Sodium Carbonate → 2-[1-Methyl-3-(trifluoromethyl)pyrazol-5-yl]-5-nitro-1,3-thiazole

Participants

Reaction Conditions

Reaction Steps

A mixture of 2-bromo-5-nitrothiazole (209 mg, 1 mmol), (1-methyl-3-(trifluoromethyl)-1H-pyrazol-5-yl)boronic acid (194 mg, 1 mmol), tetrakis(triphenylphosphine)-palladium(0) (Pd(Ph3P)4, 57 mg) and sodium carbonate (212 mg) in 3 ml DME, 0.5 ml EtOH and 0.5 ml water was heated under Ar in microwave reactor at 110° C. for 30 min. The reaction mixture was worked up with EA/brine. Org. phase was concentrated and then subjected to silica gel flash chromatography (0-30% B; A: hexane; B: 50% EA in hexane) to furnish 37.5 mg of 2-[1-methyl-3-(trifluoromethyl)pyrazol-5-yl]-5-nitro-1,3-thiazole (65) as light yellow solid (yield: 13.5%; purity>90%).

Provenance & Evidence