Synthesis of Fused Indoline‐Cyclobutanone Derivatives via an Intramolecular [2+2] Cycloaddition
作者:Rifahath M. Neyyappadath、Mark D. Greenhalgh、David B. Cordes、Alexandra M. Z. Slawin、Andrew D. Smith
DOI:10.1002/ejoc.201900326
日期:2019.9
We thank the EPSRC Centre for Doctoral Training in Critical Resource Catalysis (CRITICAT, grant code EP/L016419/1, R.M.N.) for funding. We thank the European Research Council under the European Union’s Seventh Framework Programme (FP7/2007–2013) ERC grant agreement no. 279850 (A.D.S.). A.D.S. thanks the Royal Society for a Wolfson Research Merit Award. We also thank the EPSRC UK National Mass Spectrometry
The synthesis of N-heterocycles via copper/TEMPO catalysed aerobic oxidation of amino alcohols
作者:James C. A. Flanagan、Laura M. Dornan、Mark G. McLaughlin、Niall G. McCreanor、Matthew J. Cook、Mark J. Muldoon
DOI:10.1039/c2gc35062a
日期:——
N-Heterocycles can be prepared using alcohol oxidation as a key synthetic step. Herein we report studies exploring the potential of Cu/TEMPO as an aerobic oxidation catalyst for the synthesis of substituted indoles and quinolines.
Oxidative Cyclization of Amino Alcohols Catalyzed by a Cp*Ir Complex. Synthesis of Indoles, 1,2,3,4-Tetrahydroquinolines, and 2,3,4,5-Tetrahydro-1-benzazepine
oxidative cyclization of amino alcohols has been revealed. Indole derivatives are synthesized in good to excellent yields from2-aminophenethylalcohols by means of a [CpIrCl(2)](2)/K(2)CO(3) catalytic system. The present catalytic system is also effective for syntheses of 1,2,3,4-tetrahydroquinolines from 3-(2-aminophenyl)propanols and 2,3,4,5-tetrahydro-1-benzazepine from 4-(2-aminophenyl)butanol.
A sustainable strategic approach for N-alkylation of amines with activation of alcohols triggered via a hydrogen auto-transfer reaction using a Pd(ii) complex: evidence for metal–ligand cooperativity
new well-defined, air-stable, phosphine free palladium(II) [Pd(L)Cl] (1) catalyst. This catalyst was utilized for N-alkylation of amines and indole synthesis where H2O was found to be the by-product. A broad range of aromaticamines were alkylated using this homogeneous catalyst with a catalyst loading of 0.1 mol%. Greener aromatic and aliphatic primary alcohols were utilized and a hydrogen auto-transfer
这项工作描述了一种新的结构明确、空气稳定、不含磷的钯( II )[Pd( L )Cl]( 1 )催化剂。该催化剂用于胺的N-烷基化和吲哚合成,其中发现 H 2 O 是副产物。使用这种催化剂负载量为 0.1 mol% 的均相催化剂对多种芳香胺进行烷基化。使用更环保的芳香族和脂肪族伯醇,并研究了通过金属-配体合作方法的氢自动转移策略。含抗组胺药分子三苯胺的前体以克级合成,以实现当前合成方法的大规模应用。进行了许多对照实验来研究可能的反应途径,这些实验的结果表明偶氮发色团在催化循环期间作为氢储存库。
[Cp*IrCl<sub>2</sub>]<sub>2</sub>-Catalyzed Indirect Functionalization of Alcohols: Novel Strategies for the Synthesis of Substituted Indoles
We report novel iridium(III)-catalyzed reactions that afford substituted indoles via the indirect functionalization of alcohols via C-3 selective alkylation of indoles with alcohols and a one-pot cascade strategy from amino- or nitro-phenyl ethyl alcohols, which incorporates oxidative cyclization and C-3 alkylation.