Generation of Phosphorus Ester, Phosphorus Amide, and Phosphine Derivatives of Low Coordination Number.

摘要

Numerous derivatives of metaphosphoric acid were generated by thermolysis of 2,3-oxaphosphabicyclo(2.2.2)octene derivatives, through an apparent retrocycloaddition process. Metaphosphonic acid anhydrides were similarly generated. These low-coordination species are recognized by trapping reactions with alcohols, amines, epoxides, and in certain cases with N-methylpyrrole and silica gel. The latter is converted to a novel phosphorylated form having potential practical applications. Phosphaalkenes were also generated by thermolysis of derivatives with the 7-phosphabicyclo(2.2.2) octadiene ring system, and recognized by trapping reactions with dienes. (RRH)