131061-12-6Relevant articles and documents
Heck reactions between aryl halides and olefins catalysed by Pd-complexes entrapped into zeolites NaY
Djakovitch, Laurent,Heise, Henrike,Koehler, Klaus
, p. 16 - 26 (1999)
Palladium complexes entrapped into zeolite cages have been prepared and characterised by MAS-NMR. They exhibit a high activity towards the Heck reaction of aryl bromides with olefins for small palladium concentrations (0.1 mol%). The catalysts can be easily separated from the reaction mixture and reused after washing without loss in activity. Except for very large complexes, no limitation to the diffusion of educts in the zeolite cages was observed. As for the homogeneous Heck reaction, the electronic nature of the aryl bromides and the olefins has a dominating effect on the reaction yield and selectivity. The heterogeneous catalysts activate even aryl chlorides under standard reaction conditions.
Gelatin-pyrolyzed mesoporous N-doped carbon supported Pd as high-performance catalysts for aqueous Heck reactions
Yang, Shuai,Chen, Yuli,Huang, Shuaijian,Deng, Lu,Wu, Yuanyuan,Zheng, Xiu,Omonov, Shakhzodjon,Zeng, Minfeng
, (2021/05/19)
Nitrogen-doped mesoporous carbon-supported Pd (Pd@N-C) catalysts were prepared by pyrolyzing gelatin/templates/PdCl2 hydrogels under N2 atmosphere at 800°C. Using poly (ethylene glycol) block poly (propylene glycol) block poly (ethyl
A Palladium NNC-Pincer Complex as an Efficient Catalyst Precursor for the Mizoroki?Heck Reaction
Hamasaka, Go,Ichii, Shun,Uozumi, Yasuhiro
supporting information, p. 1833 - 1840 (2018/04/05)
The Mizoroki?Heck reaction of aryl halides (iodides, bromides, or chlorides) with activated alkenes in the presence of a palladium NNC-pincer complex at ppb to ppm loadings gave the corresponding internal alkenes in excellent yields. The total turnover number and turnover frequency reached up to 8.70×108 and 1.21×107 h?1 (3.36×103 s?1), respectively. The catalyst was applied in a ten-gram-scale synthesis of the UV-B sunscreen agent octinoxate (2-ethylhexyl 4-methoxycinnamate). Reaction-rate analyses, transmission electron microscopic examination of the reaction mixture, and poisoning tests suggested that a monomeric palladium species is the catalytically active species in the catalytic cycle. (Figure presented.).