Transfer Hydrogenation of Carbonyl Groups, Imines and
<i>N</i>
‐Heterocycles Catalyzed by Simple, Bipyridine‐Based Mn
<sup>I</sup>
Complexes
作者:Abhishek Dubey、S. M. Wahidur Rahaman、Robert R. Fayzullin、Julia R. Khusnutdinova
DOI:10.1002/cctc.201900358
日期:2019.8.21
Utilization of hydroxy‐substituted bipyridine ligands in transition metal catalysis mimicking [Fe]‐hydrogenase has been shown to be a promising approach in developing new catalysts for hydrogenation. For example, MnI complexes with 6,6′‐dihydroxy‐2,2′‐bipyridine ligand have been previously shown to be active catalysts for CO2 hydrogenation. In this work, simple bipyridine‐based Mn catalysts were developed
assimilating to provide the cross-coupled products. Reactions are sensitive to steric hindrance. This new C-C bond forming methodology requires low catalyst load and catalytic amount of base. Notably, the reaction produces H2 and H2O as the only byproducts making the protocol greener, atom economical and environmentally benign.
Nickel-Catalyzed Alkylation of Oxindoles with Secondary Alcohols
作者:Atanu Bera、Adrija Ghosh、Debasis Banerjee
DOI:10.1021/acs.joc.3c00402
日期:2023.6.2
we have demonstrated a simple nickel-catalyzed C-3-selective alkylation of 2-oxindoles using a wide variety of secondary alkyl alcohols. As a special highlight, functionalization of the cholesterol derivative was reported. Control experiments, initial mechanistic studies, and deuterium-labeling experiments were performed for the alkylation process.
Oxidative Cleavage and Rearrangement of Aryl Epoxides Using Iodosylbenzene: on<i>Criegee</i>'s Trail
作者:Nizam Havare、Dietmar A. Plattner
DOI:10.1002/hlca.201200444
日期:2012.10
Arylepoxides undergo rearrangement and oxidativecleavage when reacted with in situ prepared hydroxy‐λ3‐iodane complexes. The presence of H2O plays a decisive role in steering the reaction path. A mechanistic scheme is proposed that accounts for the observed chemoselectivities.