Reaction of Pyrrolo[2,1-c][1,4]oxazine-1,6,7-triones with 3-(Arylamino)-5,5-dimethylcyclohex-2-en-1-ones. Synthesis of Spiro[indole-3,2′-pyrroles]

8-Aroyl-3,4-dihydropyrrolo[2,1-c][1,4]oxazine-1,6,7(1H)-triones reacted with 3-(arylamino)-5,5-dimethylcyclohex-2-en-1-ones to give 3′-aroyl-1-aryl-4′-hydroxy-1′-(2-hydroxyalkyl)-6,6-dimethyl-6,7-dihydrospiro[indole-3,2′-pyrrole]-2,4,5′(1H,1′H,5H)-triones. The product structure was confirmed by X-ray analysis.