Patent ID: 6841713
Filing Date: 2005-01-11
Classification: C07C

Abstract:
1. A method for producing bicyclo[2.2.1]heptane derivatives, which comprises reacting one or more C 3-4 acyclic olefins with cyclopentadiene to give bicyclo[2.2.1]heptene derivatives of the following general formula (I): wherein R 1 and R 2 each represent a hydrogen atom, a methyl group or an ethyl group, and the sum of the carbon atoms in R 1 and R 2 is 1 or 2, followed by isomerizing them in the presence of an isomerization catalyst to give one or more bicyclo[2.2.1]heptane derivatives of the following general formula (II): wherein R 3 and R 4 each represent a hydrogen atom or a methyl group, and the sum of the carbon atoms in R 3 and R 4 is 0 or 1, the following general formula (III): wherein R 5 and R 6 each represent a hydrogen atom or a methyl group, and the sum of the carbon atoms in R 5 and R 6 is 0 or 1, and the following general formula (IV): wherein R 7 and R 8 each represent a hydrogen atom, a methyl group or an ethyl group, and the sum of the carbon atoms in R 7 and R 8 is 1 or 2.