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Journal of the Mexican Chemical Society
versión impresa ISSN 1870-249X
Resumen
GOMEZ-PLIEGO, Raquel et al. The Hantzsch Ester Production in a Water-based Biphasic Medium, Using Infrared Irradiation as the Activating Source. J. Mex. Chem. Soc [online]. 2007, vol.51, n.4, pp.181-184. ISSN 1870-249X.
The reaction of a wide number of benzaldehydes (1a-n) with ethyl (2a) or methyl (2b) acetoacetate and aqueous ammonia (3) has been carried out in the absence of an organic solvent, and using for the first time infrared irradiation as the heating mode. Thus, under the green chemistry protocole, the corresponding mono-1,4-dihydropyridines (4a-j) and bis-1,4-dihydropyridines (4k-n) were obtained in good yields and short reaction times.
Palabras llave : Hantzsch synthesis; benzaldehydes; 1,4-dihydropyridines; infrared irradiation; green chemistry.