Article,

A novel organocatalytic multi-component reaction: an efficient synthesis of polysubstituted pyrano-fused spirooxindoles

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TETRAHEDRON LETTERS, 53 (28): 3603-3606 (July 2012)
DOI: {10.1016/j.tetlet.2012.05.019}

Abstract

A practical, simple, and efficient method for the synthesis of pyrano-fused spirooxindoles via an organocatalytic three-component reaction of isatins, malononitrile, and dialkyl acetylenedicarboxylate in the presence of 3,4-dimethylaniline as an organocatalyst in ethanol is reported. The structures of these products are confirmed by IR, H-1 NMR and C-13 NMR spectroscopy, mass spectrometry, and single-crystal X-ray diffraction studies. (C) 2012 Elsevier Ltd. All rights reserved.

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