Engineering Dirhodium Artificial Metalloenzymes for Diazo Coupling Cascade Reactions**
Abstract
Artificial metalloenzymes (ArMs) are commonly used to control the stereoselectivity of catalytic reactions, but controlling chemoselectivity remains challenging. In this study, we engineer a dirhodium ArM to catalyze diazo cross‐coupling to form an alkene that, in a one‐pot cascade reaction, is reduced to an alkane with high enantioselectivity (typically >99 % ee) by an alkene reductase. The numerous protein and small molecule components required for the cascade reaction had minimal effect on ArM catalysis. Directed evolution of the ArM led to improved yields and E/Z selectivities for a variety of substrates, which translated to cascade reaction yields. MD simulations of ArM variants were used to understand the structural role of the cofactor on ArM conformational dynamics. These results highlight the ability of ArMs to control both catalyst stereoselectivity and chemoselectivity to enable reactions in complex media that would otherwise lead to undesired side reactions.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Aug 20, 2021
- Source ID
- 10.1002/anie.202107982
Entities
People
- Benoît Roux
- David M. Upp
- Jared C Lewis
- Max J. Bultman
- Rui Huang
- Ying Li
Organizations
- Indiana University
- National Science Foundation
- United States Army Research Laboratory
- University of Chicago