Diisopropylethylamine → 1-tert-Butyl 3-methyl (3R,5S)-5-[({2-tert-butyl-4-[(1,3-oxazol-2-ylmethyl)amino]pyrimidin-5-yl}carbonyl) (2-methylpropyl)amino]piperidine-1,3-dicarboxylate

Participants

Reaction Conditions

Reaction Steps

To a solution of 1-tert-butyl 3-methyl (3R,5S)-5-{[(2-tert-butyl-4-chloropyrimidin-5-yl)carbonyl](isobutyl)amino}piperidine-1,3-dicarboxylate (0.55 g) and diisopropylethylamine (0.87 ml) in 2-propanol (5 ml) was added 2-oxazolylmethylamine hydrochloride (0.34 g), and the mixture was stirred at 80° C. for 15 hr. The reaction mixture was concentrated under reduced pressure, saturated aqueous sodium hydrogen carbonate was added, and the mixture was extracted with ethyl acetate. The extract was dried over anhydrous sodium sulfate and concentrated under reduced pressure. The obtained residue was subjected to silica gel chromatography, and the fraction eluted with hexane to ethyl acetate-hexane (1:2) was concentrated under reduced pressure to give the object compound (525 mg).

Provenance & Evidence