Potassium Hydroxide → HCID 121267897, compound

Participants

Reaction Conditions

Reaction Steps

To the stirring mixture of methyl 6-amino-5-[5-({[(3-methylphenyl)amino]carbonyl}amino)-1-benzothien-2-yl]nicotinate (420 mg, 0.972 mmol, 1 eq) in MeOH—H2O (3:1, 20 mL) at room temperature was added potassium hydroxide pellets (272 mg, 5 eq) and the reaction mixture was stirred at 65° C. for total of two hours, at which time the reaction mixture became a clear yellow solution. The solution was concentrated under reduced pressure to remove most part of methanol. The mixture was then cooled in an ice-bath, concentrated hydrochloride was added dropwise, and the pH was adjusted to about 3. After the mixture was stirred for about another 30 minutes, it was filtered through a Buchner funnel, rinsed with water, and 6-amino-5-[5-({[(3-methylphenyl)amino]carbonyl}amino)-1-benzothien-2-yl]nicotinic acid was obtained as a yellow solid in quantitative yield.

Provenance & Evidence