Synthesis of unsaturated carbonyl compounds via a chromium-mediated allylic oxidation by 70% tert.butylhydroperoxide
作者:Jacques Muzart
DOI:10.1016/s0040-4039(00)96591-2
日期:1987.1
Alkenes were converted into α,β-unsaturated carbonyl compounds using excess of tert.butylhydroperoxide and catalytic amounts of chromiumVI oxide at room temperature. Fair yields and conversions were obtained from Δ5-steroids while allylicoxidation of acyclic alkenes was less efficient. Epoxidation of the double bond, sometimes observed, remained a minor reaction pathway.
This application relates to derivatives of hydrocarbon terpenes (e.g., myrcene or farnesene), to methods of making the derivatives, and to the use of the derivatives as surfactants.
The oxidation of primary and secondary, saturated, allylic or benzylic, alcohols is carried out in 1,2-dichloroethane at reflux using catalytic amounts of both PdCl2 and Adogen 464 in the presence of an excess of sodium carbonate. High selectivities are obtained from saturated and benzylic, secondary alcohols. Primary alcohols afford mixtures of aldehydes and esters. The migration of the double bond
Catalyse par le palladium et al lumiére ultra-violette de l'oxydation d'alcénes par l'oxygéne moléculaire
作者:Jacques Muzart、Patrick Pale、Jean-Pierre Pete
DOI:10.1016/0022-328x(88)83072-9
日期:1988.9
The light-promoted oxidation of terminal alkenes by oxygen in the presence of catalytic amounts of palladium(II) complexes led to corresponding α,β-ethylenic carbonyl compounds and methyl ketones; rapid and extensive isomerisation of the starting alkene is observed. The effect of acetone as solvent on the efficiency of these oxidations is discussed.