申请人:Penick Corporation
公开号:US06013796A1
公开(公告)日:2000-01-11
For the synthesis of 3-methylnaltrexone from codeine in this invention, codeine is converted to 6-acetylcodeine, which is N-demethylated to 6-acetylcodeine hydrochloride, followed by alkylating the nitrogen to form 17-cyclopropylmethylnorcodeine. The latter is oxidized to 17-cyclopropylmethylnorcodeinone. For the synthesis of naltrexone from morphine in this invention, morphine is converted to 3-benzylnormorphine as described above in the synthesis of noroxymorphone. 3-Benzylnormorphine is reacted with cyclopropylmethyl halide to produce 3-benzyl-17cyclopropylmethylnormorphine, a novel compound, which is oxidized to 3-benzyl-17-cyclopropylmethyl-normorphinone, a novel compound, by Swern oxidation.
在本发明中,从可待因合成3-甲基纳曲酮的方法是将可待因转化为6-乙酰基可待因,然后进行N-去甲基化制备6-乙酰基可待因盐酸盐,接着烷基化氮原子以形成17-环丙基甲基诺可啡。后者被氧化为17-环丙基甲基诺可啡酮。从吗啡合成纳曲酮的方法是将吗啡转化为3-苄基诺莫啡,如上所述在合成诺洛酮吗啡中。3-苄基诺莫啡与环丙基甲基卤化物反应,生成3-苄基-17-环丙基甲基诺莫啡,这是一种新化合物,然后通过Swern氧化反应将其氧化为3-苄基-17-环丙基甲基-诺莫啡酮,这也是一种新化合物。