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Carbon-13 NMR study of 5-triphenyl-phosphoranilydeneaminopyrazoles

✍ Scribed by Antonio Arques; Pedro Molina; María Victoria Vinader; José Elguero

Publisher
John Wiley and Sons
Year
1991
Tongue
English
Weight
258 KB
Volume
29
Category
Article
ISSN
0749-1581

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✦ Synopsis

Abstract

^13^C chemical shifts and ^13^C–^31^P coupling constants are reported for nineteen pyrazoles bearing an NPPh~3~ substituent at position 5. The three heterocyclic carbons are coupled with the phosphorus (^2^J, ^3^J and ^4^J). These couplings are very sensitive to the nature of the subtituent at position 4 [CHO, CHCHCOMe, CH(CH~2~NO~2~)~2~, CHNR, CH~2~NHR and CH~2~N(COR)Ar].

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