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Bis(trifluoromethyl)-substituted quinolino[8,7- h ]quinolines and quinolino[7,8- h ]quinolines have been prepared from 3-substituted 1-CF 3 -prop-2-yne 1-iminium triflate salts and 1,5- and 1,8-diaminonaphthalene, respectively, by a twofold pyridoannelation sequence. These transformations do not require any additional reagent and can be performed at remarkable mild thermal conditions.

A convenient synthesis of trifluoromethyl-substituted quinolino[8,7- h ]quinolines and quinolino[7,8- h ]quinolines