label: url

en: Blue Luminescent Boron Complexes Based on N,N-Type Imidazo[1,5-a]pyridine Ligand for Mitochondrial Imaging

en: Asian Journal of Organic Chemistry

ja: Asian Journal of Organic Chemistry


en: Mechanochemical transformation of tetraaryl[3]cumulenes to benzofulvenes via electrophilic iodocyclization

en: RSC Mechanochemistry

ja: RSC Mechanochemistry


en: Synthesis of Alkynyl Spacer-Containing Chiral Polyguanidines and Their Noncovalent Modification for Organocatalyst Design

en: Molecular Catalysis

ja: Molecular Catalysis


en: Divalent metal complexes of N,O- and N,N-bidentate imidazo[1,5-a]pyridine ligands: Synthesis, crystal structures, and photophysical properties

en: Inorganica Chimica Acta

ja: Inorganica Chimica Acta


en: Immobilization of a flavin molecule onto poly(methacrylic acid)s and its application in aerobic oxidation catalysis: effect of polymer stereoregularity

en: Organic & Biomolecular Chemistry

ja: Organic & Biomolecular Chemistry


en: Noncovalent Modification Strategy with Achiral Phosphoric Acid Diesters for Designing a Chiral Brønsted Base Organocatalyst

en: Bulletin of the Chemical Society of Japan


en: Synthesis of Optically Active Polyguanidines by Polyaddition Reaction of Biscarbodiimides with Chiral Diamines

en: ACS Omega

ja: ACS Omega


en: Hydrogen-Bond-Assisted Asymmetric Radical Cyclopolymerization of N-allyl-N- tert-butylacrylamide in the Presence of Chiral Tartrates

en: 光学活性な酒石酸エステル存在下，N-アリル-N-tert-ブチルアクリルアミドのラジカル環化重合を行うと，光学活性なポリマーが得られることを見出した．比旋光度および円二色性スペクトルなどの光学特性や脱tert-ブチル化したポリマーのNMRスペクトルから，L-酒石酸エステルを添加すると(3S,4S)-transの立体構造を有する繰り返し単位が優先的に生成することがわかった．

en: Polymer

ja: Polymer


en: Effect of Stereochemistry on the Catalytic Activity of Flavopeptides

en: Tetrahedron Letters

ja: Tetrahedron Letters


en: Alloxazinium-Resins as Readily Available and Reusable Oxidation Catalysts

ja: Bulletin of the Chemical Society of Japan


en: Determination of acid dissociation constants of flavin analogues by capillary zone electrophoresis

en: Acid dissociation constants (pK ) of nine kinds of flavin analogues as molecular catalyst candidates were determined by CZE. Although some of the analogues are instable and degradable under the light exposure or in alkaline aqueous solutions, the effective electrophoretic mobility of the flavin analogue of interest has been measured with the residual substance. The pK values of the flavin analogues were analyzed through the changes in the effective electrophoretic mobility with varying pH of the separation buffer. One or two steps pK values were determined by the analysis. One of the degraded species from the flavin analogues, lumichrome, was also detected in the CZE analysis, and its pK values were also determined. While coexisting impurities generated over the storage conditions were found in some analogues, the pK values of the target analogues were successfully determined with the help of the CZE separations. A pressure-assisted CZE was utilized for the determination or the estimation of the pK values of such analogues as possessing carboxylic acid moiety.

en: Electrophoresis

ja: Electrophoresis


en: An Uncommon Use of Irradiated Flavins: Brønsted Acid Catalysis

en: Chemical Communications

ja: Chemical Communications


en: Preparation of Flavin-Containing Mesoporous Network Polymers and Their Catalysis


en: Nucleophilic Addition to Nitrones Using a Flow Microreactor

en: Synlett

ja: Synlett


en: Efficient Use of Photons in Photoredox/Enamine Dual Catalysis with a Peptide-Bridged FlavinAmine Hybrid

en: An isoalloxazine (flavin) ring system and a secondary amine have been integrated through a short peptide linker with the aim of using photons as efficiently as possible in photoredox/enamine dual catalysis. We herein report a peptide-bridged flavin-amine hybrid that can catalyze α-oxyamination of aldehydes with TEMPO under weak blue light irradiation to achieve an extremely high quantum yield of reaction (Φ = 0.80).

