SCHEDULED MAINTENANCE
Reaction of the cyclopentanone (1) with the Wittig reagent ethylidenetriphenylphosphorane gives as product not the expected ethylidenecyclopentane but the ethylidenecyclohexane (3); structures of the alcohol (2), the lactone (4a), and the ether (5a) were established by X-ray diffraction methods.
E. G. Brain, F. Cassidy, A. W. Lake, P. J. Cox and G. A. Sim, J. Chem. Soc., Chem. Commun., 1972, 497 DOI: 10.1039/C39720000497
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