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Chemical shift non-equivalence of ring protons in N-substituted β-lactams

✍ Scribed by A. Vigevani; B. Gioia; G. G. Gallo

Publisher
John Wiley and Sons
Year
1970
Tongue
English
Weight
216 KB
Volume
2
Category
Article
ISSN
0749-1581

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✦ Synopsis

Abstract

A study is reported on the chemical shift non‐equivalence of the diastereotopic protons at C‐4 in identically 3,3‐disubstituted β‐lactams having an asymmetric carbon atom in positions ranging from β to ε of the chain attached to the nitrogen atom. The non‐equivalence has been correlated with the nature of the substituents bonded to the chiral centre and to its distance from the C‐4 protons.

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