Metcalf S K, Holt E M
Department of Chemistry, Oklahoma State University, Stillwater, Oklahoma 74078, USA.
Acta Crystallogr C. 2000 Oct;56 ( Pt 10):1228-31. doi: 10.1107/s0108270100008416.
Diethyl 4-(2,5-dimethoxyphenyl)-2,6-dimethyl-1,4-dihydropyridine-3, 5-dicarboxylate, C(21)H(27)NO(6), (I), diethyl 4-(3, 4-dimethoxyphenyl)-2,6-dimethyl-1,4-dihydropyridine-3, 5-dicarboxylate, C(21)H(27)NO(6), (II), and diethyl 2, 6-dimethyl-4-(3,4,5-trimethoxyphenyl)-1,4-dihydropyridine-3, 5-dicarboxylate, C(22)H(29)NO(7), (III), crystallize with hydrogen-bonding networks involving the H atom bonded to the N atom of the 1,4-dihydropyridine ring and carbonyl O atoms in (I) and (II). Unusually, (III) shows O atoms of methoxy groups serving as hydrogen-bond acceptors.
4-(2,5-二甲氧基苯基)-2,6-二甲基-1,4-二氢吡啶-3,5-二羧酸二乙酯，C(21)H(27)NO(6)，(I)；4-(3,4-二甲氧基苯基)-2,6-二甲基-1,4-二氢吡啶-3,5-二羧酸二乙酯，C(21)H(27)NO(6)，(II)；以及2,6-二甲基-4-(3,4,5-三甲氧基苯基)-1,4-二氢吡啶-3,5-二羧酸二乙酯，C(22)H(29)NO(7)，(III)，通过氢键网络结晶，其中涉及与1,4-二氢吡啶环的N原子相连的H原子以及(I)和(II)中的羰基O原子。不同寻常的是，(III)中显示甲氧基的O原子作为氢键受体。
