反应详情

6-(Tetrazol-5-yl)spiro[chroman-2,4′-piperidin]-4-one hydrochloride (42 mg), 1-hydroxybenzotriazole monohydrate (20 mg), 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (25 mg), triethylamine (21 μL) and water (1 mL) were added in that order to a DMF (3 mL) solution of 2-methoxy-6-phenyl-isonicotinic acid (25 mg), and stirred at room temperature for 2 hours. Water was added to the reaction liquid, the formed precipitate was taken out through filtration, washed with water, and dried to obtain the title compound as a white solid. 1H-NMR (400 MHz, DMSO-d6) δ: 8.41 (1.0H, d, J=2.0 Hz), 8.23 (1.0H, dd, J=8.6, 2.4 Hz), 8.13 (2.0H, d, J=6.8 Hz), 7.57 (1.0H, br s), 7.51-7.44 (3.0H, m), 7.32 (1.0H, d, J=8.6 Hz), 6.78 (1.0H, br s), 4.31-4.27 (1.0H, m), 3.97 (3.0H, s), 3.40-3.20 (3.0H, m), 2.97 (2.0H, s), 2.10-2.05 (1.0H, m), 1.90-1.83 (3.0H, m). MS [M−H]−=495.

1. filtrationthe formed precipitate was taken out through filtration
2. washwashed with water
3. customdried