Transition-Metal-Free Formal Decarboxylative Coupling of α-Oxocarboxylates with α-Bromoketones under Neutral Conditions: A Simple Access to 1,3-Diketones
作者:Zhen He、Xiaotian Qi、Shiqing Li、Yinsong Zhao、Ge Gao、Yu Lan、Yiwei Wu、Jingbo Lan、Jingsong You
DOI:10.1002/anie.201409361
日期:2015.1.12
A transition‐metal‐free formaldecarboxylativecoupling reaction between α‐oxocarboxylates and α‐bromoketones to synthesize 1,3‐diketone derivatives is presented. In this reaction, a broad scope of substrates can be employed, and neither a metal‐based reagent nor an additional base is required. DFT calculations reveal that this reaction proceeds through a coupling followed by decarboxylation mechanism
Decarboxylative acylation of <i>N</i>-free indoles enabled by a catalytic amount of copper catalyst and liquid-assisted grinding
作者:Jingbo Yu、Chao Zhang、Xinjie Yang、Weike Su
DOI:10.1039/c9ob00622b
日期:——
A facile decarboxylativeacylation of N-free indoles with α-ketonates via liquid-assisted grinding was reported. The reaction requires only a catalytic amount of Cu(OAc)2·H2O in combination with O2 as the terminal oxidant to give various 3-acylindoles with high efficiency. Additionally, this new methodology was applicable to a gram-scale synthesis.
Development of Decarboxylative Coupling Processes for the Synthesis of Azomethines and Ketones
作者:Florence Collet、Bingrui Song、Felix Rudolphi、Lukas J. Gooßen
DOI:10.1002/ejoc.201101103
日期:2011.11
redox-neutral decarboxylativecross-coupling reactions. Hydrogenation of the azomethine products leads to secondary amines. Alternatively, they can be hydrolyzed in situ to arylketones. The resulting ketonesynthesis via azomethine intermediates is also of interest as it gives higher yields at much lower temperatures than the direct decarboxylative coupling of α-oxo carboxylates with aryl halides.