Gn. Lipunova et al., 1,3,4-OXA(THIA)DIAZINO [I,J]-ANNELATED QUINOLINES - A NEW-TYPE OF KEYINTERMEDIATE IN THE SYNTHESIS OF TRICYCLIC FLUOROQUINOLONES, Mendeleev communications (Print), (4), 1998, pp. 131-133
The synthesis of new derivatives of 1,3,4-oxa(thia)diazino[6,5,4-i,j]-
quinolines, which have a structure that is very similar to the ofloxac
in skeleton, by intramolecular cyclizations of ethyl 3-(R-carbonylhydr
azino)- and 3- (R-thiocarbonylhydrazino)-substituted 2-polyfluorobenzo
yl acrylates, is described.