Stereoselective Palladium-Catalyzed 1,3-Arylboration of Unconjugated Dienes for Expedient Synthesis of 1,3-Disubstituted Cyclohexanes
作者:Hailiang Pang、Dong Wu、Hengjiang Cong、Guoyin Yin
DOI:10.1021/acscatal.9b02747
日期:2019.9.6
As significant pharmacophores, 1,3-disubstituted cyclohexanes are widespread in natural products and synthetic bioactive molecules. In this work, we describe a palladium-catalyzed arylboration of 1,4-cyclohexadienes, which allows expeditious access to an array of functionalized 1,3-disubstituted cyclohexanes from the readily available starting materials. Palladium catalysis enables the arylboration
作为重要的药效团,1,3-二取代的环己烷广泛存在于天然产物和合成的生物活性分子中。在这项工作中,我们描述了钯催化的1,4-环己二烯基的芳基硼酸酯化反应,该反应可从易于获得的起始原料中快速进入官能化的1,3-二取代的环己烷阵列。与较早的镍催化相比,钯催化可使芳基硼化反应以逆的区域选择性进行。该方案最引人注目的功能是1,3-区域选择性和排他性顺式-非对映选择性。有趣的是,这种三组分反应的成功并不依赖于配体配体的应用,而是依赖于廉价的氯化铵盐。一系列下游的立体定向转化和药物分子合成突显了该方法的合成效用。