2009
DOI: 10.2298/jsc0903223m
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ESI-MS spectra of 3-cyano-4-(substituted phenyl)-6-phenyl-2(1H)-pyridinones

Abstract: Twelve 3-cyano-4-(substituted phenyl)-6-phenyl-2(1H)-pyridinones were investigated by tandem mass spectrometry using positive as well as negative electrospray ionization. The influence of the electron affinity of the substituent and the steric effect on the fragmentation is discussed. Pyridinones with a substituent of low proton affinity show loss of water, HCN or benzene from the pyridinone ring in the first step of MS2 fragmentations. Oppositely, if a substituent with high proton affinity is present on the p… Show more

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Cited by 2 publications
(3 citation statements)
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“…5-Amino-1-phenylpyrazole (1) 27 , chalcone analogues 2a-f 28-32 , arylidenecyanoacetate ester 4a,b 33 , substituted benzylidenemalononitrile 6 33 and pyridone derivatives 8a-c [34][35][36] were prepared according to the literature. (7): A solution of 5-amino-1-phenylpyrazole (1) (0.0015 mol), the appropriate arylidenecyanoacetate ester 4a,b or substituted benzylidenemalononitrile 6 (0.0015 mol) and triethylamine (1 mL) in absolute ethanol (10 mL) was heated under reflux for 4 h. The reaction mixture was cooled and acidified to litmus paper with drops of conc.…”
Section: Methodsmentioning
confidence: 99%
See 1 more Smart Citation
“…5-Amino-1-phenylpyrazole (1) 27 , chalcone analogues 2a-f 28-32 , arylidenecyanoacetate ester 4a,b 33 , substituted benzylidenemalononitrile 6 33 and pyridone derivatives 8a-c [34][35][36] were prepared according to the literature. (7): A solution of 5-amino-1-phenylpyrazole (1) (0.0015 mol), the appropriate arylidenecyanoacetate ester 4a,b or substituted benzylidenemalononitrile 6 (0.0015 mol) and triethylamine (1 mL) in absolute ethanol (10 mL) was heated under reflux for 4 h. The reaction mixture was cooled and acidified to litmus paper with drops of conc.…”
Section: Methodsmentioning
confidence: 99%
“…5-Amino-1-phenylpyrazole (1) 27 , chalcone analogues 2a-f [28][29][30][31][32] , arylidenecyanoacetate ester 4a,b 33 , substituted benzylidenemalononitrile 6 33 and pyridone derivatives 8a-c [34][35][36] were prepared according to the literature.…”
Section: Methodsmentioning
confidence: 99%
“…236 Primer masenog spektra pozitivnih jona 3-cijano-4- . Kada se jon 'P' izbaci iz jonskog trapa, jon 'Q' nestaje iz odgovarajućeg spektra.…”
Section: Ispitivanja Fragmentacija 3-cijano-4-(supstituisani Fenil)-6unclassified