1,2,3,4-Tetrazine → HCID 11965780, compound

Participants

Reaction Steps

A solution of 2-amino-5-ethynyl-4-trifluoromethyl-benzoic acid methyl ester (150 mg, 0.62 mmol) and tetrazine (55.7 mg, 0.68 mmol) in 1,2-dichloroethane (3 mL) in a sealed tube was heated in the microwave at 130° C. for 40 min and at 120° C. for 40 min. After cooling to r.t., the solvent was removed in vacuo. The residue was purified by flash chromatography (10 g silica gel, hexanes→EtOAc:hexanes (2:3)) to provide 2-amino-5-pyridazin-4-yl-4-trifluoromethyl-benzoic acid methyl ester (74 mg, 40%) as a solid. API-ES: m/z 298 [M+H]+, rt 3.54 min.

Provenance & Evidence