Abstract: This invention relates to the preparation of unsaturated alcohols useful as flavor and fragrance compounds. More specifically, this invention relates to the preparation of predominately cis-unsaturated alcohols by reacting a cis-1-alkenylaluminum dialkyl compound with an epoxide compound followed by hydrolysis. The alkenyl moiety has one or more double bond carbon-to-carbon linkage and from 5 to 20 carbon atoms that can be optionally substituted with the substituents selected from alkyl and aromatic radicals having 1 to 12 carbon atoms.

Abstract: Dialkylaluminum hydrides are produced by subjecting a mixed aluminum alkyl having the formula R.sub.2 AlR' to pyrolysis. R is methyl, ethyl, n-alkyl or an alkyl group which has no hydrogen atoms on the carbon atom .beta. to the aluminum. R' is an .alpha. - or .beta. - branched alkyl group having the formula ##STR1## in which one R" is hydrogen and the other is alkyl and R"' is alkyl. The mixed aluminum alkyl R.sub.2 AlR' can be obtained either by reaction of two aluminum alkyls:2R.sub.3 Al+R'.sub.3 Al.fwdarw.3R.sub.2 AlR'or by reaction of a trialkylaluminum with a dialkylaluminum hydride:2R.sub.3 Al+R'.sub.2 AlH.fwdarw.2R.sub.2 AlR'+R.sub.

Abstract: This invention relates to the preparation of unsaturated alcohols useful as flavor and fragrance compounds. More specifically, this invention relates to the preparation of predominantly cis-unsaturated alcohols by reacting a cis-1-alkenylaluminum dialkyl compound with an epoxide compound followed by hydrolysis. The alkenyl moiety has one or more double bond carbon-to-carbon linkage and from 5 to 20 carbon atoms that can be optionally substituted with the substituents selected from alkyl and aromatic radicals having 1 to 12 carbon atoms.

Abstract: An economically attractive Redistribution Process for the production of trimethylaluminum and numerous alkylaluminum bromides and iodides is described herein. The Redistribution Process is a chemical reequilibration reaction which consists of forming a mixture of a methylaluminum bromide or iodide with aluminum trialkyl followed by separating by distillation, trimethylaluminum from the alkylaluminum bromides or iodides. The preferred method for separating the mixture of methylaluminum bromide or iodide and aluminum trialkyl into trimethylaluminum and alkylaluminum bromide or iodide is fractional distillation. Trimethylaluminum and the alkylaluminum bromides and iodides are valuable commercial materials for use as co-catalysts for the polymerization of various unsaturated hydrocarbons. Trimethylaluminum is also employed as a methylating agent, a chemical intermediate and a pyrophoric fuel.

Abstract: This invention relates to the preparation of unsaturated alcohols useful as flavor and fragrance compounds. More specifically, this invention relates to the preparation of predominately cis-unsaturated alcohols by reacting a cis-1-alkenyl-aluminum dialkyl compound with an epoxide compound followed by hydrolysis. The alkenyl moiety has one or more double bond carbon-to-carbon linkage and from 5 to 20 carbon atoms that can be optionally substituted with the substituents selected from alkyl and aromatic radicals having 1 to 12 carbon atoms.

Abstract: Dialkylaluminum hydrides are produced by subjecting a mixed aluminum alkyl having the formulaR.sub.2 AlR'to pyrolysis. R is methyl, ethyl, n-alkyl or an alkyl group which has no hydrogen atoms on the carbon atom .beta. to the aluminum. R' is an .alpha.- or .beta. branched alkyl group having the formula ##STR1## in which one R" is hydrogen and the other is alkyl and R'" is alkyl. The mixed aluminum alkyl R.sub.2 AlR' can be obtained either by reaction of two aluminum alkyls:2R.sub.3 Al + R'.sub.3 Al .fwdarw. 3R.sub.2 AlR'or by reaction of a trialkylaluminum with a dialkylaluminum hydride:2R.sub.3 Al + R'.sub.2 AlH .fwdarw. 2R.sub.2 AlR' + R.sub.2 AlH,in which case one third of the desired hydride is synthesized.

Abstract: This invention relates to the preparation of unsaturated alcohols useful as flavor and fragrance compounds. More specifically, this invention relates to the preparation of predominately cis-unsaturated alcohols by reacting a cis-1-alkenylaluminum dialkyl compound with an epoxide compound followed by hydrolysis. The alkenyl moiety has one or more double bond carbon-to-carbon linkage and from 5 to 20 carbon atoms that can be optionally substituted with the substituents selected from alkyl and aromatic radicals having 1 to 12 carbon atoms.