Abstract
Dimethylsulfoxonium 3-ethoxycarbonyl-2-phenylallylide derivatives (III-a-f) were prepared from ethyl phenylpropionate derivatives and dimethylsulfoxonium methylide (II) and its addition mechanism were considered. III-a was reacted with dimethyl acetylene-dicarboxylate, ethyl propionate, benzoyl chloride to afford dimethylsulfoxonium 1, 2-dimethoxycarbonyl-5-ethoxycarbonyl-4-phenyl-1, 4-pentadien-3-ylide (VII), dimethyl-sulfoxonium 1, 5-diethoxycarbonyl-4-phenyl-1, 4-pentadien-3-ylide (VIII) and dimethyl-sulfoxonium 1-benzoyl-3-ethoxycarbonyl-2-phenylallylide (IX), respectively. Dimethyl-sulfoxonium 1-phenylcarbamoyl-3-ethoxycarbonyl-2-phenylallylide derivatives (X-a-i) were prepared from III and phenylisocyanate derivatives.
