Nuclear magnetic resonance spectral analysis of three isomeric 2,3,5-trisubstituted N-methylpiperidines
✍ Scribed by Heleni K. Kotzamani; Ioannis K. Stamos
- Publisher
- John Wiley and Sons
- Year
- 1994
- Tongue
- English
- Weight
- 389 KB
- Volume
- 32
- Category
- Article
- ISSN
- 0749-1581
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✦ Synopsis
Abstract
The ^1^H and ^13^C NMR spectra of three stereoisomeric 2‐(p‐chlorophenylthiomethyl)‐3‐(3‐methoxyphenyl)‐5‐carbomethoxy‐N‐methylpiperidines were analysed in terms of configuration and solute conformation. These studies together with 2D J‐resolved, 2D‐COSY and 2D ^1^H^13^C‐correlated spectra demonstrate the existence of 2a‐3a‐5e, 2e‐3a‐5e and 2e‐3e‐5e chair conformations
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## Abstract The conformational analysis of biologically active lofendazam (7‐chloro‐5‐phenyl‐1,3,4,5‐tetrahydro‐__2H__‐1,5‐benzodiazepin‐2‐one) is carried out by means of lanthanide shift reagent assisted ^1^H NMR spectroscopy: the lanthanide induced shift computer simulation suggests that in deute