Photochemical Type I and II Elimination Reactions of Dialkyl (Trichloromethyl)phosphonates

Irradiation of diisobutyl, dipropyl, and diethyl (trichloromethyl)phosphonates in MeCN gave corresponding monoesters and olefins via photochemical type II elimination. In addition, products via type I elimination were obtained from diisobutyl (trichloromethyl)phosphonate and its dimethyl ester.