Organocatalytic Diboration Involving “Reductive Addition” of a Boron–Boron σ-Bond to 4,4′-Bipyridine
作者:Toshimichi Ohmura、Yohei Morimasa、Michinori Suginome
DOI:10.1021/jacs.5b00546
日期:2015.3.4
A 4,4'-bipyridine-based catalyst system for diboration of pyrazine derivatives was established. The catalyst cycle consists of the following two steps: (1) reductive addition of the boron-boron bond of bis(pinacolato)diboron to 4,4'-bipyridine to form N,N'-diboryl-4,4'-bipyridinylidene and (2) oxidative boryl transfer from the intermediate to pyrazine to give N,N'-diboryl-1,4-dihydropyrazine with regeneration
建立了用于吡嗪衍生物二硼化的4,4'-联吡啶基催化剂体系。催化剂循环包括以下两个步骤:(1)双(频哪醇)二硼的硼-硼键还原加成到 4,4'-联吡啶形成 N,N'-二硼基-4,4'-联吡啶亚基和(2) 从中间体氧化硼基转移到吡嗪,得到 N,N'-二硼基-1,4-二氢吡嗪,再生 4,4'-联吡啶。