Addition of Bis(trimethylsiloxy)phosphine to Aryl-substituted Acetylenes

摘要

Addition of bis(trimethylsiloxy)phosphine to styrene,its heterocyclic analogs,and vinylferrocene is a convenient method for preparing functionalyzed phosphonites and their derivatives [1].In the present work we showed that bis(trimethylsiloxy)phosphine A reacts with aryl-substituted acetylenes in a way much different from its exothermic addition to dimethyl acetylenedicarboxylate [2],i.e.by a radical mechanism and only in the presence of a catalyst,azo-diisobutyronitrile,under conditions of its thermolysis at 100-120 deg C.