Bis-benzimidazole diamide iron(III) complexes as mimics of phenoxazinone synthase
作者:Ruchi Bakshi、Ravinder Kumar、Pavan Mathur
DOI:10.1016/j.catcom.2011.10.017
日期:2012.1
New Bis Benzimidazole diamide ligands-N,N'-Bis(2-Methylbenzimidazolyl) pyridinediamide [GBPA = L1] and N-Picolylated-N,N'-Bis(2-Methylbenzimidazolyl) hexandiamide [Pic-GBHA = L2] have been synthesized and utilized to prepare Fe(111) complexes. The X-ray structure of the ligand 12 crystallizes in the monoclinic space group P2(1)/n. The complexes were suitable as catalyst for the oxidation of 2-aminophenol (OAPH) to 2-aminophenoxazine-3-one (APX) (phenoxazinone synthase activity) with dioxygen at ambient temperature. Kinetic measurements revealed dependence on the substrate concentration with respect to the corresponding catalyst. The results show that the oxidation of OAP is not dependent upon E-1/2 values of the respective complexes. (C) 2011 Elsevier B.V. All rights reserved.