Green Hydroselenation of Aryl Alkynes: Divinyl Selenides as a Precursor of Resveratrol
作者:Gelson Perin、Angelita Barcellos、Eduardo Luz、Elton Borges、Raquel Jacob、Eder Lenardão、Luca Sancineto、Claudio Santi
DOI:10.3390/molecules22020327
日期:——
A simple and efficient protocol to prepare divinyl selenides has been developed by the regio- and stereoselective addition of sodium selenide species to aryl alkynes. The nucleophilic species was generates in situ, from the reaction of elemental selenium with NaBH₄, utilizing PEG-400 as the solvent. Several divinyl selenides were obtained in moderate to excellent yields with selectivity for the (Z
通过将硒化钠物质区域和立体选择性地加成到芳基炔烃上,已经开发了一种简单有效的制备二乙烯基硒化物的方案。亲核物质是利用PEG-400作为溶剂,从元素硒与NaBH 3的反应中原位产生的。通过一步步骤在60°C下在短时间内进行反应,以中等至极好的收率获得了几种二乙烯基硒化物,对(Z,Z)-异构体具有选择性。该方法扩展到碲,以良好的收率得到所需的二乙烯基碲化物。此外,双(3,5-二甲氧基苯乙烯基)硒化物3f与(4-甲氧基苯基)溴化镁5的铁催化的交叉偶联反应以57%的产率提供了白藜芦醇三甲醚6。