Transition‐Metal‐Free DMAP‐Mediated Aromatic Esterification of Amides with Organoboronic Acids
作者:Tao Wang、Yanqing Wang、Kai Xu、Yuheng Zhang、Jiarui Guo、Lantao Liu
DOI:10.1002/ejoc.202100478
日期:2021.6.14
A new, transition-metal-free, effective method for aromatic esterification of amides with organoboronic acids has been developed, leading to a wide range of benzoate derivatives with yields ranging from moderate to good. The catalytic reaction shows broad substrate scope and excellent functional group tolerance.
THE CHEMOSELECTIVE PREPARATION OF THE SUBSTITUTED PHENYL BENZOATES USING RE–Y ZEOLITE AS CATALYST
作者:Yixiang Ding、Rui Wu、Qiang Lin
DOI:10.1081/scc-120005422
日期:2002.1.1
ABSTRACT A practical and chemoselective method for the synthesis of substituted phenyl benzoates using rare earth zeolite as catalyst was described, its recycle procedure offers high total yield.
Photoinduced Specific Acylation of Phenolic Hydroxy Groups with Aldehydes
作者:Tairin Kawasaki、Naoki Ishida、Masahiro Murakami
DOI:10.1002/anie.202008897
日期:2020.10.5
specifically acylate phenolic hydroxyl groups through a radical pathway. When a mixture of an aldehyde and a phenol in ethyl acetate is irradiated with blue light in the presence of iridium and nickel bromide catalysts at ambient temperature, phenoxyl and acyl radicals are transiently generated in situ and cross‐couple to furnish an ester. Aliphatic hydroxygroups remain untouched under the reaction conditions
Rhodium-catalyzed synthesis of esters from aryl iodides and alcohols: use of alcohols with/without the assistance of aldehydes as carbon monoxide and nucleophile sources
作者:Ju Hyun Kim、Hawon Park、Young Keun Chung
DOI:10.1039/c6ra25723b
日期:——
A CO-gas-free rhodium-catalyzed alkoxycarbonylation of aryl iodide with alcohols has been developed. Alcohols, with/without the aid of an aldehyde, were used as a carbon monoxide and nucleophile source. The former synthesis afforded better yields of the alkoxycarbonylated products. Moreover, phenols also afforded phenoxycarbonylation products with high yields.
Nickel-Catalyzed Reductive Coupling of Aryl Bromides with Tertiary Alkyl Halides
作者:Xuan Wang、Shulin Wang、Weichao Xue、Hegui Gong
DOI:10.1021/jacs.5b06255
日期:2015.9.16
A mild Ni-catalyzed reductive arylation of tertiaryalkylhalides with aryl bromides has been developed that delivers products bearing all-carbon quaternary centers in moderate to excellent yields with excellent functional group tolerance. Electron-deficient arenes are generally more effective in inhibiting alkyl isomerization. The reactions proceed successfully with pyridine or 4-(dimethylamino)pyridine
已经开发出一种温和的 Ni 催化的叔烷基卤化物与芳基溴化物的还原芳基化反应,以中等至优异的收率和优异的官能团耐受性提供带有全碳季铵中心的产品。缺电子芳烃通常更有效地抑制烷基异构化。该反应与吡啶或 4-(二甲氨基)吡啶一起成功进行,而咪唑鎓盐略微提高了偶联效率。