Process for the dimerization of heptadiene acid esters
AssigneeSchering Corporation
InventorsChristian Burba, Peter Borner
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Abstract
A method for dimerizing heptadiene acid esters in the presence of a catalyst which is a metal of Group IA of the Periodic System or an alcoholate, hydride, amide, or tritylate thereof, or is an alcoholate, hydride, or amide of a metal of Group IIA of the Periodic System.
Claims5
A method for dimerizing heptadiene acid esters which comprises contacting the heptadiene acid esters at -20.degree. C. to +120.degree. C. with a basic catalyst selected from the group consisting of metallic lithium, sodium, and potassium, and the alcoholates, hydrides, amides, and tritylates of these metals, or contacting the heptadiene acid esters at a temperature from +20.degree. C. to 180.degree. C. in the presence of a basic catalyst selected from the group consisting of alcoholates, hydrides, and amides of barium and calcium.
An isomeric mixture consisting essentially of compounds having the formulas ##STR3##
Dependencies are inferred from the claim text.