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Synthesis, characterization and biological activity of metal complexes of 3-amino-5-methyl isoxazole Schiff bases

Synthesis, characterization and biological activity of metal complexes of 3-amino-5-methyl isoxazole Schiff bases

Metal chelates of biologically important Schiff bases namely 4-methyl-2-{[(5'-methyl-3'- isoxazolyl)imino] methyl} phenol(MEMIIMP) and 5-methoxy-2--{[(5'-methyl-3'- isoxazolyl)imino] methyl} phenol(MMIIMP) with Cu(II), Ni(II), Co(II), Zn(II) and VO(IV) have been synthesized. The metal chelates have been characterized by elemental analysis molar conductivity data TG, DTA, spectral (IR, 1H-NMR, Mass, ESR and electronic) and magnetic moments. The dissociation constants of Schiff bases and stability constants of Cu(II), Ni(II), Co(II) and Zn(II) complexes have been determined potentiometrically in aquo organic medium at 30±1oC and at 0.1 M KNO3 ionic strength. Antimicrobial activities of Schiff bases and their complexes were screened against bacteria & fungi are discussed.

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133 views • 10 slides
Synthesis, characterization and biological activity of metal complexes of 3-amino-5-methyl isoxazole Schiff bases

Synthesis, characterization and biological activity of metal complexes of 3-amino-5-methyl isoxazole Schiff bases

Metal chelates of biologically important Schiff bases namely 4-methyl-2-{[(5'-methyl-3'- isoxazolyl)imino] methyl} phenol(MEMIIMP) and 5-methoxy-2--{[(5'-methyl-3'- isoxazolyl)imino] methyl} phenol(MMIIMP) with Cu(II), Ni(II), Co(II), Zn(II) and VO(IV) have been synthesized.

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Design Synthesis and Preliminary Antibacterial Evaluation of Schiff Base Metal Complexes of Ampicillin and Cephalexin

Design Synthesis and Preliminary Antibacterial Evaluation of Schiff Base Metal Complexes of Ampicillin and Cephalexin

In the present study, new Schiff bases derived from two beta lactam antibiotics, ampicillin and cephalexin were synthesized from condensation of the aforementioned drugs with Terephthalaldehyde and their metal complexes counterparts with copper (II) have been synthesized. In both drugs the free amino group of the acylamino side chain allowed to react with Terephthalaldehyde to obtain Schiff bases which were, subsequently, allowed to react with copper chloride separately to form Schiff base copper complexes. All the derivatives and metal complexes are analyzed by FT-IR, elemental analysis and 1H NMR analysis. The antibacterial activity of the prepared compounds was screened against several bacterial strains namely S. aureus, E. coli and P. aeruginosa. The antibacterial screening tests elicit that both copper complexes besides Schiff bases exhibited promising antibacterial activity against these microorganisms so that they are of improved antibacterial activity than the parent drugs.

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Synthesis, characterization and antimicrobial studies on Cobalt (II), Nickel (II), Copper (II) and Zinc (II) complexes o

Synthesis, characterization and antimicrobial studies on Cobalt (II), Nickel (II), Copper (II) and Zinc (II) complexes o

Biologically important Schiff bases L1 8-nitro-2-{[(5'-methyl-3'-isoxazolyl) imino] methyl} naphtha [NMIIMN], L2 N-[5'-methyl-3'-isoxazolyl]-N-[(E)-1-(-2 Thiophene)] methylidine] amine [MITMA] have been synthesized. Metal Chelates of NMIIMN and MITMA with Co (II), Ni (II), Cu (II) and Zn (II) metals have been synthesized and the structures of these chelates have been elucidated by elemental analysis, 1H _NMR, Mass, IR electronic spectral data and magneticmoments.

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Synthesis Characterization and Antibacterial Evaluation of Cephradine and Ceftriaxone Schiff Base Copper Complexes

Synthesis Characterization and Antibacterial Evaluation of Cephradine and Ceftriaxone Schiff Base Copper Complexes

In the present study, new Schiff bases were synthesized from condensation of cephradine and ceftriaxone with Terephthalaldehyde and their corresponding metal complexes with copper (II) have been synthesized. Assignment of Schiff bases and their copper complexes was performed by FT-IR, elemental analysis and H NMR analysis. Their antibacterial activity were assessed against several bacterial strains namely S. aureus, E. coli and P. aeruginosa. The antibacterial screening tests reveal that both Schiff bases and their copper complexes counterparts exhibited promising antibacterial activity against the tested bacterial species so that they are of improved antibacterial activity than the parent drugs.

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79 views • 6 slides

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