Issue 9, 1980

Radical reactions of bicyclo[2.1.0]pentane

Abstract

The photochemical reactions of bicyclo[2.1.0]pentane with bromine, bromotrichloromethane, t-butyl hypochlorite, di-t-butyl peroxide, and N-bromosuccinimide have been investigated. Trichloromethyl, t-butoxyl, and succinimidyl radicals abstract hydrogen from the C4 ring. The expected bicyclopentyl radicals were not detected and if they are discrete intermediates they must rearrange by fission of the C(1)–C(4) bond common to the two rings to form cyclopent-3-enyl radicals. The e.s.r. spectrum of the latter radicals was obtained. Bromine (and chlorine) atoms may abstract hydrogen, but their major pathway involves attack at the bridgehead carbon atoms in an SH2 reaction with fission of the C(1)–C(4) bond to give 3-halogenocyclopentyl radicals.

Article information

Article type
Paper

J. Chem. Soc., Perkin Trans. 2, 1980, 1366-1371

Radical reactions of bicyclo[2.1.0]pentane

C. Jamieson, J. C. Walton and K. U. Ingold, J. Chem. Soc., Perkin Trans. 2, 1980, 1366 DOI: 10.1039/P29800001366

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