- PALLADIUM CATALYST AND PROCESS FOR PRODUCTION OF BISARYL COMPOUND USING SAME
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Disclosed are: a novel palladium catalyst which does not undergo leakage, can be recycled, does not require the use of any phosphorus-containing ligand, and has a high catalytic activity; and a process for producing a novel bisaryl compound using the palladium catalyst. In the production of a bisaryl compound by reacting an aromatic halide with an aromatic boronic acid in the presence of a palladium catalyst and a base, the palladium catalyst comprises a dendrimer containing a silica particle as a core and a palladium compound dissolved in an ionic liquid and supported on the dendrimer.
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Page/Page column 6
(2012/09/22)
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- A highly sustainable and active catalyst for Suzuki-Miyaura reaction: Palladium-supported ionic liquid catalyst (SILC) coated with polymer
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With the aid of an ionic liquid, palladium acetate was immobilized in the pores of silica gel, which was coated with polyethylene terephthalate. The heterogeneous catalyst was effective for Suzuki-Miyaura reactions of ortho-substituted aryl bromides, aryl triflates, and arylboronic acids in aqueous ethanol at room temperature, and could be re-used up to ten times. Georg Thieme Verlag Stuttgart · New York.
- Hagiwara, Hisahiro,Sato, Kota,Hoshi, Takashi,Suzuki, Toshio
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experimental part
p. 2545 - 2550
(2011/12/04)
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- Immobilization of Pd on nanosilica dendrimer as SILC: Highly active and sustainable cluster catalyst for suzuki-miyaura reaction
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Palladium acetate was noncovalently immobilized as a supported ionic liquid catalyst (SILC) in a nanosilica dendrimer, PAMDMAM, with the aid of an ionic liquid to form a cluster catalyst of palladium nanoparticles. The pseudo-homogeneous heterogenized catalyst, Pd-nanoPAMDMAM-SILC, was effective for Suzuki-Miyaura reactions of ortho-substituted aryl bromides or aryl triflates without a ligand in 50% aqueous ethanol in air at room temperature. The catalyst could be re-used up to five times in 93% average yield after simple centrifugation. TON reached 176,000. Georg Thieme Verlag Stuttgart.
- Hagiwara, Hisahiro,Sasaki, Hirokazu,Tsubokawa, Norio,Hoshi, Takashi,Suzuki, Toshio,Tsuda, Tetsuya,Kuwabata, Susumu
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experimental part
p. 1990 - 1996
(2010/10/02)
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- Platinum-catalysed diborylation of arynes: Synthesis and reaction of 1,2-diborylarenes
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Arynes are found to be facilely inserted into bis(pinacolato)diboron by using a platinum-isocyanide catalyst, affording diverse 1,2-diborylarenes, which can be converted into o-terphenyls via Suzuki-Miyaura coupling reaction.
- Yoshida, Hiroto,Okada, Kengo,Kawashima, Shota,Tanino, Kenji,Ohshita, Joji
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supporting information; experimental part
p. 1763 - 1765
(2010/07/04)
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- A general palladium-catalyzed Suzuki-Miyaura coupling of aryl mesylates
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(Chemical Equation Presented) Catalyze this! The first palladium-catalyzed Suzuki-Miyaura coupling of unactivated aryl mesylates is reported, with not only arylboronic acids, but also other organoboron nucleophiles (see picture; Z=B(OH)2, BF3K, BPin). The reaction conditions are compatible with various common functional groups (R1=alkyl, OMe, CHO, CO, CN, CO2R′, heteroaryl).
- So, Chau Ming,Lau, Chak Po,Kwong, Fuk Yee
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supporting information; experimental part
p. 8059 - 8063
(2009/04/13)
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- A practical and general synthesis of unsymmetrical terphenyls
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(Chemical Equation Presented) A synthetic procedure was developed that enables sequential chemoselective Suzuki-Miyaura cross-coupling of chlorobromobenzene with arylboronic acids. The first coupling is achieved at room temperature using a ligandless palladium catalyst. The chlorobiaryl product can then be subjected directly to the second coupling, facilitated by the SPhos ligand. Using this methodology, parallel synthesis of 32 unsymmetrical o-, m-, and p-terphenyl compounds was accomplished in good to excellent overall yields.
- Antelo Miguez, Jose M.,Adrio, Luis Angel,Sousa-Pedrares, Antonio,Vila, Jose M.,Hii, King Kuok
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p. 7771 - 7774
(2008/02/12)
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- Photopolymerization initiators
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Ethylenically unsaturated monomers in the presence of a novel aromatic oligomeric compound or polymer having a polyhaloacetyl moiety attached thereto are polymerized upon exposure to a source of radiation.
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