An efficient and simple palladium-catalyzed approach for the synthesis of aryl ketones from low-cost nitriles and arylhydrazines using molecular oxygen (O2) as sole oxidant via C–N bond cleavage is reported. Various aryl ketones were synthesized in moderate to good yields under mild conditions. A possible mechanism involving the PdII/Pd0 catalytic cycle process is depicted, and a cationic palladium
据报道,一种有效且简单的钯催化方法可通过低成本的腈和芳肼,使用分子氧(O 2)作为唯一氧化剂通过C–N键断裂来合成芳基酮。在温和的条件下以中等至良好的产率合成了各种芳基酮。描述了涉及Pd II / Pd 0催化循环过程的可能机理,并通过ESI-MS检测了阳离子钯中间体。
Pd(II)-Catalyzed Denitrogenative and Desulfinative Addition of Arylsulfonyl Hydrazides with Nitriles
denitrogenative and desulfinative addition of arylsulfonyl hydrazides with nitriles has been successfully achieved under mild conditions. This transformation is a new method for the addition reaction to nitriles with arylsulfonyl hydrazides as arylating agent, thus providing an alternative synthesis of aryl ketones. The reported addition reaction is tolerant to many common functional groups, and works
Photo-induced oxidative cleavage of C–C double bonds for the synthesis of biaryl methanone <i>via</i> CeCl<sub>3</sub> catalysis
作者:Pan Xie、Cheng Xue、Dongdong Du、SanShan Shi
DOI:10.1039/d1ob01002f
日期:——
A synergistic Ce/ROH catalytic mechanism is also proposed based on the experimental observations. This protocol should be the first successful Ce-catalyzed photooxidation reaction of olefins with air as the oxidant, which would provide inspiration for the development of novel Ce-catalyzed photochemical synthesis processes.
开发了一种 Ce 催化的策略,通过在室温下光氧化裂解 C-C 双键来生产联芳基甲酮。该反应在空气下进行,表现出高活性和官能团耐受性。基于实验观察,还提出了协同的 Ce/ROH 催化机制。该协议应该是第一个成功的 Ce 催化烯烃以空气为氧化剂的光氧化反应,这将为开发新型 Ce 催化光化学合成工艺提供灵感。
Palladium/Copper-Catalyzed Oxidative Coupling of Arylboronic Acids with Isocyanides: Selective Routes to Amides and Diaryl Ketones
An efficient and alternative oxidative cross-coupling strategy startingfromarylboronicacids and isocyanides for the selective synthesis of amides and diaryl ketones with palladium/copper catalysis is developed. Various substituted benzamides and benzophenones could be obtained in good yields. The reaction represents an efficient and alternative strategy for the synthesis of carbonyl compounds.
The carbonyl compounds, synthesized by the oxidative cleavage of their corresponding olefins, are of great significance in organic synthesis, especially aryl ketones. We have developed a gentle and effective protocol, using acid red 94 as the organic metal-free photocatalyst, O2 as the oxidant, and water as the solvent. Under visible light irradiation, aryl ketone derivatives were obtained in moderate