申请人:Procos S.P.A.
公开号:US11286254B2
公开(公告)日:2022-03-29
The present invention discloses a process for the preparation of 2-benzhydryl-3-quinuclidinone (1). (I). The process of the invention allows to obtain the intermediate 2-benzhydryl-3-quinuclidinone (1) by reaction of 2-benzylidene-3-quinuclidinone (2) with the Grignard reagent phenyl-magnesium halide, in particular chloride or bromide, in the presence of catalytic amounts of copper (I) salts. Taking advantage of the high efficiency of the catalytic system of the copper (I) salts, 2-benzhydryl-3-quinuclidinone (1) is obtained in higher yields than those of the known processes. Advantageously, since the amounts of copper (I) salts are catalytic, the latter can easily be removed from the reaction mixture, and the process is carried out in the presence of solvents less toxic and expensive than those used in the state of the art.
本发明公开了一种制备2-双苯甲基-3-喹诺里西啶酮(1)的方法。(I)。本发明的方法允许通过将2-苯甲酰基-3-喹诺里西啶酮(2)与格氏试剂苯基镁卤化物反应,特别是在铜(I)盐催化量的存在下,获得中间体2-双苯甲基-3-喹诺里西啶酮(1)。利用铜(I)盐催化系统的高效性,可获得比已知方法更高的产率的2-双苯甲基-3-喹诺里西啶酮(1)。而且,由于铜(I)盐的使用量是催化量,它们可以很容易地从反应混合物中去除,并且该过程在毒性较低、成本较低的溶剂存在下进行,与现有技术中使用的溶剂相比。