World's Best Scientists 2026 revealed!
Keiji Maruoka

Keiji Maruoka

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Chemistry
Japan
2026

D-Index & Metrics

Chemistry

D-Index
105
Citations
39429
World Ranking
1005
National Ranking
46

Keiji Maruoka publication distribution in Chemistry in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Chemistry in 2026. The highlighted bar marks where Keiji Maruoka sits on this spectrum.

61–80 publications: 66 scientists 81–100 publications: 302 scientists 101–120 publications: 623 scientists 121–140 publications: 918 scientists 141–160 publications: 1,218 scientists 161–180 publications: 1,350 scientists 181–200 publications: 1,344 scientists 201–220 publications: 1,281 scientists 221–240 publications: 1,216 scientists 241–260 publications: 1,100 scientists 261–280 publications: 979 scientists 281–300 publications: 939 scientists 301–320 publications: 764 scientists 321–340 publications: 643 scientists 341–360 publications: 628 scientists 361–380 publications: 522 scientists 381–400 publications: 459 scientists 401–420 publications: 397 scientists 421–440 publications: 327 scientists 441–460 publications: 270 scientists 461–480 publications: 265 scientists 481–500 publications: 252 scientists 501–520 publications: 201 scientists 521–540 publications: 185 scientists 541–560 publications: 148 scientists 561–580 publications: 148 scientists 581–600 publications: 132 scientists 601–620 publications: 114 scientists 621–640 publications: 104 scientists 641–660 publications: 91 scientists 661–680 publications: 92 scientists 681–700 publications: 73 scientists 701–720 publications: 57 scientists 721–740 publications: 54 scientists 741–760 publications: 67 scientists 761–780 publications: 45 scientists 781–800 publications: 46 scientists 801–820 publications: 39 scientists 821–840 publications: 32 scientists 841–860 publications: 36 scientists 861–880 publications: 29 scientists 881–900 publications: 26 scientists 901–920 publications: 24 scientists 921–940 publications: 14 scientists 941–960 publications: 23 scientists 961–980 publications: 28 scientists 981–1,000 publications: 15 scientists 1,001–1,020 publications: 29 scientists 1,021–1,040 publications: 12 scientists 1,041–1,060 publications: 19 scientists 1,061–1,080 publications: 12 scientists 1,081–1,100 publications: 6 scientists 1,101–1,120 publications: 8 scientists 1,121–1,140 publications: 12 scientists 1,141–1,160 publications: 5 scientists 1,161–1,180 publications: 6 scientists 1,181–1,200 publications: 14 scientists 1,201–1,220 publications: 7 scientists 1,221–1,240 publications: 2 scientists 1,241–1,260 publications: 6 scientists 1,261–1,280 publications: 4 scientists 1,281–1,294 publications: 6 scientists 1,295+ publications: 100 scientists
61 publications 1,295+

This scientist: 946 publications — 98th percentile

98% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 1,295 publications or more.

Keiji Maruoka D-index placement in Chemistry in 2026

The chart shows the D-index (discipline H-index) distribution of Chemistry scientists ranked by Research.com in 2026. The highlighted bar marks where Keiji Maruoka sits on this spectrum.

