A convenient method for the preparation of chiral phosphonoacetamides and their Horner–Wadsworth–Emmons reaction
作者:Mario Ordóñez、Eugenio Hernández-Fernández、Martín Montiel-Pérez、Rafael Bautista、Paola Bustos、Haydée Rojas-Cabrera、Mario Fernández-Zertuche、Oscar García-Barradas
DOI:10.1016/j.tetasy.2007.09.033
日期:2007.10
Michaelis–Arbuzov reaction of chiral bromoacetamides obtained in quantitative yield, with trimethyl phosphite, which under Horner–Wadsworth–Emmons conditions with several aryl and alkyl aldehydes under Masamune–Roush procedure using LiCl and DBU in THF or toluene gave the corresponding chiral α,β-unsaturated amides. The present procedure is a convenient and efficient methodology for the preparation of phosphonoacetamides
带有(S)-(α-甲基苄基)苄胺,(S,S)-双(α-甲基苄基)胺,L-苯基甘氨酸甲酯和L-苯基甘醇的手性膦酰基乙酰胺可以通过Michaelis–Arbuzov轻松以高收率制备在Horner–Wadsworth–Emmons条件下,在Masamune–Roush程序下,使用LiCl和DBU在THF或甲苯中,在Horner–Wadsworth–Emmons条件下与几种芳基和烷基醛进行反应,以定量收率得到手性溴乙酰胺。本方法是在高E-选择性下制备膦酰基乙酰胺和手性α,β-不饱和酰胺的方便有效的方法。