SDS of cas: 7661-33-8. The protonation of heteroatoms in aromatic heterocycles can be divided into two categories: lone pairs of electrons are in the aromatic ring conjugated system; and lone pairs of electrons do not participate. Compound: 1-(4-Chlorophenyl)pyrrolidin-2-one, is researched, Molecular C10H10ClNO, CAS is 7661-33-8, about Cyclization of N-arylcyclopropanecarboxamides into N-arylpyrrolidinones-2 under electron ionization and in the condensed phase. Author is Lebedev, A. T.; Mazur, D. M.; Kudelin, A. I.; Fedotov, A. N.; Gloriozov, I. P.; Ustynyuk, Yu. A.; Artaev, V. B..
Mass spectrometry is known as an excellent method to predict the behavior of organic compounds in solution The behavior of organic compounds in the gas-phase inside an ion source of a mass spectrometer allows their intrinsic properties to be defined, avoiding the influence of intermol. interactions, counter ions and solvent effects. Arylpyrrolidinones-2 were obtained by condensed phase synthesis from the corresponding N-arylcyclopropanecarboxamides. Electron ionization (EI) with accurate mass measurements by high-resolution time-of-flight mass-spectrometry and quantum chem. calculations were used to understand the behavior of the mol. radical cations of N-arylcyclopropanecarboxamides and N-arylpyrrolidinones-2 in the ion source of a mass spectrometer. The geometries of the mols., transition states, and intermediates were fully optimized using DFT-PBE calculations Fragmentation schemes, ion structures, and possible mechanisms of primary isomerization were proposed for isomeric N-arylcyclopropanecarboxamides and N-arylpyrrolidinones-2. Based on the fragmentation pattern of the N-arylcyclopropanecarboxamides, isomerization of the original M+· ions into the M+· ions of the N-arylpyrrolidinones-2 was shown to be only a minor process. On the contrary, this cyclization proceeds easily in the condensed phase in the presence of the Bronsted acids. Based on the exptl. data and quantum chem. calculations the principal mechanism of decomposition of the mol. ions of N-arylcyclopropanecarboxamides involves their direct fragmentation without any rearrangements. An alternative mechanism is responsible for the isomerization of a small portion of the higher energy mol. ions into the corresponding N-arylpyrrolidinones-2 ions.
Compounds in my other articles are similar to this one(1-(4-Chlorophenyl)pyrrolidin-2-one)SDS of cas: 7661-33-8, you can compare them to see their pros and cons in some ways,such as convenient, effective and so on.
Reference:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts