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Structure and Stereochemistry of Pyrazolines, Precursors to gem-Dimethylcyclopropane

✍ Scribed by Marie-Thérèse Martin; Rafik Gharbi; Abdelkader Khemiss; Zine Mighri

Publisher
John Wiley and Sons
Year
1997
Tongue
English
Weight
289 KB
Volume
35
Category
Article
ISSN
0749-1581

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✦ Synopsis

A complete and unambiguous assignment of the 1H and 13C NMR spectra of 5,5

2,5,5,9-tetramethyl-3,4-diazatricyclo [ 6.3.1.02,6 ]dodeca-3,9-diene-7,11-dione and 2, 5,5,12,12,9-hexamethyl-3,4,10,11-tetraazatetracyclo [ 1.3.6.6.02,6.09,13 ] undeca-3,11-diene-7,14-dione was accomplished by inverse two-dimensional chemical shift correlation methods and their conformations were determined by NOESY experiments.

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## Abstract The relative configuration and conformation of the 8‐methyl‐5‐nitro‐1‐oxo‐Δ^8(8a)^‐octahydronaphthalene isomers were elucidated by various ^1^H and ^13^C NMR methods. The structure of the tricyclic by‐products was also determined.