申请人:——
公开号:US05234821A1
公开(公告)日:1993-08-10
A 1,4-dihydropyridine derivative represented by formula (I): ##STR1## wherein X represents an alkyl group, or a group of ##STR2## in which R.sub.1, R.sub.2, and R.sub.3 may be the same or different and each represent a hydrogen atom, a halogen atom, a nitro group, a nitrile group, or a trifluoromethyl group; R.sub.4 represents a substituted or unsubstituted acyloxymethyl group, an alkoxycarbonyloxymethyl group, a (2-oxo-1,3-dioxolen-4 -yl)methyl group, a (5-substituted-2-oxo-1,3-dioxolen-4 -yl)methyl group, or an acyl group; R.sub.5 represents a lower alkyl group or a substituted alkyl group; and R.sub.6 represents a hydrogen atom, a lower alkoxymethyl group, or a lower acyloxymethyl group, is disclosed. The compound is stereospecifically hydrolyzed by the action of an enzyme to provide an optically active 1,4-dihydro -3-pyridinemonocarboxylic acid which is useful as an intermediate of pharmaceuticals in good optical purity and yield.
公式(I)所表示的1,4-二氢吡啶衍生物:##STR1## 其中X表示烷基或##STR2## 中的一种,其中R.sub.1,R.sub.2和R.sub.3可以相同或不同,每个代表氢原子,卤素原子,硝基,腈基或三氟甲基基团; R.sub.4表示取代或未取代的酰氧甲基基团,烷氧羰氧甲基基团,(2-氧代-1,3-二氧杂环[4.4.0]癸-4-基)甲基基团,(5-取代-2-氧代-1,3-二氧杂环[4.4.0]癸-4-基)甲基基团或酰基基团; R.sub.5表示低烷基或取代烷基; R.sub.6表示氢原子,低烷氧甲基基团或低酰氧甲基基团。该化合物通过酶的作用立体特异性水解,提供有用的光学纯度和产率的1,4-二氢-3-吡啶羧酸,可用作药物中间体。