An oxyboration reaction that employs B–O σ bonds as addition partners to C–C π bonds to form borylated dihydrofurans and isochromenes has been developed. By nature of the mechanism, the reaction produces exclusively one borylated regioisomer, in contrast to and/or complementary to alternative routes that produce these borylated heterocycles via C–H activation. Access to the borylative heterocyclization
已经开发出一种氧
硼化反应,该反应使用B-Oσ键作为C-Cπ键的加成伙伴,从而形成
硼酸化的二氢
呋喃和异
色酮。根据机理的性质,该反应仅产生一种
硼化的区域异构体,与通过CH活化产生这些
硼化的杂环的替代途径相反和/或互补。直接从
醇类或从相应的酮开始,形成杂环核并在一个合成步骤中安装
硼的氢
硼化-氧
硼化序列证明了进入
硼化杂环的途径。
邻苯二酚硼酸酯可直接用作原位Suzuki交叉偶联反应中的偶联伴侣,而无需酯交换成
频哪醇硼酸酯。