Diisopropylethylamine → (S)-N-cyclopropyl-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

Participants

Reaction Conditions

Reaction Steps

(S)-3-(hydroxymethyl)-6a,7,8,9-tetrahydropyrido[3,2-e]pyrrolo[1,2-a]pyrazin-6(5H)-one (300 mg, 1.368 mmol), N-cyclopropyl-4-(piperazin-1-yl)benzamide (336 mg, 1.368 mmol), (cyanomethyl)trimethylphosphonium iodide (499 mg, 2.053 mmol) and N,N-diisopropylethylamine (1195 μl, 6.84 mmol) were suspended in propionitrile (Volume: 4109 μl) and heated in a closed vial at 120° C. for 2 h. The reaction mixture became a dark brown solution. It was cooled to room temperature, concentrated in vacuo, dissolved in DMSO (2 mL) and purified using HPLC (NH4HCO3 buffered, 20-70% ACN in water). The fractions were concentrated in vacuo and the resulting solid was recrystallized from water-MeOH (1:1, 15 mL), and then from MeOH:EtOH:water (1:1:1, 10 mL), washed with water (3 mL) and dried in vacuum to give a light green solid.

Provenance & Evidence