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Mass spectral study of substituted methyl (E)-and (Z)-cinnamates under 1,2-dibromoethane chemical ionization

โœ Scribed by M. Vairamani; M. Saraswathi; G. K. Viswanadha Rao

Publisher
John Wiley and Sons
Year
1991
Tongue
English
Weight
265 KB
Volume
26
Category
Article
ISSN
1076-5174

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โœฆ Synopsis

Dibromoethane chemical ionization mass spectra of ten pairs of methyl (aand (a-cinnamates were studied.

C,H4Br+ ion forms stable adducts with E-isomers and the adducts of Z-isomers show preferential loss of methanol. The observed results suggest that the probability of ring alkylation is greater than with the carbonyl group.

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## Abstract The spectra of five pharmacologically interesting substituted pyrazolo[1,2โ€__a__][1,2,4]triazole hydroiodides were measured under electron and chemical ionization. In the electron ionization spectra, in addition to the intense molecular ion peak of the free base (M^+^\*), there was also