The chromium trioxide–3,5-dimethylpyrazole complex: a mild and selective reagent for the oxidation of cyclopropyl hydrocarbons
作者:Martin G. Banwell、Najiba Haddad、Julie A. Huglin、Maureen F. MacKay、Monica E. Reum、John H. Ryan、Kathleen A. Turner (née Herbert)
DOI:10.1039/c39930000954
日期:——
The title complex selectively oxidises the methylene unit adjacent to a cyclopropane ring producing synthetically useful yields of the corresponding cyclopropyl ketones and/or products resulting from cleavage of the three-membered ring.
A photochemical rearrangement of β,γ-unsaturated cyclic ketones
作者:J.R. Williams、H. Ziffer
DOI:10.1016/s0040-4020(01)96846-2
日期:1968.1
γ-unsaturated cyclic ketones I and IV results in an unusual rearrangement yielding the conjugated cyclopropyl ketones IIa and Va. The structures of the photoproducts were deduced from their spectroscopic properties and proved by converting the photoproducts to compounds of known structure. The photoproduct Va has been converted to a 10α methyl A-nor steroid. A possible mechanism for the reaction is discussed