Palladium catalyzed alkylation of indole via aliphatic C–H bond activation of tertiary amine
作者:K. Ramachandiran、D. Muralidharan、P.T. Perumal
DOI:10.1016/j.tetlet.2011.04.110
日期:2011.7
Alkylation of indoles has been achieved via Pd-catalyzed aliphatic C–H bond activation of tertiaryamine coupling with indole followed by C–N bond cleavage and subsequent addition of indole. This method involves the migration of alkane chain from tertiaryamine to indole.
Regioselective C<sub>3</sub>Alkylation of Indoles for the Synthesis of Bis(indolyl)methanes and 3-Styryl Indoles
作者:Ruiqin Zhang、Renchao Ma、Rener Chen、Lei Wang、Yongmin Ma
DOI:10.1021/acs.joc.3c02551
日期:2024.2.2
Herein, we describe an efficient transition-metal-free regioselective C3alkylation of indoles for the synthesis of bis(indolyl)methanes and 3-styryl indoles. Nitrobenzene is employed as the oxidant to oxidize the alcohols in the presence of a strong base and the reaction avoids the use of transition metals such as Ru and Mn. The protocol provides a favorable route to access biologically active compounds
在此,我们描述了一种有效的、无过渡金属的吲哚区域选择性C 3烷基化反应,用于合成双(吲哚基)甲烷和3-苯乙烯基吲哚。采用硝基苯作为氧化剂,在强碱存在下氧化醇,该反应避免了过渡金属如Ru和Mn的使用。该方案提供了获取生物活性化合物(如芦丁、vibrindole A 和涡轮霉素 B)的有利途径。
Utilization of methanol and ethanol for 3,3′-bis(indolyl)methane synthesis through activation of peroxymonosulfate over a copper catalyst
作者:Arpita Devi、Mrinmoy Manash Bharali、Subir Biswas、Tonmoy J. Bora、Jayanta K. Nath、Seonghwan Lee、Young-Bin Park、Lakshi Saikia、Manash J. Baruah、Kusum K. Bania
DOI:10.1039/d3gc00440f
日期:——
Copper oxide–peroxymonosulfate is reported as a green catalyst for 3,3′-bis(indolyl)methane synthesis without the use of volatile acetaldehyde or formaldehyde.
Synthesis of Bis(indolyl)methanes through an Alkylation Reaction of Indoles with Sodium Alkoxides
作者:Bingwei Zhou、Xue Chen、Yunkui Liu、Hongwei Jin
DOI:10.1055/a-1668-9910
日期:2022.3
We describe an alkylation reaction of indoles with sodium alkoxides for the synthesis of bis(indolyl)methanes. 1-Tetralone proved to be an efficient hydrogen acceptor, thus avoiding the use of precious transition metals such as Ru and Ir. This reaction features transition-metal-free conditions, uses readily available starting materials, and can be conducted on a gram scale.