Synthesis 2007(5): 697-704  
DOI: 10.1055/s-2007-965910
© Georg Thieme Verlag Stuttgart · New York

The Reaction of Huisgen Zwitterion with Diaryl-1,2-diones and Ketones: An Efficient Protocol for Carbon-Nitrogen Bond Formation

Vijay Nair*, A. T. Biju, Smitha C. Mathew
Organic Chemistry Section, Regional Research Laboratory (CSIR), Trivandrum 695019, India
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Further Information

Publication History

Received 19 October 2006
Publication Date:
25 January 2007 (eFirst)


The reaction of Huisgen zwitterion, derived from triphenylphosphine and dialkyl azodicarboxylate, with diaryl-1,2-diones afforded N,N-dicarboalkoxy monohydrazones via a mechanistically novel rearrangement. Cyclic and acyclic ketones furnished vinyl hydrazinedicarboxylates under similar conditions.