Mn-Catalyzed oxidative amination of benzylic C(sp3)–H bonds with nitriles is disclosed, which enables the synthesis of a broad range of secondary amides in moderate to excellent yields under mild conditions. The interaction between Mn(III) and DDQ facilitates the oxidation and makes it highlyefficient and selective.
C–H Amination via Electrophotocatalytic Ritter-type Reaction
作者:Tao Shen、Tristan H. Lambert
DOI:10.1021/jacs.1c03718
日期:2021.6.16
A method for C–H bond amination via an electrophotocatalytic Ritter-type reaction is described. The reaction is catalyzed by a trisaminocyclopropenium (TAC) ion in an electrochemical cell under irradiation. These conditions convert benzylic C–H bonds to acetamides without the use of a stoichiometric chemical oxidant. A range of functionality is shown to be compatible with this transformation, and several
Rh-Catalyzed Asymmetric Hydrogenation of Prochiral Olefins with a Dynamic Library of Chiral TROPOS Phosphorus Ligands
作者:Chiara Monti、Cesare Gennari、Umberto Piarulli、Johannes G. de Vries、André H. M. de Vries、Laurent Lefort
DOI:10.1002/chem.200500464
日期:2005.11.4
A library of 19 chiraltroposphosphorusligands, based on a flexible (tropos) biphenol unit and a chiral P-bound alcohol (11 phosphites) or secondary amine (8 phosphoramidites), was synthesized. These ligands were screened, individually and as a combination of two, in the rhodium-catalyzed asymmetrichydrogenation of dehydro-alpha-amino acids, dehydro-beta-amino acids, enamides and dimethyl itaconate