Ethyl Acetate → tert-butyl(3S)-3-{[6-chloro-5-(2-hydroxyethyl)-2-(methylsulfanyl)pyrimidin-4-yl]amino}-3-methylpyrrolidine-1-carboxylate

Participants

Reaction Conditions

Reaction Steps

To a solution of 2-[4,6-dichloro-2-(methylsulfanyl)pyrimidin-5-yl]ethanol (1.25 g, 5.23 mmol) and tert-butyl(3S)-3-amino-3-methylpyrrolidine-1-carboxylate (1.57 g, 7.84 mmol) in DMSO (13 mL) was added DIEA (4.6 mL, 26.1 mmol) at room temperature. The reaction mixture was stirred at 110° C. for 42 h, whereupon the mixture was poured into EtOAc and washed with water. The water layer was extracted with EtOAc (3 times). The combined organic layers were washed with brine, dried over Na2SO4, filtered and concentrated. The residue was purified via ISCO normal phase silica gel chromatography (80 g column) eluting with a 0-100% gradient of EtOAc/Heptane to give the title compound (1.37 g, 65%) as a light yellow-white foamy solid. 1H NMR (400 MHz, DMSO-d6) δ 6.96 (d, J=17.0 Hz, 1 H), 5.06 (br s, 1 H), 3.75 (dd, J=20.6, 11.2 Hz, 1 H), 3.54 (br s, 2 H), 3.50-3.33 (m, 3 H), 2.77 (t, J=6.3 Hz, 2 H), 2.44 (s, 3 H), 2.40-2.23 (m, 1 H), 2.03-1.93 (m, 1 H), 1.47 (d, J=11.1 Hz, 3 H), 1.38 (d, J=13.4 Hz, 9 H). m/z (APCI+) for C17H27ClN4O3S 403.9 (M+H)+.

Provenance & Evidence