✦ LIBER ✦

Intramolecular cyclization of acetylenic homoallylic ketones mediated by the addition of stannyl radicals; a short facile pathway to α-methylene-β-substituted cyclopentanones

✍ Scribed by Eun Lee; Chang-Uk Hur; Jeong-Ho Park

Publisher: Elsevier Science
Year: 1989
Tongue: French
Weight: 102 KB
Volume: 30
Category: Article
ISSN: 0040-4039
DOI: 10.1016/s0040-4039(01)93939-5

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✦ Synopsis

c-(Stannyl)methylenecyclopentanones are obtained by tributylstannane addition reactions of acetylenic homoallylic ketones. a-Methylenecyclopentanones are produced upon destannylation.

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Intramolecular cyclization of allylic pr

Intramolecular cyclization of allylic propiolates mediated by the addition of stannyl radicals: A new synthetic route to α-methylene-γ-butyrolactones

✍ Eun Lee; Sung Bo Ko; Kyung Woon Jung; Moon Ho Chang 📂 Article 📅 1989 🏛 Elsevier Science 🌐 French ⚖ 116 KB

Allylic propiolates react with tributyl-or triphenylstannane to yield a-(stannyljmethylene-y-butyrolactones. a-Methylene-y-butyrolactones are easily prepared by destannylation.