Synthesis of Functionalized Chromene and Chroman Derivatives via Cesium Carbonate Promoted Formal [4 + 2] Annulation of 2′-Hydroxychalcones with Allenoates
作者:Hossein Rouh、Yangxue Liu、Nandakumar Katakam、Lilian Pham、Yi-Long Zhu、Guigen Li
DOI:10.1021/acs.joc.8b02627
日期:2018.12.21
A new strategy has been established for the synthesis of functionalized chromene and chroman derivatives via a Cs2CO3-catalyzed domino addition of 2′-hydroxychalcone derivatives with allenoates, which can serve as a general avenue for the construction of multireplaced chromene derivatives. Chemoselectivity of this synthesis was found to depend on substituents on substrates. Good to excellent yields
已经建立了通过Cs 2 CO 3催化的2'-羟基查耳酮衍生物与烯丙酸酯的多米诺加成来合成官能化的色烯和苯并二氢吡喃衍生物的新策略,其可以用作构建多取代的色烯衍生物的一般途径。发现该合成的化学选择性取决于底物上的取代基。在简单和温和的条件下,在室温下获得了良好的优良收率。