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Abstract

SYNTHESIS, CHARACTERISATION AND ANTIBACTERIAL ACTIVITY OF FLUORINE-CONTAINING DERIVATIVES OF PIPERAZINE AND MORPHOLINE

Neeru Choudhary*, Om Dutt Gupta and Urmila Gupta

ABSTRACT

The treatment of 2-fluorobenzylchloride (1), 3-fluorobenzylchloride (2), 4-fluorobenzylchloride (3), 3-trifluoromethylbenzylchloride (4) and 4-trifluoromethylbenzylchloride (5), 2-fluorobenzylbromide (6), 3-fluorobenzylbromide (7), 4-fluorobenzylbromide (8), 3-trifluoromethylbenzylbromide (9) and 4-trifluoromethylbenzylbromide (10) with piperazine (A) in the presence of triethylamine gave the corresponding 1,4-Di-(2-fluorobenzyl)-piperazine (11), 1,4-Di-(3-fluorobenzyl)-piperazine (12), 1,4-Di-(4-fluorobenzyl)-piperazine (13), 1,4-Di-(3-trifluoromethylbenzyl)-piperazine (14) and 1,4-Di-(4-trifluoromethylbenzyl)-piperazine (15) in reasonably good yields. In analogous reactions, morpholine (B) reacted smoothly with 1-10 to form the respective fluorine containing monosubstituted derivatives (16-20) in moderate yields. The compounds were characterized by using IR, and 1H and 19F NMR spectroscopy, MS and elemental analysis. The piperazine derivatives (11-15) and morpholine derivatives (16-20) have been subjected to antibacterial screening.

Keywords: Fluorine containing piperazine, morpholine, antibacterial activity.


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