Karen.Khachatryan.com

The synthesis of 4-aryl-1H-pyrazolo [3, 4-b] quinolines by cyclization of 4-arylidenepyrazolin-5-ones with anilines

Abstract In the reaction of anilines with 4-(benzylidene)-1, 3-disubstituted pyrazol-5-ones, 1H-pyrazolo [3, 4-b] quinolines were formed instead of anticipated 5-phenylimino derivatives. The same compounds were also available from the reaction of pyrazolin-5-ones with Schiff bases. In spite of moderate yields both methods present a facile route to 4-aryl-1H-pyrazolo [3, 4-b] quinolines. These methods have advantages over the Friedländercyclization commonly utilized for preparation of 4-aryl-1H-pyrazolo [3, 4-b] quinolines. Thus, preparation of 2-aminobenzophenones, reagents indispensable in Friedlaender synthesis, can be avoided.

Keywords: 1H-Pyrazolo[3,4-b]quinolines, luminophores, pyrazolin-5-ones

Full text pdf

<<<< wstecz Publikacje

How to cite this paper?
Jak cytować ten artykuł?

MLA Chaczatrian, Karen, et al. "The synthesis of 4-aryl-1H-pyrazolo [3, 4-b] quinolines by cyclization of 4-arylidenepyrazolin-5-ones with anilines." Arkivoc 6 (2001): 63-69.

APA Chaczatrian, K., Chaczatrian, G., Danel, A., & Tomasik, P. (2001). The synthesis of 4-aryl-1H-pyrazolo [3, 4-b] quinolines by cyclization of 4-arylidenepyrazolin-5-ones with anilines. Arkivoc, 6, 63-69.

ISO 690 CHACZATRIAN, Karen, et al. The synthesis of 4-aryl-1H-pyrazolo [3, 4-b] quinolines by cyclization of 4-arylidenepyrazolin-5-ones with anilines. Arkivoc, 2001, 6: 63-69.

<<<< wstecz Publikacje