Premium
Carbon‐13 NMR study of 5‐triphenyl‐phosphoranilydeneaminopyrazoles
Author(s) -
Arques Antonio,
Molina Pedro,
Vinader María Victoria,
Elguero José
Publication year - 1991
Publication title -
magnetic resonance in chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0749-1581
DOI - 10.1002/mrc.1260290519
Subject(s) - chemistry , substituent , chemical shift , coupling constant , carbon 13 nmr , medicinal chemistry , stereochemistry , physics , particle physics
13 C chemical shifts and 13 C– 31 P coupling constants are reported for nineteen pyrazoles bearing an NPPh 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, CHCHCOMe, CH(CH 2 NO 2 ) 2 , CHNR, CH 2 NHR and CH 2 N(COR)Ar].
Accelerating Research
Robert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom
Address
John Eccles HouseRobert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom