Akio Ejima

952 total citations
30 papers, 763 citations indexed

About

Akio Ejima is a scholar working on Organic Chemistry, Molecular Biology and Oncology. According to data from OpenAlex, Akio Ejima has authored 30 papers receiving a total of 763 indexed citations (citations by other indexed papers that have themselves been cited), including 20 papers in Organic Chemistry, 20 papers in Molecular Biology and 7 papers in Oncology. Recurrent topics in Akio Ejima's work include Cancer therapeutics and mechanisms (17 papers), Synthesis and biological activity (11 papers) and Synthesis and Biological Evaluation (9 papers). Akio Ejima is often cited by papers focused on Cancer therapeutics and mechanisms (17 papers), Synthesis and biological activity (11 papers) and Synthesis and Biological Evaluation (9 papers). Akio Ejima collaborates with scholars based in Japan and Germany. Akio Ejima's co-authors include Masamichi Sugimori, Hirofumi Terasawa, Satoru Ohsuki, Ikuo Mitsui, Eiji Kumazawa, Keiki Sato, Hiroaki Tagawa, Kouichi Uoto, Toshihiro Nohara and Shoji Yahara and has published in prestigious journals such as Journal of Biological Chemistry, Journal of Medicinal Chemistry and Tetrahedron Letters.

In The Last Decade

Akio Ejima

28 papers receiving 707 citations

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name h Career Trend Papers Cites
Akio Ejima Japan 17 479 313 204 113 82 30 763
Luisa Dusonchet Italy 13 651 1.4× 340 1.1× 244 1.2× 57 0.5× 97 1.2× 30 1.1k
Mansukh C. Wani United States 12 1.2k 2.4× 182 0.6× 229 1.1× 218 1.9× 144 1.8× 13 1.3k
Abdullah Al‐Dhfyan Saudi Arabia 21 455 0.9× 575 1.8× 223 1.1× 83 0.7× 64 0.8× 47 1.1k
Chi-Yen Chang Taiwan 20 599 1.3× 759 2.4× 172 0.8× 74 0.7× 96 1.2× 28 1.3k
Robert D. Sindelar United States 14 466 1.0× 203 0.6× 93 0.5× 51 0.5× 70 0.9× 35 797
Sanjeev Meena India 19 478 1.0× 283 0.9× 138 0.7× 32 0.3× 86 1.0× 35 933
B.T. Prabhakar India 22 427 0.9× 480 1.5× 193 0.9× 108 1.0× 98 1.2× 51 989
Taha F. S. Ali Egypt 19 286 0.6× 391 1.2× 91 0.4× 59 0.5× 77 0.9× 57 859
David Vásquez Chile 15 275 0.6× 232 0.7× 169 0.8× 110 1.0× 45 0.5× 36 750
Kohji Akimoto Japan 11 440 0.9× 517 1.7× 115 0.6× 56 0.5× 129 1.6× 18 1.2k

Countries citing papers authored by Akio Ejima

Since Specialization
Citations

This map shows the geographic impact of Akio Ejima'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 Akio Ejima with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Akio Ejima more than expected).

Fields of papers citing papers by Akio Ejima

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Akio Ejima. 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 Akio Ejima. The network helps show where Akio Ejima may publish in the future.

