Potassium Carbonate → 1-(4-(4,5-difluoroindoline-1-carbonyl)pyridin-2-yl)spiro[piperidine-4,4'-pyrido[2,3-d][1,3]-oxazin]-2'(1'H)-one

Participants

Reaction Conditions

Reaction Steps

0.23 g (0.78 mmol) (2-chloro-pyridin-4-yl)-(4,5-difluoro-2,3-dihydro-indol-1-yl)-methanone were added to 0.20 g (0.78 mmol) spiro[piperidine-4,4′-pyrido[2,3-d][1,3]oxazin]-2′(1′H)-one-hydrochloride and 0.11 g (0.78 mmol) potassium carbonate in 3.0 mL NMP. The reaction mixture was first of all stirred for 10 h at 130° C., then cooled to RT and then stirred overnight at RT. The crude product was combined with water/acetonitrile and purified by preparative HPLC-MS. The product fractions were combined and evaporated down. The residue was triturated with diisopropylether, suction filtered and dried in the air.

Provenance & Evidence