Dihydropyridazinone cardiotonics: synthesis and inotropic activity of 5'-(1,4,5,6-tetrahydro-6-oxo-3-pyridazinyl)-spiro[cycloalkane-1,3'-[3H]indol]-2'(1'H)-ones
作者:David W. Robertson、Joseph H. Krushinski、G. Don Pollock、Harve Wilson、Raymond F. Kauffman、J. Scott Hayes
DOI:10.1021/jm00388a014
日期:1987.5
11 (5'-(1,4,5,6-tetrahydro-4-methyl-6-oxo-3-pyridazinyl)spiro[cyclopropane- 1,3'-[3H]indol]-2'(1'H)-one), the 4-methyl analogue of 10. This compound had an iv ED50 of 1.5 microgram/kg. Oral activity was evaluated by administering 50 micrograms/kg of 10 to conscious, chronically instrumented dogs. A 39% increase in LV dP/dt60 was observed, and an inotropic effect was demonstrable in excess of 7 h. Thus
在1,3-二氢-5-(1,4,5,6-四氢-6-氧代-3-吡啶并嗪基)-2H-吲哚-2-酮系列的强直性中,我们发现螺环烷基可以被退火保留吲哚酮活性的同时在吲哚酮部分的3位上 发现螺环烷基环的大小与正性肌力之间存在反比关系。静脉给予戊巴比妥麻醉的狗后,螺环丙烷10,螺环丁烷12和螺环戊烷13的ED50值分别为2.7、35和133微克/ kg。制备的最有效的化合物是11(5'-(1,4,5,6-四氢-4-甲基-6-氧代-3-吡啶并嗪基)螺[环丙烷-1,3'-[3H]吲哚] -2 '(1'H)-1),为10的4-甲基类似物。该化合物的iv ED50为1.5微克/千克。通过向意识清醒的人服用50微克/千克的10来评估口服活性,长期使用仪器的狗。观察到LV dP / dt60增加了39%,并且在超过7 h的时间里,显示出正性肌力作用。因此,螺环二氢哒嗪酮正性肌力药是有效的,长效的,口服有效的强心药。