en: Organic Letters

ja: Organic Letters


en: Observation of the interaction between avidin and iminobiotin using a graphene FET on a SiC substrate

en: Japanese Journal of Applied Physics

ja: Japanese Journal of Applied Physics


en: Flavinium and Alkali Metal Assembly on Sulfated Chitin: A Heterogeneous Supramolecular Catalyst for H2O2-Mediated Oxidation

en: ChemSusChem

ja: ChemSusChem


en: Suppression of protein adsorption on a graphene surface by phosphorylcholine functionalization


en: Greener Preparation of 5-Ethyl-4a-hydroxyisoalloxazine and Its Use for Catalytic Aerobic Oxygenations

en: European Journal of Organic Chemistry

ja: European Journal of Organic Chemistry


en: Enzyme-like Regiodivergent Behavior of a Flavopeptide Catalyst in Aerobic Baeyer-Villiger Oxidation

en: We recently developed a flavopeptide immobilized on polystyrene resin, , that could realize the first 5-unmodified neutral flavin ()-catalyzed aerobic oxygenation reactions under non-enzymatic conditions. Although a key active species is assumed to be the corresponding 4a-hydroperoxyflavin () from the unprecedented activity and unique chemoselectivity, further circumstantial support would be helpful to be sure since spectroscopic evidence is difficult to obtain due to the compound's insolubility. In this article, we report that the aerobic Baeyer-Villiger oxidation of a fused cyclobutanone, (±)--bicyclo[3.2.0]hept-2-en-6-one (), can be promoted with in a FMO-like chemoselectivity and regiodivergent manner -related catalytic intermediates, which delivers strong evidence of the involvement of as an active species in -catalyzed aerobic oxygenation reactions.

en: Chimia

ja: Chimia


en: Advanced Flavin Catalysts Elaborated with Polymers

en: Polymer Journal

ja: Polymer Journal


en: Design of Peptide-Containing N5-Unmodified Neutral Flavins That Catalyze Aerobic Oxygenations

en: Chemical Science

ja: Chemical Science


en: Brønsted Acid Catalysed Aerobic Reduction of Olefins by Diimide Generated In Situ from Hydrazine

en: SynOpen

ja: SynOpen


en: Synthesis of Insoluble Polystyrene-Supported Flavins and Their Catalysis in Aerobic Reduction of Olefins

en: Journal of Polymer Science Part A: Polymer Chemistry


en: Facile Preparation of Flavinium Organocatalysts

en: We developed a safe, simple, inexpensive, and environmentally benign method for preparing N(5)-ethylated flavinium organocatalysts without using hazardous reagents or inert conditions as previously required. 5-Ethyl-3-methyllumiflavinium cation was prepared from its reduced form by NaNO2 -free aerobic oxidation, which was subsequently extracted onto commercial cation-exchange resins under NaClO4 -free conditions. The resulting resin-immobilized flavinium salts were found to be effective organocatalysts for aerobic oxidation reactions.


en: Controlled Physical Gelation of Thermoresponsive Poly(2-propionamidoacrylic acid) Aqueous Solution

en: Advanced Materials Research

ja: Advanced Materials Research


en: Organocatalytic stereoselective synthesis of acyclic -nitrothioesters with all-carbon quaternary stereogenic centers.

en: A method for the stereoselective synthesis of acyclic thioesters bearing adjacent quaternary and tertiary stereogenic centers under mild organocatalytic conditions was developed. -Substituted monothiomalonates (MTMs) were used as thioester enolate equivalents. They reacted cleanly with nitroolefins in the presence of 1-6 mol % of cinchona alkaloid urea derivatives, and provided access to -nitrothioesters with quaternary stereocenters in high yields and diastereo- and enantioselectivities. Mechanistic investigations provided insight into the parameters that determine the stereoselectivity and showed that the diastereoselectivity can be controlled by the nature of the MTM substrate. The different reactivities of the three functional groups (oxoester, thioester, nitro moieties) within the conjugate addition products allowed for straightforward access to other compounds with quaternary stereogenic centers, such as -nitroaldehydes and -butyrolactams.

en: The Journal of Organic Chemistry

ja: The Journal of Organic Chemistry


en: Peptide-Catalyzed 1,4-Addition Reactions of Aldehydes to Nitroolefins

en: Conjugate addition reactions of aldehydes to nitroolefins provide synthetically useful gamma-nitroaldehydes. Here we summarize our research on peptide-catalyzed conjugate addition reactions of aldehydes to differently substituted nitroolefins. We show that peptides of the general type Pro-Pro-Xaa (Xaa = acidic amino acid) are not only highly active, robust and stereoselective catalysts but have also remarkable chemoselectivities.


