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Preferred conformations of 9-oxo-8,9,10,11-tetrahydro- and 9-hydroxy-10,11-dihydro-7h-cycloocta[de]naphthalene-8,10-dicarboxylic esters: unusually stable tautomers of β-ketoesters

✍ Scribed by Toshihiro Kamada; Osamu Yamamoto

Publisher
Elsevier Science
Year
1977
Tongue
French
Weight
245 KB
Volume
18
Category
Article
ISSN
0040-4039

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✦ Synopsis

It is well known that S-ketoesters assume both ketonic and enolic structures by tautomerization and such keto-enol equilibria have hitherto been observed in a number of cyclic and acyclic enolizable 8-ketoesters. 1 However, most compounds reported so far exist only as an equilibrium mixture of the keto and enol form, 1

or assume only either form of the two isomers. 2,3 As yet, such a case is not

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