products thus obtained with methyl β-aminocrotonate (3). The structures of products 4 were characterized by spectal data. Positive inotropic activities were observed on electrically stimulated, left atria of giunea pigs and these effects could be attributed to calcium agonism. On the other hand, barium chloride-induced contractions of guinea pig ileum were inhibited in a dose-dependent manner.
通过1,3-
茚满二酮(1)与芳族醛2a-g的Knoevenagel反应,然后使由此获得的产物与
β-氨基巴豆酸甲酯(3)环化迈克尔加成反应,制备标题化合物4a-g。产品4的结构通过光谱数据表征。在电刺激的Giunea猪左心房中观察到正性肌力活动,这些作用可能归因于
钙激动作用。另一方面,
氯化钡诱导的豚鼠回肠收缩以剂量依赖性方式被抑制。