Diisopropylethylamine → HCID 67055898, compound

Participants

Reaction Steps

To a solution of 1-(tert-butoxycarbonyl)piperidine-4-carboxylic acid (2.4 g, 10 mmol) in DCM (40 mL) was added HATU (5.3 g, 14 mmol) and DIPEA (3.6 mL, 28 mmol) and the reaction mixture was stirred at room temperature for 1 h. 3-Aminobiphenyl-2-carboxamide (from Example 218) (1.5 g, 7.07 mmol) was added and the resulting mixture stirred for an additional 16 h. The reaction mixture was washed with water, the organic portion dried, filtered and concentrated under reduced pressure. The resulting residue was purified by ISCO chromatography (50% ethyl acetate in hexanes) to yield tert-butyl 4-(2-carbamoylbiphenyl-3-ylcarbamoyl)piperidine-1-carboxylate (1.0 g, 22% yield) as a white solid. LCMS Method T: retention time 1.71 min; [M+1]=423.0.

Provenance & Evidence