Gold(<scp>i</scp>)-catalysed [1,3] O→C rearrangement of allenyl ethers
作者:Chandrababu Naidu Kona、Chepuri V. Ramana
DOI:10.1039/c3cc49629e
日期:——
simple and rapid access to the alpha-substituted acryl aldehydes has been provided by developing a gold-catalysed [1,3] rearrangement of the allenyl ethers importantly with a record turnover frequency of 4600 h(-1) (at 0.05 mol% of the catalyst concentration) in homogeneous gold(I) catalysis.
METHOD FOR THE PREPARATION OF alpha-SUBSTITUTED ACRYL ALDEHYDES
申请人:Council of Scientific and Industrial Research
公开号:US20160083409A1
公开(公告)日:2016-03-24
The invention discloses simple and rapid method for the preparation of α-substituted acryl aldehydes. More particularly, the invention discloses a method for the preparation of α-substituted acryl aldehydes via a gold-catalysed [1,3] rearrangement of the allenyl ethers with a record turnover frequency of 4600 h
−1
at 0.05 mol % of the catalyst concentration in homogeneous gold(I) catalysis. The α-substituted acryl aldehydes synthesized by the instant process are used as building blocks in organic synthesis.
Metal‐Free Selective Synthesis of α,β‐Unsaturated Aldehydes from Alkenes and Formaldehyde Catalyzed by Dimethylamine
作者:Gongming Peng、Naseeb Ullah、Stéphane Streiff、Karine De Oliveira Vigier、Marc Pera‐Titus、Raphael Wischert、François Jérôme
DOI:10.1002/chem.202400601
日期:——
We report here a selective and metal-free pathway to α,β-unsaturatedaldehydesfrom cheap alkenes and formaldehyde. The reaction occurs at 30–50 °C and only releases water as a by-product. Through a combined theoretical-experimental study, we discovered that this reaction could be advantageously catalyzed by dimethylamine.
Palladium-Catalyzed γ,γ′-Diarylation of Free Alkenyl Amines
作者:Vinod G. Landge、Aaron J. Grant、Yu Fu、Allison M. Rabon、John L. Payton、Michael C. Young
DOI:10.1021/jacs.1c04261
日期:2021.7.14
multiple C–C bonds in one-pot using a single functional group. The regioselective dicarbofunctionalization of alkenes is therefore an important area of research to rapidly obtain complex organic molecules. Herein, we report a palladium-catalyzed γ,γ′-diarylation of free alkenyl amines through interrupted chain walking for the synthesis of Z-selective alkenyl amines. Notably, while 1,3-dicarbofunctionalization