Patent ID: 6756500
Filing Date: 2004-06-29
Classification: C07B,C07C,C07D,C07F

Abstract:
A process for preparing a cyclic compound comprising subjecting a starting material in the presence of a catalyst component to metathesis reaction in the presence of an ionic liquid, and thereby forming the cyclic compound,wherein the starting material is &agr;,&ohgr;-diene having the formula (I) â€ƒwherein n is 1, 2, 3 or 4, R is hydrogen or an organic substituent selected from the group consisting of fused aryl groups, unfused aryl groups, alkyl groups, CN groups, and COOR2 groups, R1 is tert-butyl, P(R)2, P(R2)2, COR, SO2PhR, COOR or CONRR2, R2 is alkyl or phenyl, or R and R1 together form â€ƒand wherein the &agr;,&ohgr;-diene optionally bears at least one further substituent R in any other position with the exception of the &agr; position, wherein the catalyst component is a ruthenium, an osmium, or a molybdenum homogenous catalyst or a heterogeneous catalyst selected from the group consisting of (I) ruthenium, osmium, or molybdenum carbenes, (ii) transition metal compounds that form transition metal carbenes under the reaction conditions, and (iii) transition metal salts in combination with an alkylating agent.