Gomez-Caro, L.C. (Lilia C.)
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- Synthesis of quinoxaline 1,4-di-N-oxide derivatives on solid support using room temperature and microwave-assisted solvent-free procedures(Sociedade Brasileira de Química, 2011) Rivera, G. (Gildardo); Monge, A. (Antonio); Gomez-Caro, L.C. (Lilia C.); Bocanegra-Garcia, V. (Virgilio); Sanchez-Sanchez, M. (Mario)We describe the synthesis of 12 new ethyl and methyl quinoxaline-7-carboxylate 1,4-di-N-oxide derivatives on solid supports with room temperature and microwave-assisted solvent-free procedures. Results show that solid supports have good catalytic activity in the formation of quinoxaline 1,4-di-N-oxide derivatives. We found that florisil and montmorillonite KSF and K10 could be used as new, easily available, inexpensive alternatives of catalysts. Additionally, room temperature and microwave-irradiation solvent-free synthesis was more efficient than a conventional procedure (Beirut reaction), reducing reaction time and increasing yield.