Conversion of nitriles to 1-aminophosphonic acids and preparation of phosphahomocysteines of high enantiomeric excess
作者:Renzhe Qian、Jeannie Horak、Friedrich Hammerschmidt
DOI:10.1080/10426507.2017.1284844
日期:2017.6.3
1-aminophosphonic acids or reacted with Boc2O to yield N-Boc-protected 1-aminophosphonates. The enantiomers of 2-benzylthio-1-(t-butoxycarbonylamino)propylphosphonate were obtained from the racemate by chiral HPLC and converted to phosphonic acid analogs of (R)- and (S)-homocysteine, (R)- and (S)-2-aminobutyric acid and (S)-methionine, all of ee >97% as determined by chiral HPLC.
图形摘要摘要将多种腈还原为醛亚胺的二异丁基铝盐,向其中加入亚磷酸二异丙酯。相应的 1-氨基膦酸酯被脱保护得到外消旋 1-氨基膦酸或与 Boc2O 反应生成 N-Boc 保护的 1-氨基膦酸酯。2-苄硫基-1-(叔丁氧基羰基氨基)丙基膦酸酯的对映异构体通过手性HPLC从外消旋体获得并转化为(R)-和(S)-高半胱氨酸、(R)-和(S)-的膦酸类似物2-氨基丁酸和(S)-甲硫氨酸,通过手性HPLC测定,所有ee>97%。