Rhodium-catalyzed chelation-assisted activation of the β-C-H bond of α,β-unsaturated ketoximes and subsequent reaction with alkynes affords highly substituted pyridine derivatives. This new method provides an opportunity for the one-pot synthesis of pyridines with all five positions (C2-C6) substituted.
铑催化的螯合辅助活化α,β-不饱和酮
肟的β-C-H键,并与
炔烃进行后续反应,可以获得高度取代的
吡啶衍生物。这种新方法为一步合成所有五个位置(C2-C6)均被取代的
吡啶提供了机会。