The Experts below are selected from a list of 26691 Experts worldwide ranked by ideXlab platform
Deping Wang - One of the best experts on this subject based on the ideXlab platform.
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efficient stille Cross Coupling Reaction catalyzed by the pd oac 2 dabco catalytic system
ChemInform, 2005Co-Authors: Yun Liang, Deping Wang, Wenjie Liu, Yexiang Xie, Dulin YinAbstract:[Reaction: see text] An efficient Pd(OAc)2/Dabco-catalyzed Stille Cross-Coupling Reaction procedure has been developed. In the presence of Pd(OAc)2 and Dabco (triethylenediamine), various aryl halides including aryl iodides, aryl bromides, and activated aryl chlorides were coupled efficiently with organotin compounds to afford the corresponding biaryls, alkene, and alkynes in good to excellent yields. Furthermore, high TONs [turnover numbers, up to 980,000 TONs for the Coupling Reaction of 1-bromo-4-nitrobenzene and furan-2-yltributyltin] for the Stille Cross-Coupling Reaction were observed.
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efficient stille Cross Coupling Reaction catalyzed by the pd oac 2 dabco catalytic system
Journal of Organic Chemistry, 2005Co-Authors: Jinheng Li, Yun Liang, Deping WangAbstract:An efficient Pd(OAc)2/Dabco-catalyzed Stille Cross-Coupling Reaction procedure has been developed. In the presence of Pd(OAc)2 and Dabco (triethylenediamine), various aryl halides including aryl iodides, aryl bromides, and activated aryl chlorides were coupled efficiently with organotin compounds to afford the corresponding biaryls, alkene, and alkynes in good to excellent yields. Furthermore, high TONs [turnover numbers, up to 980 000 TONs for the Coupling Reaction of 1-bromo-4-nitrobenzene and furan-2-yltributyltin] for the Stille Cross-Coupling Reaction were observed.
Hironao Sajiki - One of the best experts on this subject based on the ideXlab platform.
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a practical protocol for the hiyama Cross Coupling Reaction catalyzed by palladium on carbon
ChemInform, 2013Co-Authors: Yasunari Monguchi, Takayoshi Yanase, Shigeki Mori, Hironao SajikiAbstract:Optimized Reaction conditions including Pd-C as the catalyst and water as a promotor are developed for the Hiyama Cross-Coupling Reaction of aryl halides with arylsilanes to synthesize biaryls (III) (21 examples).
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a practical protocol for the hiyama Cross Coupling Reaction catalyzed by palladium on carbon
Synthesis, 2012Co-Authors: Yasunari Monguchi, Takayoshi Yanase, Shigeki Mori, Hironao SajikiAbstract:A method for the palladium on carbon (Pd/C) catalyzed Cross-Coupling Reaction between aryl halides and trialkoxy(aryl)silanes in the presence of a small amount of water is established using tris(4-fluorophenyl)phosphine as the ligand. A range of biaryl compounds is prepared using this protocol.
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ligand free hiyama Cross Coupling Reaction catalyzed by palladium on carbon
RSC Advances, 2012Co-Authors: Takayoshi Yanase, Yasunari Monguchi, Hironao SajikiAbstract:A ligand-free Pd/C-catalyzed Hiyama Cross-Coupling Reaction has been developed. A variety of aryl bromides were efficiently Cross-coupled with aryltriethoxysilanes with only 0.5 mol% of 5% Pd/C. The protocol would be practical for use as an economical synthetic method for the construction of biphenyl derivatives.
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pd c catalyzed and water mediated hiyama Cross Coupling Reaction using an electron deficient phosphine ligand
Chemistry Letters, 2011Co-Authors: Takayoshi Yanase, Yasunari Monguchi, Shigeki Mori, Hironao SajikiAbstract:The Pd/C-catalyzed Hiyama Cross-Coupling Reaction between a variety of aryl halides and aryltriethoxysilanes was developed. Since only small amounts of the 10% Pd/C (0.5 mol %) and phosphine ligand...
Yasuyuki Kita - One of the best experts on this subject based on the ideXlab platform.
