(1-(3-chlorophenyl)-3-(trifluoromethyl)-1H-pyrazol-5-yl)methanamine hydrochloride → 1-((1-(3-chlorophenyl)-3-(trifluoromethyl)-1H-pyrazol-5-yl)methyl)-3-(3-fluoro-4-(2-hydroxyethyl)phenyl)urea

Participants

Reaction Steps

To a stirred solution of (1-(3-chlorophenyl)-3-(trifluoromethyl)-1H-pyrazol-5-yl)methanamine hydrochloride (227 mg, 0.73 mmol, 1.0 eq) in THF (10 mL) was added TEA (147 mg, 1.45 mmol, 2.0 eq) followed by phenyl 3-fluoro-4-(2-hydroxyethyl)phenylcarbamate (200 mg, 0.73 mmol, 1.0 eq) at RT and the mixture was stirred for 16 h. The reaction mixture was concentrated under vacuum and the residue purified by CC using neutral alumina and EtOAc/PE (3:2) as eluent), followed by preparative HPLC to get 1-((1-(3-chlorophenyl)-3-(trifluoromethyl)-1H-pyrazol-5-yl)methyl)-3-(3-fluoro-4-(2-hydroxyethyl)phenyl)urea (150 mg; 45%, white solid; TLC system: EtOAc/PE (3:2); Rf: 0.2).

Provenance & Evidence