Search Results - "Otera, Junzo"

Toward Ideal (Trans)Esterification by Use of Fluorous Distannoxane Catalysts by Otera, Junzo

“…1,3-Disubstituted tetrakis(fluoroalkyl)distannoxanes, (XR2SnOSnR2Y)2 (R = C6F13C2H4 and C4F9C2H4), are highly fluorophilic and exhibit large partition…”
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Dicarbazolyldicyanobenzenes as Thermally Activated Delayed Fluorescence Emitters: Effect of Substitution Position on Photoluminescent and Electroluminescent Properties by Li, Bo, Nomura, Hiroko, Miyazaki, Hiroshi, Zhang, Qisheng, Yoshida, Kou, Suzuma, Yoshinori, Orita, Akihiro, Otera, Junzo, Adachi, Chihaya

“…We demonstrate two efficient blue-green thermally activated delayed fluorescence (TADF) compounds comprising a dimeric phenylcarbazole and four cyano…”
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One-Pot Transformation of Ph2P(O)-Protected Ethynes: Deprotection Followed by Transition Metal-Catalyzed Coupling by Peng, Lifen, Xu, Feng, Suzuma, Yoshinori, Orita, Akihiro, Otera, Junzo

“…Ph2P(O)-protected ethynes were successfully transformed to arylethynes in one-pot manner through t-BuOK-catalyzed deprotection followed by Sonogashira coupling…”
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Elimination Strategy for Aromatic Acetylenes by Orita, Akihiro, Otera, Junzo

“…Many classical elimination protocols are employable for constructing molecular architectures of structural interest. Elimination-based syntheses of aromatic…”
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Facile Carbolithiation of Bent Alkyne without Catalyst. Tandem Route to Dibenzo[b,f]pentalenes from Dibenzocyclooctadiyne by Babu, Govindarajulu, Orita, Akihiro, Otera, Junzo

“…Nucleophilic addition of RLi to a triple bond of dibenzocycloocta[a,e]diyne provides dibenzo[b,f]pentalene motif through trans-annulation of the resulting…”
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Selective Deprotection of Me3Si-/Ph2P(O)-protected Arylalkynes: Methyl Grignard Reagent-promoted Dephosphorylation of Ph2P(O)-protected Alkynes by Peng, Lifen, Xu, Feng, Shinohara, Kenta, Orita, Akihiro, Otera, Junzo

“…A Ph2P(O)-protected alkyne underwent dephosphorylation by treatment with MeMgBr in THF with Me3Si-protection untouched. The dephosphorylation followed by a…”
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Synthesis of 2,5-diaryloxazoles through van Leusen reaction and copper-mediated direct arylation by Yoshizumi, Tomoki, Satoh, Tetsuya, Hirano, Koji, Matsuo, Daisuke, Orita, Akihiro, Otera, Junzo, Miura, Masahiro

“…The direct arylation of 5-aryloxazoles, prepared by the van Leusen reaction, with various aryl iodides is effectively promoted by a system of CuI combined with…”
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A Simple Method for the Removal of Organotin Residues from Acetates and a Homoallylic Alcohol Prepared from Organostannane Reagents: Column Chromatography Using 10%-Moist SiO2

“…Simple column chromatography using 10%-moist silica gel enabled efficient removal of organotin residues from geranyl acetate, which was prepared by the…”
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In Search of Practical Esterification by Junzo Otera

“…The ultimate goal of producing esters in 100 % yield from an equimolar reaction of carboxylic acid and alcohol may not be far away: The research groups of…”
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DFT Study on Activation of Carbon Dioxide by Dimethytin Dimethoxide for Synthesis of Dimethyl Carbonate by Wakamatsu, Kan, Orita, Akihiro, Otera, Junzo

“…DFT calculations put forth theoretical grounds for a smooth reaction between methoxy and carbonate groups on the organotin template to afford dimethyl…”
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Fluoro-substituted Phenyleneethynylenes: Acetylenic n-Type Organic Semiconductors by Matsuo, Daisuke, Yang, Xin, Hamada, Akiko, Morimoto, Kyo, Kato, Takuji, Yahiro, Masayuki, Adachi, Chihaya, Orita, Akihiro, Otera, Junzo

