New synthesis of thiiranes by fluoride ion-promoted reaction of S-methyl-S′-trimethylsilylmethyl N-(p-toluenesulfonyl)dithioiminocarbonate and 2-(trimethylsilylmethylthio)thiazoline with aldehydes
introduction of a thioformaldehyde unit to a carbonyl carbon. The reaction of these compounds with aldehydes in the presence of cesium fluoride afforded thiiranes via the 1,3-dipolarcycloaddition of iminothiocarbonyl ylide to CO double bond.
Photoredox Reaction of 2-Mercaptothiazolinium Salts with Silyl Enol Ethers
作者:Artem A. Zemtsov、Salavat S. Ashirbaev、Vitalij V. Levin、Vladimir A. Kokorekin、Alexander A. Korlyukov、Alexander D. Dilman
DOI:10.1021/acs.joc.9b02478
日期:2019.12.6
of free radicals from thiazolinium salts upon photocatalytic reduction is described. The thiazolinium salts are generated by treatment with methyl triflate of 2-mercaptothiazolines, which can be readily obtained from alkyl bromides and tosylates via a nucleophilic substitution reaction or by hydrothiolation of alkenes. Silyl enol ethers were used to trap the radicals, furnishing ketones after successive