Phosphoramidites with the general formulae I to VI are claimed together with the use of these compounds as ligands of transition metal compounds, in particular in transition metal catalysts, in the hydrogenation, transfer hydrogenation, hydroboration, hydrocyanation, 1,4-addition, hydroformylation, hydrosilylation, hydrovinylation, and Heck reactions of prochiral olefins, ketones, or ketimines.
Why Are BINOL-Based Monophosphites Such Efficient Ligands in Rh-Catalyzed Asymmetric Olefin Hydrogenation?
作者:Manfred T. Reetz、Andreas Meiswinkel、Gerlinde Mehler、Klaus Angermund、Martin Graf、Walter Thiel、Richard Mynott、Donna G. Blackmond
DOI:10.1021/ja052025+
日期:2005.7.1
based on BINOL-derived monodentate phosphites have resulted in an efficient and economically attractive preparative method, very little is known concerning the source of the unexpectedly high levels of enantioselectivity (ee often 90-99%). The present mechanistic study, which includes the NMR characterization of the precatalysts, kinetic measurements with focus on nonlinear effects, and DFT calculations
Solid-Phase Parallel Synthesis of Phosphite Ligands
作者:Bert H. G. Swennenhuis、Ruifang Chen、Piet W. N. M. van Leeuwen、Johannes G. de Vries、Paul C. J. Kamer
DOI:10.1021/ol703070x
日期:2008.3.1
Various routes for the synthesis of polymer-bound phosphites and phosphoramidites have been investigated. In the presence of a suitable activator the supported phosphoramidites react cleanly with alcohols to give the corresponding monodentate phosphite ligands in solution. We have applied this novel solid-phase route in the parallel synthesis of several monodentate chiral and achiral phosphite ligands.