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