Concepedia

<sup>13</sup>C‐NMR. Spectroscopy of Naturally Occurring Substances. XLV. Iboga Alkaloids

Ernest Wenkert, David W. Cochran, Hugo E. Gottlieb, Edward W. Hagaman, Raimundo Braz‐Filho, Francisco José de Abreu Matos, Maria Iracema Lacerda Machado Madruga

Helvetica Chimica Acta · 1976 · 48 citations · 9 references

DOI

Concepts

Abstract

Abstract The carbon shifts of the Iboga‐type alkaloids catharanthine, voacangine, coronaridine, ibogaine, dihydrocatharanthine and epiibogamine were recorded and correlated with the conformation of the natural bases. A 13 C‐NMR. analysis of heyneanine determined its C(19) configuration and a similar study of epiheyneanine proved its structure.

References

9

Topics in carbon-13 NMR spectroscopy

W.S.B · Journal of Magnetic Resonance (1969) · 1975 · 343 citations

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Nuclear magnetic resonance spectroscopy. Carbon-13 chemical shifts in acyclic and alicyclic alcohols

John D. Roberts, Frank J. Weigert, Jacqueline I. Kroschwitz et al. · Journal of the American Chemical Society · 1970 · 318 citations

Carbon-13 magnetic resonance. Upfield shifts caused by nitrogen, oxygen, and fluorine atoms located at the .gamma. position and antiperiplanar to the nucleus observed

Ernest L. Eliel, William F. Bailey, Laurence D. Kopp et al. · Journal of the American Chemical Society · 1975 · 212 citations

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General methods of synthesis of indole alkaloids. 14. Short routes of construction of yohimboid and ajmalicinoid alkaloid systems and their carbon-13 nuclear magnetic resonance spectral analysis

Ernest Wenkert, Ching‐Jer Chang, H. P. S. CHAWLA et al. · Journal of the American Chemical Society · 1976 · 203 citations

, , +12

Carbon-13 nuclear magnetic resonance spectroscopy of naturally occurring substances. XIX. Aspidosperma alkaloids

Ernest Wenkert, David W. Cochran, Edward W. Hagaman et al. · Journal of the American Chemical Society · 1973 · 134 citations

, , +14