Patent ID: 6506944
Filing Date: 2003-01-14
Classification: C07B,C07C

Abstract:
A process for preparing compounds of the formula (I)Eâ€”CH2â€”CH&boxH;CHâ€”CH2â€”E1â€ƒâ€ƒ(I) by self metathesis or cross metathesis of compounds of the formulae (II) and/or (III)Râ€”CH&boxH;CHâ€”CH2â€”Eâ€ƒâ€ƒ(II) R1â€”CH&boxH;CHâ€”CH2â€”E1â€ƒâ€ƒ(III) whereE,E1 are independently â€”CHO, â€”COOH, â€”COOR2, â€”C(O)NR3R4, â€”CN, R,R1 are independently H, C1-12-alkyl, C6-12-aryl, or C7-13-alkylaryl and R2, R3, R4 are independently H, C1-12-alkyl, C7-13-aralkyl, in the presence of a homogenous catalyst comprising ruthenium compounds or ruthenium complexes.