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Carbon-13 NMR spectra of 1,3-dioxolanes. I—new parameters for cis- and trans-4-methyl groups in 2,4-disubstituted derivatives

✍ Scribed by Antonio Espinosa; Miguel A. Gallo; Joaquín Campos; Antonio Entrena; Encarnación Camacho

Publisher
John Wiley and Sons
Year
1986
Tongue
English
Weight
465 KB
Volume
24
Category
Article
ISSN
0749-1581

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✦ Synopsis

The uC NMR spectra of 24 1,3-dioxoIane derivatives are reported in an attempt to propose parameters for the C-2, C-4 and C-5 shifts from the %Me and 4-Me substituents, based on the ring stereochemistry. These parameters are obtained from simultaneous equations, and clearly agree with those Calculated by the use of pattern molecules. The dcdated parameter for the C-4 shift due to a 2-Me group differs notably from that proposed by other workers.

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On the stereochemistry of 1,4-diheterocy
On the stereochemistry of 1,4-diheterocyclanes. IV—carbon-13 NMR spectra and structural properties of 1,4-dioxane-2,3-diols and their methyl-substituted derivatives
✍ Pertti Äyräs 📂 Article 📅 1978 🏛 John Wiley and Sons 🌐 English ⚖ 463 KB

## Abstract The 1,4‐dioxane‐2,3‐diols and a number of their methyl‐substituted derivatives were synthesized and their ^13^C NMR spectra measured. The configurational properties were studied on the basis of the spectral data and chemical equilibration. For the parent compound the __trans__ configura