We examined the ability of short-wave infrared (IR) light in the λ1.5-3.0 μm region of the infrared emission spectrum to accomplish C−Cπ bond construction reaction between π-excessive azaheteroaromatic and different carbonyl substrates supported on a bentonitic clay catalyst in solventless condition via a three-component condensation reaction. Preliminary studies show that the implementation of a domestic Flavor-Wave® oven fitted with a halogen heater lamp as a chemical reactor was as effective as the use of near IR light (λ1.1 μm) in fostering batch-wise organic reactions. Overall, this approach reveals its potential exploitation as an energy-efficient source to assemble biologically engaging (hetero)arenebisindolylmethanes framework, in the same way, that assure its sustainable development as for efficient generation of small libraries of molecules comparable to high-tech instrumentations performances.

Abstract. The acylation of both aliphatic and aromatic amines, alcohols and amino alcohols by simultaneous infrared-ultrasound irradiation (SIUI) in solvent-free conditions in short reaction times and with good to excellent yields was achieved. The results obtained with SIUI and for thermal, infrared and ultrasound energy sources are compared. This is the first report regarding to the application of SIUI in acylation reactions. Resumen. Se realizó la acilación de aminas, alcoholes y amino alcoholes alifáticos y aromáticos mediante la irradiación simultánea de energía de infrarrojo y de ultrasonido (SIUI), en ausencia de disolventes, en tiempos de reacción cortos y con excelentes rendimientos de reacción. Los resultados obtenidos con SIUI fueron comparados con los obtenidos mediante el empleo de energía térmica, de infrarrojo y de ultrasonido. Este es el primer informe relacionado a la aplicación de SIUI en reacciones de acetilación.