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N-methylene chemical shifts of N-benzylpyridinium salts

✍ Scribed by S. Munavalli; F.-L. Hsu; L. L. Szafraniec; W. T. Beaudry; E. J. Poziomek

Book ID
102529909
Publisher
John Wiley and Sons
Year
1987
Tongue
English
Weight
254 KB
Volume
25
Category
Article
ISSN
0749-1581

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✦ Synopsis

The steroid samples (ca 5 mg) were each dissolved in CDCl, (40 1.1) containing Me$ as an internal reference and were recorded in 1.7 mm 0.d. micro-sample tubes. Chemical shifts were expressed in ppm relative to Me4% The I3C NMR spectra of each compound were obtained in both the proton noisedecoupled and SFORD modes.

All the C-6 methylated steroids examined were obtained from cholesterol (19), and their preparation and physical data have been reported elsewhere?

N-Methylene Chemical Shifts of N-Benzylpyridinium Salts

S. MUNAVALLI (to whom correspondence should be addressed), F.

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N-Methyl chemical shifts in some 2-, 3-
N-Methyl chemical shifts in some 2-, 3- and 4-substituted N-methylpyridinium salts
✍ L. W. Deady; G. D. Willett πŸ“‚ Article πŸ“… 1974 πŸ› John Wiley and Sons 🌐 English βš– 200 KB

## Abstract The chemical shifts of the __N__‐methyl group in a series of 2‐, 3‐ and 4‐substituted __N__‐methylpyridinium salts have been measured in DMSO solution. The shift is primarily affected by resonance interaction between the substituent and aza group, and the results suggest that the resona