- Blue LED-Promoted Oxathiacetalization of Aldehydes and Ketones
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In synthetic chemistry, the protection of aldehydes and ketones is crucial during multistep synthesis of complex molecules. Organic chemists have paid substantial attention to the synthesis of 1,3-oxathiolanes and 1,3-oxathianes because of their considera
- Liu, You-Chen,Reddy, Daggula Mallikarjuna,Chen, Xin-An,Shieh, Yi-Chen,Lee, Chin-Fa
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p. 2542 - 2552
(2020/04/27)
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- Facile protection of carbonyl compounds as oxathiolanes and thioacetals promoted by PEG1000-based dicationic acidic ionic liquid as chemoselective and recyclable catalyst
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Efficient oxathioacetalization and thioacetalization of carbonyl compounds have been achieved in high yields employing PEG1000-based dicationic acidic ionic liquid as a catalyst. The PEG ionic liquid and toluene have the advantages of both homo
- Ren, Yi-Ming,Shao, Juan-Juan,Wu, Zhi-Chuan,Zhang, Shuai,Tao, Ting-Xian
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p. 392 - 394
(2014/06/09)
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- Nickel(II) chloride hexahydrate catalyzed reaction of aromatic aldehydes with 2-mercaptoethanol: Formation of supramolecular helical assemblage of the product
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Various aromatic aldehydes on reaction with 2-mercaptoethanol provided an unanticipated product, bis(2-hydroxyethyl)dithioacetals (3) as the major product along with the expected product 1,3-oxathiolanes (4) in the presence of 0.05 equiv amount of nickel(
- Laskar, Rajibul A.,Begum, Naznin A.,Mir, Mohammad Hedayetullah,Rohman, Md. Rumum,Khan, Abu T.
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p. 5839 - 5844
(2013/10/21)
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- An efficient method for the oxathioacetalization of carbonyl compounds using N-bromosaccharin as a catalyst
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A mild and highly chemoselective method for the preparation of oxathiolane from aliphatic and aromatic aldehydes and ketones with 2-mercaptoethanol in the presence of catalytic amount of N-bromosaccharin at room temperature is reported.
- Alinezhad, Heshmatollah,Fallahi, Shahrouz
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experimental part
p. 927 - 929
(2012/08/28)
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- An efficient and mild deprotection of 1,3-oxathiolanes to carbonyl compounds using the superoxide ion
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An efficient deprotection of 1,3-oxathiolanes to carbonyl compounds has been achieved under the mild reaction conditions of tetraethylammonium superoxide in an aprotic medium at room temperature.
- Singh, Satish Kumar,Singh, Krishna Nand
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body text
p. 2339 - 2343
(2010/03/26)
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- Chemoselective dithioacetalization and oxathioacetalization of carbonyl compounds using alumina sulfuric acid as catalyst
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Carbonyl compounds have been successfully converted into their corresponding dithiolane, dithiane, and oxathiolane derivatives using a catalytic amount of alumina sulfuric acid (Al2O3-SO3H) with excellent yields at room temperature in short reaction times under mild conditions. This simple method is a highly chemoselective procedure for protection of aldehydes in the presence of ketones, and the heterogeneous catalyst can be recovered and reused several times without any loss of its activity. Copyright Taylor & Francis Group, LLC.
- Shaterian, Hamid Reza,Hosseinian, Asghar,Ghashang, Majid
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experimental part
p. 4097 - 4106
(2009/04/11)
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- Facile protection of carbonyl compounds as oxathiolanes and transoxathioacetalization of oxyacetals promoted by iron(III) trifluoroacetate or trifluoromethanesulfonate as chemoselective and recyclable catalysts
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Oxathioacetalization of carbonyl compounds and transoxathioacetalization of O,O-acetals/ketals are reported under nearly neutral conditions promoted by iron(III) trifluoroacetate [Fe(CF3CO2)3] or trifluoromethanesulfonate
- Adibi, Hadi,Jafari, Hadi
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p. 679 - 682
(2008/01/01)
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- An efficient and chemoselective method for conversion of carbonyl compounds to 1,3-oxathiolanes with 2-mercaptoethanol catalyzed by TiCl 4-montmorillonite
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Formation of 1,3-oxathiolanes from aldehydes and ketones using 2-mercaptoethanol in the presence of TiCl4-montmorillonite under mild reaction conditions in excellent yields is described. Chemoselective monothioacetalization of aldehyde in the p
- Jin, Tong-Shou,Zhao, Rui-Qiao,Ma, Yan-Ran,Yang, Mi-Na,Guo, Jun-Jie,Li, Tong-Shuang
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p. 503 - 505
(2007/10/03)
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- Microwave-mediated efficient protection of carbonyl compounds as 1,3-oxathiolanes in the presence of iodine under solvent free condition
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A mild, efficient, and solvent free protocol for conversion of aldehydes and ketones into their corresponding 1,3-oxathiolanes using 2-mercaptoethanol in the presence of catalytic amount of elemental iodine is reported. Copyright
- Bez, Ghanashyam,Baruah, Nabajyoti
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p. 542 - 543
(2007/10/03)
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- Iron(III) fluoride: A highly efficient and versatile catalyst for the protection of carbonyl compounds under solvent-free conditions
