(−)-8a-epi-Swainsonine (4), one of the stereocongeners of physiologically interesting indolizidine alkaloid (−)-swainsonine (1), has been synthesized starting from known methyl 3-azido-4,6-O-benzylidene-3-deoxy-α-d-altropyranoside. The α-d-mannosidase inhibitory activity of 4 was compared with natural 1.
从已知的
甲基 3-
叠氮-4,6-O-亚
苄基-3-
脱氧-α-d-丙
吡喃糖苷开始,合成了(-)-8a-epi-蛇床子碱(4),它是生理上有趣的
吲哚利嗪
生物碱(-)-蛇床子碱(1)的立体异构体之一。将 4 的 α-d-mannosidase 抑制活性与
天然 1 进行了比较。