Syntheses of (−)-8-<i>epi</i>-Swainsonine and (−)-1,8-Di-<i>epi</i>-swainsonine, Stereoisomers of Physiologically Interesting Indolizidine Alkaloid, Swainsonine
作者:Kin-ichi Tadano、Youichi Iimura、Yukinori Hotta、Chiyoko Fukabori、Tetsuo Suami
DOI:10.1246/bcsj.59.3885
日期:1986.12
Two stereoisomers of the indolizidine alkaloid swainsonine, (−)-8-epi-swainsonine (2) and (−)-1,8-di-epi-swainsonine (3), have been synthesized from the known methyl 3-acetamido-2-O-acetyl-4,6-O-benzylidene-3-deoxy-α-D-glucopyranoside and methyl 3-acetamido-2-O-acetyl-3-deoxy-4,6-di-O-mesyl-α-D-glucopyranoside (14), respectively. The key pyrrolidine ring formation was achieved by intramolecular cyclization
已经从已知的甲基 3-乙酰氨基-2 合成了吲哚里西啶生物碱 swainsonine 的两种立体异构体,(-)-8-epi-swainsonine (2) 和 (-)-1,8-di-epi-swainsonine (3) -O-acetyl-4,6-O-benzylidene-3-deoxy-α-D-glucopyranoside 和methyl 3-acetamido-2-O-acetyl-3-deoxy-4,6-di-O-mesyl-α-分别为 D-吡喃葡萄糖苷 (14)。关键的吡咯烷环形成是通过 6-O-甲苯磺酰基衍生物或二-O-甲磺酰基衍生物 14 的分子内环化有效实现的。还评估了合成 2 和 3 的 α-甘露糖苷酶抑制活性。