A series of amidosulfoxides were prepared by the addition of thiophenol to the appropriate alkenoic acid π-bond, and this was followed by reaction of the in situ generated acyl chloride with 3, 4-dimethoxyphenethyl amine. The silicon-induced Pummerer reaction of these amidosulfoxides was carried out using 1-(dimethyl-tert-butylsiloxy)-1-methoxyethylene in dry acetonitrile in the presence of a catalytic amount of ZnI2 and led to the very clean ...
