Versatile One-Pot Synthesis of Polysubstituted Cyclopent-2-enimines from α,β-Unsaturated Amides: Imino-Nazarov Reaction
作者:Ting Fan、Ao Wang、Jia-Qi Li、Jian-Liang Ye、Xiao Zheng、Pei-Qiang Huang
DOI:10.1002/anie.201805641
日期:2018.8.6
The imino‐Nazarov cyclization of the polysubstituted pentan‐1,4‐diene‐3‐imines was realized. To this aim, a one‐pot procedure involving reductive alkenyliminylation of α,β‐unsaturated secondary amides with potassium organotrifluoroborates, followed by acid‐catalyzed imino‐Nazarov cyclization of the polysubstituted pentan‐1,4‐diene‐3‐imine intermediates, was studied systematically. This mild, operationally
多取代的戊丹-1,4-二烯-3-亚胺的亚氨基-纳扎罗夫环化反应得以实现。为此,采用了一锅法,其中包括将α,β-不饱和仲酰胺与有机三氟硼酸钾进行还原性烯基亚氨基化,然后对多取代的戊丹-1,4-二烯-3-亚胺中间体进行酸催化的亚氨基-纳扎罗夫环化。有系统地研究。这种温和,操作简单,灵活且高产的方案有效地提供了多取代的戊丹-1,4-二烯-3-亚胺,环戊烯亚胺和α-氨基环戊烯酮,它们在有机合成中是有用的支架。通过密度泛函理论计算研究了多取代的戊丹-1,4-二烯-3-亚胺在C2位置的取代基效应。