Abstract
Alkoxycarbonylphosphinic acid alkylesters and trimethylsilylesters of the general formulas RP(O)(COOR')OR'' and RP(O) (COOR')-OSiMe3 (R [dbnd] Me, Et, t-Bu, c-Hex, Ph; R' [dbnd] Me, Et; R'' [dbnd] Et) are prepared under certain conditions from RP(OR'')2 or a mixture of RP(OSiMe3)2/RP(O)(OSiMe3)H and Cl-C(O)OR'. These esters are starting materials for the preparation of various alkoxycarbonylphosphinic acid derivatives. The structure of the title compounds are elucidated by means of their n.m.r. spectra.