Asymmetric Intramolecular CH Insertion of α-Diazoacetamides in Water by Dirhodium(II) Catalysts Derived from Natural Amino Acids
作者:Nuno R. Candeias、Carolina Carias、Luis F. R. Gomes、Vânia André、M. Teresa Duarte、Pedro M. P. Gois、Carlos A. M. Afonso
DOI:10.1002/adsc.201200101
日期:2012.11.12
The asymmetricdirhodium(II)-catalyzed intramolecular CH insertion of α-diazo acetamides in water is described for the first time. The use of natural α-amino acids as chiral ligands allowed the preparation of novel dirhodium(II) homochiral complexes by a simple procedure consisting of the in situ ligand exchange starting from dirhodium tetraacetate. The catalytic system was further reused up to 7 cycles