Diisopropylethylamine → N-cyclopropyl-4-(4-((6-oxo-5,6-dihydropyrido[2,3-e]pyrrolo[1,2-c]pyrimidin-3-yl)methyl)piperazin-1-yl)benzamide

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To a suspension of 3-(hydroxymethyl)pyrido[2,3-e]pyrrolo[1,2-c]pyrimidin-6(5H)-one (25 mg, 0.116 mmol), N-cyclopropyl-4-(piperazin-1-yl)benzamide (35.6 mg, 0.145 mmol) and (cyanomethyl)trimethylphosphonium iodide (45.2 mg, 0.186 mmol) in Propiononitrile (Volume: 1.0 mL) was added N-ethyl-N-isopropylpropan-2-amine (0.101 mL, 0.581 mmol) at 23° C. The reaction was stirred at 95° C. for 6 hr. The suspension was cooled to 23° C., filtered, rinsed with ACN (3×1 mL) and dried in vacuo to provide N-cyclopropyl-4-(4-((6-oxo-5,6-dihydropyrido[2,3-e]pyrrolo[1,2-c]pyrimidin-3-yl)methyl)piperazin-1-yl)benzamide (0.0355 g, 0.080 mmol, 69.1% yield) as an off-white solid. 1H NMR (400 MHz, DMSO-d6) δ ppm 0.47-0.59 (m, 2 H) 0.59-0.70 (m, 2 H) 2.52-2.59 (m, 4 H) 2.79 (tq, J=7.36, 3.94 Hz, 1 H) 3.19-3.31 (m, 4 H) 3.62 (s, 2 H) 6.70-6.78 (m, 1 H) 6.93 (d, J=9.09 Hz, 2 H) 7.07 (dd, J=3.66, 1.64 Hz, 1 H) 7.58 (d, J=1.77 Hz, 1 H) 7.66-7.68 (m, 1 H) 7.68-7.73 (m, 2 H) 8.14 (d, J=4.29 Hz, 1 H) 8.36 (d, J=1.77 Hz, 1 H) 11.62 (br. s., 1 H). ESI-MS: m/z 443.4 (M+H)+. mp=269.9-271.7° C.

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