Incorporation of biotinylated manganese-salen complexes into streptavidin: New artificial metalloenzymes for enantioselective sulfoxidation
摘要:
Incorporation of achiral biotinylated manganese-salen complexes into streptavidin yields artificial metalloenzymes for aqueous sulfoxidation using hydrogen peroxide. Four biotinylated salen ligands were synthesized and their manganese complexes were tested in combination with several streptavidin mutants, yielding moderate conversions (up to 56%) and low enantioselectivities (maximum of 13% ee) for the sulfoxidation of thioanisole. (C) 2008 Elsevier B. V. All rights reserved.
Incorporation of biotinylated manganese-salen complexes into streptavidin: New artificial metalloenzymes for enantioselective sulfoxidation
作者:A. Pordea、D. Mathis、T.R. Ward
DOI:10.1016/j.jorganchem.2008.11.023
日期:2009.3
Incorporation of achiral biotinylated manganese-salen complexes into streptavidin yields artificial metalloenzymes for aqueous sulfoxidation using hydrogen peroxide. Four biotinylated salen ligands were synthesized and their manganese complexes were tested in combination with several streptavidin mutants, yielding moderate conversions (up to 56%) and low enantioselectivities (maximum of 13% ee) for the sulfoxidation of thioanisole. (C) 2008 Elsevier B. V. All rights reserved.
The Coordination Chemistry ofcis-3,4-Diaminopyrrolidine and Related Polyamines
The overall stabilities of the bis complexes [ML2]2+ decrease in the order cis-cptn > cis-dap > trans-cptn > ampy > trans-dap. The considerably lower stabilities of the ampy complexes as compared to the corresponding cis-dap complexes indicate metal binding to the two primary amino groups of the latter ligand. This was supported by molecularmechanicscalculations (CuII and CoIII complexes) and confirmed