申请人:PFIZER INC.
公开号:EP0342849A3
公开(公告)日:1990-03-14
Compounds of the formula:
wherein Y is OR¹, fluoro, chloro, methyl,
R¹, and R³ are independently selected from hydrogen and C₁-C₄ alkyl, R² is C₁-C₄ alkyl and X is fluoro, chloro or bromo, with the proviso that when Y is OH, X cannot be bromo and with the proviso that X can be fluoro only if R² is methyl.
式的化合物:
其中Y为OR¹,氟,氯,甲基,
R¹和R³分别选自氢和C₁-C₄烷基,R²为C₁-C₄烷基,X为氟,氯或溴,但当Y为OH时,X不能为溴,且X只能为氟当且仅当R²为甲基。