反应详情

To a suspension of tert-butyl 5-(2-(3-aminophenyl)quinazolin-4-ylamino)-1H-indazole-1-carboxylate (75 mg, 0.17 mmol) and dimethylcarbamic chloride (30 μL, 0.33 mmol,) in CH2Cl2 (2 mL) was added Et3N (46 μL, 0.33 mmol) and catalytic amount of DMAP. The reaction mixture was stirred at RT for 2 h after which 2 equivalents each of dimethylcarbamic chloride and Et3N were added. After 2 h of stirring another 2 equivalents of both the chloride and Et3N were added. Upon the addition of the third addition of the chloride and the Et3N the temperature was raised to 45° C. The reaction mixture was stirred for 48 h. Concentrated in vacuo and the residue was purified by flash chromatography on silica (10:1 CH2Cl2:MeOH). The product tert-butyl 5-(2-(3-(3,3-dimethylureido)phenyl)-quinazolin-4-ylamino)-1H-indazole-1-carboxylate was isolated. (62 mg, 70%)

1. additionwere added
2. additionwere added
3. concentrationConcentrated in vacuo
4. customthe residue was purified by flash chromatography on silica (10:1 CH2Cl2:MeOH)