Methyl DL-prolinate → HCID 78324583, compound

Participants

Reaction Steps

To a stirred solution of 5-(4-(benzylamino)-5-phenylpyrrolo[2,1-f][1,2,4]triazin-2-yl)nicotinic acid (80.0 mg, 0.190 mmol) (prepared as in Example 12) in DMF (2 mL), were added DMAP (35.0 mg, 0.285 mmol) and HATU (108 mg, 0.285 mmol) and the reaction mixture was stirred for 10 minutes. Methyl pyrrolidine-2-carboxylate (12.0 g, 0.0950 mmol) was added and the reaction mixture was stirred at room temperature for 14 h. The reaction mixture concentrated under reduced pressure to remove DMF and to the resulting residue water (10 mL) was added. The aqueous mixture was extracted with CH2Cl2 (15×2 mL). The combined organic layers were dried over anhydrous sodium sulfate and concentrated under reduced pressure. The residue was purified by preparative HPLC (Condition B-68 as described in general methods) to obtain methyl 1-(5-(4-(benzylamino)-5-phenylpyrrolo[2,1-f][1,2,4]triazin-2-yl)nicotinoyl)pyrrolidine-2-carboxylate (30.0 mg, 59.3%). LCMS Condition B-14: retention time 2.31 min, [M−1]=531.2. HPLC Condition B-63: retention time 16.30 min, Purity 99.70%. 1H NMR (400 MHz, DMSO-d6) δ ppm 1.87-1.98/2.30-2.35 (m, 4H), 3.44/3.70 (s, 3H), 3.55/3.67 (dd, J=6.0 Hz, J=6.8 Hz, 2H), 4.47-4.49/4.56-4.58 (m, 1H), 4.54/4.82 (d, J=5.6 Hz, 2H), 6.71/6.76 (t, J=5.6 Hz, 1H), 6.82 (d, J=2.8 Hz, 1H), 7.23-7.56 (m, 10H), 7.91/7.94 (d, J=2.8 Hz, 1H), 8.44/8.58 (t, J=2.0 Hz, 1H), 8.65/8.81 (d, J=2.0 Hz, 1H), 9.39/9.44 (d, J=2.0 Hz, 1H). Molecule exists as two rotomers with ratio 70/30.

Provenance & Evidence