| abstract |
The present invention relates to a process for preparing a compound of formula (1), characterized by reacting a compound of formula (2) with a compound of formula (3) in the presence of a base in a solvent:n n n n n n n n n n n n n n n n n n n n n n n n In the above formula,n n n R 1 represents C 1-5 straight or branched alkyl, C 1-5 haloalkyl or C 3-6 cycloalkyl,n n n R 2 represents C 1-3 alkyl or C 1-3 haloalkyl,n n n R 3 each independently represents 1 to 5 substituted or unsubstituted phenyl by chloride, methoxy, ethoxy, phenoxy or nitro group,n n n Y represents leaving groups such as chloride and bromide. |