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Communication | Special issue | Vol 58, No. 1, 2002, pp.147-151
Published online, 1st January, 1970
DOI: 10.3987/COM-02-S(M)62
An Efficient Multicomponent Reaction Involving the Interception of the Zwitterionic Intermediate between DMAD and Isocyanides with Some Active Methylene Compounds

Vijay Nair,* A. U. Vinod, R. Ramesh, Rajeev S. Menon, Luxmi Varma, Saumini Mathew, and Angele Chiaroni

*Organic Chemistry Division, Regional Research Laboratory, Council of Scientific and Industrial Research (CSIR), Trivandrum-695 019, India

Abstract

The 1:1 zwitterionic intermediate generated from dimethyl acetylenedicarboxylate and isocyanide is intercepted with 2-hydroxy-1,4-naphthoquinone, 4-hydroxycoumarin, 4-hydroxy-1-methylquinolinone, 4-hydroxy-6-methylpyrone, and 1-naphthol in one-pot to give novel pyran annulated heterocyclic systems in good yields.