抄録
Structure of stepinonine (1a), isolated from Stephania japonica MIERS grown in Formosa, was established through the reductive fission (Chart 2) of N, O-dimethyltetrahydrostepinonine (4) with sodium in liquid ammonia, oxidation of O-ethyl-N-methyltetrahydrostepinonine (16) with KMnO4 (Chart 5), and the reductive fission of the deuterated product (18) derived from stepinonine (Chart 6). Syntheses of the 3-benzazepine derivatives, (15 a, b, c) and mass spectrometric fragmentation of these compounds were also presented.
