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13C and 1H NMR assignments for a series of dehydroabietic acid derivatives

✍ Scribed by Bárbara Gigante; Lina Santos; Maria João Marcelo-Curto; José Ascenso

Publisher: John Wiley and Sons
Year: 1995
Tongue: English
Weight: 339 KB
Volume: 33
Category: Article
ISSN: 0749-1581
DOI: 10.1002/mrc.1260330416

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✦ Synopsis

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assignments were made for a series of nitro and amine C ring-substituted dehydroabietic acid derivative, the main resin acid present in disproportionated rosin and an important intermediate in the chemical industry. A combination of 1D and 2D NMR techniques, including HETCORR, COSY and DEPT experiments, was used. Quaternary carbon atoms, mainly aromatic substituted, require care owing to assignment difticulties that are based on calculated data and are confirmed by long-range 'H, "C NMR correlation with selective INEPT and the proton-detected HMBC experiment.

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