1: formic acid; Ethyl 2-amino-3-isopropylamino-benzoate T=60°C; 0.75 h;
2: formic acid With hydrogenchloride; water
12 h; Heating / reflux;
参考文献
Barber, Christopher Gordon; Bunnage, Mark Edward; Harvey, John Wilson; Mathias, John Paul
Patent: US2005/20611 A1, 2005 ;
Location in patent: Page/Page column 29-30 ;