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.
A Simple and Efficient Access to α-Amino Phosphonates from <i>N</i>-Benzyloxycarbonylamino Sulfones Using Indium(III) Chloride†Studies on Novel Synthetic Methodologies. 188.
作者:Biswanath Das、Kongara Damodar、Nisith Bhunia
DOI:10.1021/jo900558d
日期:2009.8.7
Treatment of N-benzyloxycarbonylamino sulfones with triethyl phosphite catalyzed by InCl3 produces the corresponding protected α-amino phosphonates in high yields (71−92%).
Improved facile synthesis of α-amino phosphonates by the reaction of α-amido sulfones with dialkyl trimethyl silyl phosphites catalyzed by Fe(III) chloride
作者:Boyapati Veeranjaneyulu、Biswanath Das
DOI:10.1080/00397911.2016.1270323
日期:2017.3.4
ABSTRACT An improved efficient synthesis of α-aminophosphonates has been discovered by the reaction of N-benzyloxycarbonylamino sulfones with dialkyl trimethyl silyl phosphites in the presence of FeCl3 as a catalyst. The products were formed in high yields (86–94%) within 2–4 h. The catalyst is inexpensive, easily available, and highly active. The unreacted dialkyl trimetyl silyl phosphites can easily