The present invention provides a process for producing 2-halobenzoic acids of the general formula (I), characterized by reacting a benzoic acid of formula (II) with a halogenating agent in the presence of Pd catalyst:
1
(wherein A is —OH, —OM (M is alkali metal), —N(R
6
)R
7
(R
6
and R
7
are each H, C
1
-C
6
alkyl, optionally substituted phenyl, or the like) ; R is H, C
1
-C
6
alkyl, C
1
-C
6
alkylcarbonyl, carboxyl, C
1
-C
12
alkoxycarbonyl, optionally substituted phenylcarbonyl, or the like; n is 0 to 4; X is Cl, Br or I, or alternatively (R)n may be present on benzene-constituting carbon atoms adjacent to each other and form a C
3
-C
4
alkylene- or C
3
-C
4
alkenylene-fused ring).
本发明提供了一种生产通式(I)的2-卤代
苯甲酸的方法,其特征在于在Pd催化剂的存在下,将通式(II)的
苯甲酸与卤代试剂反应:1(其中A为-OH,-OM(M为碱
金属),-N(R6)R7(R6和R7分别为H,C1-C6烷基,可选地取代苯基等);R为H,C1-C6烷基,C1-C6烷基羰基,羧基,C1-C12烷氧羰基,可选地取代苯基羰基等;n为0至4;X为Cl,Br或I,或者(R)n可以存在于相邻的苯构成碳原子上,并形成C3-C4烷基或C3-C4烯基融合环)。