Electron impact induced mass spectral study of 2- and 4-ethoxycarbonylalkylthio-5-bromo-6-methyluracils

Abstract

Electron impact induced mass spectral fragmentation of ten new 2‐ and 4‐ethoxycarbonylalkylthio‐5‐bromo‐6‐methyluracils have been investigated. Fragmentation pathways are proposed on the basis of accurate mass and B/E and B2/E linked scan spectra measurements. The data obtained create the basis for the distinction of isomers. © 2000 John Wiley & Sons Ltd.

Electron impact induced mass spectral study of new metameric 2‐alkoxycarbonylalkylthio‐ and 1‐alkoxycarbonylalkyl‐2‐alkoxycarbonylalkylthio‐6‐aminouracils

“…It should be mentioned that loss of a sulfhydryl radical is common for aromatic thioethers. This type of fragmentation has not been observed previously for the molecular ions of 2‐alkoxycarbonylalkylthiouracils (and 6‐methyluracils),10 as well as 2‐ethoxycarbonylmethylmethylene and 2‐ethoxycarbonylethyl methylene‐5‐bromo‐6‐methyluracils 11…”