Copper catalyzed five-component domino strategy for the synthesis of nicotinimidamides
作者:Yu Zhao、Li Li、Zitong Zhou、Man Chen、Weiguang Yang、Hui Luo
DOI:10.1039/d1ob00162k
日期:——
synthesized by a copper-catalyzed multicomponent domino reaction of oxime esters, terminal ynones, sulfonyl azides, aryl aldehydes and acetic ammonium. Its synthetic pathway involves the formation of a highly reactive N-sulfonyl acetylketenimine, characterized by high selectivity, combinations of potential nucleophiles and electrophiles, mild reaction conditions and a wide substrate scope, and is a rare
A rapid and environmentally friendly conversion of pyridine to imidazo[1,2-a]pyridines has been developed via copper-catalyzedaerobicdehydrogenativecyclization with ketone oxime esters.
CuCl2-catalyzed N O bond cleavage of oxime esters: Approach to imidazoheterocycles and furo[3,2-c]chromenyl fused imidazoles
作者:Santosh K. Gudimella、Amanpreet Kaur、Ram Kumar、Sampak Samanta
DOI:10.1016/j.tetlet.2020.152147
日期:2020.7
An articulate approach to a diverse set of imidazoheterocycles in good to high yields via a copper-catalyzed aza-annulation of several oxime esters with a group of 2-amino-azaarenes was developed. The above cyclization reaction probably proceeds via a single electron transfer process which embodies a new technique for creating two new CN bonds for imidazole ring synthesis. Gratifyingly, the implementation
通过用几种肟酯与一组2-氨基氮杂氮杂铜进行铜催化的氮杂环化反应,开发了一种以良好至高收率的多种咪唑杂环杂环的铰接方法。上述环化反应可能是通过单电子转移过程进行的,这体现了一种新技术,该技术为咪唑环合成生成两个新的C N键。令人欣慰的是,该化学方法的实施可以进一步扩展为通过连续的C N键形成,合成带有呋喃[3,2- c ]亚甲基部分的新型稠合咪唑,随后是C(sp 2)-H功能化/ 5-内切-乙氧基环化(CC和C在铜(II)作为π亲电Lewis酸催化剂的情况下,原位生成带有环状烯酮的稠合咪唑。