Elemental fluorine. Part 10.1 Selective fluorination of pyridine, quinoline and quinoxaline derivatives with fluorine–iodine mixtures
作者:Richard D. Chambers、Mandy Parsons、Graham Sandford、Christopher J. Skinner、Malcolm J. Atherton、John S. Moilliet
DOI:10.1039/a809838g
日期:——
Selectivefluorination of a range of pyridine and quinoline substrates to give corresponding 2-fluoro-derivatives can be readily achieved in high yield at room temperature using elemental fluorine–iodine mixtures. Reaction of fluorine with iodine forms, in situ, systems that function like sources of both iodonium and fluoride ions and fluorination of heterocyclic derivatives is suggested to proceed
Reaction of quinoxalin-2-ones with difluorocarbene
作者:Katsushi Morimoto、Kenzi Makino、Gozyo Sakata
DOI:10.1016/s0022-1139(00)80339-5
日期:1992.12
The reaction of quinoxalin-2-ones (1) with difluorocarbene derived from chlorodifluoro- methane(CHClF2) has afforded 2-difluoromethoxyquinoxalines (2), 1-difluoromethyl- quinoxalin-2-ones (3) and 2-fluoroquinoxalines (4), and with difluorocarbene from dibromodifluoromethane (CBr2F2) afforded 2-bromodifluoromethoxyquinoxalines (5), (2) and (4). Compounds 2 and 5 were readily converted into 4 under basic