Synthesis of Biaryls and Aryl Ketones<i>via</i>Microwave-Assisted Decarboxylative Cross-Couplings
作者:Lukas J. Gooßen、Bettina Zimmermann、Christophe Linder、Nuria Rodríguez、Paul P. Lange、Jens Hartung
DOI:10.1002/adsc.200900337
日期:2009.11
A protocol for the microwave-assisted decarboxylative cross-couplings of carboxylic acid salts with aryl halides has been developed that allows the synthesis of various biaryls and aryl ketones in high yields. After careful adaptation of the bimetallic catalyst system and reaction conditions, these mechanistically complex transformations can now be performed within only five minutes in concentrated
Synthesis of 6-acyl phenanthridines by oxidative radical decarboxylation–cyclization of α-oxocarboxylates and isocyanides
作者:Jie Liu、Chao Fan、Hongyu Yin、Chu Qin、Guoting Zhang、Xu Zhang、Hong Yi、Aiwen Lei
DOI:10.1039/c3cc49026b
日期:——
A silver catalysed synthesis of 6-acyl phenanthridines by oxidative radical decarboxylation–cyclization of α-oxocarboxylates and isocyanides was developed.
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.