In the course of systematic studies on sila-substituted drugs the nifedipine-like 1.4-dihydropyridine derivatives 4a, 4b and 4c were prepared and investigated with respect to sila-substitution effects. By X-ray diffraction analyses 4a, 4b and 4c were found to be isostructural. The C/Si-analogues exhibit similar spasmolytic activities (in vitro, guinea pig ileum), comparable with that of nifedipine
在对 sila 取代药物的系统研究过程中,制备了类似
硝苯地平的 1.4-二氢
吡啶衍生物 4a、4b 和 4c,并研究了 sila 取代效应。通过 X 射线衍射分析发现 4a、4b 和 4c 是同构的。C/Si 类似物表现出与
硝苯地平相似的解痉活性(体外,豚鼠回肠)。然而,如通过对肾性高血压大鼠的抗高血压作用所测量的,这些化合物的体内活性显着不同。关于碳/
硅交换讨论了实验结果。