✦ LIBER ✦

Studies of 13C NMR spectra of 13C-enriched cycloartenol biosynthesized from [1-13C]-, [2-13C]-and [1,2-13C2]-acetate. Revised 13C NMR spectral assignments of cycloartenol and cycloartanol and 13C NMR spectral support for the generally accepted skeleton formation mechanism of cycloartenol

✍ Scribed by Wasuke Kamisak; Chie Honda; Kiyoko Suwa; Koichiro Isoi

Publisher: John Wiley and Sons
Year: 1987
Tongue: English
Weight: 409 KB
Volume: 25
Category: Article
ISSN: 0749-1581
DOI: 10.1002/mrc.1260250806

No coin nor oath required. For personal study only.

✦ Synopsis

Previously proposed I3C NMR spectral assignments of cycloartenol(9,19-cyclolanost-24-en-3j?-ol) (1) and cycloartanol(9,19-cyclolanostan-3/3-ol) (2) were re-examined by means of 13C-enrichment experiments and LIS measurement of "C chemical shifts. Revised signal assignments are proposed for C-

📜 SIMILAR VOLUMES

Application of biosynthetic 13C enrichme

Application of biosynthetic 13C enrichment using [1,2-13C2] acetate as precursor for 13C NMR spectral assignment of the isopropyl methyls of (24β)-ethylsterols

✍ Francesco Nicotra; Fiamma Ronchetti; Giovanni Russo; Lucio Toma; Bianca M. Ranzi 📂 Article 📅 1985 🏛 John Wiley and Sons 🌐 English ⚖ 212 KB

Revised Assignments of the 13C NMR Spect

Revised Assignments of the 13C NMR Spectra of Grossularine-1 and -2 Using 2D Heteronuclear 1H–13C Correlations

✍ Ali Loukaci; Michèle Guyot 📂 Article 📅 1996 🏛 John Wiley and Sons 🌐 English ⚖ 198 KB 👁 2 views

## One-bond and long-range two-dimensional 'H-I'C NMR experiments allow the unequivocal assignment of 13C and 'H spectra. On this basis, previous assignments of 13C signals of grossularine-1 and -2 have been revised.

Complete assignment of the 13C and 1H NM

Complete assignment of the 13C and 1H NMR spectra of thyrsiferyl acetate

✍ John W. Blunt; John D. McCombs; Murray H. G. Munro; Frank N. Thomas 📂 Article 📅 1989 🏛 John Wiley and Sons 🌐 English ⚖ 334 KB 👁 1 views

Hydrogen-bonded 2-hydroxybenzalazines: C

Hydrogen-bonded 2-hydroxybenzalazines: Complete assignment of 1H and 13C NMR spectra

✍ Enrique Meléndez; José Luis Serrano; Francisco Sánchez-Ferrando 📂 Article 📅 1985 🏛 John Wiley and Sons 🌐 English ⚖ 218 KB

A 1H and 13C NMR study of methoxyretinoi

A 1H and 13C NMR study of methoxyretinoids. Spectral assignment and determination of configuration

✍ Ludger Ernst; Henning Hopf; Konstantin Natsias 📂 Article 📅 1984 🏛 John Wiley and Sons 🌐 English ⚖ 487 KB

A number of modified retinals and retinoic esters carrying one or two methoxy groups or one methoxy and one methyl group on the polyene chain were investigated by 'H and " C NMR spectroscopy. Spectral assignments were made from homo-and selective =C{'H} hetero-decoupling experiments and from chemica

17O, 13C and 1H NMR spectra of 1,2-dialk

17O, 13C and 1H NMR spectra of 1,2-dialkoxyethenes

✍ Esko Taskinen 📂 Article 📅 1998 🏛 John Wiley and Sons 🌐 English ⚖ 219 KB 👁 1 views

The 17O, 13C and 1H NMR spectra of a number of 1,2-dialkoxyethenes R1OCHxCHOR2 were recorded. The O atoms, in particular those of the E forms, are strongly shielded relative to the 17O nuclei of the corresponding alkyl vinyl ethers Moreover, in compounds of the type ROCHxCHOMe, the di †er-ROCHxCH 2