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Research

The major research interests focus on the development of photochemical reactions,  the design and synthesis of organic photoredox catalysts.

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Strongly reducing helical phenothiazines as recyclable organophotoredox catalysts

Ando, H.; Takamura, H.; Kadota, I.*; Tanaka, K.*
Chem. Commun. 2024, 60, 4765-4768. (Open Access)
Selected as Outside Front Cover

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Visible-Light-Induced Oxidative Generation of o-Quinone Methides for Inverse-Electron-Demand [4+2] Cycloaddition Reactions

Nohara, S.; Iwai, S.; Yamaguchi, N.; Asada, Y.; Kamiyama, Y.; Tanaka, Y.; Tanaka, K.*; Hoshino, Y.*

Synlett 2023, 34, 2525–2529.

Moderately Oxidizing Thioxanthylium Organophotoredox Catalysts for Radical-Cation Diels-Alder Reactions

Tanaka, K*.; Kishimoto, M.; Tanaka, Y.; Kamiyama, Y.; Asada, Y.; Sukekawa, M.; Ohtsuka, N.; Suzuki, T.; Momiyama, N.; Honda, K; Hoshino, Y.*

J. Org. Chem. 2022, 87, 3319–3328.

Selected as Front Cover

A New Cycloaddition Profile for ortho-Quinone Methides: Photoredox-Catalyzed [6+4] Cycloadditions for Synthesis of Benzo[b]cyclopenta[e]oxepines.

Tanaka, K.*; Asada, Y.; Hoshino Y.*

Chem. Commun. 2022, 58, 2476–2479.

Selected as Back Cover

Visible-light-induced [4 + 2] cycloaddition of pentafulvenes by organic photoredox catalysis

Tanaka, K.*; Asada, Y.; Hoshino, Y.*; Honda, K*

Org. Biomol. Chem. 2020,18, 8074-8078.

Selected as Front Cover

Redox Potential Controlled Selective Oxidation of Styrenes for Regio- and Stereoselective Crossed Intermolecular [2 + 2] Cycloaddition via Organophotoredox Catalysis

Dual In Situ Generation of Aliphatic Vinyl Ethers and Electron-Deficient ortho-Quinone Methides for Inverse-Electron-Demand [4+2] Cycloaddition: A Selective One-Pot Synthesis of 3-Alkylchromanes

Tanaka, K.*; Iwama, Y.; Mami, K.; Ohtsuka, N.; Hoshino, Y.*; Honda, K.*

Org. Lett. 2020, 22, 5207−5211.

Selected as “Most Read Articles (Top 20 most downloaded articles in 1 month)

Press Release「Light shines on chemical production method」

Highlighted in Virtual Issue Organic Chemistry in Japan: A Strong Foundation and Honorable Tradition (acs.org)

Tanaka, K.; Ueno, K.; Tanaka, Y.; Ohtsuka, N. Asada, Y.; Kishimoto, M.; Sunaga, S.; Hoshino, Y.*; Honda, K.*

Synlett 2020, 52, 1197–1200.

Organophotoredox-Catalyzed Intermolecular Oxa-[4+2] Cycloaddition Reactions

Tanaka, K.; Omata, D.; Asada, Y.; Hoshino, Y.*; Honda, K.*

J. Org. Chem. 2019, 84, 10669−10678.

Selected as Supplementary Cover

Press Release「Let there be light: Synthesizing organic compounds」

Access to Electron-Deficient 2,2-Disubstituted Chromanes: A Highly Regioselective One-Pot Synthesis via an Inverse-Electron-Demand [4 + 2] Cycloaddition of ortho-Quinone Methides

Tanaka, K.; Kishimoto, M.; Asada, Y.; Hoshino, Y.*; Honda, K.*
J. Org. Chem. 2019, 84, 13858−13870.

Friedel–Crafts approach to the one-pot synthesis of methoxy-substituted thioxanthylium salts

Tanaka, K.; Tanaka, Y.; Kishimoto, M; Hoshino, Y.*; Honda, K.*
Beilistein J. Org. Chem. 2019, 15, 2105-2112.

A Flow Microreactor Approach to a Highly Efficient Diels–Alder Reaction with an Electrogenerated o-Quinone

Tanaka, K.; Yoshizawa, H.; Atobe, M.*
Synlett 2019, 30, 1194-1198.

CsF-Promoted Desilylation and Ring-Contraction Reaction of Electron-Deficient 3-Silyl-2H-chromenes to 2-Benzylbenzofurans

Tanaka, K.; Sukekawa, M.; Kishimoto, M.; Hoshino, Y.; Honda, K.*

Heterocycles 2019, 99, 145-170.

Green-light-driven thioxanthylium-based organophotoredox catalysts: Organophotoredox promoted radical cation Diels-Alder reaction

Tanaka, K.; Kishimoto, M.; Sukekawa, M.; Hoshino, Y.*; Honda, K.*

Tetrahedron Lett. 2018, 59, 3361-3364. 

Highlighted:「新しい合成：シクロヘキセン類」有機合成化学協会誌, 2019, 3月

Temperature-controlled divergent synthesis of 4-alkoxy- or 4-alkenyl-chromanes via inverse electron-demand cycloaddition with in situ generated ortho-quinone methides

Tanaka, K.; Kishimoto, M.; Hoshino, Y.*; Honda, K.*

Tetrahedron Lett. 2018, 5, 1841-1845.

A direct oxidative esterification of aldehydes with alcohols mediated by photochemical C–H bromination

Ando, H.; Kodaki, S.; Takamura, H.; Kadota, I.*; Tanaka, K.*
Org. Biomol. Chem. 2024, In press. (Open Access)

Highly regioselective synthesis of 2,3-disubstituted 2H-1-benzopyrans: Brønsted acid catalyzed [4+2] cycloaddition reaction with a variety of arylalkynes via ortho-quinone methides

Tanaka, K.; Shigematsu, Y.; Sukekawa, M.; Hoshino, Y.; Honda, K.*

Tetrahedron 2017, 73, 6456-6464.

A novel synthesis of polysubstituted chromenes from various salicylaldehydes and alkynes under mild conditions

Tanaka, K.; Hoshino, Y.; Honda, K.*

Tetrahedron Lett. 2016, 57, 2448-2450.

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