Thienoquinolines: X—The fragmentation of thieno(2,3-b)quinoline and its derivatives under electron impact

✍ Scribed by N. Soundararajan; R. Palaniappan; V. T. Ramakrishnan; T. K. Thiruvengadam; K. Kanakarajan; K. Natarajan; P. Shanmugam

• Publisher: John Wiley and Sons
• Year: 1980
• Tongue: English
• Weight: 511 KB
• Volume: 15
• Category: Article
• ISSN: 1076-5174
• DOI: 10.1002/oms.1210151211

✦ Synopsis

Abstract

A study has been made of the fragmentation upon electron impact of thieno(2,3‐b)quinoline and sixteen of its derivatives containing methoxy, methylenedioxy, chloro, bromo, iodo, nitro and methyl substituents. Besides these, the fragmentation patterns of some S‐oxides, and S,S‐dioxides were also investigated. The majority of the spectra contain molecular ions and the principal fragmentation routes involve loss of carbon monosulphide and hydrogen cyanide from the molecular ion. Rearrangement of the molecular ion appears to precede the fragmentation process in the case of S,S‐dioxides. The fragmentation of 4‐methylthieno(2,3‐b)quinoline is closely analogous to that of alkylquinolines. The main features of these spectra can be predicted from the fragmentation pathways proposed for the parent thieno(2,3‐b)quinoline.