Fragmentation pathways of the title compounds were studied using accurate mass measurements and collision-induced dissociation spectra. Substituents in the ortho position of the aryl group at the pyrimidine ring were found to play a special role in the electron impact (EI) induced fragmentation of t
Mass spectra of substituted 4,6-bis-aryl-2-pyrimidoles
β Scribed by L. Yu. Ivanovskaya; M. I. Gorfinkel; V. F. Sedova; Z. D. Dubovenko
- Publisher
- John Wiley and Sons
- Year
- 1973
- Tongue
- English
- Weight
- 423 KB
- Volume
- 7
- Category
- Article
- ISSN
- 1076-5174
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β¦ Synopsis
Abstract
An analysis of the mass spectra of 18 4,6βbisβarylβ2βpyrimidoles was performed. Regularities allowing structure determination, in particular for isomers, are discussed.
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The mass spectra of several 4,5-disubstituted-2-oxazolidones and several related N-methyl derivatives have been determined. Fragmentation has been found to be a function of three factors: (1) the size of the alkyl function at C-5, (2) the location of the aryl substituent, and (3) replacement of N-H
The electron impact (EI) mass spectra of sixteen l-aryl-2,2dibromocyclopropanes give an ion at m/z 115, the structure of which is proposed to be the indenium ion based on a collision-activated decomposition experiment.