Three-component reactions of ethyl/methyl lactate, anilines and aldehydes providing quinolines have been developed via simple iron(iii) chloride catalysis without using an additional organic medium or external oxidant. This three-component protocol shows
Wan, Jie-Ping,Yang, Lu
supporting information
p. 3074 - 3078
(2020/06/25)
Rapid synthesis of quinoline-4-carboxylic acid derivatives from arylimines and 2-substituted acrylates or acrylamides under indium(III) chloride and microwave activations. Scope and limitations of the reaction
Rapid synthesis of quinoline-4-carboxylic acid derivatives has been achieved by reaction of 2-methoxy acrylates or acrylamides with N-arylbenzaldimines in acetonitrile under InCl3 catalysis and microwave irradiation. Isolated yields up to 57% within 3 min have been obtained. The Lewis acid and the microwave activation appeared as crucial parameters for the reaction. The role of indium chloride and ytterbium triflate was specified using 13C NMR data and model theoretical studies. The Royal Society of Chemistry 2005.