Phosphorus trichloride → N-(6-ethoxy-pyridin-3-yl)-2-[4-(1H-indol-3-ylmethyl)-5-oxo-1-phenyl-4,5-dihydro-2,3,6,10b-tetraaza-benzo[e]azulen-6-yl]-N-isopropyl-acetamide

Participants

Reaction Steps

Following the procedure described for Example 2(A), [4-(1H-indol-3-ylmethyl)-5-oxo-1-phenyl-4,5-dihydro-2,3,6,10b-tetraaza-benzo[e]azulen-6-yl]-acetic acid (Preparation 15) (300 mg, 0.65 mmol) was reacted with (6-ethoxy-pyridin-3-yl)-isopropyl-amine (Preparation 2(B)) (117 mg, 0.65 mmol) and PCl3 in dichloroethane at 100° C. Purification by medium pressure chromatography eluting with a solvent gradient (5% of 0.5% NH4OH/MeOH in CH2Cl2 to 10% of 0.5% NH4OH/MeOH in CH2Cl2) provided 85.1 mg of N-(6-ethoxy-pyridin-3-yl)-2-[4-(1H-indol-3-ylmethyl)-5-oxo-1-phenyl-4,5-dihydro-2,3,6,10b-tetraaza-benzo[e]azulen-6-yl]-N-isopropyl-acetamide. 1H NMR (CD3OD) δ 8.05 (d, 1H), 7.62 (m, 3H), 7.38-7.52 (m, 6H), 7.24 (d, 1H), 7.11 (m, 2H), 6.99 (t, 1H), 6.89 (m, 3H), 4.78 (m, 1H), 4.53 (m, 1H), 4.35 (q, 2H), 4.12 (m, 1H), 3.88 (t, 1H), 3.78 (dd, 1H), 3.69 (dd, 1H), 1.38 (t, 3H), 0.99 (m, 6H); MS 626.7 (M+1), 624.6 (M−1).

Provenance & Evidence