1: 1-bromo-4-fluorobenzene With n-butyllithium; diisopropylamine in tetrahydrofuran; hexane T=-70 - -60°C; 2.75 h; 2: CHF2COOEt With hydrogenchloride in tetrahydrofuran; water T=-40°C;
参考文献
NOVARTIS AG
Patent: US2012/172359 A1, 2012 ;
Location in patent: Page/Page column 43 ;