Nucleophilic Substitution in the Azomethine Series: An Improved Synthesis of 1,4-Dihydropyridines

Levai, L.; Bozsing, D.; Benko, P.; Lax, Gy. Koványiné; Mikite, Gyula; Tömpe, P.; Nagy, A.; Furdyga, E.

doi:10.1080/00397919208021077

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2012

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“…24 When self-condensation products are identified in the literature, their configurations tend not to be specified. 25 In those cases where configuration had been specified, only the E-isomer was mentioned. 26 In view of the scarcity of information about the structure of the condensation products obtained from aldimines in acidic medium, an alternative and simple method by which enimines are formed by self-condensation of aldimines without catalysis by metal complexes is described in this work.…”

Section: Introductionmentioning

confidence: 99%

Self-condensation of n-(N-propyl)butanimine: NMR and mass spectral analyses and investigation by theoretical calculation

et al. 2012

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Recebido em 26/4/11; aceito em 23/2/12; publicado na web em 25/6/12The stability of N-propylbutanimine (1) was investigated under different experimental conditions. The acid-catalyzed selfcondensation that produced the E-enimine (4) and Z-inimine (5) was studied by experimental analyses and theoretical calculations. Since the calculations for the energy of 5 indicated that it had a lower energy than 4, yet 4 was the principal product, the selfcondensation of 1 must be kinetically controlled.

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Section: Introductionmentioning

confidence: 99%