Potassium Carbonate → Ethyl {4-[3-(trifluoromethyl)-4,5,6,7-tetrahydro-1H-indazol-1-yl]phenyl}acetate

Participants

Reaction Conditions

Reaction Steps

A mixture of ethyl-4-bromophenylacetate (875 mg, 3.60 mmol), 3-(trifluoromethyl)-4,5,6,7-tetrahydro-1H-indazole (570 mg, 3.00 mmol), potassium carbonate (842 mg, 6.10 mmol), copper (I) iodide (5 mol %, 29 mg, 0.15 mmol), and (1R,2R)—N,N′-dimethyl-1,2-cyclohexanediamine (20 mol %, 85 mg, 0.60 mmol) in toluene (2 ml) was stirred under an atmosphere of argon at 130° C. in a microwave reactor for 1 h. Further copper (I) iodide (10 mg, 0.05 mmol), and (1R,2R)—N,N′-dimethyl-1,2-cyclohexanediamine (30 mg, 0.21 mmol) was added and heating continued at 130° C. for a total of 4 h. The reaction mix was cooled and added to a 20 g pre-packed silica column and eluted with 0-20% ethyl acetate in petroleum ether to give the title compound as a brown oil (0.92 g, 87%).

Provenance & Evidence