Short communication, Note

The Synthesis and Structure Determination of Tetrasubstituted 4,4' -Biisoxazoles

M. Laćan ; Faculty of Technology, University of Zagreb, 41000 Zagreb, Croatia, Yugoslavia
N. Filipović-Marinić ; Faculty of Technology, University of Zagreb, 41000 Zagreb, Croatia, Yugoslavia
D. Stefanović ; Ruder Boskovic Institute, 41000 Zagreb, Croatia, Yugoslavia

Abstract

Tetrasubstituted 4,4'-biisoxazoles were synthesized as a mixture
of isomers by treatment of enolic tautomers of 3,4-diaroyl-2,5-hexanedione
with hydroxylamine hydrochloride. A single isomer,· 3,3'-
diphenyl-5,5'-dimethyl-4,4'-biisoxazole was isolated from the reaction
product mixture.
The structure of these compounds has been determined by
spectrometric measurements (ir, 1H NMR and mass spectra). Mass
spectra have been studied in detail. The determination of metastable
transitions and accurate masses of important fragment ions led to
the construction of fragmentation schemes.

Keywords

Hrčak ID:

196350

URI

https://hrcak.srce.hr/196350

Publication date:

20.7.1977.

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