Abstract
The reaction of 2-aminobenzamides with indoline-2,3-dione in ionic liquids, selectively gives 1’,3'-dihydrospiro[indolin-2-one-3,2'-quinazolin]-4'-ones in the presence of 5 mol% iodine, while giving 2-(1-acetyl-3-hydroxy-2-oxoindolin-3-ylamino) benzamide derivatives in the absence of iodine. Quinazolinones have great physiological significance and pharmaceutical uses.
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