New 4-phosphino-1,3,2-dioxaborinanes

Molecular and crystal structure of bis[(5,6-benzo-2-phenyl-1,3,2-dioxaborinane-4)phenylphosphino]methane are ascertained by the method of X-ray diffraction analysis. Interaction of methyl (phenyl) phosphine and salicyl aldehyde with phenylboric acid ester gives rise to preparation of its monoheterocyclic analog - 4-methyl(phenyl) phosphino-2-phenyl-5,6-benzo-1,3,2-dioxaborinane and its sulfide. It is shown that in the series 4-aryl(alkyl)phosphino 1,3,2-dioxaborinanes no stacking-conformations realized for 4-diarylphosphino-1,3,2-dioxaboraphosphorinanes are observed