반응 #578412

반응 방정식

4-bromo-1-chloro-2-(trifluoromethyl)benzene

4-amino-2-chloro-5-methylpyrimidine

cesium carbonate

→

2-chloro-N-(4-chloro-3-(trifluoromethyl)phenyl)-5-methylpyrimidin-4-amine

수율 62.1%

용매

dioxane

반응 조건

후처리

1. 1
   온도was heated
2. 2
   온도under refluxed for 10 h under argon
3. 3
   기타The solvent was removed
4. 4
   기타the residue was purified by HPLC

실험 절차

A mixture of 4-bromo-1-chloro-2-(trifluoromethyl)benzene (259 mg, 1.0 mmol), 4-amino-2-chloro-5-methylpyrimidine (143 mg, 1.0 mmol), Pd2(dba)3 (9 mg, 0.01 mmol), xantphos (14 mg, 0.02 mmol) and cesium carbonate (650 mg, 2.0 mmol) in dioxane (15 mL) was heated under refluxed for 10 h under argon. The solvent was removed and the residue was purified by HPLC to give an intermediate 2-chloro-N-(4-chloro-3-(trifluoromethyl)phenyl)-5-methylpyrimidin-4-amine as brown solid (200 mg, 62%). A mixture of this intermediate (161 mg, 0.5 mmol) and 4-(2-(pyrrolidin-1-yl)ethoxy)benzenamine (103 mg, 0.5 mmol) in glacial acetic acid (5 mL) was heated under refluxed for 3 h under argon. The crude reaction mixture on purification using HPLC gave the title compound as brown solid (75 mg, 31%).

출처