Shell Oil Comapny

Other

Albertus J Mulder

Pieter A Verbrugge

Aaldert J De Jong

Roger A Sheldon

Johannes W Van Der Meer

The invention provides a process for epoxidizing an olefinic double bond in an olefinically-unsaturated compound by contact of a liquid phase mixture containing the olefinically-unsaturated compound, an aldehyde having at least two carbon atoms and a suitable solvent with molecular oxygen in the presence of a catalyst which is soluble in the reaction mixture and which comprises a praseodymium compound. The process has particularly advantageous application to oxidation of aldrin to dieldrin.

Process for epoxidation of olefinically-unsaturated compounds

The invention provides a process for preparing a 7-oxabicyclo[2.2.1]heptan-2-ol, which comprises treating a liquid-phase mixture of the corresponding cyclohex-3-en-1-ol, an aldehyde containing at least two carbon atoms and a suitable solvent, with oxygen in the presence of a catalyst which is soluble in the reaction mixture and which comprises a praseodymium compound and at least one compound selected from compounds of molybdenum, niobium, tantalum, tungsten, uranium and vanadium.

Process for preparing oxabicycloalkane compounds

Derivative compounds of 1,5-dimethylbicyclo [3,2,1] octane of the general formula ##STR1## and perfume compositions containing these derivatives, wherein X represents a C.dbd.O group, a ##STR2## group or a ##STR3## group, in which R.sub.1 and R.sub.2 are alkyl groups and R.sub.3 is an ethylene or trimethylene group which may be substituted with one or more alkyl groups. These derivative compounds may be prepared by oxidation of 1,5-dimethylbicyclo [3,2,1] octan-8-ol or an ester thereof optionally followed by reaction with an alkanol or a 1,2- or 1,3-alkane-diol.

Derivatives of 1,5-dimethylbicyclo [3,2,1] octane, the preparation of

Novel compounds of general formula (I) ##STR1## wherein X represents a F, Cl, Br, I or CN are of interest as heat stable ligands for catalytic systems. They can be prepared in good yields from 1,5-dimethyl-1,5-cyclooctadiene as well as from the corresponding bicyclic alcohol wherein X is OH.

Novel 8-substituted bicyclo(3,2,)-octanes

A process for the preparation of 1,5-dimethylbicyclo[3,2,1]octan-8-ol is described wherein 1,5-dimethyl-1,5-cyclooctadiene is reacted with a carboxylic acid in the optional presence of acid catalyst to form the corresponding ester of 1,5-dimethylbicyclo[3,2,1]-octan-8-ol which is subsequently hydrolyzed or alcoholyzed to the alcohol product.

Process for preparation of 1,5-dimethylbicyclo[3,2,1]octan-8-ol

Esters of 1,5-dimethylbicyclo[3,2,1]octan-8-ol of the general formula: ##STR1## wherein R represents hydrogen or an aliphatic or an aromatic hydrocarbon group optionally substituted with an amino group; are useful as aroma chemicals.

Esters of 1,5-dimethylbicyclo-[3,2,1]octan-8-ol

3-Bromobenzaldehyde is prepared by treating benzaldehyde with bromine chloride in the presence of aluminum chloride and a solvent, under specified conditions.

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Amsterdam, Netherlands

Albertus J Mulder