反应详情

To a mixture of 5-amino-2-[1-methyl-3-(trifluoromethyl)pyrazol-5-yl]-1,3-thiazole (66, 8.1 mg, 0.03 mmol) in 1 ml DCM were added 2-chlorobenzoyl chloride (3.8 μl, 2 eq), DIEA (52 μl, 3 eq) and DMAP (2 mg). After stirred at r.t for 2 h, the reaction mixture was worked up with DCM/aq. NaCO3, the DCM phase was concentrated to dryness. The solid residue was dissolved in 1 ml THF/MeOH/H2O (5:4:1). 0.06 ml of 1N NaOH were added and mixture was stirred at r.t for 1 h before worked up DCM//aq. NaCO3. DCM phase was concentrated and subjected to prep HPLC purification to give 3.7 mg of (2-chlorophenyl)-N-{2-[1-methyl-3-(trifluoromethyl)pyrazol-5-yl](1,3-thiazol-5-yl)}carboxamide (67) as yellow solid (yield: 31.9%; purity>90%). LC-MS: calcd. for C15H10ClF3N4OS: 387 (M+1).

1. concentrationNaCO3, the DCM phase was concentrated to dryness
2. dissolutionThe solid residue was dissolved in 1 ml THF/MeOH/H2O (5:4:1)
3. addition0.06 ml of 1N NaOH were added
4. stirringmixture was stirred at r.t for 1 h
5. concentrationDCM phase was concentrated
6. customHPLC purification