Nuclear magnetic resonance spectroscopy
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Karlheinz Seifert; Hinrich Meyer; Sigrid HΓ€rtling; Siegfried Johne
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Article
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1989
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Elsevier Science
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French
β 472 KB
Due to the interest in the conformation 192 of the ergot alkaloids the 'H-NMR spectra of 1, 3 and the 13C-NMR spectra of 1, 2, Q, 5 were recorded and the conformations determined. The synthesis of 1, 2 and 3 was described -334 elsewhere. 1 H-NMR. The C-and D-ring protons were assigned by means of de