申请人:Rishel Michael James
公开号:US20080306269A1
公开(公告)日:2008-12-11
A method of preparing a tetrabenazine compound (TBZ compound) having structure I comprising the steps of reacting a nucleophilic alkenyl species with aldehyde compound II and oxidizing the resultant allylic alcohol to provide enone III. The protecting group P
1
on the tetrahydroisoquinoline nitrogen is removed and the resultant deprotected intermediate is induced to undergo an amino cyclization reaction to provide a product TBZ compound having structure I. The method may be used to prepare either enantiomeric form of tetrabenazine; (+)-tetrabenazine or (−)-tetrabenazine. Alternatively the method may be adapted to provide a mixture enriched in one tetrabenazine enantiomer, a racemic mixture, or a diastereomeric mixture of tetrabenazine compounds. In addition, the present invention provides novel synthetic intermediate compositions which may be used to prepare either or both enantiomers of tetrabenazine, derivatives of tetrabenazine, and analogs of tetrabenazine.
一种制备结构I的四苯异赭曲嗪化合物(TBZ化合物)的方法,包括以下步骤:将亲核烯基物种与醛化合物II反应,并氧化所得的烯丙醇以提供烯酮III。去除四氢异喹啉氮上的保护基P1,并使去保护的中间体发生氨基环化反应,以提供具有结构I的产品TBZ化合物。该方法可用于制备四苯异赭曲嗪的任一对映体形式;(+)-四苯异赭曲嗪或(-)-四苯异赭曲嗪。另外,该方法可被改进以提供富含一种四苯异赭曲嗪对映体的混合物、外消旋混合物或四苯异赭曲嗪化合物的非对映异构体混合物。此外,本发明提供了可用于制备四苯异赭曲嗪的任一或两种对映体、四苯异赭曲嗪衍生物和四苯异赭曲嗪类似物的新型合成中间体组合物。