Co-authorship network of co-authors of Akio Ejima

This figure shows the co-authorship network connecting the top 25 collaborators of Akio Ejima. A scholar is included among the top collaborators of Akio Ejima based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Akio Ejima. Akio Ejima is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
Chiba, Jun, Nobuo Machinaga, Tohru Takashi, et al.. (2004). Identified a morpholinyl-4-piperidinylacetic acid derivative as a potent oral active VLA-4 antagonist. Bioorganic & Medicinal Chemistry Letters. 15(1). 41–45. 20 indexed citations
2.
Ohki, Hitoshi, Kenji Hirotani, Hiroyuki Naito, et al.. (2002). Synthesis and mechanism of action of novel pyrimidinyl pyrazole derivatives possessing antiproliferative activity. Bioorganic & Medicinal Chemistry Letters. 12(21). 3191–3193. 30 indexed citations
3.
4.
Iwahana, Michio, et al.. (2000). Antiproliferative activity and mechanism of action of DZ-3358, a novel pyrimidinyl pyrazole derivative.. PubMed. 20(2A). 785–92. 10 indexed citations
5.
Naito, Hiroyuki, Masamichi Sugimori, Ikuo Mitsui, et al.. (1999). Synthesis and Antitumor Activity of Novel Pyrimidinyl Pyrazole Derivatives.. Chemical and Pharmaceutical Bulletin. 47(12). 1679–1684. 24 indexed citations
6.
Kumazawa, Eiji, et al.. (1997). Synthesis and Antitumor Activity of Novel Benzophenone Derivatives.. Chemical and Pharmaceutical Bulletin. 45(9). 1470–1474. 21 indexed citations
7.
Nakamura, Takanori, Yungling Leo Lee, Fumio Hashimoto, et al.. (1996). Cytotoxic Activities of Solanum Steroidal Glycosides.. Biological and Pharmaceutical Bulletin. 19(4). 564–566. 117 indexed citations
8.
Katayama, Hajime, et al.. (1996). Synthetic dual inhibitors of DNA topoisomerase I and II.. Chemical and Pharmaceutical Bulletin. 44(6). 1276–1278. 1 indexed citations
9.
Mitsui, Ikuo, Eiji Kumazawa, Yasuhide Hirota, et al.. (1995). A New Water‐soluble Camptothecin Derivative, DX‐8951f, Exhibits Potent Antitumor Activity against Human Tumors in vitro and in vivo. Japanese Journal of Cancer Research. 86(8). 776–782. 134 indexed citations
10.
Terasawa, Hirofumi, Masamichi Sugimori, Akio Ejima, et al.. (1994). Antitumor Agents. VI. Synthesis and Antitumor Activity of Ring A-, Ring B-, and Ring C-Modified Derivatives of Camptothecin. Heterocycles. 38(1). 81–81. 16 indexed citations
11.
Sugimori, Masamichi, Akio Ejima, Satoru Ohsuki, et al.. (1994). ChemInform Abstract: Antitumor Agents. Part 6. Synthesis and Antitumor Activity of Ring A‐, Ring B‐, and Ring C‐Modified Derivatives of Camptothecin.. ChemInform. 25(25). 2 indexed citations
12.
Sugimori, Masamichi, Akio Ejima, Satoru Ohsuki, et al.. (1994). Antitumor Agents. VII. Synthesis and Antitumor Activity of Novel Hexacyclic Camptothecin Analogs. Journal of Medicinal Chemistry. 37(19). 3033–3039. 39 indexed citations
13.
Kuga, Hiroshi, et al.. (1993). Isolation and Characterization of Cytotoxic Compounds from Corn. Bioscience Biotechnology and Biochemistry. 57(6). 1020–1021. 23 indexed citations
14.
Saito, Fumio, et al.. (1993). Antitumor Activities of Ketol Forms of Unsaturated Fatty Acids from a Water Extract of Corn Grain.. Nippon Nōgeikagaku Kaishi. 67(10). 1411–1416. 3 indexed citations
15.
Ejima, Akio, Hiroaki Terasawa, Masamichi Sugimori, et al.. (1992). Antitumor Agents. V. Synthesis and Antileukemic Activity of E-Ring-Modified (RS)-Camptothecin Analogues.. Chemical and Pharmaceutical Bulletin. 40(3). 683–688. 17 indexed citations
16.
Terasawa, Hirofumi, Akio Ejima, & Masamichi Sugimori. (1991). Synthesis and Antitumor Activity of Camptothecin Analogues.. Journal of Synthetic Organic Chemistry Japan. 49(11). 1013–1020. 2 indexed citations
17.
Ejima, Akio, et al.. (1987). Synthesis and antimicrobial activity of cephalosporins with a 1-pyridinium substituent carrying a 5-membered heterocycle at the C-3 position.. The Journal of Antibiotics. 40(1). 43–48. 11 indexed citations
18.
19.
Watanabe, Isamu, Akio Ejima, Tsutomu Tsuchiya, Sumio Umezawa, & HAMAO UMEZAWA. (1975). Synthesis of 6′-Amino-1-N-[(S)-4-Amino-2-Hydroxybutyryl]-6′-Deoxylividomycin A. Bulletin of the Chemical Society of Japan. 48(8). 2303–2305. 1 indexed citations
20.
Namba, Yukiko, Kiyoshi YOSHIZAWA, Akio Ejima, Takahiro Hayashi, & T. Kaneda. (1969). Coenzyme A- and Nicotinamide Adenine Dinucleotide-dependent Branched Chain α-Keto Acid Dehydrogenase. Journal of Biological Chemistry. 244(16). 4437–4447. 50 indexed citations

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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