Phosphine‐Free Manganese(II)‐Catalyst Enables Acceptorless Dehydrogenative Coupling of Alcohols with Indoles
作者:Vinita Yadav、Ekambaram Balaraman、Santosh B. Mhaske
DOI:10.1002/adsc.202100621
日期:2021.9.21
molecularly defined NNN−Mn(II) pincer complex catalyzed acceptorless dehydrogenative coupling of alcohols with indoles is reported. A wide variety of symmetrical and unsymmetrical bis(indolyl)methane derivatives as well as some structurally important products such as Vibrindole A, Turbomycin B alkaloid, Antileukemic, and Anticancer agents were synthesized. Mechanistic studies illustrate the importance
本文报道了一种空气稳定的、分子定义的 NNN-Mn(II) 钳形复合物催化醇与吲哚的无受体脱氢偶联。合成了多种对称和非对称双(吲哚基)甲烷衍生物以及一些结构上重要的产品,如 Vibrindole A、Turbomycin B 生物碱、抗白血病和抗癌剂。机理研究说明了 NH 部分在配合物中的重要性以及金属-配体合作在催化过程中的关键作用。
Development of an imidazole salt catalytic system for the preparation of bis(indolyl)methanes and bis(naphthyl)methane
作者:Xu Wang、Courtney C. Aldrich
DOI:10.1371/journal.pone.0216008
日期:——
Imidazolium salts are shown to catalyze the rapid room temperature reaction of indoles or naphthol with aldehydes to provide bis(indolyl)methanes or bis(naphthol)methane in excellent yields and the reaction proceeds optimally in dichloromethane with no base additives. The reaction exhibits a broad substrate tolerance and occurs through nucleophilic activation of the indoles and naphthols through a
Pd-catalyzed C–H activation in water: synthesis of bis(indolyl)methanes from indoles and benzyl alcohols
作者:Hidemasa Hikawa、Yuusaku Yokoyama
DOI:10.1039/c2ra21887a
日期:——
A method for the synthesis of bis(indolyl)methanes via palladium-catalyzed domino reactions of indoles with benzyl alcohols was developed. This protocol involves C3-benzylation of indoles and benzylic C–H functionalization in water.
K<sub>2</sub>S<sub>2</sub>O<sub>8</sub>-glucose mediated oxidative coupling of alcohols with indoles for synthesis of bis(indolyl)methanes in water
作者:Harish K. Indurthi、Samarpita Das、Amita Kumari、Deepak K Sharma
DOI:10.1039/d2nj02525f
日期:——
in water at room temperature for synthesis of bis(indolyl)methanes (BIMs) from simple indoles and alcohols is reported. The key step involves the conversion of alcohols to their corresponding carbonyl compounds and subsequent condensation with indoles from in situ generated radicals. Also, the challenging aliphatic alcohols showed good performance in the synthesis of BIMs. We also carried out a detailed
报道了在室温下使用廉价的 K 2 S 2 O 8在水中从简单的吲哚和醇合成双(吲哚基)甲烷(BIM)。关键步骤涉及将醇转化为其相应的羰基化合物,然后与原位产生的自由基中的吲哚缩合。此外,具有挑战性的脂肪醇在 BIM 的合成中表现出良好的性能。我们还对机制进行了详细的探索。
LiO<i>t</i>Bu-promoted synthesis of bis(3-indolyl)methanes by the alkylation of indoles with alcohols under air
作者:Hai Yen Nguyen、Thu Hue Tran、Ha Nam Do、Dang Van Do、Quoc-Anh Ngo、Nguyen Quyet Tien、Truong Thi Thanh Nga、Hien Nguyen、Tran Quang Hung、Tuan Thanh Dang
DOI:10.1039/d3ra07115d
日期:——
Bis(3-indolyl)methanes (BIMs) are known for their important bioactivities, which include anti-cancer, anti-inflammatory, antibacterial, and antioxidant properties. In this study, we are disclosing a metal catalyst-free synthesis of BIMs in high yields via the alkylation reaction of indoles and alcohols in the presence of lithium tert-butoxide base. Notably, oxygen in air played an important role as