40–41 D-Index: 289 scientists 42–43 D-Index: 612 scientists 44–45 D-Index: 808 scientists 46–47 D-Index: 776 scientists 48–49 D-Index: 835 scientists 50–51 D-Index: 861 scientists 52–53 D-Index: 872 scientists 54–55 D-Index: 933 scientists 56–57 D-Index: 1,051 scientists 58–59 D-Index: 930 scientists 60–61 D-Index: 882 scientists 62–63 D-Index: 834 scientists 64–65 D-Index: 731 scientists 66–67 D-Index: 775 scientists 68–69 D-Index: 683 scientists 70–71 D-Index: 646 scientists 72–73 D-Index: 561 scientists 74–75 D-Index: 501 scientists 76–77 D-Index: 437 scientists 78–79 D-Index: 388 scientists 80–81 D-Index: 354 scientists 82–83 D-Index: 292 scientists 84–85 D-Index: 275 scientists 86–87 D-Index: 254 scientists 88–89 D-Index: 235 scientists 90–91 D-Index: 185 scientists 92–93 D-Index: 192 scientists 94–95 D-Index: 155 scientists 96–97 D-Index: 163 scientists 98–99 D-Index: 125 scientists 100–101 D-Index: 105 scientists 102–103 D-Index: 105 scientists 104–105 D-Index: 112 scientists 106–107 D-Index: 88 scientists 108–109 D-Index: 68 scientists 110–111 D-Index: 69 scientists 112–113 D-Index: 65 scientists 114–115 D-Index: 79 scientists 116–117 D-Index: 61 scientists 118–119 D-Index: 44 scientists 120–121 D-Index: 37 scientists 122–123 D-Index: 40 scientists 124–125 D-Index: 33 scientists 126–127 D-Index: 26 scientists 128–129 D-Index: 34 scientists 130–131 D-Index: 35 scientists 132–133 D-Index: 25 scientists 134–135 D-Index: 27 scientists 136–137 D-Index: 17 scientists 138–139 D-Index: 16 scientists 140–141 D-Index: 20 scientists 142–143 D-Index: 20 scientists 144–145 D-Index: 15 scientists 146–147 D-Index: 9 scientists 148–149 D-Index: 9 scientists 150–151 D-Index: 16 scientists 152–153 D-Index: 11 scientists 154–155 D-Index: 9 scientists 156–157 D-Index: 3 scientists 158 D-Index: 3 scientists 159+ D-Index: 98 scientists
40 D-Index 159+

This scientist: 105 D-Index — 95th percentile

95% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 159 D-Index or more.

Research.com Recognitions

  • 2026 - Research.com Chemistry in Japan Leader Award
  • 2025 - Research.com Chemistry in Japan Leader Award
  • 2022 - Research.com Chemistry in Japan Leader Award
  • 2016 - Ryoji Noyori Prize, Society of Synthetic Organic Chemistry

Overview

Keiji Maruoka is affiliated with Kyoto University in Japan and has contributed extensively to the field of chemistry, with a primary focus on organic chemistry and related subfields. Their research spans a range of topics that include catalytic C-H functionalization methods, radical photochemical reactions, oxidative organic chemistry reactions, asymmetric synthesis and catalysis, sulfur-based synthesis techniques, synthesis and catalytic reactions, and chemical synthesis and analysis.

Maruoka's publication record includes papers in prominent scientific journals. Notable recent works include:

  • "Cu-Catalyzed Enantioselective Alkylarylation of Vinylarenes Enabled by Chiral Binaphthyl-BOX Hybrid Ligands" (2020, Journal of the American Chemical Society)
  • "Organocatalytic Formal (3 + 2) Cycloaddition toward Chiral Pyrrolo[1,2-a]indoles via Dynamic Kinetic Resolution of Allene Intermediates" (2020, Organic Letters)
  • "Cationic DABCO-Based Catalyst for Site-Selective C-H Alkylation via Photoinduced Hydrogen-Atom Transfer" (2022, ACS Catalysis)
  • "Practical Asymmetric Synthesis of Chiral Sulfoximines via Sulfur-Selective Alkylation" (2022, The Journal of Organic Chemistry)
  • "Asymmetric phase-transfer catalysis" (2024, Nature Reviews Chemistry)

The scientist collaborates frequently with several other researchers, including:

  • Taichi Kano
  • Terumasa Kato
  • Yan Liu
  • Akira Matsumoto
  • Hyo-Jun Lee

Maruoka has published multiple papers in the following scientific venues:

  • The Cambridge Structural Database
  • Organic Letters
  • Asian Journal of Organic Chemistry
  • The Journal of Organic Chemistry
  • Tetrahedron Letters

Their body of work primarily focuses on the main field of chemistry with particular emphasis on organic chemistry. Subfields include materials chemistry, molecular biology, inorganic chemistry, and pharmaceutical science. Maruoka's research interests also extend into specialized areas such as catalytic C-H functionalization, radical photochemical reactions, and asymmetric catalysis.

In recognition of research contributions, Maruoka was awarded the Ryoji Noyori Prize by the Society of Synthetic Organic Chemistry in 2016.

Best Publications

  • Recent Advances of Catalytic Asymmetric 1,3-Dipolar Cycloadditions

    Takuya Hashimoto;Keiji Maruoka

  • Enantioselective amino acid synthesis by chiral phase-transfer catalysis.

