Chemistry of O-silylated ketene acetals: A novel intramolecular Pummerer-type reaction of .OMEGA.-carbamoylsulfoxides leading to .ALPHA.-thiolactams.
作者:Yasuyuki KITA、Osamu TAMURA、Norio SHIBATA、Takashi MIKI
DOI:10.1248/cpb.38.1473
日期:——
ω-Carbamoylsulfoxides undergo a novel intramolecular Pummerer-type reaction with O-silylated ketene acetal in dry acetonitrile in the presence of a catalytic amount of zinc iodide to give α-thiolactams in good to excellent yields under nearly neutral conditions.
在干燥的乙腈中,在一定量的碘化锌催化下,ω-氨基甲酰硫醚与 O-硅烷化酮缩醛发生了一种新颖的分子内 Pummerer 型反应,从而在接近中性的条件下以良好到极好的收率得到了 α-硫内酰胺。