title: Inhibition of neutrophil O(2)(-) production by unsymmetrical methylene derivatives of benzopyrans: their use as potential antiinflammatory agents.
abstract: Some unsymmetrical derivatives of benzopyrans 9 were synthesized and tested to verify their PKC inhibitory activity. For this purpose, the Mannich bases of 7-hydroxycoumarins 6 were treated with 2-(dialkylamino)benzopyran-4-ones or 3-(dialkylamino)naphtho[2,1-b]pyran-1-ones 8 in the presence of acetic or propionic anhydride, yielding compounds 9. Human neutrophils stimulated with either PMA and f-MLF were used as the cellular model. The efficiency of the compounds 9 was established on their capacity to reduce the O(2)(-) production by activated human neutrophils. Compounds 9d and 9f, bearing an acetoxy group in position 7 of the chromone moiety, seem to counteract the neutrophil activation efficiently.
authors.affiliation: Dipartimento di Scienze Farmaceutiche, Viale Benedetto XV, 3-16132 Genova, Italy. mazzei@cba.unige.it
authors.forename: M
authors.initials: M
authors.lastname: Mazzei
authors.forename: R
authors.initials: R
authors.lastname: Dondero
authors.forename: E
authors.initials: E
authors.lastname: Sottofattori
authors.forename: E
authors.initials: E
authors.lastname: Melloni
authors.forename: R
authors.initials: R
authors.lastname: Minafra
mesh_terms: D000893:Anti-Inflammatory Agents / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology; D001578:Benzopyrans / Q000138:chemical synthesis / Q000737:chemistry / Q000494:pharmacology; D002867:Chromones / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology; D006801:Humans; D009240:N-Formylmethionine Leucyl-Phenylalanine / Q000494:pharmacology; D009281:Naphthalenes / Q000138:chemical synthesis / Q000737:chemistry / Q000494:pharmacology; D009504:Neutrophils / Q000187:drug effects* / Q000378:metabolism; D017382:Reactive Oxygen Species / Q000378:metabolism; D013329:Structure-Activity Relationship; D013755:Tetradecanoylphorbol Acetate / Q000494:pharmacology
chemical_list: D000893:Anti-Inflammatory Agents; D001578:Benzopyrans; D002867:Chromones; D009281:Naphthalenes; D017382:Reactive Oxygen Species; D009240:N-Formylmethionine Leucyl-Phenylalanine; D013755:Tetradecanoylphorbol Acetate