TBAF‐Catalyzed Tandem Synthesis of Triazolo[4,5‐
<i>c</i>
]quinolines at Ambient Temperature
作者:Nan Sun、Han Yang、Kai Zheng、Liqun Jin、Baoxiang Hu、Zhenlu Shen、Xinquan Hu
DOI:10.1002/ejoc.202001280
日期:2020.11.22
1H‐[1,2,3]triazolo[4,5‐c]quinolines have been developed based on tandem TBAF‐catalyzed intermolecular azide‐alkyne [3+2] cycloaddition of β‐(2‐aminoaryl)‐α,β‐ynones and TMS‐N3, followed by intramolecular dehydration annulation reaction. This transformation can smoothly proceed at ambient temperature to provide a broad range of functionalized 1H‐[1,2,3]triazolo[4,5‐c]quinolines in up to 95 % yield in
基于串联TBAF催化的分子间叠氮化物-炔烃[3 + 2]环加β-(),开发了一种高效且无金属的1 H- [1,2,3]三唑并[4,5- c ]喹啉。 2-氨基芳基)-α,β-炔酮和TMS-N 3,然后进行分子内脱水环化反应。这种转化可以在环境温度下平稳地进行,以提供32个实例中高达95%的收率的多种功能化1 H- [1,2,3]三唑[4,5- c ]喹啉。
Copper-Catalyzed Multicomponent Domino Reaction of 2-Bromobenzaldehydes, Aryl Methyl Ketones, and Sodium Azide: Access to 1<i>H</i>-[1,2,3]Triazolo[4,5-<i>c</i>]quinoline Derivatives
A practical copper-catalyzed multicomponent reaction has been developed for the synthesis of 1H-[1,2,3]triazolo[4,5-c]quinoline derivatives from commercially available 2-bromobenzaldehydes, aryl methyl ketones, and sodium azide. This protocol integrated consecutive base-promoted condensation, [3 + 2] cycloaddition, copper-catalyzed SNAr, and denitrogenation cyclization sequences. Preliminary mechanistic
已经开发了一种实用的铜催化多组分反应,用于从可商购的2-溴苯甲醛,芳基甲基酮和叠氮化钠合成1 H- [1,2,3]三唑并[4,5- c ]喹啉衍生物。该协议集成了连续的碱促进的缩合,[3 + 2]环加成,铜催化的S N Ar和脱氮环化序列。初步的机理研究表明,CuBr 2充当多功能催化剂以简化该多米诺骨牌工艺。温和的催化体系使一次操作即可有效构建一个C–C和四个C–N键。