Generation of 3-borylbenzynes, their regioselective Diels–Alder reactions, and theoretical analysis
作者:Akira Takagi、Takashi Ikawa、Yurio Kurita、Kozumo Saito、Kenji Azechi、Masahiro Egi、Yuji Itoh、Hiroaki Tokiwa、Yasuyuki Kita、Shuji Akai
DOI:10.1016/j.tet.2013.03.016
日期:2013.5
3-Borylbenzynes were generated in situ from 6-boryl-2-iodophenyl trifluoromethanesulfonates using i-PrMgCl·LiCl and applied to Diels–Alder reactions with substituted furans and pyrroles. The reactions allowed good functional group compatibility and produced the cycloadducts in high yields with high distal selectivities. Effective conversion of the boryl group of the products was achieved. A series
使用i -PrMgCl·LiCl从6硼基-2-碘苯基三氟甲烷磺酸盐中原位生成3-Borylbenzynes,并与取代的呋喃和吡咯一起用于Diels-Alder反应。反应允许良好的官能团相容性,并以高产率和高远端选择性产生环加合物。实现了产物的硼烷基的有效转化。这些反应中的一系列反应为生产多官能化的苯并稠合的芳族化合物提供了一种新方法。此外,通过DFT计算对这些Diels-Alder反应的区域选择性进行了理论分析,发现该反应主要受静电效应和由硼基引起的芳烃畸变的控制。