Diisopropylethylamine → (1R,2S,5R)-5-Methyl-2-(propan-2-yl)cyclohexyl N-[(1S,2S)-2-methyl-2-{[5-(trifluoromethyl)pyrazin-2-yl]amino}cyclopentyl]carbamate

Participants

Reaction Steps

A solution of (1R,2S,5R)-5-methyl-2-(propan-2-yl)cyclohexyl N-(2-amino-2-methylcyclopentyl)carbamate hydrochloride (5.14 g, 15.44 mmol), 2-chloro-5-(trifluoromethyl)pyrazine (CAS number 799557-87-2; 2.097 ml, 16.98 mmol) and DIPEA (8.10 ml, 46.32 mmol) in DMSO (51.5 ml) was heated to 140° C. for 17 hours. The reaction mixture was diluted with water (200 ml) and extracted with ethyl acetate (2×200 ml). The combined organics were washed with brine (3×200 ml), dried over magnesium sulfate and concentrated in vacuo. The residue was purified by column chromatography (silica, 0-15% ethyl acetate/petrol) to afford the title compound as a single diastereomer.

Provenance & Evidence