vijay
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p. 229 - 231
(2007/10/03)
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- Solid state synthesis of 2-aroylbenzo[b]furans, 1,3-thiazoles and 3-aryl-5,6-dihydroimidazo[2,1-b][1,3]thiazoles from α-tosyloxyketones using microwave irradiation
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The expeditious solventless syntheses of 2-aroylbenzo[e]furans, 1,3-thiazoles and 3-aryl-5,6-dihydroimidazo[2,1-b]-[1,3]thiazoles are described from readily accessible α-tosyloxyketones and mineral oxides in processes that are accelerated by exposure to m
- Varma, Rajender S.,Kumar, Dalip,Liesen, Per J.
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p. 4093 - 4096
(2007/10/03)
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- A Facile [Hydroxy(tosyloxy)iodo]benzene Mediated Synthesis of Substituted Imidazo[1,2-a]pyridines
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Synthesis of 2-substituted imidazo[1,2-a]pyridines (3a-f) has been accomplished by a one-pot procedure involving reaction of 2-aminopyridine with a variety of ketones in presence of [hydroxy(tosyloxy)iodo]benzene. The process results in the exclusive form
- Singh, Shiv P.,Naithani, Rajesh,Prakash
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p. 770 - 772
(2007/10/03)
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- Bridgehead Nitrogen Heterocycles: Facile Synthesis of Imidazo -1,3,4-Thiadiazoles Using Hypervalent Iodine
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2,6 Diarylimidazo -1,3,4 thiadiazoles (3) were synthesized by reactions of either α-haloketones with 2-aminothiadiazoles (1) or directly with acetophenones in the presence of benzene.The latter method is convenient and vers
- Mohan, Jag,Singh, Virender,Kataria, Sangeeta
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p. 617 - 619
(2007/10/03)
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- Hypervalent iodine oxidation: A facile access to α-thiocyanatoketones
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Aryl alkyl ketones (1) on treatment with benzene or benzene undergo oxidation via α-sulphonyloxyketones as intermediates to form α-thiocyanoketones (2) in excellent yields.
- Khanna, Mahavir S.,Sangeeta,Garg, Chandra P.,Kapoor, Ram P.
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- A convenient synthesis of α-anilinoacetophenones using hypervalent iodine
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Hypervalent iodine oxidation of acetophenones (1) with benzene, followed by treatment with appropriate aniline, provides a new, convenient and useful route to the synthesis of α-anilinoacetophenones (3a-h).
- Prakash, Om,Rani, Neena,Goyal, Seema
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p. 349 - 350
(2007/10/02)
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- Hypervalent Iodine in the Synthesis of Bridgehead Heterocycles: Novel and Facile Syntheses of 3-Substituted-5,6-Dihydroimidazothiazoles and 3-Phenylthiazolobenzimidazole from Acetophenones using benzene
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The synthesis of 3-substituted-5,6-dihydroimidazothiazoles 3a-f has been achieved by using a novel and facile method involving hypervalent iodine oxidation of acetophenones 1a-f with benzene, followed by the treatment of the
- Prakash, Om,Rani, Neena,Goyal, Seema
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p. 707 - 710
(2007/10/02)
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