Synthesis of Vinyl-, Allyl-, and 2-Boryl Allylboronates via a Highly Selective Copper-Catalyzed Borylation of Propargylic Alcohols
作者:Lujia Mao、Rüdiger Bertermann、Katharina Emmert、Kálmán J. Szabó、Todd B. Marder
DOI:10.1021/acs.orglett.7b03294
日期:2017.12.15
An efficient methodology for the synthesis of vinyl-, allyl-, and (E)-2-boryl allylboronates from propargylic alcohols via Cu-catalyzed borylation under mild conditions is reported. In the presence of commercially available Cu(OAc)2 or Cu(acac)2 and Xantphos, the reaction affords the desired products in up to 92% yield with a broad substrate scope (43 examples). Isolation of an allenyl boronate as
报道了在温和的条件下通过铜催化的硼化从炔丙醇合成乙烯基,烯丙基和(E)-2-硼基烯丙基硼酸酯的有效方法。在可商购的Cu(OAc)2或Cu(acac)2和Xantphos的存在下,该反应以高达92%的收率提供所需的产物,并具有广泛的底物范围(43个实例)。分离烯丙基硼酸酯作为反应中间体表明,插入-消除型反应,然后进行硼基杯化,参与了炔丙醇的硼酸酯化反应。