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Carbonyl compounds are successfully converted into oxathioacetals and dithioacetals with 2-mercaptoethanol and ethane-1,2-dithiol using a catalytic amount of iron(m) fluoride under solvent-free conditions. The catalysts were recovered and reused in variou
- Bandgar, Babasaheb P.,Kamble, Vinod T.,Kulkarni, Ashwini
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p. 607 - 610
(2007/10/03)
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- Tantalum(V) chloride-silica gel: An efficient catalyst for conversion of carbonyl compounds to 1,3-oxathiolanes
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A variety of carbonyl compounds can be easily converted to the corresponding 1,3-oxathiolanes in the presence of a catalytic amount of tantalum(V) chloride [TaCl5] on silica gel in dichloromethane. Mild reaction conditions, efficiency, high yie
- Chandrasekhar,Prakash, S. Jaya,Shyamsunder,Ramachandar
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p. 3127 - 3131
(2007/10/03)
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- Silica gel-supported polyphosphoric acid (PPA/SiO2) as an efficient and reusable catalyst for conversion of carbonyl compounds into oxathioacetals and dithioacetals
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A simple and efficient method for the conversion of carbonyl compounds to oxathioacetals and dithioacetals by using polyphosphoric acid supported on silica gel (PPA/SiO2) as an acid catalyst have been developed. PPA/SiO2 is easily re
- Aoyama, Tadashi,Takido, Toshio,Kodomari, Mitsuo
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p. 2307 - 2310
(2007/10/03)
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- Organic reactions in aqueous media: I2-in-water-catalysed rapid and chemoselective oxathioacetalisation of aldehydes under mild conditions
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I2 in water is found to be an efficient catalyst for the chemoselective protection of both aliphatic and aromatic aldehydes as 1,3-oxathioacetals under mild conditions. Fast reactions and excellent yields of pure products using an inexpensive a
- Bandgar,Bettigeri, Sampada V.
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p. 389 - 391
(2007/10/03)
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- Ytterbium(III) triflate-catalyzed conversion of carbonyl compounds into 1,3-oxathiolanes in ionic liquids
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The reaction of carbonyl compounds with 2-mercapto-ethanol to prepare 1,3-oxathiolanes has been successfully carried out in ionic liquids using ytterbium(III) triflate as a catalyst. Yields of the products are high and the catalyst can be easily recovered
- Kumar, Anil,Jain, Nidhi,Rana, Sandeep,Chauhan, Shive M. S.
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p. 2785 - 2787
(2007/10/03)
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- Scandium(III) Triflate as an Efficient and Recyclable Catalyst for Chemoselective Conversion of Carbonyl Compounds to 1,3-Oxathiolanes
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A variety of carbonyl compounds can be easily and rapidly converted to the corresponding 1,3-oxathiolanes in the presence of a catalytic amount of scandium(III) triflate [Sc(OTf)3] in CH2Cl2. After completion of the reacti
- Karimi, Babak,Ma'mani, Leila
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p. 2503 - 2506
(2007/10/03)
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- 2,4,4,6-Tetrabromo-2,5-cyclohexadienone (TABCO), N-bromosuccinimide (NBS) and bromine as efficient catalysts for dithioacetalization and oxathioacetalization of carbonyl compounds and transdithioacetalization reactions
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The use of 2,4,4,6-tetrabromo-2,5-cyclohexadienone (TABCO), N-bromosuccinimide (NBS), and bromine as efficient catalysts for conversion of carbonyl compounds to their cyclic and acyclic dithioacetals and 1,3-oxathiolanes under mild reaction conditions are described. These catalysts are also used for efficient transdithioacetalization of acetals, diacetals, ketals, acylals, enamines, hydrazones, and oximes with high yields in the presence of thiols.
- Iranpoor, Nasser,Firouzabadi, Habib,Shaterian, Hamid Reza,Zolfigol
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p. 1047 - 1071
(2007/10/03)
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- Indium trifluoromethanesulfonate as a mild and chemoselective catalyst for the conversion of carbonyl compounds into 1,3-oxathiolanes
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An efficient method for the preparation of 1,3-oxathiolanes from aldehydes and ketones with 2-mercaptoethanol in the presence of a catalytic amount of indium trifluoromethanesulfonate is reported.
- Kazahaya, Kiyoshi,Hamada, Nao,Ito, Shinya,Sato, Tsuneo
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p. 1535 - 1537
(2007/10/03)
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- Zirconium tetrachloride (ZrCl4) as an efficient and chemoselective catalyst for conversion of carbonyl compounds to 1,3-oxathiolanes
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Different types of aldehydes and ketones can be efficiently converted into their corresponding 1,3-oxathiolanes using 2-mercaptoethanol (1.5-3.2 equiv.) in the presence of catalytic amount (0.04-0.15 equiv.) of ZrCl4 in CH2Cl2/
- Karimi, Babak,Seradj, Hassan
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p. 805 - 806
(2007/10/03)
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- Comparative radioprotective activity of various pentagonal compounds with two heteroatomes
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Various heterocyclic compounds with two heteroatomes were synthesized and their potential radioprotective activity was tested. This study shows the interest of phenylthiazolidines derivatives in chemical radioprotection.
- Robbe,Fernandez,Dubief,et al.
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p. 235 - 243
(2007/10/02)
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