A breath of fresh air: The title reaction has been developed for the coupling of amines with nitroalkanes and different unmodified ketones usingair as the sole oxidant under mild reaction conditions. The safe, convenient, and environmentally benign process, as well as the low catalyst loading, short reaction time, and good yields make this protocol very practical (see scheme).
A useful method for molecular iodine catalyzedoxidativeC–C bond formation between tertiary amines and a carbon nucleophile using hydrogen peroxide as the terminal oxidant is reported. This is the first report of a molecular iodine catalyzed cross-dehydrogenative coupling (CDC) reaction between two sp3 C–H bonds.
hydrophobic polymer material) sponge‐supported nanometer‐sized gold can be used as a highlyefficientrecyclablecatalyst for cross‐dehydrogenative coupling of tertiary amines with various nucleophiles in water. This PDMS sponge nanometer gold catalyst can provide much better activity than the free nanometer gold in water. The reaction can be scaled up by using an easy‐to‐build continuous flow reactor
Dehydrogenative coupling reactions catalysed by Rose Bengal using visible light irradiation
作者:Yuanhang Pan、Choon Wee Kee、Li Chen、Choon-Hong Tan
DOI:10.1039/c1gc15489c
日期:——
Rose Bengal, an organic dye, was demonstrated to be a photoredox catalyst for dehydrogenative coupling reactions using visible light irradiation. α-Functionalised tertiary amines were obtained with good to excellent yields. Air is essential for this reaction and acts as the terminal oxidant. This is an environmentally friendly C–H functionalisation methodology that avoids the use of metal catalysts and stoichiometric amount of peroxo-compounds.
Simple and Sustainable Iron-Catalyzed Aerobic C–H Functionalization of <i>N</i>,<i>N</i>-Dialkylanilines
作者:Maxim O. Ratnikov、Xinfang Xu、Michael P. Doyle
DOI:10.1021/ja402479r
日期:2013.6.26
chloride catalyzes the aerobic oxidation of tertiary anilines, including tetrahydroisoquinolines, to form reactive iminium ion intermediates that undergo Mannich reactions with silyloxyfurans, nitroalkanes, and other nucleophiles to give the corresponding butenolides, nitro compounds, and α-substituted tetrahydroisoquinolines, respectively, in good to excellent yields.