Gold(I)-catalysed addition of alcohols to 3,3-disubstituted cyclopropenes occurs in a highly regioselective and facile manner to produce alkyl tert-allylic ethers in good yields. The reaction is tolerant of sterically hindered substituents on the cyclopropene as well as primary and secondary alcohols as nucleophiles. In this full article, we report on the substrate scope and plausible mechanism, as well as the regioselectivity issues arising from subsequent gold(I)-catalysed isomerisation of tertiary to primary allylic ethers.
金(I)催化醇与3,3-二取代环
丙烯的加成以高度区域选择性和简便的方式进行,良好产率生成烷基叔醇醚。该反应对环
丙烯上的立体位阻取代基以及作为亲核试剂的一级和二级醇具有良好的耐受性。在这篇全文中,我们报告了底物范围和合理的机制,以及由于随后的
金(I)催化三级到一级
烯丙醚异构化引起的区域选择性问题。