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D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Chemistry 68 6726 6095 438 411 361 12513

Hironao Sajiki publications per year

The chart shows the history of publications by Hironao Sajiki between 1984 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Hironao Sajiki published across 42 years, from 1984 to 2025, averaging 9 papers a year. Output peaked at 21 publications in 2015. 18 of the 379 publications appeared in the last two years.

No. of publications
5 10 15 20
Bar chart. Horizontal axis: year, 1984 to 2025. Vertical axis: number of publications, 0 to 21. Peak 21 publications in 2015. 1984: 2 publications 1985: 1 publication 1986: 4 publications 1987: 0 publications 1988: 0 publications 1989: 3 publications 1990: 7 publications 1991: 0 publications 1992: 0 publications 1993: 0 publications 1994: 0 publications 1995: 1 publication 1996: 8 publications 1997: 10 publications 1998: 11 publications 1999: 5 publications 2000: 8 publications 2001: 5 publications 2002: 7 publications 2003: 17 publications 2004: 7 publications 2005: 11 publications 2006: 13 publications 2007: 14 publications 2008: 17 publications 2009: 19 publications 2010: 16 publications 2011: 8 publications 2012: 18 publications 2013: 13 publications 2014: 13 publications 2015: 21 publications 2016: 10 publications 2017: 13 publications 2018: 11 publications 2019: 18 publications 2020: 19 publications 2021: 10 publications 2022: 9 publications 2023: 12 publications 2024: 10 publications 2025: 8 publications
1984 2025

379 publications in total across all disciplines

View publications per year as a table
Hironao Sajiki: publications per year, 1984 to 2025
Year Publications
1984 2
1985 1
1986 4
1987 0
1988 0
1989 3
1990 7
1991 0
1992 0
1993 0
1994 0
1995 1
1996 8
1997 10
1998 11
1999 5
2000 8
2001 5
2002 7
2003 17
2004 7
2005 11
2006 13
2007 14
2008 17
2009 19
2010 16
2011 8
2012 18
2013 13
2014 13
2015 21
2016 10
2017 13
2018 11
2019 18
2020 19
2021 10
2022 9
2023 12
2024 10
2025 8
Total 379
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Hironao Sajiki 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 Hironao Sajiki 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, 361–380 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: 361 publications — 75th percentile

75% 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
361–380 522 361
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
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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Hironao Sajiki 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 Hironao Sajiki 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, 68–69 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: 68 D-Index — 64th percentile

64% 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 68
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
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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Overview

Hironao Sajiki is affiliated with Gifu Pharmaceutical University in Japan and has contributed extensively to the field of chemistry, with a focus on organic chemistry. Their research encompasses a wide array of topics including asymmetric hydrogenation and catalysis, chemical reactions and isotopes, and catalytic C-H functionalization methods.

Their work spans multiple subfields of study such as organic chemistry, inorganic chemistry, biomedical engineering, pharmaceutical science, and spectroscopy. This multidisciplinary approach is reflected in their frequent publications within well-known academic venues.

Some of the recent papers authored or co-authored by Hironao Sajiki include:

  • "Aryl Boronic Esters Are Stable on Silica Gel and Reactive under Suzuki-Miyaura Coupling Conditions", 2022, Organic Letters
  • "Skeletal reorganization divergence of N-sulfonyl ynamides", 2020, Nature Communications
  • "Facile Hydrogenative Deprotection of N-Benzyl Groups Using a Mixed Catalyst of Palladium and Niobic Acid-on-Carbon", 2020, ACS Omega
  • "Gold-Catalyzed Cyclization of 2-Alkynylaldehyde Cyclic Acetals via Hydride Shift for the Synthesis of Indenone Derivatives", 2020, Organic Letters
  • "Multicomponent double Mannich alkylamination involving C(sp2)-H and benzylic C(sp3)-H bonds", 2022, Nature Communications

Hironao Sajiki frequently collaborates with several researchers, including:

  • Tsuyoshi Yamada
  • Yoshinari Sawama
  • Takashi Ikawa
  • Kwihwan Park
  • Shuji Akai

The scientist's publications are found prominently in the following academic journals:

  • ChemSusChem
  • Bulletin of the Chemical Society of Japan
  • Advanced Synthesis & Catalysis
  • Asian Journal of Organic Chemistry
  • Organic Letters

The main fields of study in which Hironao Sajiki is involved include chemistry, with a substantial number of publications devoted to organic chemistry. Their research covers diverse topics related to catalytic and synthetic methodologies and extends to applied pharmaceutical sciences and biomedical engineering.

The principal research topics associated with Hironao Sajiki's work are:

  • Asymmetric Hydrogenation and Catalysis
  • Chemical Reactions and Isotopes
  • Catalytic C-H Functionalization Methods
  • Innovative Microfluidic and Catalytic Techniques Innovation
  • Nanomaterials for catalytic reactions
  • Catalytic Alkyne Reactions
  • Mass Spectrometry Techniques and Applications

Best Publications

  • Heavy hydrogenation method of heterocyclic rings

    Nobuhiro Ito;Tsuneaki Maesawa;Kazushige Muto;Kosaku Hirota

  • Heterogeneous Pd/C-catalyzed ligand-free, room-temperature Suzuki-Miyaura coupling reactions in aqueous media.

