has been achieved by using diisobutylaluminum hydride (DIBAL-H). Hydroalumination of the alkyne moiety with DIBAL-H triggers the aromatic cyclization, which usually proceeds without rearrangement and loss of the existing substituents. The related unusual cyclizations to different types of polysubstituted benzenes are also described.
通过使用氢化
二异丁基铝(D
IBAL-H),可以从甲
硅烷基化的1,3-二烯基-5炔基进行区域控制的多取代苯的合成。炔基部分与D
IBAL-H的加氢铝化反应会触发芳族环化反应,这种环化反应通常不会进行重排,也不会丢失现有的取代基。还描述了与不同类型的多取代苯相关的异常环化。