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Paper | Special issue | Vol 61, No. 1, 2003, pp.105-112
Published online, 18th March, 2003
DOI: 10.3987/COM-03-S1
Transformation of N-(5-Acetyl-6-methyl-2-oxo-2H-pyran-3-yl)benzamide with Hydrazines in the Presence of an Acidic Catalyst

Lidija Vranicar, Slovenko Polanc, and Marijan Kočevar*

*Faculty of Chemistry and Chemical Technology, University of Ljubljana, Askerceva 5, SI-1000 Ljubljana, Slovenia


2H-Pyran-2-one derivative (1) was transformed with heterocyclic hydrazines and 2,4-dinitrophenylhydrazine, under the influence of various acidic catalysts, into N-[5-(1-hydrazonoethyl)-6-methyl-2-oxo-2H-pyran-3-yl]benzamides (3) as the main products, accompanied in some cases by the corresponding (E)-α,β-didehydro-α-amino acid derivatives (4).