27 高等植物にふくまれる新ジベレリン類の化学

概要

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(1) Presence of gibberellin A_3 in immature seeds of morning glory (Pharbitis nil) was established by means of thin layer chromatography after several purification steps. Another active principle in the seeds was isolated in crystalline form as its methyl ester, m.p. 181°, which was tentatively named Pharbitis Gibberellin. Molecular formula, C_<20>H_<26>O_5, was assigned to the methyl ester on the basis of high resolution mass spectrum. Structure IV was established by comparison of NMR spectra measured in CDCl_3 and in pyridine and finally by chemical conversion to tetrahydrogibberellin A_5 methyl ester. (2) Two new gibberellins were isolated in crystalline forms from immature seeds of horse bean (Canavalia gladiata DC), which show typical gibberellin activity to dwarf maize and tentatively named Canavalia Gibberellin-I and -II. Structure V and VI were proposed to Canavalia Gibberellin-I and II respectively, from consideration of high resolution mass spectra and NMR spectra.
天然有機化合物討論会の論文
1966-09-15