Ligand-Promoted, Copper Nanoparticles Catalyzed Oxidation of Propargylic Alcohols with TBHP or Air as Oxidant
作者:Xiaoquan Yao、Chengyan Han、Min Yu、Weijiang Sun
DOI:10.1055/s-0030-1261227
日期:2011.10
A highly efficient oxidation of propargylicalcohols to ynones was catalyzed by copper nanoparticles (Cu Nps) with TBHP as an oxidant at room temperature. With bipyridine as the ligand, the reaction was accelerated significantly and led in good to excellent yields to a variety of propargylicalcohols. Furthermore, with Cu Nps as the catalyst, molecular oxygen in air could be utilized as oxidant effectively
PROCESS FOR PRODUCING ALDEHYDES OR KETONES BY OXIDIZING ALCOHOLS WITH OXYGEN
申请人:Ma Shengming
公开号:US20120220792A1
公开(公告)日:2012-08-30
Provided is a process for producing aldehydes or ketones by oxidizing alcohols with oxygen, which comprises oxidizing alcohols to aldehydes or ketones in an organic solvent at room temperature with oxygen or air as an oxidant, wherein ferric nitrate (Fe(NO3)3.9H2O), 2,2,6,6-tetramethylpiperidine N-oxyl (TEMPO) and an inorganic chloride are used as catalysts, the reaction time is 1-24 hours, and the molar ratio of said alcohols, 2,2,6,6-tetramethylpiperidine N-oxyl and the inorganic chloride is 100:1˜10:1˜10:1˜10. The present process has the advantages of high yield, mild reaction conditions, simple operation, convenient separation and purification, recoverable solvents, substrates used therefor being various and no pollution, and therefore it is adaptable to industrialization.
Pd-Catalyzed Copper-Free Carbonylative Sonogashira Reaction of Aryl Iodides with Alkynes for the Synthesis of Alkynyl Ketones and Flavones by Using Water as a Solvent
作者:Bo Liang、Mengwei Huang、Zejin You、Zhengchang Xiong、Kui Lu、Reza Fathi、Jiahua Chen、Zhen Yang
DOI:10.1021/jo050498t
日期:2005.7.1
Pd-catalyzed copper-free carbonylative Sonogashira coupling reaction to synthesize alkynyl ketones from terminal alkynes and aryl iodides was achieved by using water as a solvent. The reaction was carried out at room temperature under balloon pressure of CO with Et3N as a base. The developed method was successfully applied to the synthesis of flavones.
Silacarboxylic Acids as Efficient Carbon Monoxide Releasing Molecules: Synthesis and Application in Palladium-Catalyzed Carbonylation Reactions
作者:Stig D. Friis、Rolf H. Taaning、Anders T. Lindhardt、Troels Skrydstrup
DOI:10.1021/ja208652n
日期:2011.11.16
Silacarboxylic acids have been demonstrated to be easy to handle, air-stable carbonmonoxide precursors. Different silacarboxylic acids were synthesized from the corresponding chlorosilanes and carbon dioxide, and their decarbonylation, upon treatment with an array of activators, was evaluated. The release of CO from crystalline MePh(2)SiCO(2)H proved to be highly efficient, and it was successfully
硅羧酸已被证明是易于处理、空气稳定的一氧化碳前体。从相应的氯硅烷和二氧化碳合成了不同的硅羧酸,并评估了它们在用一系列活化剂处理后的脱羰。从结晶 MePh(2)SiCO(2)H 中释放 CO 被证明是高效的,并且它成功地应用于使用接近化学计量数量的一氧化碳前体的钯催化羰基化偶联的选择。最后,证明了 MePh(2)Si(13)CO(2)H 的合成及其在两种生物活性化合物的羰基标记中的应用。
A novel stereoselective synthesis of conjugated dienones
作者:Dawei Ma、Yingrui Lin、Xiyan Lu、Yihua Yu
DOI:10.1016/0040-4039(88)85331-0
日期:1988.1
(E,E)-α,β,-γ,δ-Dienones are synthesized stereoselectively from the corresponding α,β-ynones in high yield under the catalysis of a ruthenium hydride complex.