Zemtsov AA, Ashirbaev SS, Levin VV, Kokorekin VA, Korlyukov AA, Dilman AD. Photoredox Reaction of 2-Mercaptothiazolinium Salts with Silyl Enol Ethers.
J Org Chem 2019;
84:15745-15753. [PMID:
31693367 DOI:
10.1021/acs.joc.9b02478]
[Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
A method for the generation 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 single-electron oxidation and elimination of the silyl cation.
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