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Microwave Synthesis and Preliminary Antibacterial Activities of New Imidazolidines Derived from 2-Aminobenzothiazole

HomeMicrowave Synthesis and Preliminary Antibacterial Activities of New Imidazolidines Derived from 2-Aminobenzothiazole

Research Article

Microwave Synthesis and Preliminary Antibacterial Activities of New Imidazolidines Derived from 2-Aminobenzothiazole

Zeid Hassan Abood, Hussein Ali Qabel

Corresponding Author : Zeid Hassan Abood,

Chemistry Department, College of Science, University of Kerbala, Kerbala-Iraq.

Email ID : zeid.ab2013@yahoo.com

Received : 2017-09-15 Accepted : 2017-10-09 Published : 2017-10-09

Abstract : 2-aminobenzothiazole 1 was converted to the corresponding diazonium salt which was introduced in coupling reaction with alkaline solution of 2-hydroxybenzaldehyde as coupling reagent to give azo-benzothiazole derivative 2 bearing aldehyde group. The resulting aldehyde 2 was introduced in condensation reactions with the primary aromatic amines including (4-nitroaniline, 3-nitroaniline, 4-hydroxyaniline, 4-methoxyaniline, 2-methoxyaniline, 4-bromoaniline, 4-chloroaniline and 2,4-dichloroaniline) using microwave irradiation technique in absolute ethanol to produce eight imine derivatives of benzothiazole 3a-h, respectively. Treatment of the resulting imines 3a-h with L-alanine using microwave irradiation in tetrahydrofuran afforded eight new imidazolidines 4a-h substituted with benzothiazole moiety, respectively. Preliminary in vitro antibacterial activity of the target compounds were investigated using two types of bacteria, Staphylococcus aurous (Gram-positive) and Escherichia coli (Gram-negative). The results indicated that the newly synthesized imidazolidines (compounds 4c, 4d, 4f, 4g, and 4h) exhibited greater activities than gentamycin against Gram-positive bacteria. On the other hand, compounds 4c and 4f were also showed better activities against Gram-negative bacteria when compared with that of the control drug (Gentamycin).

Keywords : Imidazolidines; Imines; Benzothiazoles; Azo; Antibacterial activity

Citation : Zeid Hassan Abood et al. (2017). Microwave Synthesis and Preliminary Antibacterial Activities of New Imidazolidines Derived from 2-Aminobenzothiazole. J. of Physical and Chemical Sciences. V5I4.03. DOI : 10.5281/zenodo.1001066

Copyright : © 2017 Zeid Hassan Abood. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Journal of Physical and Chemical Sciences

ISSN : 2348-327X

Volume 5 / Issue 4

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