| 摘要 |
PCT No. PCT/EP96/02998 Sec. 371 Date Apr. 23, 1998 Sec. 102(e) Date Apr. 23, 1998 PCT Filed Jul. 8, 1996 PCT Pub. No. WO97/02231 PCT Pub. Date Jan. 23, 1997A process for preparing a compound of formula (I) or an addition salt thereof and/or a solvate thereof: wherein R1, R2, R4 and R5 are each independently C1-4 alkoxy and R3 is C1-6 alkyl, which process comprises reacting an arylamine of formula (II): wherein R4 and R5 are as defined in relation to formula (I) with a beta -aminoaldehyde of formula (III): wherein R1, R2 and R3 are as defined in relation to formula (I); and thereafter reducing the intermediate so formed and, optionally, forming an addition salt of the compound of formula (I) and/or a solvate thereof. |
