- ANHYDROUS LANTHANUM TRICHLORIDE, A MILD AND CONVENIENT REAGENT FOR THIOACETALIZATION
-
Carbonyl compounds are thioacetalyzed easily by 1,2-ethanedithol in the presence of anhydrous LaCl3.
- Garlaschelli, Luigi,Vidari, Giovanni
-
-
Read Online
- Chemoselective thioacetalisation of aldehydes catalysed by Fe3+-montmorillonite
-
Aldehydes were cleanly and selectively converted to the corresponding dithioacetals almost quantitatively with catalytic amounts of Fe3+-exchanged montmorillonite (Fe3+-mont) even in the presence of ketones. Copyright
- Choudary, Boyapati M.,Sudha, Yepuri
-
-
Read Online
- Chemoselective Protection of Carbonyl Compounds as Dithioacetals Using Silica Gel Supported Aluminium Chloride
-
Silica gel supported aluminium chloride is shown to be a mild chemoselective catalyst for dithioacetalization of carbonyl compounds.
- Tamami,Borujeny, K. Parvanak
-
-
Read Online
- Visible-light promoted dithioacetalization of aldehydes with thiols under aerobic and photocatalyst-free conditions
-
A novel photocatalyst-free visible-light-mediated dithioacetalization of aldehydes and thiols has been developed. This protocol is operationally simple, mild and atom-economical, which provides an environmental benign access to dithioacetals at room temperature under aerobic conditions.
- Xing, Zhimin,Yang, Mingyang,Sun, Haiyu,Wang, Zemin,Chen, Peng,Liu, Lin,Wang, Xiaolei,Xie, Xingang,She, Xuegong
-
supporting information
p. 5117 - 5122
(2018/11/24)
-
- Indium-Catalyzed Reductive Dithioacetalization of Carboxylic Acids with Dithiols: Scope, Limitations, and Application to Oxidative Desulfurization
-
In this study an InI3-TMDS (1,1,3,3-tetramethyldisiloxane) reducing system effectively catalyzed the reductive dithioacetalization of a variety of aromatic and aliphatic carboxylic acids with 1,2-ethanedithiol or 1,3-propanedithiol leading to the one-pot preparation of either 1,3-dithiolane derivatives or a 1,3-dithiane derivative. Also, the intact indium catalyst continuously catalyzed the subsequent oxidative desulfurization of an in situ formed 1,3-dithiolane derivative, which led to the preparation of the corresponding aldehydes.
- Nishino, Kota,Minato, Kohei,Miyazaki, Takahiro,Ogiwara, Yohei,Sakai, Norio
-
p. 3659 - 3665
(2017/04/11)
-
- Sulfonated polyanthracene-catalyzed highly efficient and chemoselective thioacetalization of carbonyl compounds and transthioacetalization of acetals and acylals
-
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
-
-
- Single-step thioetherification by indium-catalyzed reductive coupling of carboxylic acids with thiols
-
Direct thioetherification from a variety of aromatic carboxylic acids and thiols using a reducing system combined with InBr3 and 1,1,3,3-teramethyldisiloxane (TMDS) in a one-pot procedure is demonstrated. It was also found that a system combine
- Sakai, Norio,Miyazaki, Takahiro,Sakamoto, Tomohiro,Yatsuda, Takuma,Moriya, Toshimitsu,Ikeda, Reiko,Konakahara, Takeo
-
supporting information
p. 4366 - 4369
(2012/10/29)
-
- 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
-
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
-
experimental part
p. 917 - 923
(2012/07/16)
-
- Perchloric acid adsorbed on silica gel (HClO4-SiO2) as an extremely efficient and reusable catalyst for 1,3-dithiolane/dithiane formation
-
Perchloric acid adsorbed on silica gel (HClO4-SiO2) has been found to be an extremely efficient and reusable catalyst for 1,3-dithiolane and 1,3-dithiane formation under solvent-free conditions at room temperature. Georg Thieme Verla
- Rudrawar, Santosh,Besra, Ram C.,Chakraborti, Asit K.
-
p. 2767 - 2771
(2008/02/05)
-
- Copper(II) tetrafluoroborate as an extremely efficient catalyst for 1,3-dithiolane/dithiane formation from carbonyl compounds under solvent-free conditions at room temperature
-
Copper(II) tetrafluoroborate hydrate is a new and extremely efficient catalyst for 1,3-dithiolane/dithiane formation from aromatic, heteroaromatic and aliphatic aldehydes and cyclic saturated ketones in 1-5 min under solvent-free conditions at room temper
- Besra, Ram C.,Rudrawar, Santosh,Chakraborti, Asit K.
-
p. 6213 - 6217
(2007/10/03)
-
- Silica gel-supported polyphosphoric acid (PPA/SiO2) as an efficient and reusable catalyst for conversion of carbonyl compounds into oxathioacetals and dithioacetals
-
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
-
p. 2307 - 2310
(2007/10/03)
-
- Indium(III) chloride catalyzed efficient conversion of carbonyl compounds to 1,3-dithioacetals
-
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
-
p. 715 - 719
(2007/10/03)
-
- Pyrylium Salt Sensitized Photochemical Deprotections of Dithioacetals and Ketals
-
Photoreactions of various dithioacetals and ketals using tris(p-chlorophenyl)pyrylium perchlorate as a sensitizer were studied.Irradiation (λ>360 nm) of dichloromethane solutions containing dithioacetals or ketals and pyrylium salt afforded the corresponding carbonyl compounds in good to excellent yields in the presence of molecular oxygen.
- Kamata, Masaki,Murakami, Yukiko,Tamagawa, Yasuko,Kato, Mitsuaki,Hasegawa, Eietsu
-
p. 12821 - 12828
(2007/10/02)
-
- Magnesium Bromide Mediated Selective Conversion of Acetals into Thioacetals
-
Magnesium bromide in ether is found to be a very effective and highly selective reagent for the conversion of acetals into the corresponding thioacetals in the presence of ketones.
- PARK, Jung Ho,KIM, Sunggak
-
p. 629 - 632
(2007/10/02)
-
- Comparative radioprotective activity of various pentagonal compounds with two heteroatomes
-
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.
-
p. 235 - 243
(2007/10/02)
-