Liu Chang-chu
2014
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Journal
Fine chemicals
Abstract
N-( 4-Methylphenyl) acetamide underwent acylation and cyclization with substituted phenylacetic acids under microwave irradiation to afford 2,6-dimethyl-3-aryl-4( 1H)-quinolones. The procedure has the advantages of short reaction time,high yield and easy handling. Using BF 3 ·Et 2 O as catalyst,the acylation of N-( 4-methylphenyl) acetamide with substituted phenylacetic acids at 80 ℃ for 15 min under microwave irradiation gave N-[4-methyl-2-( 2-arylacetyl) phenyl]acetamides with 85. 7% ~ 91. 3% yields. 2,6-Dimethyl-3-aryl-4( 1H)-quinolones were synthesized with 89. 2% ~ 94. 3% yields through cyclization of N-[4-methyl-2-( 2-arylacetyl) phenyl]acetamides at reflux for 20 min in the presence of sodium tert-butanolate and tert-butanol under microwave irradiation. The structures of the target compounds were identified by IR,1HNMR spectra and elemental analysis.