Electron impact mass spectra of 1a,3-disubstituted 1,1-dichloro-1,1a,2,3-tetrahydroazirino [2,1-d][1,5]benzothiazepines

Autor:	Ruoxi Lan, Jiaxi Xu, Sheng Jin
Rok vydání:	1999
Předmět:	Thiazepines Aziridines Organic Chemistry chemistry.chemical_element Propyne Ring (chemistry) Photochemistry Mass spectrometry Mass Spectrometry Analytical Chemistry Ion chemistry.chemical_compound chemistry Phenylacetylene Mass spectrum Chlorine Spectroscopy Electron ionization
Zdroj:	Rapid Communications in Mass Spectrometry. 13:1506-1510
ISSN:	1097-0231 0951-4198
DOI:	10.1002/(sici)1097-0231(19990730)13:14<1506::aid-rcm676>3.0.co;2-v
Popis:	The mass spectrometric behaviour of eight 1a,3-disubstituted 1, 1-dichloro-1,1a,2,3-tetrahydroazirino[2,1-d][1,5]benzothiazepines has been studied with the aid of mass-analyzed ion kinetic energy spectrometry and exact mass measurements under electron impact ionization. All compounds show a tendency to eliminate a chlorine radical from the aziridine ring and then eliminate a neutral propene or substituted/unsubstituted styrene from the thiazepine ring to yield 1,4-benzothiazine ions. They can also lose hydrogen chloride and a chlorine radical, or lose two chlorine atoms, to undergo a ring enlargement rearrangement to produce 1,6-benzothiazocine ions, which can further eliminate propyne or phenylacetylene, or small molecular fragments, to yield some abundant fragment ions.
Databáze:	OpenAIRE
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