Nickel-Catalyzed Coupling of Alkenes, Aldehydes, and Silyl Triflates
作者:Sze-Sze Ng、Chun-Yu Ho、Timothy F. Jamison
DOI:10.1021/ja062866w
日期:2006.9.1
two recently developed nickel-catalyzed coupling reactions of alkenes, aldehydes, and silyl triflates is presented. These reactions provide either allylic alcohol or homoallylic alcohol derivatives selectively, depending on the ligand employed. These processes are believed to be mechanistically distinct from Lewisacid-catalyzed carbonyl-ene reactions, and several lines of evidence supporting this hypothesis
Simple Alkenes as Substitutes for Organometallic Reagents: Nickel-Catalyzed, Intermolecular Coupling of Aldehydes, Silyl Triflates, and Alpha Olefins
作者:Sze-Sze Ng、Timothy F. Jamison
DOI:10.1021/ja055363j
日期:2005.10.1
A nickel-catalyzed method for the three-componentcoupling of alkenes (ethylene and alpha olefins), aldehydes, and silyl triflates is described, and this process represents the first catalytic method for coupling aldehydes and alkenes to give allylic alcohol derivatives. Conceptually, the alkene functions as a replacement for an alkenylmetal reagent.
Regio- and diastereoselective synthesis of unsymmetrical 1,4-diketone-derived (<i>Z</i>)-monosilyl enol ethers <i>via</i> siloxyallylpotassium intermediates
作者:Shuto Okuda、Yutaka Narita、Rikuo Hayashi、Masahiro Sai
DOI:10.1039/d2cc07097a
日期:——
regio- and diastereoselectivesynthesis of unsymmetrical 1,4-diketone-derived (Z)-monosilyl enol ethers from 1-arylallyloxysilanes and Weinreb amides using (trimethylsilyl)methylpotassium as a base. The metalation of 1-arylallyloxysilanes to generate siloxyallylpotassiums is the key step in this transformation. The products can be transformed into diverse α-monofunctionalized unsymmetrical 1,4-diketones
本文描述了使用(三甲基甲硅烷基)甲基钾作为碱,从 1-芳基烯丙氧基硅烷和 Weinreb 酰胺中区域和非对映选择性合成不对称的 1,4-二酮衍生的 ( Z )-单甲硅烷基烯醇醚。1-芳基烯丙氧基硅烷金属化生成甲硅烷氧基烯丙基钾是这一转变的关键步骤。产品可以转化为多种 α-单官能化不对称 1,4-二酮。