title: New 4-amino-7,8-dimethoxy-5H-pyrimido[5,4-b]indole derivatives: synthesis and studies as inhibitors of phosphodiesterases.
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).
authors.affiliation: Centre of Investigation in Applied Pharmacobiology, University of Navarre, Pamplona, Spain.
authors.forename: A
authors.initials: A
authors.lastname: Monge
authors.forename: F J
authors.initials: FJ
authors.lastname: Martínez-Crespo
authors.forename: M A
authors.initials: MA
authors.lastname: Villanueva
authors.forename: M
authors.initials: M
authors.lastname: Font
authors.forename: E
authors.initials: E
authors.lastname: Santiago
authors.forename: J J
authors.initials: JJ
authors.lastname: Martínez de Irujo
authors.forename: E
authors.initials: E
authors.lastname: Alberdi
authors.forename: M J
authors.initials: MJ
authors.lastname: López-Unzu
authors.forename: E
authors.initials: E
authors.lastname: Cenarruzabeitia
authors.forename: E
authors.initials: E
authors.lastname: Castiella
mesh_terms: D000818:Animals; D002417:Cattle; D004285:Dogs; D005260:Female; D006168:Guinea Pigs; D006321:Heart / Q000187:drug effects; D006801:Humans; D066298:In Vitro Techniques; D007211:Indoles / Q000138:chemical synthesis* / Q000494:pharmacology; D008297:Male; D009131:Muscle, Smooth, Vascular / Q000187:drug effects; D010726:Phosphodiesterase Inhibitors / Q000138:chemical synthesis* / Q000494:pharmacology; D010975:Platelet Aggregation Inhibitors / Q000494:pharmacology; D011743:Pyrimidines / Q000138:chemical synthesis* / Q000494:pharmacology; D051381:Rats; D017208:Rats, Wistar; D014665:Vasodilator Agents / Q000138:chemical synthesis / Q000494:pharmacology
chemical_list: D007211:Indoles; D010726:Phosphodiesterase Inhibitors; D010975:Platelet Aggregation Inhibitors; D011743:Pyrimidines; D014665:Vasodilator Agents