Výsledky vyhledávání - "Toshimichi Ohmura"

Mechanism of 2,6-Dichloro-4,4′-bipyridine-Catalyzed Diboration of Pyrazines Involving a Bipyridine-Stabilized Boryl Radical

Autor: Yusuke Miyake, Tetsuya Taketsugu, Toshimichi Ohmura, Yohei Morimasa, Yasujiro Murata, Tomoya Ichino, Satoshi Maeda, Michinori Suginome, Kunihiko Tajima

Publikováno v: Bulletin of the Chemical Society of Japan. 94:1894-1902

The mechanism of 4,4'-bipyridine-catalyzed diboration of pyrazines was studied by experimental observation of the inter-mediates and by theoretical calculations. Intermediary radical species were detected by ESR measurement of the reactions of 2,6-di

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3f4a542a1455e599ec913dfe82530409
https://doi.org/10.1246/bcsj.20210145

Zobrazit plný text záznamu

Intramolecular Addition of a Dimethylamino C(sp3)–H Bond across C–C Triple Bonds Using IrCl(DTBM-SEGPHOS)(ethylene) Catalyst: Synthesis of Indoles from 2-Alkynyl-N-methylanilines

Autor: Kaito Yagi, Toshimichi Ohmura, Takeru Torigoe, Michinori Suginome

Publikováno v: Synthesis. 53:3057-3064

Intramolecular addition of a C(sp3)–H bond of the dimethylamino group across the C–C triple bond in 2-alkynyl-N,N-dimethylanilines is effectively catalyzed by a new iridium complex, IrCl(DTBM-SEGPHOS)(C2H4), in mesitylene at 150 °C. The intramol

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::434c885d67da5965419785a44e5f55a9
https://doi.org/10.1055/a-1511-1025

Zobrazit plný text záznamu

Iridium-catalyzed enantioselective intramolecular hydroarylation of allylic aryl ethers devoid of a directing group on the aryl group

Autor: Satoshi Kusaka, Toshimichi Ohmura, Michinori Suginome

Publikováno v: Chemical Communications. 57:13542-13545

Although intramolecular hydroarylation is an attractive transformation of allylic aryl ethers, it has suffered from narrow substrate scope. We herein describe Ir/(S)-DTBM-SEGPHOS-catalyzed intramolecular hydroarylation of allylic aryl ethers. The rea

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::599765e7a1d9941683ef66379cb433f2
https://doi.org/10.1039/d1cc05684k

Zobrazit plný text záznamu

Copper-catalyzed regioselective trans-silaboration of internal arylalkynes with stereochemical switch to cis-addition mode

Autor: Yuta Takaoka, Toshimichi Ohmura, Michinori Suginome

Publikováno v: Chemical Communications. 57:4670-4673

Copper-catalyzed silafunctionalization of alkynes using a silylboronic ester as a silicon source has recently progressed rapidly. Generally, the reaction affords a product with cis-stereoselectivity. We herein describe trans-selective 1,2-addition of

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::38e2e747d97394549fcfc028af62ab26
https://doi.org/10.1039/d1cc01579f

Zobrazit plný text záznamu

Construction of Silicon-Containing Seven-Membered Rings by Catalytic [4 + 2 + 1] Cycloaddition through Rhodium Silylenoid

Autor: Ikuo Sasaki, Toshimichi Ohmura, Michinori Suginome

Publikováno v: Organic Letters. 22:2961-2966

A rhodium-catalyzed [4 + 2 + 1] cycloaddition involving 1,3-diene, alkyne, and silylene to afford silicon-containing seven-membered rings was established. In the presence of a rhodium catalyst bearing bis(diphenylphosphino)methane (DPPM), nona-1,3-di

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::881f208a5a1e8ddf86253c625a7f1ed3
https://doi.org/10.1021/acs.orglett.0c00690

Zobrazit plný text záznamu

Tandem C–H Transformations by a Single Iridium Catalyst: Direct Access to Indoles and Indolines from o-Alkyl-N-methylanilines

Autor: Toshimichi Ohmura, Satoshi Kusaka, Kaito Yagi, Michinori Suginome

Publikováno v: ACS Catalysis. 10:3152-3157

In the presence of an iridium catalyst bearing DTBM-SEGPHOS as a ligand and tert-butylethylene as a hydrogen scavenger, 2-ethyl-N-methylanilines were converted directly to 3-methylindoles in high yields. The reaction proceeded efficiently in mesityle

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c99cecac88ed7807394e3c400759e95e
https://doi.org/10.1021/acscatal.9b05579

Zobrazit plný text záznamu

Vyhledávací nástroje:

Upřesnit hledání