(R)-phenylglycinol-derived oxazolopiperidone lactams 1–14 were converted to linear-chain enantiopure amino diols 15–26 by reduction with LiNH2BH3 in an unprecedented process involving the simultaneous reductive opening of the oxazolidine and lactam rings. Subsequent removal of the phenylethanol moiety gave enantiopure 5-amino-1-pentanols bearing substituents at the 2-, 3-, 4-, 2,2-, 2,3- 2,4- and 3,4-positions
各种 (R)-苯基甘
氨醇衍生的
恶唑哌啶酮内酰胺 1-14 通过用 LiNH2BH3 在前所未有的过程中还原转化为线性对映纯
氨基二醇 15-26,该过程涉及同时还原打开
恶唑烷和内酰胺环。随后去除苯基
乙醇部分得到对映纯的
5-氨基-1-戊醇,其在 2-、3-、4-、2,2-、2,3- 2,4- 和 3,4- 位(28- 36),它们被分离为它们的 N-Boc 衍
生物。