Thermochemical reaction of 7-azido-1-ethyl-6,8-difluoroquinolone-3-carboxylate with heterocyclic amines. An expeditious synthesis of novel fluoroquinolone derivatives

Heterocyclic amines: R2NH: 6a: 5-fluorouracil, 54%; 6b: uracil, 51%; 6c: 5-aminouracil, 56%; 6d: 2-aminopyrimidine, 50%; 6e: 3,5-diamino-1,2,4-triazole, 57%.