Enantiomers of Diastereomeric cis-N-[1-(2-Hydroxy-2-phenylethyl)-3-methyl-4-piperidyl]-N-phenylpropanamides: Synthesis, X-ray Analysis, and Biological Activities
作者:George A. Brine、Peter A. Stark、Young Liu、F. Ivy Carroll、P. Singh、Heng Xu、Richard B. Rothman
DOI:10.1021/jm00009a015
日期:1995.4
(+/-)-cis-N-[1-(2-Hydroxy-2-phenylethyl)-3-methyl-4-piperidyl]-N- phenylpropanamide (1) is a mixture of four stereoisomers [(2S,3R,4S)-1a, (2R,3R,4S)-1b, (2R,3S,4R)-1c, and (2S,3S,4R)-1d], which together constitute two diastereoisomeric pairs of optical isomers. These four stereoisomers were prepared from optically active intermediates of known absolute configuration by procedures which had no effect
(+/-)-顺-N- [1-(2-羟基-2-苯基乙基)-3-甲基-4-哌啶基] -N-苯基丙酰胺(1)是四种立体异构体的混合物[(2S,3R, 4S)-1a,(2R,3R,4S)-1b,(2R,3S,4R)-1c和(2S,3S,4R)-1d]一起构成光学异构体的两个非对映异构体对。这四种立体异构体由已知绝对构型的旋光中间体通过不影响哌啶3-和4-碳构型的方法制备。通过(2S,3S,4R)-1d的X射线分析确定最终产物中苯乙基2-碳的构型。最终产物与奥芬太尼的1 H NMR比较表明,以前称为奥芬太尼的外消旋对是(2S,3R,4S)-1a和(2R,3S,4R)-1c的混合物。1a,1b,1c,在各种结合和药理分析中评估了1d和1d。结合数据表明,异构体1b和1c对以[3H] DAMGO标记的mu位点具有最高的亲和力和选择性。相反,这四个异构体以1a约1b> 1c约1d的顺序置换了[3H] et