Resolution and Absolute Stereochemistry of 6,7-Dimethoxy-4-phenyl-1,2,3,4-tetrahydroisoquinoline. The Crystal Structure of the R-Hydrochloride Salt Form.
作者:Diana Mondeshka、Ivanka Angelova、Birgitta Stensland、Per-Erik Werner、Chavdor Ivanov、Daniel R. Carcanague、Ito Chao、K. N. Houk
DOI:10.3891/acta.chem.scand.46-0054
日期:——
4-tetrahydroisoquinoline (3) has been achieved from its racemic base. The absolute configurations of the optical antipodes converted into their hydrochloride salt forms have been determined by X-ray diffractometric analysis, thus permitting assignment of the antipodes as the (+)-(4R)-3 and (-)-(4S)-3 enantiomers. The crystal structures of the two enantiomers are related as mirror images and only the (4R)-3
从其外消旋基础上已经实现了立体定向多步合成和拆分6,7-二甲氧基-4-苯基-1,2,3,4-四氢异喹啉(3)。已经通过X射线衍射分析确定了转化为盐酸盐形式的光学对映体的绝对构型,因此可以将对映体分配为(+)-(4R)-3和(-)-(4S)-3对映体。两种对映异构体的晶体结构以镜像关系关联,并且只有(4R)-3.HCl形式已通过三维X射线衍射完全确定。在固态下,两个甲氧基的碳原子略微偏离苯环平面,手性取向的苯基取代基几乎垂直地倾斜,脱离了与异喹啉系统的结合。在几个对5-HT,NE和DA摄取抑制活性的生化测试中,对映体的检测显示,对(4S)-对映体的排他性偏爱。这些结果与先前的建议一致,即4-苯基取代基的S-构型状态对生物活性很重要。