2-Chlorobenzoic Acid → HCID 19024441, compound

Participants

Reaction Conditions

Reaction Steps

A solution of 21 mg (0.13 mmole) of 2-chlorobenzoic acid and 22 mg (0.13 mmole) of 1,1'-carbonyldiimidazole (CDI) in 0.8 mL of THF was stirred under N2 at 65° C. for 2.5 hours. Subsequently, a solution of 32 mg (0.067 mmole) of 1-[N-pentyl-N-[(2'-sulfamoylbiphenyl-4-yl)methyl]carbamoyl]indoline (from Step B) and 20 μL (0.13 mmole) of 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) in 0.8 mL of THF was added. After stirring for 29 hours at 55° C., the mixture was partitioned between EtOAc and 5% citric acid (aqueous). The organic layer was washed with water and brine, then dried over sodium sulfate. After filtration and removal of volatiles, the crude product was flash chromatographed over silica gel (gradient elution with 0.5-1.0% MeOH in CH2Cl2) to give 28 mg (68%) of the title compound as an off-white solid, mp 83°-85° C.; homogeneous by TLC (95:5 MeOH--CH2Cl2); FAB-MS m/e 616 (M+1)+.

Provenance & Evidence