A phenoxycarboxylic acid derivative having the formula ##STR1## wherein R represents ##STR2## and X.sub.1 represents a hydrogen atom, a halogen atom, a lower alkyl group, trifluoromethyl group, nitro group or cyano group and X.sub.2 represents a hydrogen atom, a halogen atom, a lower alkyl group, nitro group or cyano group, R' represents ##STR3## and R.sub.1 and R.sub.2 are the same and different and respectively represent hydrogen atom or a lower alkyl group, is produced by reacting a phenol compound having the formula ##STR4## with a halogen compound having X--R' wherein X represents a halogen atom in the presence of a base. The reaction is carried out in the presence of a quarternary ammonium salt or a quaternary phosphonium salt in a nonpolar solvent.
                            具有以下结构式的苯氧
羧酸衍
生物:##STR1## 其中R代表##STR2## X.sub.1代表氢原子,卤素原子,低碳基,三
氟甲基基团,硝基或
氰基,X.sub.2代表氢原子,卤素原子,低碳基,硝基或
氰基,R'代表##STR3## R.sub.1和R.sub.2分别表示氢原子或低碳基,相同或不同。该衍
生物是通过在碱存在下,将具有以下结构式的
苯酚化合物##STR4## 与具有X-R'的卤素化合物反应而制得。反应在非极性溶剂中,在季
铵盐或季膦盐的存在下进行。