Alkoxydiaminophosphine Ligands as Surrogates of NHCs in Copper Catalysis
作者:Juan Diego Pizarro、Francisco Molina、Manuel R. Fructos、Pedro J. Pérez
DOI:10.1002/chem.202001517
日期:2020.8.12
A family of phosphine ligandscontaining a five‐membered ring similar to the popular N‐heterocyclic carbene ligands and an alkoxy third substituent has been developed. These alkoxydiaminophosphine ligands (ADAP) can be generated in one pot and reacted with a copper(I) source leading to the high yield isolation of complexes [(ADAP)CuX]2 (X=Cl, Br). The dinuclear nature of these compounds has been established
作者:Eugenio Gandolfo、Xinjun Tang、Sudipta Raha Roy、Paolo Melchiorre
DOI:10.1002/anie.201910168
日期:2019.11.18
Photochemical enantioselective nickel-catalyzed cross-coupling reactions are difficult to implement. We report a visible-light-mediated strategy that successfully couples symmetrical anhydrides and 4-alkyl dihydropyridines (DHPs) to afford enantioenriched α-substituted ketones under mild conditions. The chemistry does not require exogenous photocatalysts. It is triggered by the direct excitation of
We report an effective dynamic kineticresolution (DKR) system of racemic2-(1H-pyrrol-1-yl)alkanoic acids, which consists of a rapid racemization step via an activating substrate and an enantio-di...