Výsledky vyhledávání - "Yoshio Urawa"

N-Arylation of Benzimidazole with Arylboronate, Boroxine and Boronic Acids. Acceleration with an Optimal Amount of Water

Autor: Yoshio Urawa, Shigeru Soda, Katsutoshi Nishiura

Publikováno v: Advanced Synthesis & Catalysis. 346:1679-1684

The coupling of benzimidazole 1 with arylboronate, boroxine, and boronic acids is accelerated efficiently by the addition of an optimal amount of water. This coupling reaction proceeds in nearly quantitative yield at 30 °C under an atmosphere of air

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::4464989fa4fc91f3002b8ac1bd749a68
https://doi.org/10.1002/adsc.200404193

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A Novel Methodology for Efficient Removal of Residual Palladium from a Product of the Suzuki−Miyaura Coupling with Polymer-Supported Ethylenediamine Derivatives

Autor: Mamoru Miyazawa, Yoshio Urawa, Katsuyuki Ogura, Naoki Ozeki

Publikováno v: Organic Process Research & Development. 7:191-195

In our investigation to efficiently remove residual palladium from a drug candidate prepared via the Suzuki−Miyaura coupling reaction, it was found that polymer-bound ethylenediamines can absorb both Pd(0) and Pd(II). This property was applied to t

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::bd9f8fb74fd071065202d14a971b0689
https://doi.org/10.1021/op0255682

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Investigations into the Suzuki–Miyaura coupling aiming at multikilogram synthesis of E2040 using (o-cyanophenyl)boronic esters

Autor: Hiroyuki Naka, Katsuyuki Ogura, Mamoru Miyazawa, Yoshio Urawa, Shigeru Souda

Publikováno v: Journal of Organometallic Chemistry. 653:269-278

The Suzuki–Miyaura cross-coupling reaction between 1-{3-bromo-4-chloro-5-[1-( R )-fluoropropyl]}phenylpiperazine (( R )- 1b ) and thermally unstable ( o -cyanophenyl)boronic ester 6b in the presence of dichlorobis(triphenylphosphine)palladium and p

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d12ba1f28c75a262f78c2db183fae1e7
https://doi.org/10.1016/s0022-328x(02)01175-0

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A convenient method for preparing aromatic ketones from acyl chlorides and arylboronic acids via Suzuki–Miyaura type coupling reaction

Autor: Katsuyuki Ogura, Yoshio Urawa

Publikováno v: Tetrahedron Letters. 44:271-273

Aromatic ketones are synthesized efficiently via palladium-catalyzed cross-coupling reaction of boronic acids with acyl chlorides in the presence of K 3 PO 4 hydrate in toluene. This allows the use of aliphatic acyl chlorides as the starting material

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0c9c801a2554cb05b7faa7cc35d6bcc5
https://doi.org/10.1016/s0040-4039(02)02501-7

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A Convenient Method for Preparing Aromatic α,β-Unsaturated Ketones from α,β-Unsaturated Acyl Chlorides and Arylboronic Acids via Suzuki—Miyaura Type Coupling Reaction

Autor: Katsutoshi Nishiura, Yoshio Urawa, Shigeru Souda, Katsuyuki Ogura

Publikováno v: ChemInform. 35

Aromatic α,β-unsaturatetl ketones are synthesized efficiently by palladium-catalyzed cross-coupling reaction of arylboronic acids with α,β-unsaturated acyl chlorides in the presence of K 3 PO 4 hydrate in toluene.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3796d4f4f4353e150076aedbec8f5971
https://doi.org/10.1002/chin.200421061

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A Convenient Method for Preparing Aromatic Ketones from Acyl Chlorides and Arylboronic Acids via Suzuki—Miyaura Type Coupling Reaction

Autor: Katsuyuki Ogura, Yoshio Urawa

Publikováno v: ChemInform. 34

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::1e9bff3b80bf3d57120175dfc4bf73e9
https://doi.org/10.1002/chin.200314100

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