Junji Ichikawa

6.8k citations

208 papers · 5.6k · 1 hit paper · h-index 38

Impact in

Pharmaceutical Science top 0.02%
- Fluorine in Organic Chemistry
Organic Chemistry top 0.2%
- Catalytic C–H Functionalization Methods
- Cyclopropane Reaction Mechanisms
- Radical Photochemical Reactions
- Catalytic Cross-Coupling Reactions
- Synthesis and Reactions of Organic Compounds
- Asymmetric Synthesis and Catalysis

Papers in

Organic Chemistry 173
- Cyclopropane Reaction Mechanisms 45
- Synthesis and Reactions of Organic Compounds 41
- Catalytic C–H Functionalization Methods 32
- Synthesis and Biological Evaluation 30
- Catalytic Cross-Coupling Reactions 19
- Asymmetric Synthesis and Catalysis 18
Pharmaceutical Science 143
- Fluorine in Organic Chemistry 143

Co-authors: Kohei Fuchibe (52 shared papers)Takeshi Fujita (45 shared papers)Toru Minami (28 shared papers)Tomohiro Ichitsuka (11 shared papers)Misaki Yokota (12 shared papers)Yukinori Wada (13 shared papers)Masaki Fujiwara (12 shared papers)Kotaro Sakoda (10 shared papers)
Journals: Chemistry Letters (33 papers)Organic Letters (25 papers)Synthesis (13 papers)Chemical Communications (11 papers)Tetrahedron Letters (10 papers)
Partner nations: Japan United States Switzerland

In The Last Decade

Junji Ichikawa

196 papers receiving 5.5k citations

Junji Ichikawa's Hit Papers

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Transition‐Metal‐Mediated and ‐Catalyzed C−F Bond Activation by Fluorine Elimination 2018 · 446 citations

Peers

Countries citing papers authored by Junji Ichikawa

Since Specialization

Citations

This map shows the geographic impact of Junji Ichikawa's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Junji Ichikawa with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Junji Ichikawa more than expected).

Fields of papers citing papers by Junji Ichikawa

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Junji Ichikawa. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Junji Ichikawa. The network helps show where Junji Ichikawa may publish in the future.

Co-authors

The 25 scholars most cited alongside Junji Ichikawa, linked wherever they have co-authored with each other. Click a name or a connecting line to browse the papers they share.

Border = papers with Junji Ichikawa Line = papers co-authored together Junji Ichikawa links everyone, so they are left out of the graph.

All Works

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20 of 20 papers shown

Showing the 20 most-cited of 208 papers — load more, or switch the sort, to bring in the rest.

