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5(3)-Hydroxyisoxazolidin-3(5)-ones and 5-hydroxy-pyrazolidin-3-ones and their ring-chain tautomerism

โœ Scribed by K. N. Zelenin; I. P. Bezhan; I. V. Lagoda

Book ID
104782153
Publisher
Springer US
Year
1991
Tongue
English
Weight
159 KB
Volume
27
Category
Article
ISSN
0009-3122

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## Abstract ฮฑ,ฮฒโ€Unsaturated lactones or lactams 1 react with hydrazines 2 via Michaelโ€like addition and subsequent ring transformation by nucleophilic attack of the hitherto unchanged hydrazine nitrogen atom at the carbonyl carbon atom. The addition is highly transโ€stereoselective, thus affording o