The novel diaza analogue 2 of DNA-gyrase inhibitor ellagic acid 1 was synthesized via the Ullmann coupling of methyl 2-bromo-3-nitroveratrate 6 which, in turn, was prepared by a 7-step synthesis from 2-bromopiperonal 10 requiring a contrived, regiospecific 3-nitration as a crucial step. Analogue 2 was two-fold as potent a DNA-Gyrase inhibitor as 1.
The novel diaza analogue 2 of DNA-gyrase inhibitor ellagic acid 1 was synthesized via the Ullmann coupling of methyl 2-bromo-3-nitroveratrate 6 which, in turn, was prepared by a 7-step synthesis from 2-bromopiperonal 10 requiring a contrived, regiospecific 3-nitration as a crucial step. Analogue 2 was two-fold as potent a DNA-Gyrase inhibitor as 1.