“…Fluoro-substituted phenyleneethynylenes are synthesized by Sonogashira coupling and acetylide-nucleophilic substitution of fluorobenzenes. Fluoro-substitution…”
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Evaluation of Tin−Oxygen Bond Association by Means of ab Initio Molecular Orbital Calculations by Wakamatsu, Kan, Orita, Akihiro, Otera, Junzo

“…Ab initio calculations with MP2 provide reliable information about structure and bonding of organotin molecules. The association behavior of organotin…”
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Synthesis and Properties of 9,10-Anthrylene-substituted Phenyleneethynylene Dyes for Dye-sensitized Solar Cell by Yang, Xin, Fang, Jing-Kun, Suzuma, Yoshinori, Xu, Feng, Orita, Akihiro, Otera, Junzo, Kajiyama, Shingo, Koumura, Nagatoshi, Hara, Kohjiro

“…A series of 9,10-anthrylene-substituted phenyleneethynylenes having Ph2N and CN groups were synthesized. A dye-sensitized solar cell fabricated by both Ph2N-…”
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Double elimination protocol for aryleneethynylenes by Otera, Junzo

“…A variety of aryleneethynylenes are synthesized by double elimination reaction of β-substituted sulfones. The acetylenic bond is formed from readily available…”
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Metal-Assisted Assembly of Pyridine-Containing Arylene Ethynylene Strands to Enantiopure Double Helicates by Orita, Akihiro, Nakano, Takehiro, An, De Lie, Tanikawa, Kazumi, Wakamatsu, Kan, Otera, Junzo

“…Pyridine-containing arylene ethynylene strands were connected to the 2- and 2‘-positions of (R)- and (S)-1,1‘-binaphthyl templates. The arylene ethynylene…”
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One-Shot Double Elimination Process: A Practical and Concise Protocol for Diaryl Acetylenes by Orita, Akihiro, Taniguchi, Hisataka, Otera, Junzo

“…A variety of diaryl acetylenes were obtained in good yields when lithium hexamethyldisilazide was added to a solution of arylmethyl sulfone, aryl aldehyde, and…”
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Synthesis and spectroscopic study of diphenylamino-substituted phenylene-(poly)ethynylenes: remarkable effect of acetylenic conjugation modes by Fang, Jing-Kun, An, De-Lie, Wakamatsu, Kan, Ishikawa, Takeharu, Iwanaga, Tetsuo, Toyota, Shinji, Matsuo, Daisuke, Orita, Akihiro, Otera, Junzo

“…A series of diphenylamino-substituted phenylene-(poly)ethynylenes were successfully synthesized by a combination of Sonogashira coupling and double elimination…”
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Synthesis and spectroscopic study of silacyclyne-substituted phenyleneethynylenes by Mao, Guoliang, Orita, Akihiro, Matsuo, Daisuke, Hirate, Takayoshi, Iwanaga, Tetsuo, Toyota, Shinji, Otera, Junzo

“…A series of 1,1-dimethyl-4,5:8,9-dibenzo-1-silacycloundeca-4,8-diene-2,6,10-triyne (DST)-substituted phenyleneethynylenes were successfully synthesized by…”
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A Practical and Green Chemical Process: Fluoroalkyldistannoxane-Catalyzed Biphasic Transesterification by Xiang, Jiannan, Toyoshima, Shinji, Orita, Akihiro, Otera, Junzo

“…There is no need for the recovery of the catalyst in the fluorous biphasic transesterification catalyzed by [{Cl(C6F13CH2CH2)2SnOSn(C6F13CH2CH2)2Cl}2] (1; see…”
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Fluorous Biphasic Esterification Directed towards Ultimate Atom Efficiency by Xiang, Jiannan, Orita, Akihiro, Otera, Junzo

“…A perfectly selective esterification that discriminates between primary and sterically hindered or aromatic carboxylic acids occurs in the presence of the…”
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