12 Lycoricidinol,Lycoricidine : ヒガンバナ鱗茎中の新植物生長調整物貭

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Methanol extract of the bulbs of Lycoris radiata Herb. has strong growth-inhibiting actions on Avena straight growth test and rice seedling test. The methanol extract was purified and two plant growth inhibitors, lycoricidinol and lycoricidine, were isolated. In this paper we wish to report the establishment of the structures. Lycoricidinol, C_<14>H_<13>O_7N, has a cheleted phenolic hydroxy group, a methylenedioxy group, a tri-substituted double bond conjugated with an aromatic ring system, three vicinal hydroxy groups and an amidic group. Lycoricidine, C_<14>H_<13>O_6N, has same functional groups as lycorici dinol without a phenolic hydroxy group. When lycoricidine and lycoricidinol are treated with methanolic hydrochloric acid, arolycoricidine and arolycoricidinol are respectively obtained, eliminating two molecules of water. And arolycoricidine derivative is identical with the authentic sample obtained from Pschorr cyclization of 12 in IR spectrum, TLC and mixed melting point. Thus the structure of arolycoricidine was definitely established. To satisly the above deta, the structures of lycoricidine and lycoricidinol must be expressed by the formulae 2 and 1, respectively.
天然有機化合物討論会の論文
1968-09-20