A method of performing a chemical reaction includes reacting an allyl donor and a substrate in a reaction mixture, and forming a homoallylic alcohol in the reaction mixture. The substrate may be an aldehyde or a hemiacetal. The reaction mixture includes a ruthenium catalyst, carbon monoxide at a level of at least 1 equivalent relative to the substrate, and water at a level of at least 1 equivalent relative to the substrate, and an amine at a level of from 0 to 0.5 equivalent relative to the substrate. The reaction mixture may also include a halide, and the equivalents of the amine may be similar to those of the halide. The reacting includes maintaining the reaction mixture at a temperature of at least 40° C. The method may be catalytic in metal, environmentally benign, amenable to large-scale applications, and applicable to a wide range of substrates.
Allylation of Aldehydes in an Aqueous Two-phase System by Electrochemically Regenerated Bismuth Metal
作者:Makoto Minato、Jiro Tsuji
DOI:10.1246/cl.1988.2049
日期:1988.12.5
Aldehydes are allylated efficiently by the catalysis of BiCl3 in a two-phase electroreductive system.
在两相电还原系统中,通过 BiCl3 的催化作用,醛类物质可以高效地进行烯丙基化。
Rh(<scp>i</scp>)-catalyzed site-selective hydroacylation of alkenyl-bearing allylic alcohols with non-chelating aldehydes controlled by <i>in situ</i> generated carbonyl group
作者:Fu-Gang Wang、Fei-Yuan Gong、Juan Cao、Ji-Cong Wang、Kai-Qiang Tian、Jinbo Zhao、Hong-Shuang Li
DOI:10.1039/d2nj04607e
日期:——
A rhodium(I)-catalyzed regioselective hydroacylation of alkenyl-bearing allylic alcohols with simple aldehydes for the preparation of diverse 1,5-diketones is described. Mechanistic investigation suggests that this transformation might proceed through redox isomerization of the allylic alcohol followed by hydroacylation of the resulting enone with aldehyde involving a stable six-membered rhodacycle
描述了一种铑 ( I ) 催化的带有烯基的烯丙醇与简单醛的区域选择性加氢酰化反应,用于制备不同的 1,5-二酮。机理研究表明,这种转化可能通过烯丙醇的氧化还原异构化,然后用醛将所得的烯酮加氢酰化,包括稳定的六元罗丹环中间体来进行。该协议强调了原位生成的羰基在控制分子内烯烃部分的位点选择性中的作用。