Careful analysis of the 1H and 13C NMR spectra of a series of isochromanylacetylarylhydrazone derivatives indicated the diastereomeric selective character in the synthetic step used to obtain the derivatives employing acidic conditions during the condensation of the corresponding acylhydrazides with
1H and 13C NMR Spectroscopy analysis of acetonides of D-Glucitol Derivatives
โ Scribed by Lucilia Kato; Raquel Marques Braga
- Publisher
- John Wiley and Sons
- Year
- 1999
- Tongue
- English
- Weight
- 52 KB
- Volume
- 37
- Category
- Article
- ISSN
- 0749-1581
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โฆ Synopsis
A series of acetonides was obtained during the formal synthesis of deoxynojirimycin. The 1 H NMR spectra of these derivatives contain strongly coupled multiplets covering a chemical shift range of about 1 ppm. The spectra are severely complicated by second-order effects and were assigned by 2D NMR and 13 C NMR experiments.
๐ SIMILAR VOLUMES
1H and 13C NMR spectral data for 12 N-[(benzo-or heterocycloalkyl)methyl or ethyl]-4-(p-รuorobenzoyl)piperidines were fully assigned by a combination of one-(1H, 13C, DEPT) and twodimensional (HMQC) NMR experiments.
1-Aryl-4-carboxy-5-methyl-1,2,3-triazoles were prepared by the condensation of aryl azides with ethyl acetoacetate. The structures of these compounds were characterized by MS, IR and 1H and 13C NMR spectroscopy. The measured and calculated 13C chemical shifts of the aromatic carbons were compared.