𝔖 Bobbio Scriptorium
✦   LIBER   ✦

13C NMR spectra of natural products. 1—guaianolides

✍ Scribed by Antonio J. R. Da Silva; Marcos Garcia; Paul M. Baker; Jaime A. Rabi

Publisher
John Wiley and Sons
Year
1981
Tongue
English
Weight
403 KB
Volume
16
Category
Article
ISSN
0749-1581

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

The ^13^C NMR spectra of 18 guaianolides have been measured and the chemical shifts assigned. The compounds investigated include the naturally occurring eremanthin (1), dehydrocostus lactone, eregoyazin, eregoyazidin and other semisynthetic lactones derived from 1. Qualitative analysis of the data suggests that the predominant conformation in almost all compounds so far studied is a distorted chair‐like form.

📜 SIMILAR VOLUMES

13C NMR spectra of natural products. 2—e
13C NMR spectra of natural products. 2—eudesmanolides
✍ Antonio J. R. da Silva; Marcos Garcia; Paul M. Baker; Jaime A. Rabi 📂 Article 📅 1981 🏛 John Wiley and Sons 🌐 English ⚖ 138 KB

## Abstract The ^13^C NMR spectra of eight eudesmanolides have been measured and the chemical shifts assigned. Among the compounds studied are the naturally occurring α‐cyclocostunolide, santamarin, arbsculin A and reynosin.

13C-NMR. Spectra of Natural and Semi-syn
13C-NMR. Spectra of Natural and Semi-synthetic Cannabinoids
✍ Michael Binder; Ingo Franke; Burkhard Schmidt; Wolfgang Dietrich 📂 Article 📅 1982 🏛 John Wiley and Sons 🌐 German ⚖ 269 KB

## Abstract The ^13^C‐NMR. spectra of one natural and ten semi‐synthetic cannabinoids were analyzed in detail. Assignments of the signals are based on their chemical shifts, splitting patterns in ^1^H‐off‐resonance decoupling experiments and comparison with ^13^C‐NMR. data of related cannabinoids.

13C-NMR Spectra of Benzocycloalkenes
13C-NMR Spectra of Benzocycloalkenes
✍ Prof. Dr. Harald Günther; Dipl.-Chem. Günther Jikeli; Dipl.-Chem. Hans Schmickle 📂 Article 📅 1973 🏛 John Wiley and Sons 🌐 English ⚖ 221 KB 👁 2 views
13C-NMR Spectra of Diazoalkanes
13C-NMR Spectra of Diazoalkanes
✍ Univ.-Doz. Dr. Joachim Firl; Dr. Wolfgang Runge; Dipl.-Chem. Werner Hartmann 📂 Article 📅 1974 🏛 John Wiley and Sons 🌐 English ⚖ 224 KB 👁 2 views
13C-NMR. Spectra of Pteridines
13C-NMR. Spectra of Pteridines
✍ Georges Müller; Wolfgang Von Philipsborn 📂 Article 📅 1973 🏛 John Wiley and Sons 🌐 German ⚖ 428 KB

## Abstract ^13^C‐NMR. spectra of pterin, xanthopterin, isoxanthopterin, leucopterin, lumazine and of the model compounds isocytosine and desamino‐isocytosine have been measured as anions and cations in 1 M NaOD, CF~3~COOH, H~2~SO~4~ and FSO~3~H solutions. The spectra were analysed by means of hete