β-Sulfinyl acrylate esters as a convenient source of alkane- and arenesulfenate anions
摘要:
Methyl acrylate esters bearing alkane- and arenesulfinyl units on the 2-carbon liberate sulfenate anions upon nucleophilic attack. The sulfenates are readily captured through sulfur alkylation. When a sulfenate derived from R-cysteine is generated, diastereoselective benzylation is observed. (C) 2003 Elsevier Ltd. All rights reserved.
Nucleophilic attack of 2-sulfinyl acrylates: A mild and general approach to sulfenic acid anions
作者:Suneel P. Singh、Jennifer S. O'Donnell、Adrian L. Schwan
DOI:10.1039/b917217c
日期:——
An increasing number of reactions of sulfenic acidanions are being demonstrated in the literature. As such, mild, general and reliable means for the generation of sulfenates are due. In the current paper, an addition/elimination of 2-sulfinyl acrylates using various nucleophiles is demonstrated and evaluated as a protocol for alkane- and arenesulfenate generation. Cyclohexanethiolate, methoxide and
[GRAPHICS]Novel Pd-catalyzed sulfinylzincation of activated alkynes was developed, wherein 1-alkynyl sulfoxides work as a sulfinylating agent. Transfer of the sulfinyl group proceeded in a highly syn-selective fashion, giving a beta -sulfinyl vinylzinc species. Using 3,3-dimethyl-1-butynyl p-tolyl sulfoxide as a sulfinyl source, heterocoupling with propiolate derivatives was also accomplished.