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Variable-temperature NMR studies of 6-(o-tolyl)-8-methoxy-1,8-dimethylbicyclo[2.2.2]oct-5-en-2-ones

โœ Scribed by A. Srikrishna; S. Danieldoss


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

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โœฆ Synopsis


Variable temperature NMR studies, establishing the presence of atropisomers, of b-(o-tolyl)-carvone (2) and the bicyclo [ 2.2.2 ] octene derivatives 4 and 5 mentioned in the title are described. 1997


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## Abstract The 1,3โ€dipolar addition reaction of acrylonitrile to the betaine 1โ€phenyl or methylโ€3โ€oxidopyridinium is not so highly regioselective as generally assumed. New regioisomers are isolated. Their structures are proven by mass spectroscopy and protonโ€and carbonโ€NMR spectroscopy. Some 3,4di