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Nitrogen-15 NMR evidence for the structures of N-9-H-Xanthen-9-yl- and N,N′-Di-9 H-xanthen-9-yl-ureas

✍ Scribed by Bruce Coxon; Alexander J. Fatiadi; Alex Cohen; Harry S. Hertz; Robert Schaffer

Publisher
John Wiley and Sons
Year
1980
Tongue
English
Weight
590 KB
Volume
13
Category
Article
ISSN
0749-1581

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✦ Synopsis

Abstract

A new monoxanthen‒9‒yl derivative of urea has been synthesized and the structure of this product (N‒9 H‒xanthen‒9‒ylurea) and that of the previously known N,N′‒di‒9 H‒xanthen‒9‒ylurea have been proved by ^15^N NMR and other spectroscopic techniques. A series of ^13^C and ^15^N labeled urea derivatives has been prepared and the utility of their ^13^C and ^15^N chemical shifts and coupling constants in the structural analysis of urea derivatives has been investigated.

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