title: Electron impact mass spectral studies of 2a,4-disubstituted 2-phthalimido-2,2a,3,4-tetrahydro-1H-azeto[2,1-d][1, 5]benzothiazepin-1-ones.
abstract: The mass spectrometric behaviour of seven 2a,4-disubstituted 2-phthalimido-2,2a,3,4-tetrahydro-1H-azeto[2,1-d][1, 5]benzothiazepin-1-ones has been studied with the aid of mass-analyzed ion kinetic energy spectrometry and accurate mass measurements under electron impact ionization. All compounds show a tendency to eliminate a CO molecule, a phthalimido (PhthN) radical, or a phthalimide (PhthNH) molecule. All of the resulting fragment ions could further lose a propene or (substituted) styrene molecule. The molecular ions could also undergo a reverse [2 + 2] cycloaddition reaction.
authors: College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China.
authors: J
authors: J
authors: Xu
authors: G
authors: G
authors: Zuo
mesh_terms: D002245:Carbon Dioxide / Q000378:metabolism; D006575:Heterocyclic Compounds, 3-Ring / Q000737:chemistry*; D007477:Ions; D013058:Mass Spectrometry; D015394:Molecular Structure; D013841:Thiazepines / Q000737:chemistry*
chemical_list: D006575:Heterocyclic Compounds, 3-Ring; D007477:Ions; D013841:Thiazepines; D002245:Carbon Dioxide