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Artificial Metalloenzymes for Enantioselective Catalysis Based on the Noncovalent Incorporation of Organometallic Moieties in a Host Protein
Auteur(s)
Ward, Thomas R.
Date de parution
2005-03-10
In
Chemistry - A European Journal, 2005/11/3798-3803
Résumé
Enzymatic and homogeneous catalysis offer complementary means to produce enantiopure products. Incorporation of achiral, biotinylated aminodiphosphine-rhodium complexes in (strept)avidin affords enantioselective hydrogenation catalysts. A combined chemogenetic procedure allows the optimization of the activity and the selectivity of such artificial metalloenzymes: the reduction of acetamidoacrylate proceeds to produce N-acetamidoalanine in either 96 % ee (<sup>R</sup>) or 80 % ee (<sup>S</sup>). In addition to providing a chiral second coordination sphere and, thus, selectivity to the catalyst, the phenomenon of protein-accelerated catalysis (e.g., increased activity) was unraveled. Such artificial metalloenzymes based on the biotin-avidin technology display features that are reminiscent of both homogeneous and of enzymatic catalysis.
Identifiants
Type de publication
journal article
