Synthesis and properties of 1-diphenylboryl-2-diphenylphosphinoethene

1-Diphenyl-2-diphenylphosphino-1,2-diphenylethene was prepared by successive interactions of lithium phenylacethylenide with triphenylborane and diphenylchlorophosphine and its chemical properties were studied. It was shown that substitution of phenyl substituents at B atom for aklyl ones in 1,2-borylphosphinoethenes resulted in marked decrease in borylphosphinoethene reactivity. Strengthening of intramolecular donor-acceptor interaction may be the reason of the fact