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The electron impact‐induced cyclization of o ‐carboxy‐ and o ‐carboxamidocyclopropylbenzenes
Author(s) -
Lebedev Albert T.,
Alekseeva Tatya.,
Kutateladze Tatyana G.,
Mochalov Sergey S.,
Shabarov Yury S.,
Petrosyan Valery S.
Publication year - 1989
Publication title -
organic mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.475
H-Index - 121
eISSN - 1096-9888
pISSN - 0030-493X
DOI - 10.1002/oms.1210240302
Subject(s) - cyclopropane , isomerization , electron ionization , mass spectrum , ion , metastability , chemistry , mass spectrometry , spectral line , resolution (logic) , electron , analytical chemistry (journal) , medicinal chemistry , high resolution , organic chemistry , physics , chromatography , catalysis , ionization , nuclear physics , ring (chemistry) , remote sensing , astronomy , artificial intelligence , computer science , geology
The isomerization of M + ˙ of o ‐carboxy‐ and o ‐carboxamidocyclopropylbenzenes into five‐ and six‐membered heterocycles due to the ortho effect has been demonstrated by means of electron impact mass spectra, high‐resolution mass spectrometry data and metastable ion spectra. The criteria for the quantitative estimation of the degree of cyclopropane cyclization into these isomeric cycles were formulated. The nature and quantity of heterocyclic ions proved to be in good accord with the results for cyclization of the same cyclopropanes in the strong acid solutions.