61566-34-5Relevant articles and documents
Synthesis and evaluation of stable, efficient, and recyclable carbonylation catalysts: Polyether-substituted lmidazolium carbonyl cobalt lonic liquids
Lv, Zhiguo,Jiang, Yongfei,Zhou, Chao,Guo, Zhenmei,Ma, Xiuling,Chen, Qiang,Nie, Tao,Song, Hongbing
, p. 89 - 95 (2016)
The synthesis and catalytic performance of stable, efficient, and recyclable multi-functionalized ionic liquid catalysts are reported for the first time. Through an optimized synthetic strategy, a series of polyether-substituted imidazolium cobalt tetracarbonyl salts, [H(OCH2CH2)nbim] [Co(CO)4)] (n = 8, 15, and 22, bim = butylimidazolium), and their intermediates, were successfully synthesized and characterized by IR, UV-vis, 1H NMR, 13C NMR, and TGA. The stability, solubility, and critical solution temperature of the ionic liquids were also determined. A thermoregulated phase-separation catalysis system for the hydroesterification of olefins has been established based on the above multi-functionalized ionic liquid catalyst. The results show that this catalysis system has a high recycling efficiency, and provides a potential method for an environmentally benign carbonylation process.
Room-temperature Pd-catalyzed methoxycarbonylation of terminal alkynes with high branched selectivity enabled by bisphosphine-picolinamide ligand
Chen, Fen-Er,Ke, Miaolin,Liu, Ding,Ning, Yingtang,Ru, Tong
supporting information, p. 1041 - 1044 (2022/01/28)
We report the room-temperature Pd-catalyzed methoxy-carbonylation with high branched selectivity using a new class of bisphosphine-picolinamide ligands. Systematic optimization of ligand structures and reaction conditions revealed the significance of both
Green Esterification of Carboxylic Acids Promoted by tert-Butyl Nitrite
Cheng, Xionglve,Jiang, Gangzhong,Li, Xingxing,Tao, Suyan,Wan, Xiaobing,Zhao, Yanwei,Zheng, Yonggao
supporting information, p. 2713 - 2718 (2021/06/25)
In this work, the green esterification of carboxylic acids promoted by tert-butyl nitrite has been well developed. This transformation is compatible with a broad range of substrates and exhibits excellent functional group tolerance. Various drugs and substituted amino acids are applicable to this reaction under near neutral conditions, with good to excellent yields.
Palladium-Catalyzed Alkoxycarbonylation of sec-Benzylic Ethers
Beller, Matthias,Jackstell, Ralf,Maes, Bert U. W.,Schneider, Carolin
, (2020/02/25)
Herein, we report the palladium-catalyzed synthesis of 3-arylpropionate esters starting from secondary benzylic ethers. With this investigation it could be shown that ethers are suitable starting materials in addition to the established carbonylation reactions of olefins, alcohols, or aryl halides.