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Radikalreaktionen an N-Heterocyclen, X. Radikalreaktionen cyclischer 1,2-Diacylhydrazine

✍ Scribed by Kluge, Ralph ;Schulz, Manfred ;Omelka, Ladislav ;Reinhardt, Michael

Publisher
Wiley (John Wiley & Sons)
Year
1992
Tongue
English
Weight
452 KB
Volume
125
Category
Article
ISSN
0009-2940

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✦ Synopsis

Oxidation / Hydrazyls / Hydrazine oxyls / ESR Free Radical Reactions of N-Heterocyclic Compounds, Xi']. -Radical Reactions of Cyclic 1.2-Diacylhydrazines Cyclic 1,Zdiacylhydrazyls 3 have been detected by ESR spectroscopy during oxidation of the corresponding NH compounds 2. The N coupling constants are determined and confirmed by simulation and by 15N labeling. The hydrazyls 3 react by dimerization to the corresponding tetrazanes of type 5 or by fl scission to the diacyl azo compounds 4 and C radicals. The fl scission of the radicals 3 is elucidated by UV/Vis detection of the azo compound 4b and reaction of 4 b to Diels-Alder adducts. The alkyl radicals are trapped by nitrosobenzene (8) (ESR).

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