Abstract: 4-Hydroxy-2-quinolones 1 are generally found to be converted to the
4-azidocompounds 3 via the 4-chloroquinolones 2, the
4-tosyloxyquinolones 6 or teh 4-aminoquinolones 4, respectively.
Choice of the reaction conditions and yields depend on the substituent in position 3
of the quinolihne nucleus. For comparison the O-analogous coumarin derivatives 9
have been studied to give the 4-azidoderivatives 11 via the
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