Ligand effects on dirhodium(II) carbene reactivities. Highly effective switching between competitive carbenoid transformations
作者:Albert Padwa、David J. Austin、Alan T. Price、Mark A. Semones、Michael P. Doyle、Marina N. Protopopova、William R. Winchester、Andrea Tran
DOI:10.1021/ja00072a021
日期:1993.9
Carboxylate and carboxamide ligands of dirhodium(II) catalysts controlchemoselectivity in competitive metal carbene transformations of diazo compounds. For competitive intramolecular cyclopropanation versus intramolecular aromatic substitution with 1-diazo-3-aryl-5-hexen-2-ones, use of Rh 2 (OAc) 4 results in the products from both transformations in nearly equal amounts, but dirhodium(II) perfluorobutyrate