Back to results
US 4,727,195 AGranted
Process for the preparation of unsaturated ketones
AssigneeShell Oil Company
InventorEit Drent
Life of this patent
Estimating the term…
Abstract
A process for preparing compounds of the general formula: R--C.tbd.C--C(O)--C(R).dbd.CH.sub.2 (I) R represents an H atom or an optionally substituted hydrocarbyl group, by reacting a compound R--C.tbd.CH with CO in the presence of a Pd(II) compound, an organic phosphine and a protonic acid having a pK.sub.a below 3.0. Compounds of formula I in which R represents an optionally substituted hydrocarbyl group are novel.
Claims9
A process for the preparation of acetylenically and ethylenically unsaturated ketones of the general formula I:
- ##STR4## in which R represents a hydrogen atom, a substituted alkyl group or an unsubstituted alkyl group, which process comprises reacting an acetylenically unsaturated compound of the general formula II:
- R--C.tbd.CH (II)
- in which R has the same meaning as in the general formula I with carbon monoxide in the presence of a catalytic system formed by combining:
- (a) a palladium alkanoate,
- (b) an organic phosphine, and
- (c) a protonic acid having a pK.sub.a below 3.0 (measured at 18.degree. C. in aqueous solution), with the exception of carboxylic acids.
3 more elements
Dependencies are inferred from the claim text.