✦ LIBER ✦

Carbon-13 NMR spectroscopy of some pentacyclic triterpenoids

✍ Scribed by Amarendra Patra; Alok K. Mitra; Saroj Ghosh; Amitava Ghosh; A. K. Barua

Publisher: John Wiley and Sons
Year: 1981
Tongue: English
Weight: 182 KB
Volume: 15
Category: Article
ISSN: 0749-1581
DOI: 10.1002/mrc.1270150415

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

Carbon‐13 NMR signal assignment of a number of polyoxygenated triterpenes of the olean‐12‐ene and urs‐12‐ene series, carried out by considering the changes in chemical shift produced by the change of oxygenation pattern(s), and using methyl oleanolate as a model, are reported.

📜 SIMILAR VOLUMES

Carbon-13 NMR spectra of some tetra- and

Carbon-13 NMR spectra of some tetra- and pentacyclic triterpene methyl ethers

✍ J. W. Blunt; M. H. G. Munro 📂 Article 📅 1980 🏛 John Wiley and Sons 🌐 English ⚖ 194 KB 👁 1 views

## Abstract The carbon‐13 NMR spectra have been recorded for representatives of three previously unexamined classes of pentacyclic triterpenes—lupanes, fernanes and arboranes. In addition to the spectra of lupeol methyl ether, cylindrin and arundoin, the spectra of a number of other triterpene meth

Carbon-13 NMR spectra of some pentacycli

Carbon-13 NMR spectra of some pentacyclic triterpenoids with the olean-12-ene and 18α-olean-12-ene skeleton

✍ Giuliana Severini Ricca; Bruno Danieli; Giovanni Palmisano; Helmut Duddeck; M. H 📂 Article 📅 1978 🏛 John Wiley and Sons 🌐 English ⚖ 339 KB

The 13C NMR spectra of some pentacyclic triterpenoids, 3~-acetoxy-ll-oxo-olean-12-ene-30-oic acid methyl ester, 3~-acetoxy-ll-oxo-olean-12-ene-29-oic acid methyl ester, the corresponding 11-desoxo methyl esters, 3~-acetoxy-ll-oxo-18cw-olean-l2-en-30-oic acid methyl ester and 3~-acetoxy-ll-oxo-18~-ol

Carbon-13 NMR spectroscopy of some Stryc

Carbon-13 NMR spectroscopy of some Strychnos alkaloids. Part 2

✍ R. Verpoorte; T. A. van Beek; R. L. M. Riegman; P. J. Hylands; N. G. Bisset 📂 Article 📅 1984 🏛 John Wiley and Sons 🌐 English ⚖ 348 KB

London SW3 6LX, UK CNMR data for a series of natural and semi-synthetic ar-hydroxy-and -metho--substituted Strychnos alkaloids are presented and are used to determine substituent-induced chemical shift (SCS) values for the various substitution patterns. 13 R1 H R3 20 alkaloids have been examined. Th

Carbon-13 NMR spectroscopy of biological

Carbon-13 NMR spectroscopy of biological systems

✍ Glickson, Jerry D. ;Opella, Stanley J. 📂 Article 📅 1998 🏛 John Wiley and Sons 🌐 English ⚖ 75 KB

This book provides both an introduction for the novice and a review for the expert to the rapidly developing field of 13 C NMR spectroscopy of biological systems. It consists of a forward by Joachim Seelig, a preface by the author, and six chapters dealing with basic principles and key applications.

Carbon-13 NMR spectroscopy of kawa-pyron

Carbon-13 NMR spectroscopy of kawa-pyrones

✍ A. Banerji; A. K. Siddhanta; A. K. Acharyya; C. P. Dutta 📂 Article 📅 1980 🏛 John Wiley and Sons 🌐 English ⚖ 318 KB

## Abstract ^13^C NMR spectra of six kawa‐pyrones (styryl α‐pyrones) have been assigned. The assignments are based on the splitting pattern in the coupled spectra, comparison of the chemical shifts with those of model compounds and by application of additivity relationships. The ^13^C NMR of styren

Carbon-13 NMR spectra of some pseudoguai

Carbon-13 NMR spectra of some pseudoguaianolides

✍ Guillermo Delgado; Laura Alvarez; Eduardo Huerta; Alfonso Romo de Vivar; Rachel 📂 Article 📅 1987 🏛 John Wiley and Sons 🌐 English ⚖ 172 KB