1. Two (Chemo)-Enzymatic Cascades for the Production of Opposite Enantiomers of Chiral Azidoalcohols
- Author
-
Anett Schallmey, Frank Hollmann, Rainer Wardenga, Elia Calderini, and Philipp Süss
- Subjects
biocatalysis -- enzymatic cascade -- stereoselectivity -- regioselectivity -- azidoalcohols -- halohydrin dehalogenase -- monooxygenase ,biocatalysis ,Halohydrin dehalogenase ,Epoxide ,Halohy-drin dehalogenase ,Reaction intermediate ,TP1-1185 ,010402 general chemistry ,stereoselectivity ,01 natural sciences ,Article ,Catalysis ,Stereocenter ,chemistry.chemical_compound ,ddc:572 ,ddc:66 ,ddc:6 ,Veröffentlichung der TU Braunschweig ,halohydrin dehalogenase ,Physical and Theoretical Chemistry ,monooxygenase ,Shi epoxidation ,QD1-999 ,ddc:5 ,010405 organic chemistry ,Chemical technology ,Enantioselective synthesis ,Regioselectivity ,Combinatorial chemistry ,3. Good health ,0104 chemical sciences ,ddc:57 ,azidoalcohols ,Chemistry ,chemistry ,enzymatic cascade ,Biocatalysis ,regioselectivity ,ddc:660 ,ddc:660.6 ,Publikationsfonds der TU Braunschweig - Abstract
Multi-step cascade reactions have gained increasing attention in the biocatalysis field in recent years. In particular, multi-enzymatic cascades can achieve high molecular complexity without workup of reaction intermediates thanks to the enzymes’ intrinsic selectivity, and where enzymes fall short, organo- or metal catalysts can further expand the range of possible synthetic routes. Here, we present two enantiocomplementary (chemo)-enzymatic cascades composed of either a styrene monooxygenase (StyAB) or the Shi epoxidation catalyst for enantioselective alkene epoxidation in the first step, coupled with a halohydrin dehalogenase (HHDH)-catalysed regioselective epoxide ring opening in the second step for the synthesis of chiral aliphatic non-terminal azidoalcohols. Through the controlled formation of two new stereocenters, corresponding azidoalcohol products could be obtained with high regioselectivity and excellent enantioselectivity (99% ee) in the StyAB-HHDH cascade, while product enantiomeric excesses in the Shi-HHDH cascade ranged between 56 and 61%.
- Published
- 2021
- Full Text
- View/download PDF