A combination of green solvent and ultrasonic irradiation promotes the catalyst-free reaction of aldehydes, indoles and Meldrum’s acid
作者:Cheng-Wei Lü、Jia-Jing Wang、Yan-Hang Liu、Wen-Juan Shan、Qi Sun、Lei Shi
DOI:10.1007/s11164-016-2675-8
日期:2017.2
Meldrum’s acid and aldehydes in a mixture of solvent from glycerol and water under ultrasonic irradiation at room temperature without catalyst. A series of aromatic aldehydes representative of various electronic and steric conditions were employed to examine the scope of substrates for this protocol in moderate to good yields. No catalyst, clean reaction conditions, tolerating the substrates with diverse
l-Proline catalyzed multicomponent one-pot synthesis of gem-diheteroarylmethane derivatives using facile grinding operation under solvent-free conditions at room temperature
作者:Goutam Brahmachari、Suvankar Das
DOI:10.1039/c3ra44568b
日期:——
straightforward L-proline catalyzedone-potsynthesis of a series of biologically relevant gem-(β-dicarbonyl)arylmethanes has been developed via a three-component reaction between indoles, aldehydes and C–H activated acids by grinding them together under solvent-free conditions at room temperature. Mild reaction conditions, high atom-economy, good yields, and eco-friendliness are some of the salient