Synthesis of 6, 14-ethenoisomorphinans and 6, 14-ethenomorphinans based on Diels-Alder adducts of 6-demethoxythebaine and 6-demethoxy-β-dihydrothebaine; pharmacology of the isomorphinans (Chemistry of Opium Alkaloids, Part XIX)
作者:P. R. Crabbendam、T. S. Lie、J. T. M. Linders、L. Maat
DOI:10.1002/recl.19841031005
日期:——
Two different types of Diels-Alder additions to morphinan-6, 8-dienes have been found. 6-Demethoxythebaine (2) yielded ethyl 4, 5α-epoxy-3-methoxy-N-methyl-6, 14-ethenoisomorphinan–7α-carboxylate (3) with ethyl acrylate, in analogy to the reaction with thebaine. The ester 3 was converted into the alcohol 4, of which the 3-methoxy ether was hydrolyzed to yield 5. Similarly, 2 gave the 7α-acetyl-6,
已经发现了吗啡喃-6、8-二烯的两种不同类型的Diels-Alder添加物。6- Demethoxythebaine(2),得到4-,5α环氧-3-甲氧基ñ -甲基- 6,14-ethenoisomorphinan-7α羧酸酯(3)与丙烯酸乙酯,类似于与蒂巴因反应。酯3被转化为醇4,其中3-甲氧基醚被水解以产生5。类似地,2给出具有甲基乙烯基酮的7α-乙酰基-6,14-亚乙基异吗啡喃7。使用甲基碘化镁将后一化合物转化为4。含溴化丙基镁7提供了四种化合物;两个是新的依托啡啡类似物(8和9),我们能够为其分配绝对构型;另外两个是格利雅减量产品10和11。