- Phosphorylated Polyacrylonitrile Fibers as an Efficient and Greener Acetalization Catalyst
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A novel solid acid catalyst (PANEAPF) is developed by immobilization of phosphoric acid on polyacrylonitrile fiber through covalent bonding. Various characterization techniques such as elemental analysis (EA), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FTIR), etc. are utilized to confirm the successful grafting and the stability of the fiber catalysts during application. PANEAPF shows high catalytic activity in the acetalization of aldehydes owing to the high utilization efficiency of its functionalized acid sites. In addition, the strong polarity micro-environment in the surface layers of PANEAPF make it highly suitable for catalytic application in both water and alcohol. Furthermore, the fiber catalyst can be applied to the acetalization of aldehydes in a continuous-flow process at room temperature, and shows excellent reactivity and superior recyclability (over 20 times). The many advantages of PANEAPF such as simple preparation, convenient regulation of acid amount, high durability, and eco-friendly process make it very attractive for fixed-bed reactors in the chemical industry.
- Xu, Gang,Cao, Jian,Zhao, Yali,Zheng, Lishuo,Tao, Minli,Zhang, Wenqin
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supporting information
p. 2565 - 2575
(2017/09/25)
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- Mesoporous sBa-15 silica catalyst functionalized with phenylsulfonic acid groups (SbA-15-ph-So3h) as efficient nanocatalyst for chemoselective thioacetalization of carbonyl compounds
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In this research a Nano acidic catalyst was prepared and its efficiency on thioacetalization of carbonyl compounds was examined. For this aim we used modified SBA-15 as support, which have been modified by phenolic and sulfonic acid. SBA-15 is a member of
- Sedrpoushan, Alireza,Ghazizadeh, Habibollah
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p. 112 - 118
(2017/01/18)
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- Sulfonated polyanthracene-catalyzed highly efficient and chemoselective thioacetalization of carbonyl compounds and transthioacetalization of acetals and acylals
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A straightforward and highly efficient procedure for the thioacetalization of a variety of aldehydes and transthioacetalization of acylals and acetals in good to excellent yields using catalytic amounts of sulfonated polyanthracene (S-PAT) is reported. Th
- Fahid,Pourmousavi
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- Efficient thioacetalisation of carbonyl compounds
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The thioacetalisation of a variety of heterocyclic, aromatic, and aliphatic carbonyl compounds (1 mmol) with ethane-1,2-dithiol (1 mmol) using silica sulphuric acid (SSA) is presented as an efficient heterogeneous catalyst under mild and solvent-free cond
- Habibi, Davood,Rahmani, Payam,Akbaripanah, Ziba
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p. 417 - 421
(2014/01/06)
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- Silica phenyl sulfonic acid as a solid acid heterogeneous catalyst for chemoselective thioacetalization of carbonyl compounds and dethioacetalization under mild conditions
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Silica phenyl sulfonic acid (SPSA) is an effective catalyst for chemoselective thioacetalization of aldehydes in the presence of ketones under neutral conditions. In addition, a simple and an efficient procedure for deprotection of 1,3-dithianes and 1,3-dithiolanes of aromatic, aliphatic, and α,β-unsaturated aldehydes and ketones in the solvent-free to the corresponding parent carbonyl compounds was successfully carried out with SPSA in excellent yields.
- Veisi, Hojat,Sedrpoushan, Alireza,Zolfigol, Mohammad Ali,Mohanazadeh, Farajollah,Hemmati, Saba
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p. E204-E206
(2013/06/04)
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- Aluminum hydrogen sulfate [Al(HSO4)3] as an efficient catalyst for the preparation of thioacetals
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Aluminum hydrogen sulfate, as a heterogeneous solid acid catalyst, has been used for the mild conversion of carbonyl compounds to their thioacetals using 1,2- and 1,3-dithiol under ambient conditions with short reaction times in high to excellent yield in
- Ghashang, Majid
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p. 2837 - 2842
(2013/07/26)
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- Highly efficient and chemoselective method for the thioacetalization of aldehydes and transthioacetalization of acetals and acylals catalyzed by H 2SO4-silica under solvent-free conditions
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Chemoselective and efficient thioacetalization of a variety of aldehydes was achieved in excellent yields at room temperature using 1,2-ethanedithiol in the presence of catalytic amounts of H2SO4-silica. Thioacetals were also prepare
- Pourmousavi, Seied Ali,Kazemi, Shaghayegh Sadat
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experimental part
p. 917 - 923
(2012/07/16)
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- Synthesis of 1,3-dithiane and 1,3-dithiolane derivatives by tungstate sulfuric acid: Recyclable and green catalyst
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An efficient, novel, and environmentally benign procedure for the thioacetalization of aliphatic and aromatic carbonyl compounds in the presence of catalytic amounts of tungstate sulfuric acid under solvent-free conditions to afford 1,3-dithianes and 1,3-
- Karami, Bahador,Taei, Mahbubeh,Khodabakhshi, Saeed,Jamshidi, Masih
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experimental part
p. 65 - 74
(2012/07/14)
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- Oxidative cross-esterification of dithiolanes with alcohols through a cross-dehydrogenative coupling (CDC)/deprotection sequence
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An unprecedented oxidative cross-esterification in an equimolar mixture of dithiolanes, alcohols and water through a CDC/deprotection sequence has been developed. The reaction itself features simple experimental procedures under very mild conditions and offers a new strategic protocol for the direct and efficient synthesis of structurally diverse esters.
