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V.  Nair, Biju, A. T., Vinod, A. V., and Eringathodi, S., ?Reaction of huisgen zwitterion with 1,2-benzoquinones and isatins: expeditious synthesis of dihydro-1,2,3-benzoxadiazoles and spirooxadiazolines?, Organic Letters, vol. 7, no. 23, pp. 5139?5142, 2005.

V.  Nair, Mathew, S. C., Biju, A. T., and Eringathodi, S., ?Reaction of tpp-azodicarboxylate zwitterions and aldehydes: unprecedented synthesis of acyl carbamates?, Tetrahedron Letters, vol. 48, no. 51, pp. 9018?9020, 2007.

V.  Nair, Mathew, S. C., Biju, A. T., and Eringathodi, S., ?Reaction of huisgen zwitterion with diaryl ketones leading to the facile synthesis of mono- and bis(alkoxycarbonyl)hydrazones?, Synthesis-Stuttgart, no. 7, pp. 1078-1084, 2008.

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