Carbon Dioxide → HCID 178440407, compound

Participants

Reaction Steps

To 5-bromo-3-propyl-1H-indazole (1.00 g, 4.18 mmol) in diethyl ether (60 mL), 1.3 M t-BuLi (10.9 mL, 14.2 mmol) in pentane was added slowly at −78° C. under N2 atm. After 1 hour, CO2 gas was passed through the reaction mixture at −78° C. for 1 hour and allowed to slowly warm to room temperature. The reaction mixture was quenched with saturated NH4Cl solution and the ether layer was separated. The aqueous layer was acidified with 2 N HCl and extracted with ethyl acetate to afford the title compound (350 mg, 40.8%) as an off white solid. 1H NMR (DMSO-d6): δ 11.8-13.0 (br, 1H), 8.4 (s, 1H), 7.9 (d, 1H), 7.5 (d, 1H), 3.0 (q, 2H), 1.8 (q, 2H), 0.9 (t, 3H). mp: 296-299° C.

Provenance & Evidence