ベルベリン型アルカロイド誘導体の研究(第5報) : Tetrahydroberberineメチン塩基塩酸塩の熱分解について
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概要
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In order to carry out the conversion of protoberberine-type alkaloids to benzo[c]phenanthridine-type alkaloids by a synthetic means, thermal decomposition of the hydrochloride of tetrahydroberberine methine base (I) was carried out and hitherto unknown bases were obtained; base A of rap 168° and base B of mp 156°. By decomposition reaction, these two bases were identified as stereoisomers of 1,2-(3,4-methylenedioxyphenyl)-3-methyl-6,7-(2,3-dimethoxyphenyl)indolizidine (III). From the results of infrared and nuclear magnetic resonance (NMR) spectra, steric structures III A and III B were respectively assigned to bases A and B.
- 公益社団法人日本薬学会の論文
- 1970-08-25
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