on the boron atom, thus stabilizing or not stabilizing the corresponding adjacent radical, it is possible to control the behavior of α-boronyl xanthates and construct a large variety of terminal or internal boronates in a modular fashion. The remarkable tolerance of polar groups and the ability to introduce quaternary centers are particularly noteworthy features of this process.
与
硼被sp3-杂化的
二乙醇胺基
硼酸酯[B(
DEA)]相比,
硼上具有空p轨道的品纳可乐
硼酸酯(Bpin)可以稳定相邻的碳原子团。通过将
频哪醇或
二乙醇胺部分交替地放置在
硼原子上,从而稳定或不稳定相应的相邻基团,可以控制α-
硼基黄原酸酯的行为,并以模块化的方式构建多种末端或内部的
硼酸酯。极性基团的显着耐受性和引入四元中心的能力在此过程中特别值得注意。