Chemistry Letters, Vol.30, No.11, 1080-1081, 2001
GaCl3-promoted ethenylation of thioester silyl enolate and dienolate with silylethyne
In the presence of GaCl3, silyl enol ethers derived from either S-alkyl or S-aryl thioesters are ethenylated at the alpha -carbon atom with trimethylsilylethyne in high yields. The reactions of dienolates give alpha,alpha -diethenyl thioesters.