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Synthesis of 6,8-substituted-5,7-difluoro-3,4-dihydro-1H-quinoxalin-2-ones via reductive cyclisation of 2,4,6-substituted-3,5-difluoronitrobenzenes

✍ Scribed by Richard J. Holland; Ian R. Hardcastle; Michael Jarman

Publisher
Elsevier Science
Year
2002
Tongue
French
Weight
91 KB
Volume
43
Category
Article
ISSN
0040-4039

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## Abstract The reaction of 6‐chloro‐2‐(1‐methylhydrazino)quinoxaline 4‐oxide 8 with acetic anhydride resulted in the intramolecular cyclization to give 8‐chloro‐2,4‐dimethyl‐4__H__‐1,3,4‐oxadiazino[5,6‐__b__]quinoxaline 7a, while the reaction of compound 8 with acetic anhydride/pyridine or acetic