the assistance of appropriate directing groups, low-valent titanium was found to homolytically cleave non-strained C–O bonds. In particular, a newly designed catechol monoether directing group rendered a route toward the activation of non-benzylic C(sp3)–O bonds. This method has been applied to conventional radical addition reactions to alkenes.
醚 C-O 键是有机分子的典型组成部分,除非高度紧张,否则很少被视为反应性官能团。在适当的导向基团的帮助下,发现低价
钛可以均裂裂解非应变 C-O 键。特别是,新设计的
儿茶酚单醚导向基团提供了一条激活非苄型 C(sp 3 )–O 键的途径。该方法已应用于烯烃的常规自由基加成反应。