反应详情

tert-Butyl 4-(1-(4-bromo-3-fluorophenyl)-3-carbamoyl-6-oxo-1,6-dihydropyridazin-4-yloxy)piperidine-1-carboxylate was prepared in 100% yield according to procedures described in Example 31 (Step A) substituting methyl 441-(tert-butoxycarbonyl)piperidin-4-yloxy)-1-(4-(methylsulfonyl)phenyl)-6-oxo-1,6-dihydropyridazine-3-carboxylate for methyl 1-(4-bromo-3-fluorophenyl)-4-(1-(tert-butoxycarbonyl)piperidin-4-yloxy)-6-oxo-1,6-dihydropyridazine-3-carboxylate (Example 43). MS (ESI) 511 (M+H).