Diisopropylethylamine → 5-(4-(4-Cyanophenyl)piperidine-1-carbonyl)-2-methyl-N-(6-(pyrrolidin-1-yl)pyridin-3-yl)benzamide

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A mixture of compound 39.3 (528 mg, 1.52 mmol, 1.00 equiv) and HBTU (635 mg, 2.28 mmol, 1.50 equiv) in DMF (30 mL) was stirred for 30 min at room temperature. To this was added 6-(pyrrolidin-1-yl)pyridin-3-amine (compound 41.2, 299 mg, 1.82 mmol, 1.20 equiv) and DIEA (50 mg). The resulting mixture was stirred overnight at 60° C. in an oil bath. After cooling to room temperature, the reaction mixture was diluted with 50 mL of EtOAc and washed with 2×30 mL of NH4Cl (aq., sat.) followed by 2×30 mL of sodium bicarbonate (aq., sat.). The organic layer was dried over anhydrous sodium sulfate and concentrated under reduced pressure. The crude product was purified by Prep-HPLC with the following conditions (1#-Pre-HPLC-016(Waters)): Column, SunFire Prep C18, 19*150 mm 5 um; mobile phase, Water with 50 mmol NH4HCO3 and CH3CN (10% CH3CN up to 32% in 3 min, up to 51% in 20 min, up to 100% in 1 min, down to 10% in 1 min); Detector, UV 220 NMnm. The fractions containing pure compound were combined and lyophilized to yield 50 mg (7%) of the title compound as a solid. m/z (ES+) 494 (M+H)+.

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