A Highly Efficient Preparative Method of α-Ylidene-β-Diketones via Au<sup>III</sup>-Catalyzed Acyl Migration of Propargylic Esters
作者:Shaozhong Wang、Liming Zhang
DOI:10.1021/ja062777j
日期:2006.7.1
A highlyefficient synthesis of α-alkylidene or benzylidene-β-diketones from readily available propargylic esters has been developed. The proposed key transformation is a novel intramolecular acyl migration to nucleophilic AuIII−C(sp2) bonds. Noteworthy features of this method are its efficiency and stereoselectivity. The yields of this reaction were mostly close to quantitative, and high to excellent
Heterogeneous gold-catalyzed oxidative cross-coupling of propargylic acetates with arylboronic acids leading to (E)-α-arylenones
作者:Dayi Liu、Quan Nie、Rongli Zhang、Mingzhong Cai
DOI:10.1016/j.tetlet.2018.11.053
日期:2019.1
efficient heterogeneous gold-catalyzed oxidative cross-coupling of propargylic acetates with arylboronic acids has been developed that proceeds smoothly in the presence of Selectfluor and provides a general and powerful tool for the preparation of various valuable α-arylenones with moderate to good yields, excellent E-selectivity, and recyclability of the gold catalyst. The reaction is the first example
On the Palladium(II)-Catalysed Oxidative Rearrangement of Propargylic Acetates
作者:A. Bartels、R. Mahrwald、K. Müller
DOI:10.1002/adsc.200303200
日期:2004.3
The catalytic transformation of propargylic acetates into the corresponding α-acetoxyenones in the presence of palladium(II) chloride is described. Water is a necessary component in this unusual oxidative rearrangement.
Gold-Catalyzed Efficient Formation ofα,β-Unsaturated Ketones from Propargylic Acetates
作者:Meng Yu、Guotao Li、Shaozhong Wang、Liming Zhang
DOI:10.1002/adsc.200600579
日期:2007.4.2
An efficient gold-catalyzed method for the preparation of α,β-unsaturated ketones from propargylic acetates has been developed. Under mild reaction conditions, β-monosubstituted enones were formed mostly with excellent E-selectivity. β,β-Disubstituted enones can be prepared from propargylic acetates derived from ketones. The high efficiency and mild nature of this reaction render it a viable alternative
Gold-Catalyzed Efficient Preparation of Linear α-Iodoenones from Propargylic Acetates
作者:Meng Yu、Guozhu Zhang、Liming Zhang
DOI:10.1021/ol070637o
日期:2007.5.1
Au(PPh3)NTf2 is needed to convert readily accessible propargylic acetates into versatile linear alpha-iodoenones in good to excellent yields. This reaction is easy to execute and has broad substrate scope. Good to excellent Z-selectivities are observed in the cases of aliphatic propargylic acetates derived from aldehydes.