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Trapping the Short-Chain Odd Carbon number Olefins Using nickel(Ⅱ)-Catalyzed Tandem Ethylene Oligomerization and Friedel-Crafts Alkylation of Toluene

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Chinese Journal of Chemistry 2023年第21期41卷 2855-2865页

作者： Sergey V.Zubkevich Vladislav A.Tuskaev Svetlana Ch.Gagieva Alexander A.Pavlov Victor n.Khrustalev Fei Wang Li Pan Yuesheng Li Daniele Saracheno Anton A.Vikhrov Dmitry n.Zarubin Boris M.Bulychev Department of Chemistry Lomonosov Moscow State UniversityLeninskie Gory 1Moscow119991 Russian Federation Materials Research and Technology Department Luxembourg Institute of Science and Technology5Avenue des Hauts-FourneauxL-4362 Esch-sur-AlzetteLuxembourg A n nesmeyanov Institute of Organoelement Compounds Russian Academy of SciencesVavilova st.28Moscow119991 Russian Federation BMSTU Center of national Technological Initiative“Digital Material Science:new Material and Substances” Bauman MoscowState Technical University2nd Baumanskaya st.5MoscowRussian Federation Peoples’Friendship University of Russia(RUDn University) Miklukho-Maklay St.6Moscow117198 Russian Federation Zelinsky Institute of Organic Chemistry Russian Academy of SciencesLeninsky Prospekt 47Moscow119991 Russian Federation Institute of Advanced Polymer Materials School of Materials Science and EngineeringTianjin UniversityTianjin300350 China

nickel(Ⅱ)complexes with pyrazole-based ligands are widely employed in catalysis of ethylene oligomerization and subsequent Friedel-Crafts alkylation of *** have prepared ten new nickel(Ⅱ)dibromide complexes with various substituted bis(azolyl)*** have been characterized using^(1)H nMR,IR,high resolution mass spectrometry and elemental *** structures of three complexes have been unambiguously established using X-ray *** was found that these complexes in the presence of Et2AlCl or Et_(3)Al_(2)Cl_(3)are active both in ethylene oligomerization and Friedel-Crafts alkylation processes(activity up to 3720 kgoligomer·mol[ni]^(−1)·h^(−1)).The use of Et_(3)Al_(2)Cl_(3)results in a higher share of alkylated products(up to 60%).Moreover,catalytic systems activated with Et_(3)Al_(2)Cl_(3)produced small amounts of odd carbon number olefins(up to 0.8%).The Friedel-Crafts alkylation was used as a trap for previously undetected short-chain odd carbon number olefins(C_(3)and C_(5)).

关键词： Ethylene oligomerization Friedel-Crafts alkylation nickel(Ⅱ)complexes n-ligands Odd carbon number olefins

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PEG Click-Triazole Palladacycle： An Efficient Precatalyst for Palladium-Catalyzed Suzuki-Miyaura and Copper-free Sonogashira Reactions in neat Water

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Chinese Journal of Chemistry 2015年第7期33卷 705-710页

作者： Guofu Zhang Wei Zhang Yuxin Luan Xingwang Han Chengrong Ding College of Chemical Engineering Zhejiang University of Technology Hangzhou Zhejiang 310014 China

A novel water-soluble, phosphine-free PEG ＂click＂ triazole palladacycle has been successfully synthesized. As a precatalyst, the palladacycle exhibited superior catalytic activity towards Suzuki-Miyaura and copper-free Sonogashira cross-coupling in neat water with the turnover numbers （TOns） of up to 9.8 × 10^5. In addition, the cata- lyst could be reused at least 3 times without significant loss of reactivity.

关键词： palladium cross-coupling palladacycle n-ligands green chemistry

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