✦ LIBER ✦

Mass spectral fragmentation patterns of new 5-acetyl-4-aryl-6-methyl-2(1H)pyridones

✍ Scribed by Roberto Martinez; Margarita Suarez; Nazario Martin; Estael Ochoa; Carlos Seoane; Yamila Verdecia

Publisher: John Wiley and Sons
Year: 1999
Tongue: English
Weight: 36 KB
Volume: 13
Category: Article
ISSN: 0951-4198
DOI: 10.1002/(sici)1097-0231(19991115)13:21<2180::aid-rcm772>3.0.co;2-s

No coin nor oath required. For personal study only.

✦ Synopsis

The electron impact mass spectra of new 5-acetyl-4-aryl-6-methyl-2(1H)pyridones have been studied. A dominant peak in all the spectra is due to cleavage of the CO-NH bond of the amido group with charge retention on the carbonyl group. This fragmentation is followed by a hydrogen rearrangement to the nitrogen atom forming ketene intermediates; this pathway leads to a highly stabilized ion which constitutes the base peak in the spectra in most of the compounds studied.

📜 SIMILAR VOLUMES

Mass spectral fragmentation patterns of

Mass spectral fragmentation patterns of 1a,3-diaryl-1,1,4,4-tetrachloro-1a,2,3,4-tetrahydro-1H-azirino[2,1-e][1,6]benzothiazocines

✍ Jiaxi Xu; Ruoxi Lan; Sheng Jin 📂 Article 📅 1999 🏛 John Wiley and Sons 🌐 English ⚖ 64 KB 👁 1 views

The mass spectrometric behaviour of three 1a,3-diaryl-1,1,4,4-tetrachloro-1a,2,3,4-tetrahydro-1H-azirino [2,1-e][1,6]benzothiazocines has been studied with the aid of mass-analyzed ion kinetic energy spectrometry and exact mass measurements under electron impact ionization. All compounds show a tend

Electron impact mass spectral fragmentat

Electron impact mass spectral fragmentation patterns of 2a,4-disubstituted 5-benzoyl-2-chloro-2a,3,4,5-tetrahydroazeto[1,2-a][1,5]- benzodiazepin-1(2H)-ones

✍ Jiaxi Xu; Gang Zuo; Peng Jiao; Hongzhong Wang; Sheng Jin; Albert S. C. Chan 📂 Article 📅 2000 🏛 John Wiley and Sons 🌐 English ⚖ 48 KB 👁 2 views

The mass spectrometric behaviour of six 2a,4-disubstituted 5-benzoyl-2-chloro-2a,3,4,5-tetrahydroazeto[1,2-a][1,5]benzodiazepin-1(2H)-ones has been studied with the aid of mass-analysed ion kinetic energy spectrometry and accurate mass measurements under electron impact ionization. All compounds sho

Condensation Products of 1-Aryl-3-ethoxy

Condensation Products of 1-Aryl-3-ethoxycarbonyl-2-methyl-1,4,5,6-tetrahydro-4(1H)pyridones with Hydrazine, Phenylhydrazine, and Hydroxylamine.

✍ R. Vaickelioniene; V. Mickevicius; G. Mikulskiene 📂 Article 📅 2005 🏛 John Wiley and Sons ⚖ 24 KB

ChemInform Abstract: Synthesis of Some N

ChemInform Abstract: Synthesis of Some New N-[4-Acetyl-4,5-dihydro-5- (1-aryl-5-methyl-1H-1,2,3-triazol-4-yl)-5-methyl-1,3,4-thiadiazol-2-yl] acetamide Derivatives

✍ Hui-Cheng Wang; Rong-Shan Li; Hong-Ru Dong; Heng-Shan Dong 📂 Article 📅 2010 🏛 John Wiley and Sons ⚖ 21 KB

## Abstract via condensation of thiosemicarbazides (V) with Ac~2~O (10 examples)

Electron-impact mass spectral study of 2

Electron-impact mass spectral study of 2-allyloxy-6-phenyl-4-trifluoromethyl pyridines and N-allyl-6-phenyl-4-trifluoromethyl-2(1H)-pyridones

✍ S. Vivekananda; A. Chandra Sheker Reddy; B. Narsaiah; R. V. Venkataratnam; R. Sr 📂 Article 📅 1998 🏛 John Wiley and Sons 🌐 English ⚖ 240 KB 👁 2 views

The mass spectrometric behaviour of some new 2-allyloxy-6-phenyl-4-trifluoromethyl pyridines and Nallyl-6-phenyl-4-trifluoromethyl-2(1H)-pyridones have been studied with the aid of metastable ion, collision induced dissociation and high resolution techniques. The major fragmentations observed in the

Iodine(III) Mediated Synthesis of New 5-

Iodine(III) Mediated Synthesis of New 5-Aryl-3-(4-hydroxy-6-methyl-2H-pyran-2-oxo-3-yl)-1-phenylpyrazoles from Dehydrogenation of 5-Aryl-3-(4-hydroxy-6-methyl-2H-pyran-2-oxo-3-yl)-1-phenylpyrazolines.

✍ Om Prakash; Ajay Kumar; Mayank Kinger; Shiv P. Singh 📂 Article 📅 2006 🏛 John Wiley and Sons ⚖ 18 KB