highly stereo- and regioselective hydrophosphorylation of terminalalkynes to E-alkenylphosphorus compounds was well developed. It represents a general and practical hydrophosphorylation method, of which diarylphosphine oxide, dialkylphosphine oxide and dialkyl phosphite all had effective P(O)H parts to react with different types of terminalalkynes. Contrary to previous air-sensitive reports, all the reactions