酸漿根のアルカロイド研究(第2報)
1974 年 94 巻 9 号 p. 1115-1122
詳細
1974 年 94 巻 9 号 p. 1115-1122
Five kinds of alkaloids were isolated from the root of Physalis alkekengi L.var.francheti HORT. forma bunyardii MAKINO besides 3α-tigloyloxytropane (I) which was formerly isolated.1) Alkaloids II, III, and IV were determined as tigloidine (II), tropine (III), and pseudotropide (IV). The structure of alkaloid V was confirmed as 3α-tigloyloxytropane N-oxide by both chemical reaction and synthesis. This N-oxide-type alkaloid has been unknown in natural tropane alkaloids. Alkaloid VI could not be clarified due to its small amount. A convenient synthetic method for nortropine from tropine N-oxide was also established.
