Hydrophobic Polymer-Supported Catalyst for Organic Reactions in Water: Acid-Catalyzed Hydrolysis of Thioesters and Transprotection of Thiols
摘要:
A hydrophobic polystyrene-supported sulfonic acid was found to be effective for hydrolysis of thioesters in pure water. It was revealed that the catalyst was much superior to other Bronsted acid catalysts. Transprotection of thiols from thioesters to thioethers has been successfully performed in water using this catalytic system.
From carboxylic acids to the trifluoromethyl group using BrF3
作者:Or Cohen、Eyal Mishani、Shlomo Rozen
DOI:10.1016/j.tet.2010.03.045
日期:2010.5
Organic trifluoromethyl derivatives were made from aromatic and aliphatic carboxylic acids by transforming them first into the corresponding dithioesters followed by reaction with bromine trifluoride under mild conditions (0 degrees C, 2 min). (C) 2010 Elsevier Ltd. All rights reserved.
Thiol Ester−Boronic Acid Cross-Coupling. Catalysis Using Alkylative Activation of the Palladium Thiolate Intermediate
作者:Cecile Savarin、Jiri Srogl、Lanny S. Liebeskind
DOI:10.1021/ol000231a
日期:2000.10.1
[GRAPHICS]Thiol esters and boronic acids do not participate in cross-coupling in the presence of palladium catalysts. However, efficient palladium-catalyzed thiol ester-boronic acid cross-coupling is observed when simple alkylating agents are present. Alkylative conversion of the very stable palladium-thiolate bond to a labile palladium-thioether bond is presumed to be crucial to the catalysis. Of the systems studied, 4-halo-nbutyl thiol esters were most effective in this cross-coupling.
Bestmann,H.J. et al., Chemische Berichte, 1966, vol. 99, p. 1906 - 1911
作者:Bestmann,H.J. et al.
DOI:——
日期:——
Ralston; Segebrecht; Bauer, Journal of Organic Chemistry, 1939, vol. 4, p. 503,504
作者:Ralston、Segebrecht、Bauer
DOI:——
日期:——
Ester Interchange Reactions of Long Chain Thiol Esters<sup>1</sup>
作者:GEORGE S. SASIN、PAUL R. SCHAEFFER、RICHARD SASIN