Organocatalytic Transformation of Aldehydes to Thioesters with Visible Light
作者:Yueteng Zhang、Peng Ji、Wenbo Hu、Yongyi Wei、He Huang、Wei Wang
DOI:10.1002/chem.201900932
日期:2019.6.21
A metal‐ and oxidant‐free catalytic method for accessing structurally diverse thioesters from readily accessible, widespread aldehydes, is described. A strategy of a simple organic 9,10‐phenanthrenequinone‐promoted hydrogen atom transfer (HAT) with visible light was successfully implemented to selectively generate acyl radicals without inducing crossover reactivity of thioester products. The preparative
Aerobic oxidative esterification and thioesterification of aldehydes using dibromoisocyanuric acid under mild conditions: no metal catalysts required
作者:Young-Do Kwon、Minh Thanh La、Hee-Kwon Kim
DOI:10.1039/c8nj01085d
日期:——
thioesters were synthesized by oxidative esterification and thioesterification via in situ generated acyl bromide intermediates, which were used to react with various alcohols and thiols. The esterification and thioesterification were readily performed in the presence of dibromoisocyanuric acid in dichloromethane, without any metal catalysts and undermildconditions. By using this reaction protocol
Synthesis of Thiol Esters Using Nano CuO/Ionic Liquid as an Eco-Friendly Reductive System Under Microwave Irradiation
作者:Juliano B. Azeredo、Marcelo Godoi、Ricardo S. Schwab、Giancarlo V. Botteselle、Antonio L. Braga
DOI:10.1002/ejoc.201300295
日期:2013.8
We report an efficient, fast, and environmentally friendly method for the synthesis of a wide range of thiolesters using stable diorganoyl disulfides and acyl chlorides, using CuO nanoparticles and [pmim]Br as the reductive system. This method gave good to excellent isolated yields of the desired products after only three minutes of microwave irradiation. Furthermore, by using the same green approach
An Odorless, One-Pot Synthesis of Thioesters from Organic Halides, Thiourea and Benzoyl Chlorides in Water
作者:Guo-ping Lu、Chun Cai
DOI:10.1002/adsc.201201059
日期:2013.5.3
Thioesterification can be realized via an odorless, one‐pot reaction through the in situ generation of S‐alkylisothiouronium salts from organic halides and thiourea in aqueous Triton X‐100 (TX100) micelles. The protocol is free of foul‐smell thiols and organic solvents, and operates under mild conditions, thereby offering considerable potential for applications in organic synthesis.
N′-diphenylthiourea, triethylamine, and primary alkyl halides is described. Microwave-assisted heating and a catalytic amount of 4-(dimethylamino)pyridine (DMAP) further improved the yields. Both aromatic and aliphatic carboxylic acids were converted to the corresponding thioesters, and many functionalgroups were compatible with this reaction. Several possible reaction intermediates were investigated, and the