2-Aminopyridine → 2-Benzyl-4-isopropoxy-2,3-dihydro-benzofuran-6-carboxylic acid pyridin-2-ylamide

Participants

Reaction Steps

A mixture of 2-benzyl-4-isopropoxy-2,3-dihydro-benzofuran-6-carboxylic acid (220j) (0.5 g, 1.9 mmol), DIPEA (0.37 g, 2.85 mmol) and HATU (0.74 g, 1.94 mmol) in DMF (15 mL) was stirred at room temperature for 1 hr, and then pyridin-2-amine (0.18 g, 1.94 mmol) was added in one portion. The mixture was stirred at room temperature overnight. TLC (EtOAc/petroleum ether=1/2) indicated that the reaction was complete. The mixture was concentrated. The residue was purified by prep. HPLC to give the title compound (73 mg, 21% yield, TFA salt) as a white solid. 1H NMR (400 MHz, CDCl3): δ11.71 (br, 1H), 8.76 (d, 1H), 8.27 (d, 1H), 8.14 (t, 1H), 7.17˜7.46 (m, 9H), 4.96 (d, 1H), 4.78 (t, 1H), 2.82 (m, 1H), 2.67 (m, 1H), 2.19 (m, 1H), 1.96 (m, 1H), 1.32 (d, 6H).

Provenance & Evidence