Journal of Medicinal Chemistry p. 1452 - 1457 (1986)
Update date:2022-07-29
Topics:
Dionne, Gervais
Humber, Leslie G.
Asselin, Andre
McQuillan, Juanita
Treasurywala, Adi M.
The syntheses of N,N-dimethyl-6,7,8,9-tetrahydro-3H,10H-pyrrolo<3,2-a>carbazol-7-amine (8), N,N-dimethyl-7,8,9,10-tetrahydro-11H-pyrido<3,2-a>carbazol-8-amine (9a), and the N,N,11-trimethyl analogue (9b) are described.The in vitro inotropic activity of these compounds, as well as the known cardiotonics amrinone and 7-hydroxycyclindole (7), was investigated.Compound 8, a pyrrolo analogue of 7, was devoid of inotropic activity, while the pyrido analogues 9 were equiactive to 7 and amrinone.These results suggest that the hydroxyl group of 7 functions as an H-bondacceptor, rather than a donor, and that on interaction of 7, and the pyrido analogues 9, with a common receptor, an orbital occupied by one of the oxygen lone pair electrons of 7 must assume the same orientation as the orbital occupied by the pyridine nitrogen lone pair.
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