Diisopropylethylamine → 1-{6-[2-(methoxymethyl)-4-methyl-1H-benzo[d]imidazol-6-yloxy]pyrimidin-4-yl}spiro-(piperidin-4,4'-pyrido[2,3-d][1,3]oxazin)-2'(1'H)-one

Participants

Reaction Steps

49 mg (0.19 mmol) spiro[piperidin-4,4′-pyrido[2,3-d][1,3]oxazin]-2′(1′H)-one hydrochloride, 50 mg (0.16 mmol) 6-(6-chloropyrimidin-4-yloxy)-2-(methoxymethyl)-4-methyl-1H-benzo-[d]imidazole and 0.10 mL (0.57 mmol) DIPEA in 2.0 mL DMF were stirred at 40° C. over the weekend. The reaction mixture was purified by preparative HPLC-MS. The fractions containing product were partially evaporated down i.vac. and neutralised with 4M sodium hydroxide solution. The precipitate formed was suction filtered, washed and dried.

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