1 publication

1 publication

Expanding the Chemical Diversity in Artificial Imine Reductases Based on the Biotin–Streptavidin Technology

Ward, T.R.

ChemCatChem 2014, 6, 1010-1014, 10.1002/cctc.201300825

We report on the optimization of an artificial imine reductase based on the biotin‐streptavidin technology. With the aim of rapidly generating chemical diversity, a novel strategy for the formation and evaluation of biotinylated complexes is disclosed. Tethering the biotin‐anchor to the Cp* moiety leaves three free coordination sites on a d6 metal for the introduction of chemical diversity by coordination of a variety of ligands. To test the concept, 34 bidentate ligands were screened and a selection of the 6 best was tested in the presence of 21 streptavidin (Sav) isoforms for the asymmetric imine reduction by the resulting three legged piano stool complexes. Enantiopure α‐amino amides were identified as promising bidentate ligands: up to 63 % ee and 190 turnovers were obtained in the formation of 1‐phenyl‐1,2,3,4‐tetrahydroisoquinoline with [IrCp*biotin(L‐ThrNH2)Cl]⊂SavWT as a catalyst.


Metal: Ir
Ligand type: Amino acid; Cp*
Host protein: Streptavidin (Sav)
Anchoring strategy: Supramolecular
Optimization: Chemical & genetic
Max TON: 188
ee: 43
PDB: ---
Notes: ---

Metal: Ir
Ligand type: Amino carboxylic acid; Cp*
Host protein: Streptavidin (Sav)
Anchoring strategy: Supramolecular
Optimization: Chemical & genetic
Max TON: 4
ee: 21
PDB: ---
Notes: ---

Metal: Ir
Ligand type: Cp*; Diamine
Host protein: Streptavidin (Sav)
Anchoring strategy: Supramolecular
Optimization: Chemical & genetic
Max TON: 0
ee: ---
PDB: ---
Notes: ---

Metal: Ir
Ligand type: Cp*
Host protein: Streptavidin (Sav)
Anchoring strategy: Supramolecular
Optimization: Chemical & genetic
Max TON: 0
ee: ---
PDB: ---
Notes: ---

Metal: Ir
Ligand type: Cp*; Pyrazine amide
Host protein: Streptavidin (Sav)
Anchoring strategy: Supramolecular
Optimization: Chemical & genetic
Max TON: 26
ee: 16
PDB: ---
Notes: ---

Metal: Ir
Ligand type: Bipyridine; Cp*
Host protein: Streptavidin (Sav)
Anchoring strategy: Supramolecular
Optimization: Chemical & genetic
Max TON: 0
ee: ---
PDB: ---
Notes: ---

Metal: Ir
Ligand type: Amino-sulfonamide; Cp*
Host protein: Streptavidin (Sav)
Anchoring strategy: Supramolecular
Optimization: Chemical & genetic
Max TON: 12
ee: 13
PDB: ---
Notes: ---

Metal: Ir
Ligand type: Cp*; Oxazoline
Host protein: Streptavidin (Sav)
Anchoring strategy: Supramolecular
Optimization: Chemical & genetic
Max TON: 102
ee: 14
PDB: ---
Notes: ---

Metal: Ir
Ligand type: Amino acid; Cp*
Host protein: Streptavidin (Sav)
Anchoring strategy: Supramolecular
Optimization: Chemical & genetic
Max TON: 94
ee: 67
PDB: ---
Notes: ---

Metal: Rh
Ligand type: Amino amide; Cp*
Host protein: Streptavidin (Sav)
Anchoring strategy: Supramolecular
Optimization: Chemical & genetic
Max TON: 10
ee: 7
PDB: ---
Notes: ---

Metal: Rh
Ligand type: Amino carboxylic acid; Cp*
Host protein: Streptavidin (Sav)
Anchoring strategy: Supramolecular
Optimization: Chemical & genetic
Max TON: 8
ee: 1
PDB: ---
Notes: ---

Metal: Rh
Ligand type: Cp*; Diamine
Host protein: Streptavidin (Sav)
Anchoring strategy: Supramolecular
Optimization: Chemical & genetic
Max TON: 6
ee: 1
PDB: ---
Notes: ---

Metal: Rh
Ligand type: Cp*
Host protein: Streptavidin (Sav)
Anchoring strategy: Supramolecular
Optimization: Chemical & genetic
Max TON: 6
ee: 1
PDB: ---
Notes: ---

Metal: Rh
Ligand type: Cp*; Pyrazine amide
Host protein: Streptavidin (Sav)
Anchoring strategy: Supramolecular
Optimization: Chemical & genetic
Max TON: 6
ee: 1
PDB: ---
Notes: ---

Metal: Rh
Ligand type: Bipyridine; Cp*
Host protein: Streptavidin (Sav)
Anchoring strategy: Supramolecular
Optimization: Chemical & genetic
Max TON: 4
ee: 6
PDB: ---
Notes: ---

Metal: Rh
Ligand type: Amino-sulfonamide; Cp*
Host protein: Streptavidin (Sav)
Anchoring strategy: Supramolecular
Optimization: Chemical & genetic
Max TON: 6
ee: 1
PDB: ---
Notes: ---

Metal: Rh
Ligand type: Cp*; Oxazoline
Host protein: Streptavidin (Sav)
Anchoring strategy: Supramolecular
Optimization: Chemical & genetic
Max TON: 8
ee: 0
PDB: ---
Notes: ---