#	Work
1	Transition‐Metal‐Mediated and ‐Catalyzed C−F Bond Activation by Fluorine Elimination Angewandte Chemie International Edition ·Takeshi Fujita, Kohei Fuchibe, Junji Ichikawa Hit paper breakdown →	2018	446
2	Nickel-Catalyzed Allylic C(sp³)–F Bond Activation of Trifluoromethyl Groups via β-Fluorine Elimination: Synthesis of Difluoro-1,4-dienes ACS Catalysis ·Tomohiro Ichitsuka, Takeshi Fujita, Junji Ichikawa	2015	182
3	Substitution of Two Fluorine Atoms in a Trifluoromethyl Group: Regioselective Synthesis of 3‐Fluoropyrazoles Angewandte Chemie International Edition ·Kohei Fuchibe, Masaki Takahashi, Junji Ichikawa	2012	173
4	Lewis Acid Promoted Single C–F Bond Activation of the CF₃ Group: S_N1′‐Type 3,3‐Difluoroallylation of Arenes with 2‐Trifluoromethyl‐1‐alkenes Angewandte Chemie International Edition ·Kohei Fuchibe, Hibiki Hatta, Ken Oh, Rie Oki, Junji Ichikawa	2017	161
5	Double CF Bond Activation through β‐Fluorine Elimination: Nickel‐Mediated [3+2] Cycloaddition of 2‐Trifluoromethyl‐1‐alkenes with Alkynes Angewandte Chemie International Edition ·Tomohiro Ichitsuka, Takeshi Fujita, Tomohiro Arita, Junji Ichikawa	2014	152
6	Efficient Helicene Synthesis: Friedel–Crafts‐type Cyclization of 1,1‐Difluoro‐1‐alkenes Angewandte Chemie International Edition ·Junji Ichikawa, Misaki Yokota, Takao Kudo, Satoshi Umezaki	2008	150
7	5-endo Heck-type cyclization of 2-(trifluoromethyl)allyl ketone oximes: synthesis of 4-difluoromethylene-substituted 1-pyrrolines Chemical Communications ·Junji Ichikawa, Ryo Nadano, Naotaka Ito	2006	112
8	1-Trifluoromethylvinylsilane as a CF₂C^-−CH₂⁺ Synthon: Synthesis of Functionalized 1,1-Difluoro-1-alkenes via Isolable 2,2-Difluorovinylsilanes The Journal of Organic Chemistry ·Junji Ichikawa, Hiroki Fukui, Yuichiro Ishibashi	2003	103
9	gem-Difluoroolefin synthesis: general methods via thermostable difluorovinylmetals starting from 2,2,2-trifluoroethanol derivatives Journal of Fluorine Chemistry ·Junji Ichikawa	2000	91
10	The Nucleophilic 5-endo-trig Cyclization of 1,1-Difluoro-1-alkenes: Ring-Fluorinated Hetero- and Carbocycle Synthesis and Remarkable Effect of the Vinylic Fluorines on the Disfavored Process Synthesis ·Junji Ichikawa, Yukinori Wada, Masaki Fujiwara, Kotaro Sakoda	2002	88
11	Activation of 1,1-Difluoro-1-alkenes with a Transition-Metal Complex: Palladium(II)-Catalyzed Friedel–Crafts-Type Cyclization of 4,4-(Difluorohomoallyl)arenes Organic Letters ·Misaki Yokota, Daishi Fujita, Junji Ichikawa	2007	83
12	Domino Synthesis of Fluorine‐Substituted Polycyclic Aromatic Hydrocarbons: 1,1‐Difluoroallenes as Synthetic Platforms Angewandte Chemie International Edition ·Kohei Fuchibe, Yuka Mayumi, Nan Zhao, Shumpei Watanabe, Misaki Yokota, Junji Ichikawa	2013	80
13	Ring-Fluorinated Isoquinoline and Quinoline Synthesis: Intramolecular Cyclization of o-Cyano- and o-Isocyano-β,β-difluorostyrenes Organic Letters ·Junji Ichikawa, Yukinori Wada, Hiroyuki Miyazaki, Takashi Mori, Hiroyuki Kuroki	2003	78
14	Heck-type 5-endo-trig cyclization promoted by vinylic fluorines: synthesis of 5-fluoro-3H-pyrroles Chemical Communications ·Kotaro Sakoda, Jun Mihara, Junji Ichikawa	2005	74
15	Übergangsmetallvermittelte und ‐katalysierte C‐F‐Bindungsaktivierung durch Fluoreliminierung Angewandte Chemie ·Takeshi Fujita, Kohei Fuchibe, Junji Ichikawa	2018	71
16	Domino C–F Bond Activation of the CF₃ Group: Synthesis of Fluorinated Dibenzo[a,c][7]annulenes from 2-(Trifluoromethyl)-1-alkenes and 2,2′-Diceriobiaryls Organic Letters ·Takeshi Fujita, Marina Takazawa, Kazuki Sugiyama, Naoto Suzuki, Junji Ichikawa	2017	70
17	Fluorine-Directed Nazarov Cyclizations: A Controlled Synthesis of Cross-Conjugated 2-Cyclopenten-1-ones The Journal of Organic Chemistry ·Junji Ichikawa, Shinji Miyazaki, Masaki Fujiwara, Toru Minami	1995	69
18	5-endo-Trigonal cyclization of o-substituted gem-difluorostyrenes: syntheses of 2-fluorinated indoles, benzo[b]furans and benzo[b]thiophenes Chemical Communications ·Junji Ichikawa, Yukinori Wada, Tatsuo Okauchi, Toru Minami	1997	67
19	Domino Friedel–Crafts‐Type Cyclizations of Difluoroalkenes Promoted by the α‐Cation‐Stabilizing Effect of Fluorine: An Efficient Method for Synthesizing Angular PAHs Chemistry - A European Journal ·Kohei Fuchibe, Hideharu Jyono, Masaki Fujiwara, Takao Kudo, Misaki Yokota, Junji Ichikawa	2011	65
20	Illusory Molecular Expression of “Penrose Stairs” by an Aromatic Hydrocarbon Angewandte Chemie International Edition ·Waka Nakanishi, Taisuke Matsuno, Junji Ichikawa, Hiroyuki Isobe	2011	64

About Junji Ichikawa

Junji Ichikawa is a scholar working on Organic Chemistry, Pharmaceutical Science, Inorganic Chemistry, Molecular Biology and Materials Chemistry, having authored 208 papers that have together received 5.6k indexed citations. Recurring topics across this work include Fluorine in Organic Chemistry (143 papers), Cyclopropane Reaction Mechanisms (45 papers), Synthesis and Reactions of Organic Compounds (41 papers), Catalytic C–H Functionalization Methods (32 papers), Synthesis and Biological Evaluation (30 papers), Inorganic Fluorides and Related Compounds (20 papers), Catalytic Cross-Coupling Reactions (19 papers) and Asymmetric Synthesis and Catalysis (18 papers). The work is most often cited by research in Pharmaceutical Science (3.8k citations), Organic Chemistry (4.7k citations), Inorganic Chemistry (1.3k citations), Process Chemistry and Technology (194 citations) and Spectroscopy (135 citations). Junji Ichikawa has collaborated with scholars based in Japan, United States and Switzerland. Frequent co-authors include Kohei Fuchibe, Takeshi Fujita, Toru Minami, Tomohiro Ichitsuka, Misaki Yokota, Yukinori Wada, Masaki Fujiwara, Kotaro Sakoda, Tatsuo Okauchi and Ryo Nadano. Their work appears in journals such as Chemistry Letters, Organic Letters, Synthesis, Chemical Communications and Tetrahedron Letters.

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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