Synthesis and Biological Activities of Optical Isomers of 2-(4-Diphenylmethl-1-piperazinly)ethyl 5-(4,6-Dimethyl-2-oxo-1,3,2-dioxaphosphorinan-2-yl)-1,4-dihydro-2,6-dimethyl-4-(3-nitrophenyl)-3-pyridinecarboxylate Dihydrochloride(NIP-101).
作者:Ryozo SAKODA、Yoshimasa KAMIKAWAJI、Kiyotomo SETO
DOI:10.1248/cpb.40.2370
日期:——
Six optical isomers of 2-(4-diphenylmethyl-1-piperaziyl)ethyl 5-(4, 6-dimethyl-2-oxo-1, 3, 2-dioxaphosphorinan-2-yl)-1, 4-dihydro-2, 6-dimethyl-4-(3-mitrophenyl)-3-pyridinecarboxylate dihydrochloride (NIP-101, 1·2HCl·2H2O), a potent calcium antagonist, were successfully prepared by using optically active (2R, 4R)-(-)- and (2S, 4S)-(+)-2, 4-pentanediols, and cis-2, 4-pentanediol and optically active (S)-(+)-2-methoxy-2-pheylethanol. Their proton nuclear magnetic resonance investigations demonstrate that the 1, 3, 2-dioxaphosphorinane group in conformationally constrained around the C-P bond. Calcium-antagonistic and hypotensive activities of the optical isomers were examined and found to depend mainly on the absoeute configuration at a stereogenic center in the 1, 4-dihydrophridine ring rather than the configuration of the 1, 3, 2-dioxaphospyorinane moiety.
通过使用光学活性(2R,4R)-(-)-和(2S,4S)-(+)-2,4-戊二醇和顺式-2,4-戊二醇以及光学活性(S)-(+)-2-甲氧基-2-苯基乙醇,成功地制备了六种光学异构体,即2-(4-二苯甲基-1-哌嗪基)乙基5-(4,6-二甲基-2-氧代-1,3,2-二氧杂磷杂环己烷-2-基)-1,4-二氢-2,6-二甲基-4-(3-间苯基)-3-吡啶羧酸盐二盐酸盐(NIP-101,1·2HCl·2H2O),这是一种有效的钙拮抗剂。其质子核磁共振研究表明,1,3,2-二氧杂磷杂环己烷基团在构象上受C-P键的限制。对光学异构体的钙拮抗和降压活性进行了研究,发现它们主要取决于1,4-二氢吡啶环中立体中心处的绝对构型,而不是1,3,2-二氧杂磷杂环己烷基团的构型。