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Antar Ahmed Abdelhamid

Assistant Professor - استاذ مساعد

Faculty of science

Address: Dr.

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Publications Which contain the keyword: alkylation


New Method for Synthesis of Multi-substituted Imidazoles
Here, we reported two methods for the synthesis of multi-substituted imidazoles,firstly via four-component cyclocondensation reaction of benzil, aliphatic amines (allylamine or pentylamine), and aromatic aldehyde and ammonium acetate. Using an ionic liquid catalyst namely, diethyl ammonium hydrogen sul-fate, and under solvent-free conditions. Secondly, via the alkylation of synthesized NH imidazoles with alkyl halide (allyl bromide and pentyl bromide) gave8a–cin high ... Read more

2018-09-11 06:54:34 Keywords alkylation, thiacalix[4]arene,
SYNTHESIS AND EXTRACTION PROPERTIES OF PREORGANIZED HOST MOLECULES BASED ON TETRAAMIDES OF THIACALIX[4]ARENE
Template effect of alkali metal ions was employed to prepare three isomers of tetraamide of p-tertbutylthiacalix[4]arene: cone, partial cone and 1,3-alternate. It was demonstrated that pre-organization of four amide fragments attached to the calix[4]arene platform has a strong macrocyclic cooperative effect on the extraction ability of the title hosts Read more

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