The present invention describes recovery and racemization of (1R)-Phenyl- 1,2,3,4-tetrahydroisoquinoline of compound of formula (III) to obtain racemic 1- phenyl-1, 2,3,4-tetrahydroisoquinoline of compound of formula (I) and its further resolution to get ( IS)-1-phenyl-1, 2, 3, 4-tetrahydroisoquinoline (intermediate B) in high chemical and chiral purity, which is the key intermediate for the preparation of (3R)-azabicyclo[2.2.2]oct-3-yl (1S)-1-phenyl-3,4-dihydroisoquinoline-2-(1H)- carboxylate.
本发明描述了将化合物的(1R)-苯基-1,2,3,4-
四氢异喹啉(III式化合物)进行回收和外消旋,以获得光学异构体
1-苯基-1,2,3,4-四氢异喹啉(I式化合物),并进一步对其进行分离,得到高
化学和手性纯度的(1S)-
1-苯基-1,2,3,4-四氢异喹啉(中间体B),这是制备(3R)-
氮杂双环[2.2.2]辛-3-基(1S)-
1-苯基-3,4-二氢异喹啉-2-(1H)-
羧酸酯的关键中间体。