Metal‐Free Temperature‐Controlled Regiodivergent Borylative Cyclizations of Enynes: BCl
<sub>3</sub>
‐Promoted Skeletal Rearrangement
作者:Ana Milián、Manuel A. Fernández‐Rodríguez、Estíbaliz Merino、Juan J. Vaquero、Patricia García‐García
DOI:10.1002/anie.202205651
日期:2022.7.11
Metal-free borylative cyclization reactions of 1,3,5-trien-7-ynes provide straightforward access to polycyclic borylated building blocks. Depending on the temperature, either phenanthrenes (at 60 °C) or phenanthrene-fused cyclobutanes (at 0 °C) can be obtained selectively. The reaction at 60 °C proceeds through an unusual skeletal rearrangement unprecedented in BCl3-promoted cyclizations.
1,3,5-trien-7-ynes 的无金属硼化环化反应提供了对多环硼化结构单元的直接访问。根据温度,可以选择性地获得菲(60°C)或菲稠合环丁烷(0°C)。60°C 的反应通过 BCl 3促进的环化中前所未有的不寻常的骨架重排进行。