Abstract
A series of 4-amino-7,8-dimethoxy-5H-pyrimido[5,4-b]indole derivatives has been synthesized. These compounds resemble carbazeram and other pyridazino compounds with activity in the cardiovascular system. Some of these new compounds possess inotropic activity (Table 2), with a complementary effect on the inhibition of different CGI-PDE (Table 3). The most active compounds 5, 6d, and 7 also possess activity as vasodilators (Table 4). Some of these new compounds inhibit blood platelet aggregation induced by ADP and AA and are active as inhibitors of human platelet PDEs (Tables 5 and 6).
MeSH terms
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Animals
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Cattle
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Dogs
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Female
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Guinea Pigs
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Heart / drug effects
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Humans
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In Vitro Techniques
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Indoles / chemical synthesis*
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Indoles / pharmacology
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Male
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Muscle, Smooth, Vascular / drug effects
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Phosphodiesterase Inhibitors / chemical synthesis*
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Phosphodiesterase Inhibitors / pharmacology
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Platelet Aggregation Inhibitors / pharmacology
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Pyrimidines / chemical synthesis*
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Pyrimidines / pharmacology
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Rats
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Rats, Wistar
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Vasodilator Agents / chemical synthesis
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Vasodilator Agents / pharmacology
Substances
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Indoles
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Phosphodiesterase Inhibitors
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Platelet Aggregation Inhibitors
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Pyrimidines
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Vasodilator Agents