反应详情

To a mixture of (5-methoxypyridin-2-yl)acetic acid (SM-1aa), 28 mg, 0.17 mmol) in dichloromethane (5 mL) was added 1,1′-carbonyldiimidazole (28 mg, 0.17 mmol) and the reaction was stirred for 2 hours at room temperature. In a separate flask, triethylamine (68 mg, 0.67 mmol) was added to a mixture 5-[(R)-1-(2,7-diaza-spiro[3.5]non-2-yl)-indan-5-yl]-pyridine-2-carbonitrile dihydrochloride (4-1d, 58 mg, 0.17 mmol) in dichloromethane (5 mL). The activated acid was added to the amine solution and the reaction was stirred at room temperature overnight. The reaction mixture was quenched by the addition of 10 mL of saturated NaHCO3 and diluted with 50 mL of dichloromethane. The organic solution was collected, washed with saturated brine, dried over MgSO4, filtered and concentrated. Purification by preparative HPLC (on Phenomenex Luna (2) C18 21.2×150 mm, 5% H20/95% MeOH (0.1% formic acid), 10.0 min, 28 mL/min) provided the title compound (7.5 mg, 9%) as a gum. MS (ES+) 494.1 (M+H)+ 1H NMR (CD3OD) δ 1.76-1.87 (m, 4H), 2.14-2.26 (m, 1H), 2.55 (dd, 1H), 3.00-3.12 (m, 1H), 3.18-3.27 (m, 1H), 3.54-3.60 (m, 4H), 3.81-3.85 (m, 4H), 3.86 (s, 1H), 4.04 (d, 2H), 4.18 (d, 2H), 4.94 (dd, 1H), 7.22-7.29 (m, 1H), 7.31-7.38 (m, 1H), 7.63-7.72 (m, 2H), 7.75 (s, 1H), 7.93 (dd, 1H), 8.13 (d, 1H), 8.23 (dd, 1H), 8.97 (d, 1H).

1. stirringthe reaction was stirred at room temperature overnight
2. customThe reaction mixture was quenched by the addition of 10 mL of saturated NaHCO3
3. additiondiluted with 50 mL of dichloromethane
4. customThe organic solution was collected
5. washwashed with saturated brine
6. dry with materialdried over MgSO4
7. filtrationfiltered
8. concentrationconcentrated
9. customPurification by preparative HPLC (on Phenomenex Luna (2) C18 21.2×150 mm, 5% H20/95% MeOH (0.1% formic acid), 10.0 min, 28 mL/min)