en: Enamine Catalysis in Flow with an Immobilized Peptidic Catalyst

en: Pep talk: An immobilized peptidic catalyst achieves more than 600 turnovers in a continuous-flow system, allowing the production of chiral γ-nitroaldehydes with excellent stereoselectivities on a scale of >450 mmol (>100 g). Such a high efficiency opens the way for more practical applications of enamine catalysis.

en: ChemSusChem


en: Efficient Recovery and Reuse of an Immobilized Peptidic Organocatalyst

en: Advanced Synthesis & Catalysis

ja: Advanced Synthesis & Catalysis


en: Synthesis of polymers containing chiral 1,2-diamine derivatives and their application to asymmetric reactions

en: Pure and Applied Chemistry

ja: Pure and Applied Chemistry


en: Asymmetric Transfer Hydrogenation of Imines Catalyzed by Polymer-Immobilized Chiral Catalyst

en: The asymmetric transfer hydrogenation of imines was performed with the use of a polymer-immobilized chiral catalyst. The chiral catalyst, prepared from crosslinked polystyrene-immobilized chiral 1,2-diamine monosulfonamide, was effective in the asymmetric transfer hydrogenation of N-benzyl imines in CH(2)Cl(2) to give a chiral amine in high yield and good enantioselectivity. Furthermore, an amphiphilic polymeric catalyst prepared from crosslinked polystyrene containing sulfonated groups successfully catalyzed the asymmetric transfer hydrogenation of cyclic imines in water. Enantioenriched secondary amines with up to 94% ee were obtained by using a polymeric catalyst.

en: Organic & Biomolecular Chemistry

ja: Organic & Biomolecular Chemistry


en: An Immobilization Method of Chiral Quaternary Ammonium Salts onto Polymer Supports

en: Angewandte Chemie International Edition

ja: Angewandte Chemie International Edition


en: Asymmetric Transfer Hydrogenation of Aromatic Ketones in Water using a Polymer-Supported Chiral Catalyst Containing a Hydrophilic Pendant Group


en: Asymmetric Hydrogenation of Aromatic Ketones using Polymeric Catalyst prepared from Polymer-Supported 1,2-Diamine

en: Journal of Organometallic Chemistry

ja: Journal of Organometallic Chemistry


en: Design of Novel Polymer-Supported Chiral Catalyst for Asymmetric Transfer Hydrogenation

en: Tetrahedron Letters

ja: Tetrahedron Letters


en: Blue Luminescent Boron Complexes Based on N,N-type Bidentate Imidazo[1,2-a]pyridine Ligands

en: 次世代光フォーラム 2024 in 徳島 論文集

ja: 次世代光フォーラム 2024 in 徳島 論文集


en: Naphthalene-fused Imidazo[1,2-a]pyridinium Salts Showing Green Emission with High Quantum Yields and Large Stokes Shift

en: 次世代光フォーラム 2024 in 徳島 論文集

ja: 次世代光フォーラム 2024 in 徳島 論文集


en: Photoinduced Asymmetric α-Oxyamination of Aldehydes Using a Flavin Catalyst and Blue LED Irradiation

en: Proceedings of the LED General Forum 2021


en: Photoinduced conversion on dithioacetals into carbonyls with a flavin catalyst under blue LED irradiation

en: Proceedings of the LED General Forum 2019


en: Design of Flavin-Amine Integrated Catalysts for -Oxyamination of Aldehydes under Blue LED Irradiation

en: Proceedigs of the LED General Forum 2018 Tokushima


en: Thioacetalization of Aldehydes Using a Flavin Catalyst and Blue LED Irradiation

en: LED総合フォーラム2016in徳島論文集

ja: LED総合フォーラム2016in徳島論文集


en: Flavin Catalysis with Photoredox Activity Under Blue LED Irradiation

en: LED総合フォーラム2016in徳島論文集

ja: LED総合フォーラム2016in徳島論文集


en: Visible Light-Induced alfa-Oxyamination of Aldehydes with Flavin Organocatalysts

en: LED総合フォーラム2015 in 徳島 論文集

ja: LED総合フォーラム2015 in 徳島 論文集


en: LED光を用いたフラビン触媒によるアルデヒドのチオアセタール化反応

ja: LED光を用いたフラビン触媒によるアルデヒドのチオアセタール化反応

en: LED総合フォーラム2014-2015 in 徳島 論文集

ja: LED総合フォーラム2014-2015 in 徳島 論文集


en: フラビン分子を触媒とした光レドックス反応

ja: フラビン分子を触媒とした光レドックス反応