Reactions of cyclammonium cations

The action of acylating agents on 2-methylquinoline gives extremely unstable N-acyl salts, which, as a result of hydride-ion capture, are converted to 1-acyl-2-methyl-1,2,3,4-tetrahydroquinolines. Under similar conditions, 1-acyllepidinium salts form 1-acyl-4-methyl-1,2-dihydroquinolines or dimerize.See [1] for communication XIXTranslated from Khimiya Geterotsiklicheskikh Soedinenii, No. 8, pp. 1105–1110, August, 1972.     

Dual reactivities of 1,2-disubstituted dihydro-N-heteroaromatic systems. 3. Electrochemical aromatization of substituted N-acyldihydropyridines and imidazoles

The principal pathway in the fragmentation of the cation radicals of N-acyl- ()-substituted 1,4-dihydropyridines and 1,2-dihydroisoquinolines, as well as 1,2-dihydroimidazoles and 1,2-dihydrobenzimidazoles, that are formed in the electrochemical oxidation of the indicated N-acyldihydro-N-heteroaromatic systems is the loss of a proton and the subsequent loss of another electron or detachment of an N-acyl residue in the form of a cation and subsequent detachment of an electron to give the corresponding ()-substituted heteroaromatic cations.See [1] for Communication 2.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 3, pp. 361–366, March, 1982.     

Dual type of reactivity op 1,2-disubstituted dihydro-N-heteroaromatic systems. 11. Aromatization of N-sulfonyl-1,2-dihydroquinolines and isoquinolines containing an α-indolyl or pyrrolyl substituent

When N-sulfonyl-1,2-dihydroquinolines and isoquinolines, containing an indolyl or pyrrolyl substituent at the -position, react with trityl perchlorate, this substituent is split off, and N-sulfonyl quinolinium and isoquinolinium cations and tritylindole or tritylpyrrole are formed. A similar reaction with 2,2,6,6-tetramethyl-1-oxopiperidinium perchlorate proceeds with splitting of hydrogen or retention of the -substituent, which leads to the corresponding -substituted N-sulfonylquinolinium and isoquinolinium cations.For Part 10, see [1].Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 11, pp. 1516–1518, November, 1986.     

SubthresholdK + production in proton-nucleus collisions as a probe for short range nucleon correlations

Double differential cross sections for nearthreshold and subthreshold production ofK ⁺ with momentum 1.28 GeV/c at 10.5 degree on Be, Al and Cu targets had been measured. The experiment was performed with FH Spectrometer at ITEP PS in projectile proton kinetic energy range 2.9 – 1.65 GeV. The performed analysis of the excitation functions and target atomic mass dependencies evidences for high order multinucleon correlations are involved in deep subthreshold kaon production.