4-Chlorobenzoic Acid → HCID 4674743, compound

Participants

Reaction Steps

To the solution of 4-chlorobenzoic acid (19) (9.36 g, 0.06 mmol) in DCM (150 mL) was added (COCl)2 (17.4 mL, 0.3 mol) dropwise and cat. amount of DMF at 0° C. The mixture was stirred at room temperature for 2 h and evaporated. The residue was again dissolved in DCM (150 mL) and added to a mixture of 4-fluoro-3-nitroaniline (6.24 g, 0.04 mol) and DIEA (20.9 mL, 0.12 mol) in CH2Cl2 (100 mL) at 0° C. The mixture was allowed to stir at room temperature overnight. The solvent was removed under vacuo and the residue was washed with sat.NaHCO3 aq. (50 mL) and brine (50 mL). The organic layer was separated, dried and purified by crystallization to give 20 (7 g, 60%).

Provenance & Evidence