trifluoroacetic acid in dichloromethane T=0 - 20°C; 4 h;
参考文献
CEPHALON, INC.; BRESLIN, Henry J.; CURRY, Matthew A.; GINGRICH, Diane E.; LEARN, Keith S.; OTT, Gregory R.; WAGNER, Jason C.
Patent: WO2013/116291 A1, 2013 ;
Location in patent: Page/Page column 207; 208 ;