We present our investigations into the regioselective borylation and halogenation of polyoxygenated naphthalene systems that are key precursors to dimeric pyranonaphthoquinone natural products. A variety of oxygenated naphthalenes were successfully borylated with pinacolborane in high yield and excellent regioselectivity using [Ir(COD)OMe]2 and di-tert-butylbipyridine (dtbpy). The boronates were also
我们目前的研究是聚氧
萘系统的区域选择性
硼化和卤化反应,这是二聚
吡喃并
萘醌
天然产物的关键前体。使用[Ir(COD)OMe] 2和二叔丁基联
吡啶(dtbpy),成功地将多种氧化
萘与频哪
溴硼烷进行了高产率和极好的区域选择性的
硼化反应。
硼酸盐也很容易转变成相应的卤化物,为制备可用于
天然产物合成的高级铃木偶联底物开辟了新途径。