1: methyl 1H-indazole-4-carboxylate With sodium hydride in N,N-dimethyl-formamide 0.333333 h; Cooling with ice; 2: methyl iodide in N,N-dimethyl-formamide T=20°C; 1.5 h; Cooling with ice;
参考文献
Astellas Pharma Inc.
Patent: EP2141147 A1, 2010 ;
Location in patent: Page/Page column 20 ;
EP 2141147 A1