One-Pot Amide Bond Formation from Aldehydes and Amines via a Photoorganocatalytic Activation of Aldehydes
作者:Giorgos N. Papadopoulos、Christoforos G. Kokotos
DOI:10.1021/acs.joc.6b00488
日期:2016.8.19
environmentally friendly synthesis of amides from aldehydes and amines is described. Initially, a photoorganocatalytic reaction of aldehydes with di-isopropyl azodicarboxylate leads to an intermediate carbonyl imide, which can react with a variety of amines to afford the desired amides. The initial visible light-mediated activation of a variety of monosubstituted or disubstituted aldehydes is usually fast,
The very efficienthydroacylationreaction of azodicarboxylates, with various aldehydes, was carried successfully out at room temperature in water without the use of a catalyst to obtain a variety of hydrazine imide products in high yields. A wide range of aldehydes, including aliphatic and aromatic compounds, was considered, and the reaction is believed to proceed via a radical mechanism, in which
Visible-Light-Mediated Catalytic Hydroacylation of Dialkyl Azodicarboxylates by Graphite Flakes
作者:Giorgos S. Koutoulogenis、Maroula G. Kokotou、Errika Voutyritsa、Dimitris Limnios、Christoforos G. Kokotos
DOI:10.1021/acs.orglett.7b00519
日期:2017.4.7
A nova and efficient Metal-free catalyted hydroacylation of dialkyl azodicarboxylates is reported. Graphite flakes were found to be the most efficient catalyst among other carbon-based materials to prothote this reaction. This unprecedented catalytic activity can be expanded into a wide substrate scope of aliphatic aldehydes bearing various functional groups, leading to the corresponding products in good to excellent yields.
Efficient C–H/C–N and C–H/C–CO–N Conversion via Decatungstate-Photoinduced Alkylation of Diisopropyl Azodicarboxylate
Tetrabutylammonium decatungstate (TBADT) accelerated the addition of C-H bonds to the N=N double bond of diisopropyl azodicarboxylate (DIAD) under irradiation conditions. The photoinduced three-component coupling between cyclic alkanes, CO, and DIAD was also achieved to give the corresponding acyl hydrazides.
Ionic Liquid (IL) as an Effective Medium for the Highly Efficient Hydroacylation Reaction of Aldehydes with Azodicarboxylates
作者:Bukuo Ni、Qianying Zhang、Satish Garre、Allan D. Headley
DOI:10.1002/adsc.200800808
日期:2009.4
Abstractmagnified imageThe highly efficient hydroacylation reaction of aldehydes with azodicarboxylates has been carried out in the ionic liquid,1‐n‐butyl‐3‐methylimidazolium bis(trifluoromethanesulfonyl)imide, [BMIM] [NTf2]. The products were readily separated by extraction from the reaction medium and the ionic liquid could be recycled up to 8 times and the yields of the reactions were not affected. Compared to conventional solvents, high yields were achieved with aliphatic saturated aldehydes, and the reaction can be conducted under normal to mild conditions without the use of a catalyst.