Diisopropylethylamine → (S)-tert-butyl 2-methyl-4-(5-methyl-7H-pyrrolo[2,3-d]pyrimidin-4-yl)piperazine-1-carboxylate

Participants

Reaction Conditions

Reaction Steps

(S)-tert-butyl 2-methylpiperazine-1-carboxylate (3 g, 15 mmol), N,N-diisopropylethylamine (3 ml), and 4-chloro-5-methyl-7H-pyrrolo[2,3-d]pyrimidine (2 g, 12 mmol) were added to isopropanol (10 ml). The solution was heated at 120° C. in a sealed pressure tube for 12 hours. The reaction was concentrated under vacuum, and the residue was purified by flash chromatography (80 g SiO2, 0-5% MeOH: CH2Cl2, 50 min) to give clean (S)-tert-butyl 2-methyl-4-(5-methyl-7H-pyrrolo[2,3-d]pyrimidin-4-yl)piperazine-1-carboxylate (1.5 g, 4.5 mmol, 38%).

Provenance & Evidence