A process for the preparation of a compound of formula ##STR1## wherein X represents hydrogen, halogen, trifluoromethyl or lower alkyl group; W represents methyl, Q represents hydrogen or W and Q, together, form an ethylene group and R' represents a lower alkyl group which comprises protecting the amino group of the phenol corresponding to the compound of formula I, submitting the compound thus obtained to an alkylation (with a compound of formula Hal--CH.sub.2 --COOR', wherein R' is as defined hereinabove for the formula I and Hal is chlorine, bromine or iodine) and then releasing the amino group of the product thus obtained.
一种制备公式##
STR1##中化合物的方法,其中X代表
氢、卤素、三
氟甲基或较低的烷基;W代表
甲基,Q代表
氢或W和Q一起形成
乙烯基,R'代表较低的烷基,该方法包括保护与公式I相应的
苯酚的
氨基,将所得化合物进行烷基化(使用公式Hal--CH.sub.2 --COOR'的化合物进行烷基化,其中R'如上述公式I所定义,Hal是
氯、
溴或
碘),然后释放所得产物的
氨基基团。