Triethylamine → tert-butyl 4-(2-hydroxyethyl)-1H-pyrazole-1-carboxylate

Participants

Reaction Conditions

Reaction Steps

1.10 g (9.81 mmol) 2-(1H-pyrazol-4-yl)-ethanol, 0.20 g (1.64 mmol) 4-dimethylaminopyridine and 1.50 ml (10.3 mmol) triethylamine were placed in 30 ml dichloromethane, the reaction mixture was cooled to 0° C. and 2.20 g (9.88 mmol) tert. butyl carbonate was slowly added. The mixture was stirred for 2 h at ambient temperature and then overnight at ambient temperature. It was diluted with 50 ml dichloromethane and washed with 10% citric acid solution and 15% potassium carbonate solution, the organic phase was dried, filtered and the solvent was eliminated from the filtrate.

Provenance & Evidence