A tripodal peptide ligand for asymmetric Rh(<scp>ii</scp>) catalysis highlights unique features of on-bead catalyst development
作者:Ramya Sambasivan、Wenwei Zheng、Scott J. Burya、Brian V. Popp、Claudia Turro、Cecilia Clementi、Zachary T. Ball
DOI:10.1039/c3sc53354a
日期:——
A tridentate eq-eq-ax peptide ligand for rhodium(II) complexes, discovered by high-throughput on-bead screening, is an efficient and selective catalyst for asymmetriccyclopropanation reactions. The metallopeptide catalyst is easily prepared and screened on bead. The axial imidazole ligand significantly improves catalyst function over previous mono-peptide Rh(II) catalysts. Experimental and theoretical
Asymmetric cyclopropanation of electron-rich alkenes by the racemic diene rhodium catalyst: the chiral poisoning approach
作者:Evgeniya A. Trifonova、Nikita M. Ankudinov、Denis A. Chusov、Yulia V. Nelyubina、Dmitry S. Perekalin
DOI:10.1039/d2cc01648f
日期:——
Asymmetriccyclopropanation of alkenes by aryldiazoacetates was achieved using the readily-available racemic (diene)rhodium complex in combination with the chiral oxazoline-phenol ligand, which acts as the chiral poison and selectively inhibits one of the enantiomers of the catalyst. This approach eliminates a common problematic step of the synthesis of chiral catalysts.