A concise enantioselective synthesis of N-morpholinosphingosines from D-aspartic acid
作者:Charles W. Jefford、James McNulty、Zhi-Hui Lu
DOI:10.1039/c39950000123
日期:——
D-Aspartic acid, by N-tosylation, anhydride formation, reduction, α-hydroxylation and iodo-esterification, gives ethyl (2R,3R)-3-[(N-tosyl)amino]-2-hydroxy-4-iodobutyrate which, by treatment with morpholine, silylation, DIBAH reduction, Wittig reaction and deprotection, gives the N-morpholinosphingosine 13 in an overall yield of 27%.
通过N-甲苯磺酰化、酸酐形成、还原、α-羟基化以及碘酯化步骤,D-天冬氨酸转化为乙基(2R,3R)-3-[(N-甲苯磺酰基)氨基]-2-羟基-4-碘丁酸酯。进一步通过与吗啉反应、硅烷化、DIBAH还原反应、Wittig反应以及去保护步骤处理后,得到N-吗啉基神经酰胺13,总体产率为27%。