Triethylamine → N-(5-Bromo-4-(1-methylpiperidin-4-ylamino)pyridin-2-yl)pivalamide

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Reaction Steps

N-(5-Bromo-4-chloropyridin-2-yl)pivalamide (Synthesis 155-A) (1.08 g, 3.70 mmol), benzyl 4-aminopiperidine-1-carboxylate (1.736 g, 7.41 mmol), and triethylamine (1.041 mL, 7.41 mmol) in NMP (7.41 mL) in a sealed vial was heated to 210° C. by microwave irradiation for 1.5 hr. The cooled solution was diluted with MeOH and purified by ion exchange on Isolute SCX II acidic resin eluting with MeOH then 2M NH3 in MeOH. He basic fractions were combined and volatiles were removed in vacuo. The crude product was dissolved in dichloromethane and loaded onto a Biotage silica column. Flash column chromatography eluting with a gradient of EtOAc in hexanes gave N-(5-bromo-4-(1-methylpiperidin-4-ylamino)pyridin-2-yl)pivalamide (0.536 g, 1.095 mmol, 30%) as a clear glass.

Provenance & Evidence