Triethylamine → 7-[(4-Cyclopropylphenyl)acetyl]-2-(5-pyrimidin-2-yl-2,3-dihydro-1H-inden-1-yl)-2,7-diazaspiro[3.5]nonane

Participants

Reaction Steps

Triethylamine (0.1 mL) was added to a solution of 2-(5-pyrimidin-2-yl-2,3-dihydro-1H-inden-1-yl)-2,7-diazaspiro[3.5]nonane dihydrochloride (5-1b, 80 mg, 0.2 mmol), 4-cyclopropylphenylacetic acid (SM-1ag, 31 mg, 0.2 mmol), and HATU (93 mg, 0.24 mmol) in dichloromethane (5 mL) in a vial. The reaction was stirred at room temperature overnight and was quenched with aqueous sodium bicarbonate. The organic layer was dried over MgSO4, filtered and concentrated. The residue was chromatographed on a Combiflash ISCO purification system (Teledyne Corp., Lincoln, Nebr.) using a 12 g silica column with dichloromethane-methanol as eluant. The final product was obtained as off-white solid (89 mg, 92%). MS (APCI) 478.6 (M+H)+. 1H NMR (CDCl3) δ 0.65-0.69 (m, 3H), 0.92-0.97 (m, 2H), 1.67-1.71 (m, 2H), 1.83-1.90 (m, 2H), 2.19-2.22 (m, 1H), 2.89 (s, 1H), 3.18-3.26 (m, 5H), 3.31-3.35 (m, 2H), 3.51-3.55 (m, 2H), 3.66-3.70 (m, 3H), 4.01-4.06 (m, 1H), 7.00-7.04 (m, 2H), 7.10-7.13 (m, 2H), 7.17-7.21 (m, 1H), 7.41 (s, 1H), 8.31 (s, 2H), 8.79-8.82 (m, 2H).

Provenance & Evidence