Sequential and One-Pot Reactions of Phenols with Bromoalkynes for the Synthesis of (<i>Z</i>)-2-Bromovinyl Phenyl Ethers and Benzo[<i>b</i>]furans
作者:Shihua Wang、Pinhua Li、Lin Yu、Lei Wang
DOI:10.1021/ol202383z
日期:2011.11.18
2-substituted benzo[b]furans in good yields through palladium-catalyzed direct C–H bond functionalizations. It is important to note that the transformation of phenols with bromoalkynes into benzo[b]furans could be carried out in one pot with a simple and efficient tandem procedure.
苯并[ b ]呋喃在一个锅中根据苯酚与溴炔烃的加成/钯催化的CH键结合官能化制备。苯酚与溴代炔烃的加成反应以高收率生成了具有优异区域和立体选择性的(Z)-2-溴乙烯基苯基醚。所获得的(Z)-2-溴乙烯基苯基醚随后通过分子内环化进行处理,通过钯催化的直接C–H键官能化,以高收率获得了2-取代的苯并[ b ]呋喃。重要的是要注意,可以将溴代炔烃将苯酚转化为苯并[ b ]呋喃,可以通过简单而有效的串联程序在一个罐中进行。