Palladium-Catalyzed Preparation of Dialkyl Allylphosphonates. A New Preparation of Diethyl 2-Oxoethylphosphonate
作者:R. Malet、M. Moreno-Mañas、R. Pleixats
DOI:10.1080/00397919208019075
日期:1992.8
Abstract Palladium-catalyzed Michaelis-Arbuzov reaction of allyl acetates with trialkyl phosphites affords dialkyl allylphosphonates. Diethyl 2-oxoethylphosphonate is efficiently prepared by ozonization of diethyl allylphosphonate.
A facile method for the synthesis of organophosphonates from alkenes and dialkyl phosphites was developed by the use of Mn(II) under air. Thus, the reaction of 1-octene with diethyl phosphite in the presence of Mn(OAc)(2) (5 mol %) under air at 90 degreesC led to diethyl octylphosphonate (78%) and diethyl (2-hexyl)decylphosphonate (6%). Internal alkenes such as cis-2-octene gave a regioisomeric mixture of the corresponding hydrophosphorylation products in 84% yields.