Aconitum-Alkaloids (第16報)

各地産のトリカブト植物塩基 その9

抄録

The aconite (Ochiai Specimen No.25) collected around Ashio, Kyoto Prefecture, was found to contain hypognavine and Ashio-base I (m.p. 142-145°; [α]_D²⁸: -5.45°; C₂₄H_37-39 O₅N, with 3 OCH₃, 1 NCH₃ (or NC₂H₅)). It also contained a minute amount of a base occurring as prismatic crystals of m.p. 294-296° (decomp.) and a small amount of the following bases: Kajigamori-base, Katsuyama-base II, Ashio-base II (hydrobromide, m.p. 333° (decomp.); [α]_D¹⁹: +97.69°; C₂₉H₃₃O₆N⋅HBr; infrared spectrum suggests BzO-, AcO-, and >C=CH₂ groups), Ashio-base III (m. p. 310-313° (decomp.); [α]_D⁸:+48.04°; C₂₇H₃₁O₆N⋅1/2H₂O; its infrared spectrum suggests the presence of OH and BzO-groups), and Hanamiyama-base (m.p. 246-247°; [α]_D²⁸: +120.6°; its infrared and ultraviolet spectra suggest the presence of a BzO- group.