Studies on Organophosphorus Compounds; XLVI. A Facile and Direct Route to Dialkyl 1-(Benzyloxycarbonylamino)alkylphosphonates and Dialkyl or Diphenyl α-(Benzyloxycarbonylamino)benzylphosphonates
作者:Chengye Yuan、Guohong Wang、Shoujun Chen
DOI:10.1055/s-1990-26927
日期:——
A simple and direct method for the preparation of dialkyl 1-(benzyloxycarbonylamino) alkylphosphonates and dialkyl or diphenyl α-(benzyloxycarbonylamino)benzylphosphonates in high yields consists of the three-component reaction of benzyl carbamate, an alkanal or a benzaldehyde, and a dialkyl (or dipbenyl)-phosphite in acetyl chloride at 0°C (for alkanals) or in acetic acid containing thionyl chloride at 20-70°C (for benzaldehydes). Removal of the benzyloxycarbonyl group by standard methods or selective hydrolysis of the dialkyl phosphonate moiety leads to the formation of derivatives of aminoalkylphosphonic acids bearing free amino or acidic functions, which are useful intermediates in phosphonopeptide synthesis.
一种简单直接的方法用于制备高产率的二烷基1-(苄氧羧酰氨基)烷基磷酸酯和二烷基或二苯基α-(苄氧羧酰氨基)苄基磷酸酯,该方法包括苄基氨基甲酸酯、烷醛或苯甲醛和二烷基(或二苯基)磷酸酯在0°C的乙酰氯中(三组分反应)(针对烷醛)或在20-70°C的含有氯化亚硫酰的醋酸中进行(针对苯甲醛)。通过标准方法去除苄氧羧酰基或选择性水解二烷基磷酸酯部分,可以得到具有游离氨基或酸性功能的氨基烷基磷酸衍生物,这些衍生物在磷酸肽合成中是有用的中间体。