Strained heterocyclic systems. VIII. The mass spectral fragmentations of some arylquinolines and quinoline N‐oxides

Abstract

High resolution mass spectra of compounds 1—8 were investigated. For the quinolines (1–3) the absence of major peaks other than M+ and (M‐1)+ reflects the stability of those systems. The N‐oxides (4–6) all exhibit major peaks at M+, (M‐16)+, and (M‐17)+. In addition, 4 shows prominent fragmentations reflecting loss of hydrogen and carbon monoxide. The pathways are related to the geometries of the N‐oxides; deuterated compounds (7–8) aided these assignments.