Dimethylamine → N'-(2-((3-Cyclopropyl-4-fluorobenzyl)carbamoyl)-3-hydroxy-4-oxo-6,7,8,9-tetrahydro-7,10-ethanopyrimido[1,2-a]azepin-10(4H)-yl)-N,N-dimethylethanediamide

Participants

Reaction Conditions

Reaction Steps

A suspension of ethyl 10-(((dimethylamino)(oxo)acetyl)amino)-4-oxo-3-((phenylcarbonyl)oxy)-4,6,7,8,9,10-hexahydro-7,10-ethanopyrimido[1,2-a]azepine-2-carboxylate (0.025 g, 0.050 mmol) and dimethylamine (0.050 mL, 0.101 mmol) (2 M in methanol) in ethanol (1 mL) was stirred at 50° C. for 1 h. Added to the mixture were (3-cyclopropyl-4-fluorophenyl)methanamine hydrochloride salt (0.025 g, 0.126 mmol) and triethylamine (0.070 mL, 0.504 mmol) and the mixture stirred at 90° C. for 5 h. The mixture was cooled to room temperature and concentrated. The brown residue was purified by preparative HPLC: Solvent A=10% ACN/90% H2O/0.1% trifluoroacetic acid; Solvent B=90% ACN/10% H2O/0.1% trifluoroacetic acid; Start % B=0; Final % B=100; Gradient time=20 min; Stop time=23 min; Column=Sunfire 19×100 mm, C18, 5 μm. The resulting purple solid was triturated with hot methanol to give the title compound as a white solid (6.0 mg, 21% yield). 1H NMR (500 MHz, CDCl3) δ: 12.03 (1 H, s), 8.56 (1 H, t, J=5.49 Hz), 8.15 (1 H, s), 7.11-7.20 (1 H, m), 6.85-7.01 (2 H, m),4.49 (2 H, d, J=6.10 Hz), 4.16 (2 H, d, J=3.97 Hz), 3.28 (3 H, s), 2.91 (3 H, s), 2.42-2.65 (3 H, m), 2.01-2.18 (3 H, m), 1.86-2.00 (2 H, m), 1.71 (2 H, ddd, J=13.28, 6.56, 6.41 Hz), 0.90-1.02 (2 H, m), 0.67-0.80 (2 H, m). LCMS (M+H) calcd for C26H31FN5O5: 512.23; found: 512.24.

Provenance & Evidence