conversion of substituted 1,3-cyclohexanediones to the alkyl ethers of resorcinol using a Pd/C–ethylene system is reported. In these reactions, ethylene works as a hydrogen acceptor. The efficient synthesis of resveratrol was achieved using this protocol as a key step. In addition, the direct formation of substituted resorcinols was carried out by adding K2CO3 into the reaction media.
据报道,使用Pd / C-乙烯系统将取代的1,3-环己二酮转化为间苯二酚的烷基醚。在这些反应中,乙烯充当氢受体。使用该方案作为关键步骤,可实现白藜芦醇的有效合成。另外,通过向反应介质中加入K 2 CO 3来直接形成取代的间苯二酚。
Me<sub>2</sub>(CH<sub>2</sub>CH)SiCN: a bifunctional ethylene equivalent for Diels–Alder reaction based controllable tandem synthesis
作者:Wen-Biao Wu、Bo-Shuai Mu、Jin-Sheng Yu、Jian Zhou
DOI:10.1039/d2sc00147k
日期:——
equivalent for the Diels–Alder (DA) reaction. The use of this reagent enables the controllable synthesis of value-added cyclohexenyl ketones or 2-acyl cyclohexancarbonitrile derivatives through a five- or six-step tandem sequence based on a Wittig/cyanosilylation/DA reaction/retro-cyanosilylation/isomerization sequence that involves a temporary silicon-tethered intramolecular DA reaction.
双功能甲硅烷基试剂 Me 2 (CH 2 CH)SiCN 已被开发为用于 Diels-Alder (DA) 反应的新型乙烯等价物。该试剂的使用能够通过基于 Wittig/氰基硅烷基化/DA 反应/逆氰基硅烷基化/异构化序列的五步或六步串联序列可控合成增值的环己烯基酮或 2-酰基环己腈衍生物,其中包括临时的硅束缚分子内 DA 反应。