反应条件
1.1: oxalyl dichloride / N,N-dimethyl-formamide / dichloromethane / 1.5 h / Reflux
2.1: triethylamine; magnesium chloride / acetonitrile / 2 h / Cooling with ice-salt bath
2.2: 20 °C / Cooling with ice-salt bath
2.3: 1.5 h / Cooling with ice
3.1: trifluoromethylsulfonic anhydride; triethylamine; triphenyl-phosphine oxide / 1,2-dichloro-ethane / 2 h / 85 °C / Inert atmosphere
View Scheme
参考文献
GLAXO GROUP LIMITED; JOHNS, Brian Alvin; SHOTWELL, John Brad
Patent: WO2012/67664 A1, 2012 ;