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Ramin Ghahremanzadeh,Zahra Rashid,Amir-Hassan Zarnani,Hossein Naeimi 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.6
A simple, efficient and rapid method has been developed for synthesis of 6,6-dimethyl-4-phenyl-6,7-dihydro-1H-spiro[furo[3,4-b]quinoline-9,30-indoline]1,20,8(3H,4H,5H)-trione derivatives. These heterocycleswere prepared through domino one-pot and multicomponent condensation reactions of isatins,dimedone, and anilinolactones in the presence of alum (15 mol%) as an inexpensive, nontoxic,convenient, and available Lewis acid catalyst under microwave irradiation. The corresponding productshave been obtained in excellent isolated yields between 78% and 90%, with high purity, in short reactiontimes about 10–12 min and easy work up.