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metal free oxidative Cross Coupling Reaction of thiophene iodonium salts with pyrroles
European Journal of Organic Chemistry, 2016Co-Authors: Koji Morimoto, Akira Nakamura, Toshifumi Dohi, Yasuyuki KitaAbstract:The hypervalent-iodine-mediated oxidative metal-free Cross-Coupling Reaction of thiophenes with various pyrroles was developed. The corresponding thiophene–pyrrole derivatives were obtained in moderate to high yields (up to 85 %). This method features high efficiency and regioselectivity and broad functional group tolerance. We further determined the highly planar characteristics of the 3,4-ethylenedioxythiophene–pyrrole biaryls caused by intramolecular hydrogen bonding.
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organo iodine iii catalyzed oxidative phenol arene and phenol phenol Cross Coupling Reaction
ChemInform, 2016Co-Authors: Koji Morimoto, Kazuma Sakamoto, Takao Ohshika, Toshifumi Dohi, Yasuyuki KitaAbstract:A hypervalent iodine(III)-catalyzed intermolecular oxidative Cross-Coupling Reaction of electron-rich aromatic compounds is achieved by using a catalytic amount of an iodoarene and an inorganic oxidant.
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organo iodine iii catalyzed oxidative phenol arene and phenol phenol Cross Coupling Reaction
Angewandte Chemie, 2016Co-Authors: Koji Morimoto, Toshifumi Dohi, Kazuma Sakamoto, Takao Ohshika, Yasuyuki KitaAbstract:The direct oxidative Coupling Reaction has been an attractive tool for environmentally benign chemistry. Reported herein is that the hypervalent iodine catalyzed oxidative metal-free Cross-Coupling Reaction of phenols can be achieved using Oxone as a terminal oxidant in 1,1,1,3,3,3-hexafluoropropan-2-ol (HFIP). This method features a high efficiency and regioselectivity, as well as functional-group tolerance under very mild Reaction conditions without using metal catalysts.
Xiaoqing Jiang - One of the best experts on this subject based on the ideXlab platform.
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synthesis of biaryl derivatives via a magnetic pd nps catalyzed one pot diazotization Cross Coupling Reaction
ChemInform, 2013Co-Authors: Yan Zong, Jiefeng Hu, Xiaoqing JiangAbstract:The one-pot diazotization-Cross Coupling Reaction of anilines (I) and arylboronic acids (II) affords the biaryls (III) in sufficient to high yields [with exception of (IIId)].
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synthesis of biaryl derivatives via a magnetic pd nps catalyzed one pot diazotization Cross Coupling Reaction
Synlett, 2012Co-Authors: Yan Zong, Jiefeng Hu, Xiaoqing JiangAbstract:A magnetic Pd-NPs-catalyzed one-pot diazotization–Cross-Coupling Reaction of anilines and arylboronic acids was developed. Biaryl derivatives were therefore synthesized in good to excellent yields. Through magnetic separation, the catalyst could be recovered and reused for five times. There were several obvious advantages such as broad applicability, high selectivity, simply experimental operation as well as the convenient preparation, high efficiency and reusability of catalyst.
Utpal Bora - One of the best experts on this subject based on the ideXlab platform.
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A green protocol for ligand, copper and base free Sonogashira Cross-Coupling Reaction
Tetrahedron Letters, 2016Co-Authors: Anindita Dewan, Manashi Sarmah, Utpal Bora, Ashim Jyoti ThakurAbstract:Abstract A convenient methodology has been developed for palladium catalyzed Sonogashira Cross-Coupling Reaction under mild and green Reaction conditions. The Reaction is catalyzed by an in situ generated catalytic system based on Pd(OAc)2 and WEB (water extract of banana peels ash) in the absence of any organic or inorganic base, ligand and copper salt with excellent yield of Cross coupled product. The Reaction condition is compatible with electronically diversified aryl iodides and electronically diversified aryl or aliphatic alkyne. The present method developed for the Sonogashira Reaction offers many advantages including high conversion, high economy, the involvement of non-toxic green substrates, etc.
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simple aminobenzoic acid promoted palladium catalyzed room temperature suzuki miyaura Cross Coupling Reaction in aqueous media
Tetrahedron Letters, 2015Co-Authors: Gayatri Sarmah, Utpal BoraAbstract:Abstract A highly efficient catalytic system based on Pd(OAc)2 and 4-aminobenzoic acid has been developed for the room temperature Suzuki–Miyaura Cross-Coupling Reaction in aqueous media. The system can tolerate a wide range of functionalized arylboronic acids and aryl halides. Furthermore, this protocol is also applicable for hetero-aryl bromides and hetero-arylboronic acids.