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Mass spectrometric studies of tetrasubstituted 3a,4,5,11-tetrahydro-3H-1,2,4-triazolo[4,3-d][1,5]benzothiazepines

✍ Scribed by Jiaxi Xu; Meiyu He; Sheng Jin

Publisher: John Wiley and Sons
Year: 1998
Tongue: English
Weight: 53 KB
Volume: 12
Category: Article
ISSN: 0951-4198
DOI: 10.1002/(sici)1097-0231(19980831)12:16<1115::aid-rcm278>3.0.co;2-e

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✦ Synopsis

The mass spectrometric behaviour of seven tetrasubstituted 3a ,4,5,2,3d][1,5]benzothiazepines has been studied with the aid of mass-analysed ion kinetic energy spectrometry and exact mass measurements under electron impact ionization. All compounds show a tendency to eliminate a neutral substituted or unsubstituted styrene molecule from the thiazepine ring to yield 1,2,4-triazolo[4,3b][1,3]benzothiazole ions, and further undergo reverse 1,3-dipolar cycloadditions to give benzothiazole ions. The formation of stable conjugated fused tetracyclic systems, substituted 1,2,4-triazolo[4,3-f]phenanthridine ions, under electron impact ionization, has also been found.

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