Triethylamine → HCID 86691191, compound

Participants

Reaction Conditions

Reaction Steps

Ethyl chloroformate (5.8 mL, 62 mmol) was added to a solution of (trans)-2-(6-bromopyridin-3-yl)cyclopropanecarboxylic acid hydrochloride (Intermediate H, 5 g, 20.7 mmol) and Et3N (14.2 mL, 103.7 mmol) in Acetone (100 mL) at −5° C., then reaction mixture was stirred at −5° C. for 1 h, then a solution of NaN3 (2.7 g, 41.4 mmol) in water (10 mL) was added and stirred for 30 mins at RT. After completion the solvent was evaporated under vacuum. The crude residue was dissolved in ethyl acetate (200 mL), washed with water (80 mL), brine (80 mL), dried over anhydrous Na2SO4, filtered and evaporated to get (trans)-2-(6-bromopyridin-3-yl)cyclopropanecarbonyl azide (2.5 g, 45.5%) as a brown color gummy liquid.

Provenance & Evidence