Pyridine → Isopropyl (5-(4-(benzylamino)-5-phenylphthalazin-1-yl)pyridin-3-yl)carbamate

Participants

Reaction Steps

To a solution of 4-(5-aminopyridin-3-yl)-N-benzyl-8-phenylphthalazin-1-amine (60.0 mg, 0.149 mmol) in DCM (20 mL) was added pyridine (0.241 mL, 0.297 mmol) at room temperature followed by isopropyl carbonochloridate (18.2 mg, 0.149 mmol) and the reaction mixture stirred for 5 h. The volatile components were removed under reduced pressure and the resulting residue was purified by preparative HPLC (Condition 23 as described in general methods) to afford isopropyl (5-(4-(benzylamino)-5-phenylphthalazin-1-yl)pyridin-3-yl)carbamate (50.0 mg, 68.7%) as a white solid. LCMS (Condition 4): retention time 2.60 min, [M+1]=490.2. HPLC (Condition 28): retention time=7.65 min, purity 99.27%. 1H NMR (400 MHz, DMSO-d6) δ 1.29 (d, J=6.4 Hz, 6 H), 4.51 (d, J=4.8 Hz, 2 H), 4.93 (sept, J=6.4 Hz, 1 H), 5.06 (dd, J=4.8 Hz, J=5.2 Hz, 1 H), 7.01-7.03 (m, 2 H), 7.21-7.28 (m, 3 H), 7.42-7.52 (m, 5 H), 7.69 (dd, J=1.2 Hz, J=6.8 Hz, 1 H), 7.85-7.93 (m, 2 H), 8.16 (br s, 1 H), 8.47 (d, J=1.6 Hz, 1 H), 8.80 (d, J=2.4 Hz, 1 H), 10.00 (s, 1 H).

Provenance & Evidence