Diisopropylethylamine → (S)-N-ethyl-4-(4-((6-oxo-5,6,6a,7,8,9-hexahydropyrido[3,2-e]pyrrolo[1,2-a]pyrazin-3-yl)methyl)piperazin-1-yl)benzamide

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To a suspension of (S)-3-(hydroxymethyl)-6a,7,8,9-tetrahydropyrido[3,2-e]pyrrolo[1,2-a]pyrazin-6(5H)-one (0.8 g, 3.65 mmol)) in propiononitrile (Volume: 27.4 ml) was added (cyanomethyl)trimethylphosphonium iodide (1.064 g, 4.38 mmol), N-ethyl-4-(piperazin-1-yl)benzamide (0.851 g, 3.65 mmol) and DIEA (1.912 ml, 10.95 mmol). The vial was heated to 90° C. for 16 hours. The crude reaction was cooled to RT, DMSO (1 ml) was added, and the mixture was purified via HPLC (55-90, basic) to give the product as a white solid.

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