1982•Chemical and Pharmaceutical BulletinOpen access

Structure of menisporphine: A new type of isoquinoline alkaloid.

Jun‐ichi Kunitomo, Miyoko Satoh

Abstract

The structure of an unknown yellow base from Menisperum dauricum DC. (Menispermaceae) was determined to be 5, 6, 9-trimethoxy-7H-dibenzo [de, h] quinolin-7-one (1) by spectral data and total synthesis. It was named menisporphine and the skeletal name"oxoisoaporphine"was proposed for this new type of alkaloid. The biosynthesis route of oxoisoaporphine-type alkaloids in plants is suggested.

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Key concepts: Menispermaceae, Isoquinoline, Alkaloid, Chemistry, Stereochemistry