The present invention relates to the preparation of novel rheadan-type alkaloids and to novel intermediates useful in the preparation thereof. The process utilizes as starting materials a known class of alkaloids of the narcotine or of the hydrastine type. Certain of the said novel intermediates are also pharmaceutically useful in and of themselves. Additionally, certain of the novel intermediates can be converted into other type alkaloids which are also pharmaceutically useful.
本发明涉及制备新型莱达碱类
生物碱及其制备中有用的新型中间体。该过程利用一种已知的纳尔科汀或
金缕梅碱类
生物碱作为起始材料。其中某些新型中间体本身也具有药用价值。此外,某些新型中间体可以转化为其他类型的
生物碱,这些
生物碱也具有药用价值。