title: Regioselective synthesis of pyrazolo[4,5-g]pyrido[1,2-a]benzimidazoles: cytotoxic derivatives of pyrido[1,2-a]benzimidazolic ring system.
abstract: N-1 and N-2 substituted pyrazolo[4,5-g]pyrido[1,2-a]benzimidazoles were prepared regioselectively, and cytotoxicities evaluated in vitro against K562 and HL60 cells. All compounds displayed weaker activity than doxorubicin against sensitive lines, but showed the same activity against resistant cell lines (multidrug resistance+, (MDR+); K562R and HL60R) indicating no resistance phenomena.
authors.affiliation: Laboratoire de Chimie Organique Pharmaceutique, Faculté de Pharmacie, Montpellier, France.
authors.forename: M
authors.initials: M
authors.lastname: Dupuy
authors.forename: F
authors.initials: F
authors.lastname: Pinguet
authors.forename: Y
authors.initials: Y
authors.lastname: Blache
authors.forename: O
authors.initials: O
authors.lastname: Chavignon
authors.forename: J C
authors.initials: JC
authors.lastname: Teulade
authors.forename: J P
authors.initials: JP
authors.lastname: Chapat
mesh_terms: D000903:Antibiotics, Antineoplastic / Q000494:pharmacology; D000970:Antineoplastic Agents / Q000138:chemical synthesis* / Q000494:pharmacology; D001562:Benzimidazoles / Q000138:chemical synthesis* / Q000494:pharmacology; D004317:Doxorubicin / Q000494:pharmacology; D018922:HL-60 Cells; D006801:Humans; D020014:K562 Cells; D009682:Magnetic Resonance Spectroscopy; D014407:Tumor Cells, Cultured
chemical_list: D000903:Antibiotics, Antineoplastic; D000970:Antineoplastic Agents; D001562:Benzimidazoles; D004317:Doxorubicin