Synthesis of 1-substituted 3-nitroquinolin-4(1<i>H</i>)-ones
作者:Stanislav Radl、Ka-Kong Chan
DOI:10.1002/jhet.5570310232
日期:1994.3
synthetic method for preparing 1-substituted 3-nitroquinolin-4(1H)-ones from corresponding 2-fluoro-α-nitroacetophenones is demonstrated by the synthesis of 6,7-difluoro derivatives 7a-c. The method involves sequential treatment of the starting nitroacetophenone with triethyl orthoformate and the appropriate amine, followed by a nucleophilic cyclization reaction under mild conditions. The C-7 fluorine atom