反应详情

温度

50 °C

A mixture of 3-(2-amino-7,8-dihydropyrido[4,3-d]pyrimidin-6(5H)-yl)benzoic acid (41 mg, 0.15 mmol), N,N-diisopropylethylamine (0.105 mL, 0.60 mmol), and HBTU (63 mg, 0.165 mmol) in 1.5 mL DMF was briefly warmed to approx. 50° C. to dissolve solids, then continued stirring at room temperature. After 10 minutes 4-ethylaniline (0.028 mL, 0.225 mmol) was added and the reaction stirred at room temperature for 4 hours, then allowed to stand at room temperature overnight. The reaction was added drop wise to a stirring mixture of 35 mL water containing 4 mL brine and 0.3 mL saturated aqueous Na2CO3 solution at room temperature. The resulting precipitate was filtered and rinsed with water. The damp solid was dissolved in 40% MeOH in CHCl3 and evaporated to a dry solid. The solid was triturated with an acetone/hexane mixture to give the title compound as a light beige solid (48 mg, 86%). 1H NMR (DMSO-d6) δ: 10.08 (s, 1H), 8.13 (s, 1H), 7.63-7.69 (m, 2H), 7.50 (s, 1H), 7.31-7.40 (m, 2H), 7.15-7.24 (m, 3H), 6.41 (s, 2H), 4.29 (s, 2H), 3.65 (t, J=6.0 Hz, 2H), 2.77 (t, J=5.9 Hz, 2H), 2.58 (q, J=7.5 Hz, 2H), 1.18 (t, J=7.6 Hz, 3H).

1. dissolutionto dissolve solids
2. stirringthe reaction stirred at room temperature for 4 hours
3. additionThe reaction was added drop
4. filtrationThe resulting precipitate was filtered
5. washrinsed with water
6. dissolutionThe damp solid was dissolved in 40% MeOH in CHCl3
7. customevaporated to a dry solid
8. customThe solid was triturated with an acetone/hexane mixture