Cyclization of Some 2,3,5,6-Tetrafluorophenylhydrazine Derivatives. Use of Nuclear Overhauser Effect Measurements in Structural Assignment

1 September 1975

journal article
Published by Canadian Science Publishing in Canadian Journal of Chemistry

Vol. 53 (17) , 2534-2536
https://doi.org/10.1139/v75-361

Abstract

Treatment of N-(2,3,5,6-tetrafluorophenyl)-N′-thiobenzoylhydrazine and of N-benzoyl-N′-(2,3,5,6-tetrafluorophenyl)hydrazine with acetic anhydride and triethylamine proceed without rearrangement to give 4-acetyl-2-phenyl-5,6,8-trifluoro-4H-1,3,4-benzthiadiazine and -benzoxadiazine, respectively. Structures follow from ¹⁹F n.m.r. and n.O.e. data.

Keywords

TREATMENT
STRUCTURAL
ACETYL
GIVE
N.M.R
PROCEED
N.O.E
BENZTHIADIAZINE
TETRAFLUOROPHENYLHYDRAZINE

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