1: 9-oxo-9H-xanthene-3-carboxylic acid With thionyl chloride in dichloromethane
6 h; Heating / reflux;
2: diethylamine With sodium hydroxide in dichloromethane; water
T=0 - 20°C; 0.25 h;
参考文献
Carson, John R.; Dax, Scott L.; DeCorte, Bart; Liu, Li; McDonnell, Mark; McNally, James J.
Patent: US2006/135522 A1, 2006 ;
Location in patent: Page/Page column 20 ;
US 20060135522 A1
Carson, John R.; Dax, Scott L.; DeCorte, Bart; Liu, Li; McDonnell, Mark; McNally, James J.
Patent: US2006/135522 A1, 2006 ;
Location in patent: Page/Page column 20 ;
US 20060135522 A1