In:
European Journal of Organic Chemistry, Wiley, Vol. 2011, No. 10 ( 2011-04), p. 1891-1895
Abstract:
Oxidation of 2‐ tert ‐butyl‐3‐( tert ‐butylamino)‐2 H ‐indazoles with lead(IV) oxide yields red, stable radicals, which can be distilled under high vacuum and recrystallized. They revert to their precursors on Pd‐catalysed hydrogenation. Configuration and atomic distances were obtained by X‐ray diffraction analysis. EPR hfc constants were assigned with the help of 15 N labeling and exchange of a phenyl hydrogen atom for a tert ‐butyl group. The X‐ray and EPR results show that the novel radicals are to be considered as cyclic hydrazyl radicals, modified by delocalization of the unpaired electron involving the exocyclic imino group and the benzene ring.
Type of Medium:
Online Resource
ISSN:
1434-193X
,
1099-0690
DOI:
10.1002/ejoc.v2011.10
DOI:
10.1002/ejoc.201001659
Language:
English
Publisher:
Wiley
Publication Date:
2011
detail.hit.zdb_id:
1410000-9
detail.hit.zdb_id:
1475010-7
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