Faculty Profiles - EMA Tadashi

Papers - EMA Tadashi

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Pyrene-Fused Azahelicene Showing Circularly Polarized Luminescence Invited Reviewed

Chihiro Maeda, Yukino Daigen, Sayaka Michishita, Tadashi Ema

Organic Letters 27 ( 25 ) 6648 - 6653 2025.6

Synthesis of Isocoumarins via Light‐Driven Carboxylative Cyclization Reaction of o‐Ethynyl Aryl Bromides with CO₂ Invited Reviewed

Chihiro Maeda, Rio Tanaka, Nanaka Higuchi, Shunsuke Kiguchi, Tadashi Ema

Chemistry – A European Journal 31 ( 34 ) e202500563 2025.6

Authorship：Last author,　Corresponding author Language：English Publishing type：Research paper (scientific journal)

<jats:title>Abstract</jats:title><jats:p>Isocoumarins are an important class of bicyclic lactones, which are seen in natural products, drugs, and bioactive compounds, and a variety of synthetic methods for isocoumarins have been developed. However, the synthesis of isocoumarins via the catalytic CO<jats:sub>2</jats:sub> fixation has been scarcely reported despite the potential incorporation of CO<jats:sub>2</jats:sub> into the lactone moiety. Here, we developed the light‐driven carboxylative cyclization reaction of <jats:italic>o</jats:italic>‐ethynyl aryl bromides with CO<jats:sub>2</jats:sub>, which selectively produced isocoumarins. Control experiments revealed that photoirradiation promoted the cyclization process with high selectivity.</jats:p>

DOI： 10.1002/chem.202500563

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Terpolymerization of Oxetane, CO2, and Isothiocyanates with Bifunctional Catalysts: Synthesis and Degradability of Poly(thioimidocarbonate-trimethylene carbonate)s Reviewed

Io Yamamoto, Satoshi Muranaka, Keiichi Hirose, Tadashi Ema

ACS Applied Polymer Materials 7 ( 8 ) 5116 - 5126 2025.4

Deoxygenative dual CO2 conversions: methylenation and switchable N-formylation/N-methylation of tryptamines Reviewed

Kazuto Takaishi, Hajime Morishita, Kosuke Iwaki, Tadashi Ema

Green Chemistry 27 ( 18 ) 5359 - 5365 2025.4

A Binaphthyl Macrocycle Exhibiting Circularly Polarized Luminescence: On–off Switch Triggered by Molecular Recognition Reviewed

Kazuto Takaishi, Itsuki Taniuchi, Sho Miyashita, Kei Yabushita, Tadashi Ema

Chemistry – A European Journal 31 ( 24 ) e202500736 2025.3

Recent development of azahelicenes showing circularly polarized luminescence Invited Reviewed

Chihiro Maeda, Tadashi Ema

Chemical Communications 61 ( 25 ) 4757 - 4773 2025.2

Synthesis and Postfunctionalization of Acrylate-Appended Poly(cyclohexene carbonate)s: Modulation of Properties of CO<inf>2</inf>-Based Polymers Reviewed

Chihiro Maeda, Hina Inoue, Tadashi Ema

Macromolecules 58 ( 3 ) 1571 - 1577 2025.2

Terpolymerization reactions of epoxides, CO<inf>2</inf>, and the third monomers toward sustainable CO<inf>2</inf>-based polymers with controllable chemical and physical properties Invited Reviewed

Koichi Nakaoka, Tadashi Ema

Chemical Communications 61 ( 1 ) 46 - 60 2025.1

Selective and Divergent Synthesis of Naphthalene- and Phenanthrene-Fused Azahelicenes by Turning Rearrangement On or Off Reviewed

Chihiro Maeda, Sayaka Michishita, Tadashi Ema

Chemistry - A European Journal 31 ( 16 ) e202404325 2025.1

B,N-Embedded Helical Nanographenes Showing an Ion-Triggered Chiroptical Switching Function Reviewed

Chihiro Maeda, Sayaka Michishita, Issa Yasutomo, Tadashi Ema

Angewandte Chemie - International Edition 2025.1

Terpolymerization of Propylene Oxide, CO<inf>2</inf>, and p-Toluenesulfonyl Isocyanate for the Synthesis of Poly(urethane-carbonate): p-Toluenesulfonyl Isocyanate Acts as a Backbiting Suppressor Reviewed

Satoshi Muranaka, Io Yamamoto, Tadashi Ema

ACS Applied Polymer Materials 6 ( 24 ) 15366 - 15374 2024.12

Cyclic Azahelicene Dimers Showing Bright Circularly Polarized Luminescence and Selective Fluoride Recognition Reviewed

Chihiro Maeda, Issa Yasutomo, Tadashi Ema

Angewandte Chemie - International Edition 63 ( 30 ) e202404149 2024.7

Temperature-Induced Sign Inversion of Circularly Polarized Luminescence of Binaphthyl-Bridged Tetrathiapyrenophanes Reviewed

Kazuto Takaishi, Fumiya Yoshinami, Yoshihiro Sato, Tadashi Ema

Chemistry - A European Journal 30 ( 32 ) e202400866 2024.6

Skeletal Formation of Carbocycles with CO<inf>2</inf>: Selective Synthesis of Indolo[3,2-b]carbazoles or Cyclophanes from Indoles, CO<inf>2</inf>, and Phenylsilane Reviewed

Sha Li, Shoko Nakahara, Taishin Adachi, Takumi Murata, Kazuto Takaishi, Tadashi Ema

Journal of the American Chemical Society 146 ( 22 ) 14935 - 14941 2024.6

Synthesis of hydroxy acids via the light-driven carboxylation of epoxides with CO<inf>2</inf> Reviewed

Chihiro Maeda, Ren Kumemoto, Rio Tanaka, Tadashi Ema

Chemistry Letters 53 ( 5 ) upae086 2024.5

Terpolymerizations of cyclohexene oxide, CO<inf>2</inf>, and isocyanates or isothiocyanates for the synthesis of poly(carbonate-urethane)s or poly(carbonate-thioimidocarbonate)s Reviewed

Koichi Nakaoka, Satoshi Muranaka, Io Yamamoto, Tadashi Ema

Polymer Chemistry 15 ( 8 ) 707 - 713 2024.1

Selective Conversions of CO<inf>2</inf> into Value-Added Chemicals via Cooperative Catalysis Using Multifunctional Catalysts Reviewed

Tadashi Ema

Bulletin of the Chemical Society of Japan 96 ( 7 ) 693 - 701 2023.7

Synthesis and Photophysical Properties of Dihetero[8]circulenes Reviewed

Chihiro Maeda, Koki Akiyama, Tadashi Ema

Organic Letters 25 ( 21 ) 3932 - 3935 2023.6

One‐Pot Synthesis of Aldehydes or Alcohols from CO 2 via Formamides or Silyl Formates Reviewed

Fan Yang, Yuta Saiki, Koichi Nakaoka, Tadashi Ema

Advanced Synthesis & Catalysis 365 ( 6 ) 877 - 883 2023.3

One-Pot Synthesis of Dihydropyrans via CO2 Reduction and Domino Knoevenagel/oxa-Diels–Alder Reactions Reviewed

Kazuto Takaishi, Ritsuki Nishimura, Yuha Toda, Hajime Morishita, Tadashi Ema

Organic Letters 25 ( 9 ) 1370 - 1374 2023.3

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