Nickel-catalysed chemoselective C-3 alkylation of indoles with alcohols through a borrowing hydrogen method
作者:Amreen K. Bains、Ayanangshu Biswas、Debashis Adhikari
DOI:10.1039/d0cc07169b
日期:——
A nickel catalysed chemoselective C3-alkylation of indole is reported that follows a borrowing hydrogen method promoted by a radical.
一种镍催化的化学选择性C3-吲哚烷基化反应报道了,该反应遵循了由自由基促进的借氢方法。
Iron-Catalyzed Direct C3-Benzylation of Indoles with Benzyl Alcohols through Borrowing Hydrogen
作者:Giovanni Di Gregorio、Michele Mari、Francesca Bartoccini、Giovanni Piersanti
DOI:10.1021/acs.joc.7b01603
日期:2017.8.18
We present the coupling of primary and secondary benzylalcohols with indoles to form 3-benzylated indoles and H2O that is catalyzed, for the first time, by a complex of earth-abundant iron. This transformation accommodates a variety of substrates and is distinguished by its operational simplicity, sustainability, high functional-group tolerance, and amenability to gram-scale synthesis. On the basis
General and Selective C-3 Alkylation of Indoles with Primary Alcohols by a Reusable Pt Nanocluster Catalyst
作者:S. M. A. Hakim Siddiki、Kenichi Kon、Ken-ichi Shimizu
DOI:10.1002/chem.201302464
日期:2013.10.18
The platinum rule: Heterogeneous, additive‐free C‐3 selectivealkylation of indoles by aliphatic and aromatic alcohols proceeded under transfer hydrogenation conditions with the reusablePt/θ‐Al2O3 catalyst (see scheme; TON=turnover number).
铂规则:异构,通过转移氢化的条件下进行与可重复使用的Pt /θ-Al系的脂肪族和芳族醇吲哚不含添加剂的C-3选择性烷基化2 ö 3催化剂(参见方案; TON =周转数)。
Nickel-catalyzed C3-alkylation of indoles with alcohols <i>via</i> a borrowing hydrogen strategy
作者:Miao Hu、Yong Jiang、Nan Sun、Baoxiang Hu、Zhenlu Shen、Xinquan Hu、Liqun Jin
DOI:10.1039/d1nj01581h
日期:——
An efficient Ni-catalyzed C3-alkylation of indoles with alcohols via a borrowing hydrogen pathway was achieved utilizing an N,O-donor coordinated nickel complex as the precatalyst.
A highly efficient route to C-3 alkyl-substituted indoles via completely metal-free catalytic transfer hydrogenation of 3-indolemethanols was developed. This process proceeds via vinylogous iminium intermediates formed in situ in the presence of Brønsted acids, and Hantzsch ester is used as the reductant. The reduction works extremely well with a large substrate scope, and the yields exceed 90% in