Stereoselectivity of a potent calcium antagonist, 1-benzyl-3-pyrrolidinyl methyl 2,6-dimethyl-4-(m-nitrophenyl)-1,4-dihydropyridine-3,5-dicarboxylate
作者:Kazuharu Tamazawa、Hideki Arima、Tadao Kojima、Yasuo Isomura、Minoru Okada、Shigeo Fujita、Toshio Furuya、Toichi Takenaka、Osamu Inagaki、Michio Terai
DOI:10.1021/jm00162a013
日期:1986.12
study on 3a X HBr as well as 3a X HCl. The configuration of 1a corresponds to R, and the other enantiomers of 3 were respectively determined by chemical correlation. The potency order of the four enantiomers was (S,S)-3a greater than (S,R)-3b greater than (R,R)-3d greater than (R,S)-3c. Latent chiral characters of nifedipine derivatives with the identical ester groups were assigned by comparison of their
通过(-)-或(+)-5-(甲氧基羰基)-2,6-二甲基-4-(m)的反应合成了标题化合物的四种对映体(3a-d),YM-09730(3)。 -(硝基苯基)-1,4-二氢吡啶-3-羧酸(1a或1b)与(S)-或(R)-1-苄基-3-吡咯烷醇(2a或2b)。评估了这些化合物的[3H]硝苯地平结合亲和力和冠脉舒张活性。通过X射线晶体学研究明确地确定了持续时间最长的最强对映体(3a)的绝对构型为(S)-1,4-二氢吡啶-C4和(S)-吡咯烷-C3(S,S)用3a X HBr以及3a X HCl萃取。1a的构型对应于R,并且3的其他对映体分别通过化学相关性确定。四种对映异构体的效能顺序为(S,S)-3a大于(S,R)-3b大于(R,R)-3d大于(R,S)-3c。通过比较其1,4-二氢吡啶(DHP)环的褶皱模式与在3a X HCl或3a X HBr中发现的褶皱模式,来确定具有相同酯基的硝苯地平衍生