Unusual carbonyl carbon chemical shifts
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Peter Yates; Hillar Auksi; J. A. Gosbee; G. E. Langford; F. N. Maclachlan
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Article
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1980
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John Wiley and Sons
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English
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## Abstract The Ketonic ^13^C NMR signals of a series of 6โhydroxyโ5โoxobicyclo[2.2.2]octโ7โeneโ2โcarboxylic acid lactones and of haplophytine and related __N__โsubstituted 3โpiperidinones occur at exceptionally high field; the structural factors which are responsible have been elucidated by compar