Synthesis and Smooth Muscle Calcium Channel Antagonist Effects of Alkyl 1,4-Dihydro-2,6-dimethyl-4-(pyridinyl)-5-[2-(4,5-dihydro-4,4-dimethyloxazolin-2-yl)]-3-pyridinecarboxylates
作者:Raymond D. Anana、Edward E. Knaus
DOI:10.1002/ardp.19963290807
日期:——
vitro calcium channel antagonist activity was determined by using the guinea pig ileum longitudinal smooth muscle (GPILSM) assay. Compared to the reference drug nifedipine (IC50 = 1.43 × 10−8 M), the title compounds 11 exhibited weak calcium channel antagonist activity (10−5 to 10−6 M range). A comparison of compounds 11 having a C‐4 3‐pyridinyl substituent showed that with respect to the alkyl ester
一组外消旋烷基1,4-二氢-2,6-二甲基-4-(3-或4-吡啶基)-5-[2-(4,5-二氢-4,4-二甲基恶唑啉-2-基) ] -3 - 吡啶羧酸盐 11a - e 是通过使用 Hantzsch 反应制备的,该反应涉及 Knoevenagel 加合物 9a - e 与 1- [2- (4,5 - 二氢 - 4,4 - 二甲基恶唑啉 - 2 - 基)] - 1 -Propen-2-amines (10)。相反,4-(2-吡啶基)类似物11f是通过亚硫酰氯介导的16的5-N-(1,1-二甲基-2-羟乙基)氨基羰基}部分环化到5-[2- (4,5-二氢-4,4-二甲基恶唑啉-2-基)]环系统(11f)。通过使用豚鼠回肠纵向平滑肌 (GPILSM) 测定法测定体外钙通道拮抗剂活性。与参考药物硝苯地平 (IC50 = 1.43 × 10-8 M) 相比,标题化合物 11 表现出较弱的钙通道拮抗剂活性