Dimethylformamide → 2-[1-(4-chlorophenyl)cyclobutyl]-N-[1-oxo-4-(trifluoromethyl)phthalazin-2(1H)-yl]acetamide

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A solution of the above crude 1-(1-(4-chlorophenyl)cyclobutyl)-2-diazoethanone (65.6 mg, 0.280 mmol), the product from Example 11B (0.0503 g, 0.219 mmol), triethylamine (0.12 mL, 0.86 mmol), and silver benzoate (12.4 mg, 0.054 mmol) in DMF (1 mL) was stirred for 2 hours, diluted with EtOAc, washed with saturated aqueous NaHCO3 and brine, dried (Na2SO4), and filtered. The residue was chromatographed on SiO2 (4% EtOAc/dichloromethane) to give the title compound (33.5 mg) as a white solid. 1H NMR (300 MHz, DMSO-d6) δ ppm 11.50 (s, 1H), 8.41 (dd, J=7.9, 1.4 Hz, 1H), 8.09-8.15 (m, 1H), 8.02-8.07 (m, 1H), 7.97-8.02 (m, 1H), 7.30-7.34 (m, 2H), 7.21-7.24 (m, 2H), 2.80 (s, 2H), 2.44-2.49 (m, 2H), 2.26-2.39 (m, 2H), 2.06-2.21 (m, 1H), 1.70-1.84 (m, 1H); MS (ESI+) M/Z 436 (M+H)+.

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