The University of Osaka · Materials Science
Professor Takeshi Naota's research lab specializes in transition-metal-catalyzed organic transformations, with a strong focus on ruthenium- and palladium-catalyzed reactions for selective synthesis. Key research directions include the development of chemoselective oxidation methods—particularly aerobic and Baeyer-Villiger oxidations—using sustainable catalysts, and innovative applications of ultrasound in controlling sol-gel transitions and molecular assembly. The lab also explores efficient, metal-catalyzed condensation reactions for lactam and amide formation, emphasizing atom economy and functional group tolerance.
Figures are computed from collected data and may differ slightly.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRuthenium-Catalyzed Reactions for Organic SynthesisTakeshi Naota, Hikaru Takaya, and Shun-Ichi MurahashiView Author Information Department of Chemistry, Graduate School of Engineering Science, Osaka University, Machikaneyama, Toyonaka, Osaka 560-8531, Japan Cite this: Chem. Rev. 1998, 98, 7, 2599–2660Publication Date (Web):October 7, 1998Publication History Received13 March 1998Revised26 June 1998Published online7 October 1998Published inissue 5 Novemb
The first molecule that assembles by ultrasound is described. An association-inert dinuclear Pd complex, anti-1a, which is stabilized by intramolecular pi-stacking interactions, gelatinizes a variety of organic solvents instantly upon brief presonication for a few seconds. This is the first quick, positive, and reversible method for the remote switching of stable sol-gel phases. Uniquely, the rate can be precisely controlled over the range between "no gelation" and "instant gelation" simply by t
1,4- and 1,5-Amino alcohols undergo oxidative condensation upon treatment with dihydridotetrakis(triphenylphosphine)ruthenium(II) catalyst in the presence of a hydrogen acceptor to give the corresponding lactams. The principle of the present reaction can be extended to amide formation from aromatic aldehydes and secondary amines.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRuthenium-catalyzed aldol and Michael reactions of activated nitrilesTakeshi Naota, Hiroshi Taki, Masahiko Mizuno, and Shunichi MurahashiCite this: J. Am. Chem. Soc. 1989, 111, 15, 5954–5955Publication Date (Print):July 1, 1989Publication History Published online1 May 2002Published inissue 1 July 1989https://pubs.acs.org/doi/10.1021/ja00197a073https://doi.org/10.1021/ja00197a073research-articleACS PublicationsRequest reuse permissionsArticle Views1091A
Empfindliche Substrate wie Alkohole, Olefine und Sulfide, die unter gewöhnlichen Baeyer-Villiger-Bedingungen elektrophile Oxidationen eingehen würden, bleiben in einer hoch chemoselektiven katalytischen Baeyer-Villiger-Oxidation unversehrt (siehe Schema). Die Flavin-Verbindung [DMRFlEt]+[ClO4]− (blau) katalysiert die aerobe Baeyer-Villiger-Oxidation in Gegenwart von Zinkstaub. Supporting information for this article is available on the WWW under http://www.wiley-vch.de/contents/jc_2001/2005/z462
The aerobic oxidation of alcohols in water can be performed efficiently in the presence of a catalytic amount of the water-soluble diruthenium complex Ru2(micro-OAc)3(micro-CO3) under an atmospheric pressure (1 atm) of O2.
A versatile reducing agent, diimide, can be generated efficiently by the aerobic oxidation of hydrazine with neutral and cationic synthetic flavin catalysts 1 and 2. This technique provides a convenient and safe method for the aerobic reduction of olefins, which proceeds with 1 equiv of hydrazine under an atmosphere of O(2) or air. The synthetic advantage over the conventional gas-based method has been illustrated through high hydrazine efficiency, easy and safe handling, and characteristic chem
The synthesis, structure, and solid-state emission of vaulted trans-bis(salicylaldiminato)platinum(II) complexes are described. A series of polymethylene (1: n=8; 2: n=9; 3: n=10; 4: n=11; 5: n=12; 6: n=13) and polyoxyethylene (7: m=2; 8: m=3; 9: m=4) vaulted complexes (R=H (a), 3-MeO (b), 4-MeO (c), 5-MeO (d), 6-MeO (e), 4-CF3O (f), 5-CF3O (g)) was prepared by treating [PtCl2(CH3CN)2] with the corresponding N,N'-bis(salicylidene)-1,ω-alkanediamines. The trans coordination, vaulted structures, a
Morphology control for intense solid-state phosphorescence of non-emissive, but potentially emissive crystals of platinum complexes and the mechanistic rationale are described. A series of trans-bis(salicylaldiminato)platinum(II) complexes bearing linear alkyl chains (1a: n=5; 1b: n=8; 1c: n=12; 1d: n=14; 1e: n=16; 1f: n=18) was synthesized and the solid-state emission properties were examined by using crystals/aggregates prepared under various precipitation conditions. Crystals of 1e, prepared
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTSynthesis and Characterization of C- and N-Bound Isomers of Transition Metal α-CyanocarbanionsTakeshi Naota, Akio Tannna, and Shun-Ichi MurahashiView Author Information Department of Chemistry Graduate School of Engineering Science Osaka University, Machikaneyama Toyonaka, Osaka 560-8531, Japan Cite this: J. Am. Chem. Soc. 2000, 122, 12, 2960–2961Publication Date (Web):March 10, 2000Publication History Received16 December 1999Published online10 M
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