作者:Stephan Amrein、Martin Bossart、Tomaso Vasella、Armido Studer
DOI:10.1021/jo000041d
日期:2000.7.1
diastereoselective radical 1,5 phenyl migration reactions from silicon in diarylsilyl ethers to various C-centered radicals to form the corresponding 3-phenylated alcohols are described. Functionalized aryl groups can also be transferred. The effect of the variation of the attacking radical on the aryl transfer reaction is discussed. Best results are obtained for the phenyl migration to nucleophilic secondary
描述了从二芳基甲硅烷基醚中的硅到各种以C为中心的自由基的高度非对映选择性自由基1,5-苯基迁移反应,以形成相应的3-苯基化醇。官能化的芳基也可以被转移。讨论了攻击基的变化对芳基转移反应的影响。对于苯基向亲核仲烷基的迁移,可获得最佳结果,其中获得了高收率(最高81%)和高选择性(最高95%ds)。讨论了该过程的机理,并提出了解释反应的立体化学结果的模型。最后,提出了一种从Si到C的立体选择性1,4芳基迁移反应,包括一种新的酯α-芳基化方法。