4-Nitrobenzoyl chloride → N-{4-[2-cyclopentyl-1-(thiazol-2-ylcarbamoyl)-ethyl]-phenyl}-4-nitro-benzamide

Participants

Reaction Conditions

Reaction Steps

A solution of 2-(4-amino-phenyl)-3-cyclopentyl-N-thiazol-2-yl-propionamide (prepared in Example 3, 63.0 mg, 0.20 mmol) in tetrahydrofuran (10 mL) was treated with N,N-diisopropylethylamine (0.04 mL, 0.24 mmol) and 4-nitro-benzoyl chloride (49.0 mg, 0.26 mmol). The reaction mixture was stirred at 25° C. for 21 h. At this time, the reaction was concentrated in vacuo. The residue was triturated with diethyl ether to afford N-{4-[2-cyclopentyl-1-(thiazol-2-ylcarbamoyl)-ethyl]-phenyl}-4-nitro-benzamide (73.7 mg, 79.3%) as a pale yellow solid: mp 236-238° C.; FAB-HRMS m/e calcd for C24H24N4O4S (M+H)+ 465.1596, found 465.1617.

Provenance & Evidence