Carbon–phosphorus bond formation and transformation in the reaction of 1,2-diaza-1,3-butadienes with alkyl phenylphosphonites
作者:Orazio A. Attanasi、Graziano Baccolini、Carla Boga、Lucia De Crescentini、Paolino Filippone、Fabio Mantellini
DOI:10.1016/j.tet.2008.05.007
日期:2008.7
Abstract The reaction of 1,2-diaza-1,3-butadienes with dialkyl phenylphosphonites under solvent-free conditions proceeds via zwitterionic intermediate and gives, by precipitation, the stable ylidic α-phosphanylidene-hydrazones that, in turn, can be transformed into the corresponding 3-phenyl-2 H -1,2,3λ 5 -diazaphospholes. The latter compounds are converted by hydrolytic cleavage in methanol–water