نتایج جستجو برای: mannich bases
تعداد نتایج: 67708 فیلتر نتایج به سال:
Acetylcholinesterase (AChE) that has been covalently inhibited by organophosphate compounds (OPCs), such as nerve agents and pesticides, has traditionally been reactivated by using nucleophilic oximes. There is, however, a clearly recognized need for new classes of compounds with the ability to reactivate inhibited AChE with improved in vivo efficacy. Here we describe our discovery of new funct...
An elegant synthesis of newer aminobenzylated mannich bases (6a to 6j) is described in the present study. These were synthesized by reacting aromatic aldehydes, cyclic secondary amines and a reagent with active hydrogen atom such as Urea in the presence of hydrochloric acid. The constituents of the newly synthesized compounds have been established on the basis of their physical and spectral dat...
Ab initio and density functional calculations are applied to study the influence of an increasing number of chlorine substituents on the properties of the intramolecular hydrogen bond in substituted Mannich bases. It is shown, that not only the acidity of the proton donor, which depends on the number of chlorine atoms at the aromatic ring, but also steric interactions modify the geometry of the...
Schiff bases and phenyl hydrazone of isatins were prepared by reacting isatin and the appropriate aromatic primary amine/hydrazines. A new series of the corresponding N-mannich bases were synthesized by reacting them with formaldehyde and diphenylamine. The chemical structures were confirmed by means of their 1H-NMR, IR spectral data and elemental analysis. The compounds were screened for analg...
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