Regioselective Alkynylation and Alkenylation at the More Hindered C–B Bond of 1,2-Bis(Boronic) Esters
作者:Xi-Zhang Zou、Jian-Fei Ge、Yun-Xiao Yang、Yi-Fan Huang、De-Wei Gao
DOI:10.1021/acs.orglett.3c04301
日期:2024.3.1
effective synthetic methods stands in stark contrast to the large number of encumbered sites encountered in molecules of interest. Here, we demonstrate that 1,2-bis(boronates) undergo selective alkynylation and alkenylation at the more sterically hindered C–B bond. Our preliminary mechanistic studies disclosed that this reaction can proceed through two convergent pathways involving direct coupling of sterically
有机分子空间位阻较大的位点的选择性转化代表了精确修饰分子能力的前沿。缺乏有效的合成方法与目标分子中遇到的大量阻碍位点形成鲜明对比。在这里,我们证明 1,2-双(硼酸酯)在空间位阻更大的 C-B 键处发生选择性炔基化和烯基化。我们的初步机理研究表明,该反应可以通过两种收敛途径进行,涉及空间阻碍位点的直接偶联与 1,2-硼迁移偶联。值得注意的是,这种方法有助于方便地获得烯基和炔基硼产品,这些产品可以通过一系列转化来多样化。