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Paper | Regular issue | Vol 36, No. 10, 1993, pp.2267-2272
Published online, 1st January, 1970
DOI: 10.3987/COM-93-6396
Synthesis of Pyrazolidin-3-ones from α,β-Unsaturated Sugar Lactones and Hydrazine

Irma Panfil and Marek Chmielewski*

*Institute of Organic Chemistry, Polish Academy of Sciences, ul. Kasprzaka 44/52, P.O.Box 58, PL-01-224 Warszawa 42, Poland

Abstract

Conjugate addition - cyclization of hydrazine to δ-lactones (2, 3, and 6) provides the respective pyrazolidin-3-ones as single products. The addition proceeds anti to the terminal carbon atom of the sugar lactone.