Cross-Coupling Synthesis of Methylallyl Alkenes: Scope Extension and Mechanistic Study
作者:Clémence Tabélé、Christophe Curti、Youssef Kabri、Nicolas Primas、Patrice Vanelle
DOI:10.3390/molecules201219886
日期:——
Cross-coupling reactions between 2-methyl-2-propen-1-ol and various boronic acids are used to obtain aromatic-(2-methylallyl) derivatives. However, deboronation or isomerization side reactions may occur for several boronic acids. We describe herein the synthesis of original alkenes with good yields under mild reaction conditions that decrease these side reactions. The scope of this environmentally benign reaction is thereby extended to a wide variety of boronic acids. A mechanistic study was conducted and suggested a plausible catalytic cycle mechanism, pointing to the importance of the Lewis acidity of the boronic acid used.
2-甲基-2-丙烯-1-醇与多种硼酸之间的交叉耦合反应可用于制备芳香性(2-甲基烯丙基)衍生物。然而,某些硼酸可能会发生去硼化或异构化副反应。本文描述了在温和反应条件下,通过降低这些副反应,合成产率良好的原始烯烃的方法。因此,这种环境友好的反应的范围得到了扩展,可涵盖更多种类的硼酸。我们对反应机理进行了研究,并提出了一种可能的催化循环机制,指出了所使用硼酸的Lewis酸性的重要性。