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Ritter-type reaction; heteropolyanions ionic liquid; amidoalkyl naphthol; multi-component reaction

A facile and efficient procedure for the preparation of amidoalkyl naphthols via a Ritter-type reaction of 2-naphthol, aromatic aldehydes and amide in the presence of heteropolyanion-based functionalized ionic liquid has been described. The one-pot solvent-free three-component reaction is accomplished at 110°C for 5-10 min in reasonable to good yield ranging from 73% to 94%. The catalyst could be recovered and reused at least six times without noticeably decreasing the catalytic activity.

Fang Dong¹ Jiang Chenning¹ Zhu Ting¹ Yang Jinming¹

1. Department of Pharmaceutical Engineering, School of Chemistry and Chemical Engineering, Yancheng Teachers University, 50 Kai Fang Da Dao, Yancheng 224002, Jiangsu, P. R. China

Published

July 2013

Manuscript received

15 May 2012

Manuscript revised

3 October 2012

Accepted

5 April 2013

• supp7.doc