Tetrahedron

Cyclisations radicalaires—XXV: Inhibition sterique de la formation du cycle a six carbones dans la cyclisation de radicaux Δ, ε ethyleniques

M Julia, C Descoins, M Baillarge, B Jacquet, D Uguen…

文献索引：Julia,M. et al. Tetrahedron, 1975 , vol. 31, p. 1737 - 1744

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被引用次数: 38

摘要

ABSTRACT: The steric effect of substituents at sp2 carbons on the cyclisation of ethylenic free radicals has been investigated. The isomeric 1-bromo 5-methyl 5-heptenes (4E and 4Z) have been prepared and reduced with tributyltin hydride. The steric effect of the terminal methyl group in the transition state leading to the six-membered ring is discussed.