- Fu, Liang,Yao, Chang-Jiang,Chang, Ning-Jie,Chen, Jia-Rong,Lu, Liang-Qiu,Xiao, Wen-Jing
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supporting information; scheme or table
p. 506 - 508
(2012/01/15)
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- An efficient method for the transthioacetalization of acylals and acetals under mild conditions
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A rapid and efficient method for the transthioacetalization of acylals (1,1-diacetates) and acyclic and cyclic acetals is described. The reaction was carried out using 1-benzyl-4-aza-1-azoniabicyclo[2.2.2]octane tribromide (1 mol%). The yield of the transthioacetalization was high and reaction conditions involve the use of acetonitrile as the solvent at room temperature; isolation is simple and the products are nearly pure.
- Pourmousavi, Seied Ali,Hadavankhani, Majid,Zinati, Zahra
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experimental part
p. S495-S501
(2012/05/31)
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- Poly(N-bromobenzene-1,3-disulfonamide) and N,N,N′,N′- tetrabromobenzene-1,3-disulfonamide as a mild and efficient catalyst for chemoselective thioacetalization of carbonyl functions and transthioacetalization reactions
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Poly(N-bromobenzene-1,3-disulfonamide) and N,N,N′,N′- tetrabromobenzene-1,3-disulfonamide are effective catalysts for chemoselective dithioacetalization of aldehydes in the presence of ketones under neutral conditions.
- Veisi, Hojat,Ghorbani-Vaghei, Ramin,Dadamahaleh, Somayeh Akbari
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experimental part
p. 699 - 705
(2011/07/31)
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- Silica-supported phosphorus pentoxide: A reusable catalyst for S,S-acetalization of carbonyl groups under ambient conditions
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Phosphorus pentoxide supported on silica gel (P2O 5/SiO2) efficiently acts as a highly active and reusable catalyst for cyclic and non-cyclic S,S-acetalization of a variety of carbonyl compounds under mild, solvent-free an
- Shaterian, Hamid Reza,Azizi, Kobra,Fahimi, Nafiseh
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experimental part
p. 85 - 91
(2012/01/06)
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- 1,3-dibromo-5,5-dimethylhydantoin (DBH) as a mild and efficient catalyst for chemoselective thioacetalization of carbonyl compounds and dethioacetalization under mild conditions
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Hydantoin bromide is an effective catalyst for chemoselective thioacetalization of aldehydes in the presence of ketones under neutral conditions. In addition, a simple and efficient procedure for the deprotection of 1,3-dithianes and 1,3-dithiolanes of ar
- Veisi, Hojat,Amiri, Mostafa,Hamidian, Amir Hossein,Malakootikhah, Javad,Fatolahi, Leila,Faraji, Alireza,Sedrpoushan, Alireza,Maleki, Behrooz,Saremi, Shokufe Ghahri,Noroozi, Mohammad,Bahadoori, Fatemeh,Veisi, Somayeh
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experimental part
p. 689 - 696
(2010/06/19)
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- An efficient method for chemoselective thioacetalization of aldehydes in the presence of a catalytic amount of acidic ionic liquid under solvent-free conditions
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A water-stable Br?nsted acidic ionic liquid with an alkane sulfonic acid group was synthesized. This ionic liquid catalyzed the thioacetalization reaction smoothly to afford 1,3-dithianes in excellent yield and less time. In this article we describe a mil
- Hajipour, Abdol Reza,Azizi, Ghobad,Ruoho, Arnold E.
