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
Ag(<scp>i</scp>)/persulfate-catalyzed decarboxylative coupling of α-oxocarboxylates with organotrifluoroborates in water under room temperature
作者:Sheng Chang、Jian Feng Wang、Lin Lin Dong、Dan Wang、Bo Feng、Yuan Tai Shi
DOI:10.1039/c7ra10924e
日期:——
AgNO3 using K2S2O8 as oxidant to generate diarylketone products in high yields. The method is novel, simple, safe and efficient. Both aryl substituted potassium α-oxocarboxylates and organotrifluoroborates proceeded smoothly in water under room temperature. The utilization of α-oxocarboxylates as acylatingagent presents some elements of interest.
α-氧代羧酸盐和有机三氟硼酸盐的脱羧偶联反应在催化AgNO 3的存在下使用K 2 S 2 O 8作为氧化剂顺利进行,从而以高收率生成二芳基酮产物。该方法新颖,简单,安全,高效。芳基取代的α-氧代羧酸钾和有机三氟硼酸在室温下均能顺利进行。α-氧代羧酸盐作为酰化剂的利用表现出一些令人感兴趣的元素。
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.