1: 3-bromo-5-pyridine-carboxylic acid With thionyl chloride Reflux; 2: ethanol 2 h; Reflux; 3: With sodium hydrogencarbonate in dichloromethane; water pH=8;
参考文献
THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
Patent: WO2008/151073 A1, 2008 ;
Location in patent: Page/Page column 39-40; 44 ;