ELECTROPHILIC SUBSTITUTIONS OF OLEFINIC HYDROGENS II. ACYLATION OF VINYL ETHERS AND <i>N</i>-VINYL AMIDES

Abstract

Abstract Reactions of vinyl ethers, N-vinyl carboxamides and N-vinyl sulfonamides with trifluoroacetic (or trichloroacetic) anhydride occurred quite easily at room temperature to give corresponding β-trifluoro- or trichloroacetylated compounds in high yields. Reactions with a mixed anhydride, CH3COOCOCF3, gave trifluoroacetylated compounds in high yields, acetyl compounds being not produced.