| abstract |
(57) Abstract: The present invention provides a novel method for producing a compound represented by the following general formula (I). SOLUTION: General formula (I): [Wherein, R 1 is (C 3 -C 6 ) alkoxy or higher alkoxy, A 1 is an aromatic ring or a heterocyclic ring, X is an aromatic ring, A heterocyclic ring, a cyclo (lower) alkane or a single bond and A 2 each represent an aromatic ring or a heterocyclic ring. Or a salt thereof. A process for producing a compound (I) comprising the steps of: |