Reaction of N -Vinylic phosphazenes with carbonyl compounds. Reactivity of the vinyl side chain versus Aza-Wittig reaction
作者:Francisco Palacios、Domitila Aparicio、Jesús M de los Santos
DOI:10.1016/0040-4020(96)00157-3
日期:1996.3
phosphazenes 2 are obtained by Staudinger reaction of conjugated azides 1 and phosphines. Reactions of phosphazenes 2a,b derived from triphenylphosphine with carbonyl compounds 3 involve the γ-carbon atom of the vinyl side chain as nucleophilic center to give monoadducts 4, while phosphazene derived from diphenylmethylphosphine 2c undergoes Aza-Wittig reaction with ethyl glyoxalate and leads to the formation