Reaction #84049

Reaction equation

methyl 6-bromo-1-benzothiophene-2-carboxylate

potassium hydroxide

→

desired product

6-Bromo-1-benzothiophene-2-carboxylic acid

Solvents

THF

Conditions

Workup

1. 1
   OtherThe solvent is removed in vacuo
2. 2
   FiltrationThe resulting precipitate is filtered off with suction
3. 3
   Washwashed with water
4. 4
   Otherdried in vacuo at 50° C

Procedure

A solution of 4.0 g (14.8 mmol) of methyl 6-bromo-1-benzothiophene-2-carboxylate in 40 ml of a 1:1 mixture of THF and 2 N potassium hydroxide solution is stirred at room temperature for 2 h. The solvent is removed in vacuo, and the residue is acidified with concentrated hydrochloric acid. The resulting precipitate is filtered off with suction, washed with water and dried in vacuo at 50° C. 3.55 g (93.5% of theory) of the desired product are obtained.

Source