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

✍ Scribed by S. Vivekananda; A. Chandra Sheker Reddy; B. Narsaiah; R. V. Venkataratnam; R. Srinivas

• Publisher: John Wiley and Sons
• Year: 1998
• Tongue: English
• Weight: 240 KB
• Volume: 12
• Category: Article
• ISSN: 0951-4198
• DOI: 10.1002/(sici)1097-0231(19980529)12:10<651::aid-rcm209>3.0.co;2-n

✦ Synopsis

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 O-allyl and N-allyl compounds involve the losses of H Á , CH 3 Á , CHO Á and C 6 H 5 Á from the molecular ion. The O-allyl and N-allyl compounds can be readily distinguished by the marked differences in the abundances of various diagnostic ions. A McLafferty rearrangement in both the compounds leads to an ion of m/z 239, for which a 4-trifluoromethyl-6-phenyl-2-pyridone (4) structure has been proposed. This has been further supported by a CID study using the reference compound 4.