Efficient multicomponent synthesis of spiro[indoline-3,4′-thiopyran]-2-ones
2017
ABSTRACTSynthesis of new thiopyran fused spirooxindoles (spiro[indoline-3,4′-thiopyran]-2-ones) were achieved by a multicomponent reaction of N-methyl isatin, malononitrile/ethyl cyanoacetate, and β-oxodithioester using N,N′-dimethylaminopyridine as the catalyst.
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