## Abstract The reliable determination of stereocenters contained within chemical structures usually requires utilization of NMR data, chemical derivatization, molecular modeling, quantumβmechanical (QM) calculations and, if available, Xβray analysis. In this article, we show that the number of ste
A simple 13C NMR method for determination of the relative stereochemistry of 2,3-dialkylpentenoic acids and related compounds
β Scribed by Sang-phyo Hong; Matthias C McIntosh
- Book ID
- 108371199
- Publisher
- Elsevier Science
- Year
- 2001
- Tongue
- French
- Weight
- 187 KB
- Volume
- 57
- Category
- Article
- ISSN
- 0040-4020
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π SIMILAR VOLUMES
The anomeric configuration of sialic acid and its derivatives could be determined on the basis of the coupling pattern of C-l in the gated proton-decoupled or selective proton decoupled "C-NMR spectra; the a! anomer gave a doublet C-l signal while the fi gave a singlet. Recently much interest has b
## Abstract The copper/chiral phosphoramidite (**L~1~**)βcatalyzed conjugate addition of dimethylzinc to cyclooctaβ2,7βdienone **4**, followed by the methylation of the intermediate enolate, yielded a single isomer of 7,8βdimethylcyclooctβ2βenone (+)β**5**. Compound (+)β**5** was subjected to the s