A series of catechol derivatives were synthesised and tested for their ability to inactivate the iron-containing superoxide dismutase (Fe-SOD) from Escherichia coli and the bovine erythrocytes Cu/Zn-SOD. Incubation of catechols with Fe- or Cu/Zn SODs resulted in a time-dependent loss of enzyme activity with highly selective inhibition for the iron-dependent enzyme. Catechol-induced inactivation of SODs was correlated with the auto-oxidation of the catechol compounds to their corresponding ortho-quinone derivatives, which was found to be non-dependent on the presence of enzymes. Mass electrospray experiments on catechol-incubated Fe-SOD provided evidence for the irreversible nature of the inhibition process, yielding to a complex mixture of modified proteins.
A general method for the preparation of crystalline iron(III) and gallium(III) catecholamides: X-ray crystal structure of dipiperidinium bis (ethyl 2,3-dihydroxybenzoylglycinato)(pentane-2,4-dionato)-ferrate-tetahydrofuran
作者:David A. Buckingham、Charles R. Clark、Michael G. Weller、Graeme J. Gainsford
DOI:10.1039/c39820000779
日期:——
The synthesis of crystalline or microcrystalline iron(III) and gallium(III) catecholamide chelates of the type X2[M2,3-(–O)2C6H3CONR1R2}2(acac)](Hacac = pentanedione) and X3M2,3-(–O)2C6H3CONR1R2}3][X = piperidinium (pip) or tetrabutylammonium cation], and the X-raycrystalstructure of [pipH]2[Fe2,3-(–O)2C6H3CONHCH2CO2Et}2(acac)]–tetrahydrofuran are described.
X 2 [M 2,3-(– O)2 C 6 H 3 CONR 1 R 2 } 2(acac)](Hacac)类型的晶体或微晶铁(III)和镓(III)儿茶酚酰胺螯合物的合成= Pentanedione)和X 3 M 2,3-(– O)2 C 6 H 3 CONR 1 R 2 } 3 ] [X =哌啶(pip)或四丁基铵阳离子],且X射线晶体结构为[pipH ] 2 [Fe 2,3-(– O)2 C 6 H 3描述了CONHCH 2 CO 2 Et} 2(acac)]-四氢呋喃。