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
Synthesis of unsymmetrical methylene derivatives of benzopyran-4-ones from mannich bases
作者:Mauro Mazzei、Ramona Dondero、Alessandro Balbi、Gian Maria Bonora
DOI:10.1002/jhet.5570380232
日期:2001.3
The formation of methylene-bis derivatives of benzopyran-4-ones from their Mannichbases was studied. On these grounds, unsymmetrical methylene derivatives have been synthesized by reacting Mannichbases of benzopyran-4-ones with structurally related compounds lacking the dialkylaminomethyl group.
A novel synthesis of 2-aminochromones via phosgeniminium salts
作者:Joel Morris、Donn G. Wishka、Yue Fang
DOI:10.1021/jo00050a025
日期:1992.11
A novel method for the synthesis of antiplatelet 2-aminochromones making use of the reaction of 2'-hydroxyacetophenone-BF2 Complexes with phosgeniminium chlorides has been developed. Aqueous hydrolysis of the intermediate beta-chlorovinylogous amide-BF2 complex affords the 2-aminochromone in good yield, without the need for chromatographic purification.
Kaye, Perry T.; Ramaite, Isaiah D.I., South African Journal of Chemistry, 2003, vol. 56, p. 25 - 29
作者:Kaye, Perry T.、Ramaite, Isaiah D.I.
DOI:——
日期:——
Synthesis of new 3,5-disubstituted isoxazoles with specific anti-group B rhinovirus activity in vitro
作者:M Mazzei、A Balbi、E Sottofattori、R Garzoglio、A De Montis、S Corrias、P La Colla
DOI:10.1016/0223-5234(93)90025-a
日期:1993.1
3,5-Disubstituted isoxazoles 4a-f were synthesized as potential anti-rhinovirus agents. These compounds were prepared in good yield by treatment of the corresponding 2-(dialkylamino)chromones 3a-f with hydroxylamine. Compounds 4 were demethylated to obtain dihydroxyderivatives 5, which were then transformed in acetyl-6 and alkylderivatives 7. The methylenbisderivatives 9 were obtained by reaction of bischromones 8 with hydroxylamine. Most compounds were subjected to antiviral screening. Compounds 4c, 7a, 7b and 7c were found to be specific inhibitors of group B rhinoviruses.