Chloroacetylenes as Michael acceptors. II. Direct ethynylation and vinylation of tertiary enolates.
作者:Andrew S. Kende、Pawel Fludzinski
DOI:10.1016/s0040-4039(00)87345-1
日期:1982.1
The reaction of ClCCCl, PhCCCl and PhSCCCl with a variety of tertiary enolates leads in 43–90% yields to α-chloroethynyl, α-phenylethynyl and α-thiophenylethynyl derivatives. The −CCCl group is smoothly converted to −CCH using copper powder in HOAc/THF, or is directly reduced (H2/Lindlar catalyst) to the −CHCH2 group, thus providing facile access to many α-ethynyl and α-vinyl ketones and esters
ClCCCl,PhCCCl和PhSCCCl与各种叔烯醇化物的反应导致α-氯乙炔基,α-苯基乙炔基和α-硫代苯基乙炔基衍生物的产率为43-90%。该-CCCl组被平稳地转换在HOAc / THF使用铜粉末-CCH,或者被直接还原(H 2 /林德乐催化剂)与-CHCH 2基团,从而提供许多α-容易访问乙炔基和α-乙烯基酮和酯。