| 摘要 |
A process for prepg. the title compd. of formula (I) comprises (i) reacting (II) with alkylating agent (III) in the presence of alkali and org. amine, and (ii) hydrolyzing by inorg. acid e.g. HCl, H2SO4. In the formula, R1, R2=H, halogen, nitro, low alkyl each (R1=R2=H excluded); R3=H, low alkoxy, low alkoxy carbonyl; X=halogen; Y=cyano; n=2-4. The title compd. is useful as treating agent of allergic diseases.
|
