NOVEL 4-MEMBERED SILICON-PHOSPHORUS-CONTAINING HETEROCYCLES

Four-membered heterocycles have been prepared by the reaction of (meth yldichlorosilyl)- and (dimethylchlorosilyl)methyldichlorophosphines wi th primary aliphatic amines: 1,2lambda3,4-azaphosphasiletidines and ac yclic (methylaminosilyl)methyldiamidophosphonites. The latter eliminat e primary amines on heating in vacuo to give 1,2lambda3,4-azaphosphasi letidines. The structures of the compounds thus obtained have been stu died by P-31, Si-29, H-1, and C-13 NMR.