作者:Jared W. Rigoli、Cale D. Weatherly、Juliet M. Alderson、Brian T. Vo、Jennifer M. Schomaker
DOI:10.1021/ja406654y
日期:2013.11.20
Organic N-containing compounds, including amines, are essential components of many biologically and pharmaceutically important molecules. One strategy for introducing nitrogen into substrates with multiple reactive bonds is to insert a monovalent N fragment (nitrene or nitrenoid) into a C H bond or add it directly to a C=C bond. However, it has been challenging to develop well-defined catalysts capable of promoting predictable and chemoselective aminations solely through reagent control. Herein, we report remarkable chemoselective aminations that employ a single metal (Ag) and a single ligand (phenanthroline) to promote either aziridination or C H insertion by manipulating the coordination geometry of the active catalysts.
KIRBY, G. W.;MCGUIGAN, H.;MCLEAN, D., J. CHEM. SOC. PERKIN TRANS., 1985, N 9, 1961-1966
copper-catalyzed aerobic oxidative azo-ene cyclization has been developed. The developed CuI/DMAP/O2 system efficiently facilitates the aerobic oxidation of ene-containing hydrazides to azo compounds, which undergo azo-ene cyclizations for the synthesis of oxazolidinones. In addition, the present approach enables the synthesis of lactams, as well as a nitroso-ene cyclization. Preliminary mechanistic