    Tomohiro Maegawa;Yoshiaki Kitamura;Satoko Sako;Takahiro Udzu

  • The Formation of a Novel Pd/C-Ethylenediamine Complex Catalyst : Chemoselective Hydrogenation without Deprotection of the O-Benzyl and N-Cbz Groups.

    Hironao Sajiki;Kazuyuki Hattori;Kosaku Hirota

  • A novel type of hydrogenation using a catalyst poison: Chemoselective inhibition of the hydrogenolysis for O-benzyl protective group by the addition of a nitrogen-containing base

    Hironao Sajiki;Kosaku Hirota

  • Selective Inhibition of Benzyl Ether Hydrogenolysis with Pd/C Due to the Presence of Ammonia, Pyridine or Ammonium Acetate.

    Hironao Sajiki

  • Pd/C-catalyzed chemoselective hydrogenation in the presence of diphenylsulfide.

    Akinori Mori;Yumi Miyakawa;Eri Ohashi;Tomoko Haga

  • Efficient and Practical Arene Hydrogenation by Heterogeneous Catalysts under Mild Conditions

    Tomohiro Maegawa;Akira Akashi;Kiichiro Yaguchi;Yohei Iwasaki

  • Synthesis and evaluation of 2-substituted 8-hydroxyadenines as potent interferon inducers with improved oral bioavailabilities

    Ayumu Kurimoto;Tetsuhiro Ogino;Shinji Ichii;Yoshiaki Isobe

  • MS-325: a small-molecule vascular imaging agent for magnetic resonance imaging.

    Randall B. Lauffer;David J. Parmelee;Huillori S. Ouellet;Robert P. Dolan

  • Chemoselective control of hydrogenation among aromatic carbonyl and benzyl alcohol derivatives using Pd/C(en) catalyst

    Kazuyuki Hattori;Hironao Sajiki;Kosaku Hirota

  • Highly chemoselective hydrogenation method using novel finely dispersed palladium catalyst on silk-fibroin: its preparation and activity

    Takashi Ikawa;Hironao Sajiki;Kosaku Hirota

  • Discovery of 8-hydroxyadenines as a novel type of interferon inducer.

    Kosaku Hirota;Kazunori Kazaoka;Itaru Niimoto;Hiroshi Kumihara

  • Cover Picture: Continuous‐Flow Suzuki‐Miyaura and Mizoroki‐Heck Reactions under Microwave Heating Conditions (Chem. Rec. 1/2019)

    Yasunari Monguchi;Yasunari Monguchi;Tomohiro Ichikawa;Tsuyoshi Yamada;Yoshinari Sawama

  • Efficient C-H/C-D exchange reaction on the alkyl side chain of aromatic compounds using heterogeneous Pd/C in D2O.

    Hironao Sajiki;Fumiyo Aoki;Hiroyoshi Esaki;Tomohiro Maegawa

  • Mild and general procedure for Pd/C-catalyzed hydrodechlorination of aromatic chlorides

    Hironao Sajiki;Akira Kume;Kazuyuki Hattori;Kosaku Hirota

  • Reductive and catalytic monoalkylation of primary amines using nitriles as an alkylating reagent.

    Hironao Sajiki;Takashi Ikawa;Kosaku Hirota

  • Ligand-free Pd/C-catalyzed Suzuki–Miyaura coupling reaction for the synthesis of heterobiaryl derivatives

    Yoshiaki Kitamura;Satoko Sako;Takahiro Udzu;Azusa Tsutsui

  • Aromatic ring favorable and efficient H-D exchange reaction catalyzed by Pt/C

    Hironao Sajiki;Nobuhiro Ito;Hiroyoshi Esaki;Tsuneaki Maesawa

  • Efficient H–D Exchange Reactions Using Heterogeneous Platinum-Group Metal on Carbon–H2–D2O System

    Yoshinari Sawama;Yasunari Monguchi;Hironao Sajiki

  • Chemoselective hydrogenation method catalyzed by Pd/C using diphenylsulfide as a reasonable catalyst poison

    Akinori Mori;Tomoteru Mizusaki;Yumi Miyakawa;Eri Ohashi

  • Effect of an Inducer of BiP, a Molecular Chaperone, on Endoplasmic Reticulum (ER) Stress-Induced Retinal Cell Death

    Yuta Inokuchi;Yoshimi Nakajima;Masamitsu Shimazawa;Takanori Kurita

Frequent Co-Authors

Yasunari Monguchi
Yasunari Monguchi Gifu Pharmaceutical University
Yasuyuki Kita
Yasuyuki Kita Ritsumeikan University
Norbert Krause
Norbert Krause TU Dortmund University
Toshifumi Dohi
Toshifumi Dohi Ritsumeikan University
Yoshitaka Hamashima
Yoshitaka Hamashima University of Shizuoka
Hideaki Hara
Hideaki Hara Gifu Pharmaceutical University
Masamitsu Shimazawa
Masamitsu Shimazawa Gifu Pharmaceutical University
Yasunori Oumi
Yasunori Oumi Gifu University
Kazunori Imaizumi
Kazunori Imaizumi Hiroshima University
Munekazu Iinuma
Munekazu Iinuma Gifu Pharmaceutical University

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