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experimental part
p. 1974 - 1978
(2010/03/31)
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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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- Chemoselective dithioacetalization of carbonyl compounds using magnesium hydrogensulfate as efficient heterogeneous catalyst
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Carbonyl compounds have been successfully converted into their corresponding dithiolanes and dithianes derivatives with 1,2-ethanedithiol and 1,3-propanedithiol in excellent yield at room temperature and short reaction times using a catalytic amount of ma
- Shaterian, Hamid Reza,Hosseinian, Asghar,Ghashang, Majid,Khorami, Fahimeh
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experimental part
p. 2490 - 2501
(2009/08/07)
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- Ferric hydrogensulfate as effective and recyclable catalyst for mild dithioacetalization of aldehydes and ketones
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Ferric hydrogensulfate has been found to be an extremely efficient and recyclable heterogeneous catalyst for dithioacetalization reactions. Carbonyl compounds have been successfully converted into their corresponding dithiolanes and dithianes derivatives
- Shaterian, Hamid Reza,Ahmadian, Hamid Reza,Ghashang, Majid,Doostmohammadi, Razieh,Yarahmadi, Hossein
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experimental part
p. 1099 - 1108
(2009/04/07)
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- Application of BU4N+HSO4- as an ionic liquid and acid catalyst for thioacetalization of aldehydes and ketones
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A variety of carbonyl containing compounds have been successfully reacted with 1,2-ethanedithiol in a thioacetylization reaction using tetrabutylammonium hydrogensulfate as a mild and efficient catalyst. Aldehydes and ketones react with good to excellent
- Hajipour, Abdol R.,Hosseini, Peyman,Ruoho, Arnold E.
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experimental part
p. 2502 - 2508
(2009/08/07)
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- Chemoselective and solvent-free thioacetalization of aldehydes by a catalytic amount of NBS
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A chemoselective, straightforward, and rapid method for thioacetalization of aldehydes by use of 1,2-ethandithiol and a catalytic amount of N-bromosuccinimide under solvent-free conditions is reported. The reaction takes place in excellent yields and shor
- Hajipour, Abdol Reza,Ali Pourmousavi, Seied,Ruoho, Arnold E.
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p. 2807 - 2811
(2007/10/03)
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- A mild and chemoselective catalyst for thioacetalization under solvent free conditions
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Protection of a variety of carbonyl compounds as dithioacetals using P 2O5/SiO2 (75%), as a mild and chemoselective catalyst, was achieved under solvent free conditions in very good yields. Copyright Taylor & Francis Group
- Hajipour, Abdol R.,Zarei, Amin,Khazdooz, Leila,Zahmatkesh, Saeed,Ruoho, Arnold E.
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p. 387 - 395
(2007/10/03)
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- A facile and efficient procedure for the transdithioacetalization of 1,1-diacetates using POCl3-montmorillonite as catalyst
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A rapid and efficient method for the transdithioacetalization of 1,1-diacetates with 1,2-dithioglycol was described in good to excellent yield catalyzed by POCl3-montmorillonite.
- Jin, Tong-Shou,Sun, Guang,Li, Yan-Wei,Li, Tong-Shuang
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p. 4105 - 4110
(2007/10/03)
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- Indium(III) chloride catalyzed efficient conversion of carbonyl compounds to 1,3-dithioacetals
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Several aldehydes and ketones were efficiently converted into their corresponding dithioacetals and 1,3-dithianes in high yields using catalytic amount of indium(III) chloride in dichloromethane.
- Yadav,Subba Reddy,Pandey, Sushil Kumar
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p. 715 - 719
(2007/10/03)
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- A rapid and efficient method of thioacetalization of carbonyl compounds catalysed by POCl3-montmorillnite
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Aldehydes and ketones were thioactalized with 1,2-ethanedithiol in the presence POCl3-montmorillonite at room temperature in excellent yields.
- Jin,Sun,Ma,Li
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p. 1669 - 1673
(2007/10/03)
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- Selective Transdithioacetalization of Acetals, Ketals, Oxathioacetals and Oxathioketals Catalyzed by Envirocat EPZ10 R
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Envirocat EPZ10R has been found to be a remarkable reusable heterogeneous catalyst for selective transdithioacetalization of acetals, ketals, oxathioacetals and oxathioketals with HSCH2CH2SH and HSCH2CH2/s
- Gajare,Shingare,Bandgar
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p. 452 - 453
(2007/10/03)
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- RADICAL-ANIONS GENERATED FROM CYCLIC ACETALS OF NITROBENZALDEHYDE, 2-NITRO-1,3-PROPANEDIOL, AND THEIR HETERO ANALOGS
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The potassium salts of the radical-anions of 2-nitrophenyl-1,3-diheterocycloalkanes and 5-alkyl-5-nitro-1,3-diheterocycloalkanes were generated in the liquid phase.The ESR spectra of the radical anions were analyzed, and it was concluded that the 1,3-dihe
- Kukovitskii, D. M.,Zorin, V. V.,Zelechonok, Yu. B.,Zlot-skii, S. S.,Rakhmankulov, D. L.,Todres, Z. V.
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p. 132 - 136
(2007/10/02)
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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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