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。