NMR study of 4-hydroxy-1-methylpiperidine betaine derivatives
✍ Scribed by Z. Dega-Szafran; E. Dulewicz; M. Szafran
- Publisher
- Elsevier Science
- Year
- 2006
- Tongue
- English
- Weight
- 196 KB
- Volume
- 792-793
- Category
- Article
- ISSN
- 0022-2860
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📜 SIMILAR VOLUMES
The molecular geometries, harmonic frequencies and intensities of the vibrational bands of a and b polymorphs of 4-hydroxy-1-methylpiperidine betaine hydrochloride (a-HO-MPBHÁCl, b-HO-MPBHÁCl) and their deuterated derivatives have been calculated with the B3LYP/6-31G(d,p) level of theory. The calcul
## Abstract The chemical‐shift anisochrony Δδ of the fluorine signal for the enantiomerically enriched (3__S__,4__R__)‐4‐(4‐fluorophenyl)‐3‐hydroxymethyl‐1‐methylpiperidine (1a) was induced in the presence of __S__‐Mosher acid (2) and its magnitude varied with the enantiomeric purity of 1a. Very lo