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Keiji Maruoka

Keiji Maruoka

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Chemistry
Japan
2026

D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Chemistry 105 1005 885 46 44 946 39429

Keiji Maruoka publications per year

The chart shows the history of publications by Keiji Maruoka between 1979 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Keiji Maruoka published across 47 years, from 1979 to 2025, averaging 20.9 papers a year. Output peaked at 89 publications in 2012. 21 of the 983 publications appeared in the last two years.

No. of publications
20 40 60 80
Bar chart. Horizontal axis: year, 1979 to 2025. Vertical axis: number of publications, 0 to 89. Peak 89 publications in 2012. 1979: 1 publication 1980: 1 publication 1981: 4 publications 1982: 4 publications 1983: 11 publications 1984: 9 publications 1985: 14 publications 1986: 9 publications 1987: 5 publications 1988: 18 publications 1989: 12 publications 1990: 14 publications 1991: 16 publications 1992: 17 publications 1993: 18 publications 1994: 24 publications 1995: 10 publications 1996: 5 publications 1997: 17 publications 1998: 18 publications 1999: 15 publications 2000: 21 publications 2001: 34 publications 2002: 15 publications 2003: 41 publications 2004: 75 publications 2005: 22 publications 2006: 31 publications 2007: 30 publications 2008: 41 publications 2009: 39 publications 2010: 31 publications 2011: 30 publications 2012: 89 publications 2013: 30 publications 2014: 25 publications 2015: 19 publications 2016: 15 publications 2017: 20 publications 2018: 14 publications 2019: 22 publications 2020: 24 publications 2021: 20 publications 2022: 15 publications 2023: 17 publications 2024: 18 publications 2025: 3 publications
1979 2025

983 publications in total across all disciplines

View publications per year as a table
Keiji Maruoka: publications per year, 1979 to 2025
Year Publications
1979 1
1980 1
1981 4
1982 4
1983 11
1984 9
1985 14
1986 9
1987 5
1988 18
1989 12
1990 14
1991 16
1992 17
1993 18
1994 24
1995 10
1996 5
1997 17
1998 18
1999 15
2000 21
2001 34
2002 15
2003 41
2004 75
2005 22
2006 31
2007 30
2008 41
2009 39
2010 31
2011 30
2012 89
2013 30
2014 25
2015 19
2016 15
2017 20
2018 14
2019 22
2020 24
2021 20
2022 15
2023 17
2024 18
2025 3
Total 983
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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.

No. of scientists
250 500 750 1,000 1,250
Bar chart with 63 bars. Horizontal axis: publications, 61–80 to 1,295+. Vertical axis: number of scientists, 0 to 1,350. Most scientists, 1,350, have 161–180 publications. The last bar groups every scientist with 1,295 publications or more. The highlighted bar, 941–960 publications, is where this scientist sits. 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
61–80 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.

View publications distribution as a table
Number of Chemistry scientists by publication count, Research.com 2026 ranking edition. Based on 17,934 ranked scientists.
Publications Scientists This scientist
61–80 66
81–100 302
101–120 623
121–140 918
141–160 1,218
161–180 1,350
181–200 1,344
201–220 1,281
221–240 1,216
241–260 1,100
261–280 979
281–300 939
301–320 764
321–340 643
341–360 628
361–380 522
381–400 459
401–420 397
421–440 327
441–460 270
461–480 265
481–500 252
501–520 201
521–540 185
541–560 148
561–580 148
581–600 132
601–620 114
621–640 104
641–660 91
661–680 92
681–700 73
701–720 57
721–740 54
741–760 67
761–780 45
781–800 46
801–820 39
821–840 32
841–860 36
861–880 29
881–900 26
901–920 24
921–940 14
941–960 23 946
961–980 28
981–1,000 15
1,001–1,020 29
1,021–1,040 12
1,041–1,060 19
1,061–1,080 12
1,081–1,100 6
1,101–1,120 8
1,121–1,140 12
1,141–1,160 5
1,161–1,180 6
1,181–1,200 14
1,201–1,220 7
1,221–1,240 2
1,241–1,260 6
1,261–1,280 4
1,281–1,294 6
1,295+ 100
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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.

No. of scientists
250 500 750 1,000
Bar chart with 61 bars. Horizontal axis: D-Index, 40–41 to 159+. Vertical axis: number of scientists, 0 to 1,051. Most scientists, 1,051, have 56–57 D-Index. The last bar groups every scientist with 159 D-Index or more. The highlighted bar, 104–105 D-Index, is where this scientist sits. 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
40–41 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.

View D-Index distribution as a table
Number of Chemistry scientists by D-index, Research.com 2026 ranking edition. Based on 17,934 ranked scientists.
D-Index Scientists This scientist
40–41 289
42–43 612
44–45 808
46–47 776
48–49 835
50–51 861
52–53 872
54–55 933
56–57 1,051
58–59 930
60–61 882
62–63 834
64–65 731
66–67 775
68–69 683
70–71 646
72–73 561
74–75 501
76–77 437
78–79 388
80–81 354
82–83 292
84–85 275
86–87 254
88–89 235
90–91 185
92–93 192
94–95 155
96–97 163
98–99 125
100–101 105
102–103 105
104–105 112 105
106–107 88
108–109 68
110–111 69
112–113 65
114–115 79
116–117 61
118–119 44
120–121 37
122–123 40
124–125 33
126–127 26
128–129 34
130–131 35
132–133 25
134–135 27
136–137 17
138–139 16
140–141 20
142–143 20
144–145 15
146–147 9
148–149 9
150–151 16
152–153 11
154–155 9
156–157 3
158 3
159+ 98
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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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