Gen Koga

445 total citations
32 papers, 312 citations indexed

About

Gen Koga is a scholar working on Organic Chemistry, Physical and Theoretical Chemistry and Molecular Biology. According to data from OpenAlex, Gen Koga has authored 32 papers receiving a total of 312 indexed citations (citations by other indexed papers that have themselves been cited), including 26 papers in Organic Chemistry, 11 papers in Physical and Theoretical Chemistry and 5 papers in Molecular Biology. Recurrent topics in Gen Koga's work include Chemical Reactions and Mechanisms (10 papers), Chemical Synthesis and Reactions (9 papers) and Asymmetric Synthesis and Catalysis (5 papers). Gen Koga is often cited by papers focused on Chemical Reactions and Mechanisms (10 papers), Chemical Synthesis and Reactions (9 papers) and Asymmetric Synthesis and Catalysis (5 papers). Gen Koga collaborates with scholars based in Japan and United States. Gen Koga's co-authors include Takeshi Oriyama, Yuzo Kawada, J.‐P. Anselme, Hiroshi Yamazaki, Hiromi Sakai, Hiizu Iwamura, Shigeru Murata, Masaki Takahashi, Stephen J. Weininger and Shuntarō Mataka and has published in prestigious journals such as Journal of the American Chemical Society, The Journal of Organic Chemistry and Tetrahedron.

In The Last Decade

Gen Koga

32 papers receiving 297 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Gen Koga Japan 12 287 91 58 47 38 32 312
Ennio Ciuffarin Italy 12 280 1.0× 59 0.6× 64 1.1× 72 1.5× 32 0.8× 27 359
P. H. J. OOMS Netherlands 6 322 1.1× 49 0.5× 51 0.9× 21 0.4× 27 0.7× 16 355
Otto Schallner Germany 11 274 1.0× 39 0.4× 52 0.9× 51 1.1× 33 0.9× 17 314
Chandra D. Roy United States 10 259 0.9× 80 0.9× 46 0.8× 31 0.7× 55 1.4× 28 359
Janusz Baran Germany 10 332 1.2× 40 0.4× 64 1.1× 46 1.0× 83 2.2× 27 387
Ranjan C. Patel United Kingdom 13 434 1.5× 91 1.0× 43 0.7× 73 1.6× 67 1.8× 55 508
R. G. PEWS United States 13 329 1.1× 47 0.5× 45 0.8× 44 0.9× 41 1.1× 52 423
Harold D. Banks United States 12 294 1.0× 84 0.9× 41 0.7× 79 1.7× 23 0.6× 34 351
Roger C. Hahn United States 11 233 0.8× 43 0.5× 60 1.0× 31 0.7× 30 0.8× 26 305
Charles E. Klopfenstein United States 13 276 1.0× 54 0.6× 43 0.7× 63 1.3× 23 0.6× 25 385

Countries citing papers authored by Gen Koga

Since Specialization
Citations

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

Fields of papers citing papers by Gen Koga

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Gen Koga

This figure shows the co-authorship network connecting the top 25 collaborators of Gen Koga. A scholar is included among the top collaborators of Gen Koga 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 Gen Koga. Gen Koga 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.
2.
Oriyama, Takeshi, et al.. (1995). A novel and convenient synthesis of 2-aryl-4-methylenetetrahydrofurans from 2-(trimethylsiloxymethyl)allytrimethylsilane and acetals. Tetrahedron Letters. 36(31). 5581–5584. 10 indexed citations
3.
Oriyama, Takeshi, et al.. (1995). Highly Regioselective Tin-Mediated Ring-Opening of 2,3-Epoxy Alcohol Derivatives With Trimethylsilyl Halide. Synlett. 1995(10). 1004–1006. 13 indexed citations
4.
5.
Oriyama, Takeshi, et al.. (1994). A One-Step Conversion of p-Methoxybenzyl Ethers into Methoxymethyl Ethers by the Action of Dimethoxymethane in the Presence of Tin(II) Bromide and Bromomethyl Methyl Ether. Bulletin of the Chemical Society of Japan. 67(3). 885–887. 14 indexed citations
6.
Takahashi, Masaki, et al.. (1994). o-trimethylsilylphenyllithium as a synthetic equivalent of o-halophenyllithium. Tetrahedron Letters. 35(4). 579–582. 3 indexed citations
7.
Kawada, Yuzo, et al.. (1994). Preparation of and dynamic gearing in cis-1,2-bis(9-triptycyl)ethylene. Tetrahedron Letters. 35(1). 139–142. 27 indexed citations
8.
Oriyama, Takeshi, et al.. (1993). Tin(II) Bromide - Acetyl Bromide: A Mild and Efficient Reagent for Direct Conversion of Alcohol Benzyl Ethers into Acetates. Synlett. 1993(6). 437–440. 20 indexed citations
9.
Takahashi, Masaki, Ken Hatano, Yuzo Kawada, et al.. (1993). Synthesis and crystal structure of 9,10-disilatriptycenes. Journal of the Chemical Society Chemical Communications. 1850–1850. 9 indexed citations
10.
Oriyama, Takeshi, et al.. (1991). Halogenative Allylation and Reduction of Aromatic Acetals by Double Substitution of Alkoxyl Groups in Acetal. Bulletin of the Chemical Society of Japan. 64(4). 1410–1412. 6 indexed citations
11.
12.
Koga, Gen, et al.. (1983). The photolysis of 2-phenyltetrazole. Journal of the Chemical Society Chemical Communications. 610–610. 1 indexed citations
13.
Koga, Gen, et al.. (1979). . Journal of Synthetic Organic Chemistry Japan. 37(10). 843–855. 2 indexed citations
14.
Weininger, Stephen J., et al.. (1974). Azido transfer reaction to aliphatic carbons. The Journal of Organic Chemistry. 39(11). 1591–1592. 16 indexed citations
15.
Koga, Gen. (1970). The Formation and Reactions of Organic Azides. Journal of Synthetic Organic Chemistry Japan. 28(10). 996–1010. 1 indexed citations
16.
Koga, Gen, et al.. (1969). Thermal and photolytic decomposition of N-benzhydrylidene azidobenzhydrylamine. Canadian Journal of Chemistry. 47(7). 1143–1146. 2 indexed citations
17.
Koga, Gen, et al.. (1969). PREPARATION OF BIS(4-HYDROXYPHENYL) ETHER. 1(3). 205–208. 3 indexed citations
18.
Koga, Gen & J.‐P. Anselme. (1968). The formation of azides by the reaction of amine anions with nitrous oxide. Chemical Communications (London). 446–446. 2 indexed citations
19.
Koga, Gen, et al.. (1968). Photo-Claisen Rearrangement. The Photochemical Rearrangement of Allyl Phenyl Ethers. Bulletin of the Chemical Society of Japan. 41(3). 745–746. 15 indexed citations
20.
Koga, Gen, et al.. (1956). The Synthesis and the Estrogenic Activity of Bis-2,4-dihydroxyphenyl disulfide and the Related Thiophenol. Bulletin of the Chemical Society of Japan. 29(3). 419–421. 5 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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