1,4-O-metallation process and composition
AssigneeE. I. Du Pont de Nemours and Company
InventorSalvatore A. Bruno
Life of this patent
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Abstract
This invention resides in a process for production of predominantly a 1,4-O-metallation product of a hydride of silicon, germanium, or tin with an .alpha.,.beta.-unsaturated carbonyl compound. The reaction involved takes place in the presence of a heterogeneous noncomplexed rhodium-containing catalyst. This invention also resides in 1,4-O-metallation compositions having perfluoroalkyl R groups on either side of the C.dbd.C bond of an enol ether or on the acetal side of the C.dbd.C bond of a ketene acetal.
Claims6
A composition of the formula ##STR26## wherein M represents silicon, germanium or tin and R.sup.3 represents a perfluoroalkyl group and R and R.sup.1 are selected individually from the group consisting of hydrogen and alkyl, aryl, cycloalkyl and mixed alkyl-aryl radicals containing 1 to 20 carbon atoms, R.sup.2 is selected from the group consisting of branched or straight chain alkyl radicals having 1 to 20 carbon atoms, fluoroalkyl, aryl, benzyl, cycloalkyl, substituted aminoalkyl, alkoxyalkyl, polyalkoxyalkyl, and phenoxyalkyl radicals;
- and R.sup.4 is selected individually from the group consisting of hydrogen, halogens, and branched or straight chain alkyl, aryl, alkoxy, and benzyl radicals having from 1 to 20 carbon atoms.
A composition of the formula ##STR27## wherein M represents silicon, germanium or tin and R.sup.2 and R.sup.3 represents a perfluoroalkyl group and R and R.sup.1 are selected individually from the group consisting of hydrogen and alkyl, aryl, cycloalkyl and mixed alkyl-aryl radicals containing 1 to 20 carbon atoms;
- and R.sup.4 is selected individually from the group consisting of hydrogen, halogens, and branched or straight chain alkyl, aryl, alkoxy, and benzyl radicals having from 1 to 20 carbon atoms.
Dependencies are inferred from the claim text.