Trichloroisocyanuric Acid, as an Industrial Chemical, Promotes Transthioacetalization of Diacetals of 2,2-Bis (Hydroxymethyl)-1,3-propanediol and Cleavage of Thioacetals
Trichloroisocyanuric acid has been used as a mild, efficient, and new catalyst for transthioacetalization of diacetals of 2,2-bis (hydroxymethyl)-1,3-propanediol in CH 2 Cl 2 at room temperature. A clean, easy, and general method for efficientdeprotection of thioacetals to their corresponding carbonyl compounds using trichloroisocyanuric acid/silica gel and water system also is described.
Sulfur-controlled and rhodium-catalyzed formal (3 + 3) transannulation of thioacyl carbenes with alk-2-enals and mechanistic insights
作者:Qiuyue Wu、Ziyang Dong、Jiaxi Xu、Zhanhui Yang
DOI:10.1039/d1ob00116g
日期:——
A rhodium-catalyzed denitrogenative formal (3 + 3) transannulation of 1,2,3-thiadiazoles with alk-2-enals is achieved and a mechanistic investigation is performed, with an inverse KIE of 0.49 obtained.
A Facile Deprotection of Dithioacetals by FeCl<sub>3</sub>/KI
作者:Subhash P. Chavan、Priti B. Soni、Ramesh R. Kale、K. Pasupathy
DOI:10.1081/scc-120016345
日期:2003.1.4
Abstract Carbonylcompounds were regenerated from corresponding dithioacetals via refluxing with FeCl3/KI and methanol as a solvent.
摘要 羰基化合物由相应的二硫缩醛以FeCl3/KI和甲醇为溶剂回流再生。
A Simple and Efficient Heterogeneous Procedure for Thioacetalization of Aldehydes and Ketones
作者:Mohammed Hashmat Ali、Maria Goretti Gomes
DOI:10.1055/s-2005-865303
日期:——
A new procedure for the protection of aldehydes and ketones as thioacetals promoted by catalytic amount of p-toluene-sulfonic acid and silica gel has been developed. This procedure offers versatility, short reaction time,excellent yield, good selectivity, and flexibility in terms of choice of solvent that can be utilized in this reaction. The procedure is easy to carry out and does not require aqueous
Dehydration Reactions in Water. Surfactant-type Brønsted Acid-catalyzed Dehydrative Etherification, Thioetherification, and Dithioacetalization in Water
作者:Shu Kobayashi、Shinya Iimura、Kei Manabe
DOI:10.1246/cl.2002.10
日期:2002.1
Dehydration reactions such as etherification, thioetherification, and dithioacetalization are efficiently catalyzed by a surfactant-type Bronsted acid in water.