- The method for producing the phenyl boronic acid ester
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PROBLEM TO BE SOLVED: To provide a method for producing phenylboronic acid esters in good yield from diborons and aryl halides by using a nickel catalyst and a base. SOLUTION: In the method for producing phenylboronic acid esters represented by general formula (3), wherein A is an ethylene group or the like which may be substituted by a methyl group, R1is a fluorine atom or the like, and m is an integer of 0-5; diborons and a chlorobenzene derivative are reacted with each other by using a trimethylphosphine coordinated nickel catalyst and alkoxides. COPYRIGHT: (C)2013,JPOandINPIT
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Paragraph 0113; 0114
(2018/09/26)
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- Synthesis of an organic-soluble π-conjugated [3]rotaxane via rotation of glucopyranose units in permethylated β-cyclodextrin
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We synthesized symmetrically insulated oligo(para-phenylene) and oligothiophene with a pseudo-linked [3]rotaxane structure by full rotation of glucopyranose units via a flipping (tumbling) mechanism in the π-conjugated guest having two permethylated β-cyc
- Terao, Jun,Konoshima, Yohei,Matono, Akitoshi,Masai, Hiroshi,Fujihara, Tetsuaki,Tsuji, Yasushi
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supporting information
p. 2800 - 2808
(2015/02/19)
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- NiCl2(PMe3)2-catalyzed borylation of aryl chlorides
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The cross-coupling of aryl chlorides and bis(pinacolato)diboron was achieved using NiCl2(PMe3)2 catalyst in the presence of metal 2,2,2-trifluoroethoxide. The catalyst smoothly provided the desired products regardless of a variety of functional groups and substituted positions.
- Yamamoto, Tetsuya,Morita, Tomoyuki,Takagi, Jun,Yamakawa, Tetsu
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supporting information; experimental part
p. 5766 - 5769
(2012/01/06)
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- Flexible synthesis, structural determination, and synthetic application of a new C1-symmetric chiral ammonium betaine
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A C1-symmetric chiral ammonium betaine has been developed, and its intramolecular ion-pairing structure in solid state and its catalytic performance to achieve the highly stereoselective Mannich-type reaction of 2-alkoxythiazol-5(4H)-ones are r
- Uraguchi, Daisuke,Koshimoto, Kyohei,Ooi, Takashi
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supporting information; experimental part
p. 300 - 302
(2010/05/01)
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- Differentially protected benzenediboronic acids: Divalent cross-coupling modules for the efficient synthesis of boron-substituted oligoarenes
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On the basis of the boron-masking strategy, new divalent cross-coupling modules have been designed for the efficient synthesis of boronsubstituted oligoarenes. The modules, i.e., monoprotected o-, m-, and p-benzenediboronic acid derivatives, undergo highly selective SuzukiMiyaura coupling with sp 2 iodides, bromides, chlorides, and triflates, affording coupling products in which the protected boronyl groups are left intact.
- Noguchi, Hiroyoshi,Shioda, Takayuki,Chou, Chih-Ming,Suginome, Michinori
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p. 377 - 380
(2008/09/19)
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