    Keiji Maruoka;Takashi Ooi

  • Recent advances in asymmetric phase-transfer catalysis.

    Takashi Ooi;Keiji Maruoka

  • Recent development and application of chiral phase-transfer catalysts.

    Takuya Hashimoto;Keiji Maruoka

  • Recent Developments in Asymmetric Phase-Transfer Reactions

    Seiji Shirakawa;Keiji Maruoka

  • Molecular Design of a C2-Symmetric Chiral Phase-Transfer Catalyst for Practical Asymmetric Synthesis of α-Amino Acids

    Takashi Ooi;and Minoru Kameda;Keiji Maruoka

  • Design of N-Spiro C2-Symmetric Chiral Quaternary Ammonium Bromides as Novel Chiral Phase-Transfer Catalysts: Synthesis and Application to Practical Asymmetric Synthesis of α-Amino Acids

    Takashi Ooi;Minoru Kameda;Keiji Maruoka

  • Practical Catalytic Enantioselective Synthesis of α,α-Dialkyl-α-amino Acids by Chiral Phase-Transfer Catalysis

    Takashi Ooi;Mifune Takeuchi;and Minoru Kameda;Keiji Maruoka

  • Asymmetric hetero-Diels-Alder reaction catalyzed by a chiral organoaluminum reagent

    Keiji. Maruoka;Takayuki. Itoh;Tadashi. Shirasaka;Hisashi. Yamamoto

  • Practical Aspects of Recent Asymmetric Phase-Transfer Catalysis

    Keiji Maruoka

  • Phosphonium Salts as Chiral Phase‐Transfer Catalysts: Asymmetric Michael and Mannich Reactions of 3‐Aryloxindoles

    Rongjun He;Changhua Ding;Keiji Maruoka

  • Organoaluminum-promoted Beckmann rearrangement of oxime sulfonates

    Keiji Maruoka;Tohru Miyazaki;Mamoru Ando;Yasushi Matsumura

  • Design of axially chiral dicarboxylic acid for asymmetric Mannich reaction of arylaldehyde N-Boc imines and diazo compounds.

    Takuya Hashimoto;Keiji Maruoka

  • Powerful Chiral Phase-Transfer Catalysts for the Asymmetric Synthesis of α-Alkyl- and α,α-Dialkyl-α-amino Acids

    Masanori Kitamura;Seiji Shirakawa;Keiji Maruoka

  • Anti-Selective Direct Asymmetric Mannich Reactions Catalyzed by Axially Chiral Amino Sulfonamide as an Organocatalyst

    Taichi Kano;Yukako Yamaguchi;Osamu Tokuda;Keiji Maruoka

  • Bis(((S)-binaphthoxy)(isopropoxy)titanium) oxide as a mu-oxo-type chiral Lewis acid: application to catalytic asymmetric allylation of aldehydes.

    Hideo Hanawa;Takuya Hashimoto;Keiji Maruoka

  • Enantioselective acylation of secondary alcohols catalyzed by chiral N-heterocyclic carbenes.

    Taichi Kano;Kouji Sasaki;Keiji Maruoka

  • Design of New Chiral Phase-Transfer Catalysts with Dual Functions for Highly Enantioselective Epoxidation of α,β-Unsaturated Ketones

    Takashi Ooi;Daisuke Ohara;Masazumi Tamura;Keiji Maruoka

  • Fortschritte bei asymmetrischen Phasentransferkatalysen

    Takashi Ooi;Takashi Ooi;Keiji Maruoka

  • Asymmetric organocatalysis of structurally well-defined chiral quaternary ammonium fluorides

    Takashi Ooi;Keiji Maruoka

Frequent Co-Authors

Takashi Ooi
Takashi Ooi Nagoya University
Seiji Shirakawa
Seiji Shirakawa Nagasaki University
Hisashi Yamamoto
Hisashi Yamamoto Chubu University
Tomoya Miura
Tomoya Miura Kyoto University
Xi-Sheng Wang
Xi-Sheng Wang University of Science and Technology of China
Naoki Asao
Naoki Asao Shinshu University
Susumu Saito
Susumu Saito Nagoya University
Benjamin List
Benjamin List Max Planck Society
Atsunori Mori
Atsunori Mori Kobe University
André Luxen
André Luxen University of Liège

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