Direct One‐Pot Reductive N‐Alkylation of Nitroarenes by using Alcohols with Supported Gold Catalysts
作者:Chun‐Hong Tang、Lin He、Yong‐Mei Liu、Yong Cao、He‐Yong He、Kang‐Nian Fan
DOI:10.1002/chem.201100393
日期:2011.6.20
Gold standard support! The directreductive mono‐ or di‐N‐alkylation of aromatic nitro compounds with alcohols, using a hydrogen‐borrowing strategy, was efficiently promoted by a ligand‐free titania‐supportedgoldcatalyst system (see scheme). A variety of nitroarenes were selectively converted into the corresponding secondary or tertiary amines in good to excellent yields without any co‐catalysts
Herein, we demonstrated an efficient protocol for reductivealkylation of azides/nitro compounds via a borrowing hydrogen (BH) method. By following this protocol, selective mono- and dialkylated amines were obtained under mild and solvent-free conditions. A series of control experiments and deuterium-labeling experiments were performed to understand this catalytic process. Mechanistic studies suggested
Fe2O3-supported nano-gold catalyzed one-pot synthesis of N-alkylated anilines from nitroarenes and alcohols
作者:Qiling Peng、Yan Zhang、Feng Shi、Youquan Deng
DOI:10.1039/c1cc11057h
日期:——
Here, we show the one-step synthesis of N-alkylated anilines from nitrobenzenes and alcohols catalyzed by nano-gold catalyst. The yields to N-alkylated anilines were ∼90% under mild conditions. The mechanism of this reaction was explored. It shows promise for clean and simple synthesis of N-alkylated anilines.
Concise synthesis of aromatic tertiary amines via a double Petasis–borono Mannich reaction of aromatic amines, formaldehyde, and organoboronic acids
作者:Jiayi Wang、Pinzhen Li、Qiaoying Shen、Gonghua Song
DOI:10.1016/j.tetlet.2014.03.131
日期:2014.7
A simple and efficient strategy to construct aromatictertiary amines via a double Petasis–borono Mannich reaction of aromatic amines, formaldehyde, and organoboronic acids has been developed. The transformation provides a useful method for the synthesis of amine derivatives.
Regioselective Synthesis of 2° Amides Using Visible-Light-Induced Photoredox-Catalyzed Nonaqueous Oxidative C–N Cleavage of <i>N</i>,<i>N</i>-Dibenzylanilines
protocol on 2-(dibenzylamino)benzamide to afford quinazolinones with (NH4)2S2O8 as an additive. Mechanistic studies imply that the reaction might undergo in situ generation of α-amino radical to imine by C–N bond cleavage followed by the addition of superoxide ion to form amides.
据报道,可见光驱动的光氧化还原催化的N , N -二苄基苯胺的非水氧化 C-N 裂解为 2° 酰胺。此外,我们已将此协议应用于 2-(二苄基氨基) 苯甲酰胺以提供具有 (NH 4 ) 2 S 2 O 8作为添加剂的喹唑啉酮。机理研究表明,该反应可能通过 C-N 键断裂,然后加入超氧离子形成酰胺,原位生成 α-氨基自由基为亚胺。