Application of tris(trimethylsilyl) phosphite as convenient phosphorus nucleophile in the direct synthesis of tetrasubstituted α-aminophosphonic acids from ketimines
作者:Bogdan Boduszek、Tomasz K. Olszewski
DOI:10.3998/ark.5550190.p009.773
日期:——
various ketimines leads directly to tetrasubstituted αaminophosphonic acids. The presented reaction proceeds readily at room temperature and provides labile silylated esters of tetrasubstituted α-aminophosphonic acids, as non-isolable reaction intermediates. Subsequent methanolysis of the latter provides the desired α-aminophosphonic acids bearing an fully substituted α-carbon in good overall yields as crystalline
三(三甲基甲硅烷基)亚磷酸酯与各种酮亚胺缩合直接生成四取代的α氨基膦酸。所提出的反应在室温下很容易进行,并提供不稳定的四取代 α-氨基膦酸的甲硅烷基化酯,作为不可分离的反应中间体。后者的后续甲醇分解提供了所需的带有完全取代的 α-碳的 α-氨基膦酸,在从甲醇-丙酮混合物中简单重结晶后,作为结晶非吸湿性固体的总产率良好。nordstom