Asymmetric Synthesis of Cyclic α-Amino Phosphonates Using Masked Oxo Sulfinimines (<i>N</i>-Sulfinyl Imines)
作者:Franklin A. Davis、Seung H. Lee、He Xu
DOI:10.1021/jo040127x
日期:2004.5.1
Five-, six-, and seven-membered cyclic α-amino phosphonates, amino acid surrogates, are prepared in enantiomerically pure form via the highly diastereomeric addition of metal phosphonates to masked oxo sulfinimines. Hydrolysis of the resulting masked oxo α-amino phosphonates followed by reduction of the intermediate cyclic imino phosphonates affords the title compounds in good yield.
五,六和七元环状α-氨基膦酸酯(氨基酸替代物)是通过将金属膦酸酯高度非对映异构体加到被掩盖的氧亚磺胺上而制成对映体纯形式的。水解所得的掩蔽的羰基α-氨基膦酸酯,然后还原中间体环状亚氨基膦酸酯,以良好的收率得到标题化合物。