Masashi Ohba

1.4k total citations
111 papers, 981 citations indexed

About

Masashi Ohba is a scholar working on Organic Chemistry, Pharmacology and Molecular Biology. According to data from OpenAlex, Masashi Ohba has authored 111 papers receiving a total of 981 indexed citations (citations by other indexed papers that have themselves been cited), including 82 papers in Organic Chemistry, 34 papers in Pharmacology and 27 papers in Molecular Biology. Recurrent topics in Masashi Ohba's work include Chemical synthesis and alkaloids (36 papers), Alkaloids: synthesis and pharmacology (29 papers) and Plant-based Medicinal Research (25 papers). Masashi Ohba is often cited by papers focused on Chemical synthesis and alkaloids (36 papers), Alkaloids: synthesis and pharmacology (29 papers) and Plant-based Medicinal Research (25 papers). Masashi Ohba collaborates with scholars based in Japan, United States and India. Masashi Ohba's co-authors include Tozo Fujii, Amos B. Smith, Hiroyuki Ishibashi, John N. Haseltine, Paul A. Heiney, Takashi Sakuma, Ernest Fontes, Hiroyuki Kubo, Eiji Shimizu and Masazumi Ikeda and has published in prestigious journals such as Journal of the American Chemical Society, Applied and Environmental Microbiology and The Journal of Organic Chemistry.

In The Last Decade

Masashi Ohba

100 papers receiving 935 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Masashi Ohba Japan 19 655 276 149 94 89 111 981
Philip J. Parsons United Kingdom 23 2.0k 3.0× 415 1.5× 144 1.0× 126 1.3× 84 0.9× 147 2.3k
Yoshinobu Inouye Japan 16 493 0.8× 267 1.0× 41 0.3× 155 1.6× 43 0.5× 62 837
Gilbert Revıal France 21 1.1k 1.7× 327 1.2× 54 0.4× 63 0.7× 29 0.3× 56 1.3k
Jesús Téllez Vázquez Spain 21 651 1.0× 531 1.9× 27 0.2× 54 0.6× 36 0.4× 67 1.2k
Albert W. Burgstahler United States 21 809 1.2× 462 1.7× 58 0.4× 92 1.0× 65 0.7× 80 1.4k
Victor Lee United Kingdom 21 1.1k 1.6× 364 1.3× 79 0.5× 279 3.0× 60 0.7× 51 1.4k
Edward E. Smissman United States 20 640 1.0× 424 1.5× 65 0.4× 21 0.2× 74 0.8× 118 1.2k
Shinji Kitagaki Japan 33 2.8k 4.3× 323 1.2× 61 0.4× 91 1.0× 115 1.3× 97 3.1k
William S. Wadsworth United States 11 1.2k 1.9× 368 1.3× 35 0.2× 66 0.7× 42 0.5× 25 1.5k
Jacob Szmuszkovicz United States 19 1.7k 2.5× 626 2.3× 60 0.4× 45 0.5× 46 0.5× 93 2.3k

Countries citing papers authored by Masashi Ohba

Since Specialization
Citations

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

Fields of papers citing papers by Masashi Ohba

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Masashi Ohba

This figure shows the co-authorship network connecting the top 25 collaborators of Masashi Ohba. A scholar is included among the top collaborators of Masashi Ohba 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 Masashi Ohba. Masashi Ohba 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
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Izumo, Nobuo, et al.. (2011). Decreased voluntary activity and amygdala levels of serotonin and dopamine in ovariectomized rats. Behavioural Brain Research. 227(1). 1–6. 36 indexed citations
3.
Ohba, Masashi, et al.. (2011). Formation of the 1H-Pyrrolo[3,4-c]pyridin-1-one Skeleton via Intramolecular Diels-Alder Reaction of Oxazoles. Heterocycles. 83(6). 1395–1395. 1 indexed citations
4.
Ohba, Masashi, et al.. (2006). Use of the Oxazole-Olefin Diels-Alder Reaction in the Total Synthesis of the Monoterpene Alkaloids (-)-Plectrodorine and (+)-Oxerine. Chemical and Pharmaceutical Bulletin. 54(1). 63–67. 14 indexed citations
5.
Ishibashi, Hiroyuki, Masahiro Higuchi, Masashi Ohba, & Masazumi Ikeda. (1998). Effect of Temperature of 5-Endo- and 4-Exo-Trig Radical Cyclizations of N-Vinylic α-Halo Amides. Tetrahedron Letters. 39(1-2). 75–78. 35 indexed citations
6.
Fujii, Tozo, et al.. (1994). Purines. LXV. Preparatory Study for the Syntheses of the Marine Sponge Purines Agelasimines-A and -B: Synthesis and Acetylation of Their N(7)-Benzyl Analogues.. Chemical and Pharmaceutical Bulletin. 42(12). 2461–2466. 3 indexed citations
7.
Fujii, Tozo, et al.. (1993). Purines. LV. Syntheses and Cytokinin Activities of Some Adenine and Adenosine Derivatives Related to 1'-Methylzeatin.. Chemical and Pharmaceutical Bulletin. 41(8). 1362–1365. 6 indexed citations
8.
Evidente, Antonio, Gennaro Piccialli, Angelo Sisto, et al.. (1992). Syntheses of cis-Zeatin and Its 9-(2-Deoxy-.BETA.-D-ribofuranosyl) Derivative. A Novel Synthetic Route to the Side Chain at C (6), and Cytokinin Activity.. Chemical and Pharmaceutical Bulletin. 40(7). 1937–1939. 5 indexed citations
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Ohba, Masashi, et al.. (1987). Quinolizidines. XX. Racemic and chiral syntheses of the Alangium alkaloids 9-demethylprotoemetinol and 10-demethylprotoemetinol.. Chemical and Pharmaceutical Bulletin. 35(7). 2755–2760.
11.
Fujii, Tozo, et al.. (1986). Structure Determination of the Ochrosia Alkaloid Ochropposinine: Syntheses of (±)- and (-)-Ochropposinine. Heterocycles. 24(5). 1215–1215. 5 indexed citations
12.
13.
Fujii, Tozo & Masashi Ohba. (1985). Quinolizidines. XVI. Chiral syntheses of 9-demethylcephaeline and 10-demethylcephaeline.. Chemical and Pharmaceutical Bulletin. 33(12). 5264–5269. 6 indexed citations
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Ohba, Masashi, Mitsuko Hayashi, & Tozo Fujii. (1985). Quinolizidines. XIV. A racemic synthesis of 9-demethyltubulosine, an alkaloid isolated from Alangium vitiense.. Chemical and Pharmaceutical Bulletin. 33(9). 3724–3730. 4 indexed citations
17.
Fujii, Tozo, Masashi Ohba, Satyesh C. Pakrashi, & Esahak Ali. (1979). Structure and synthesis of desmethylpsychotrine. Tetrahedron Letters. 20(51). 4955–4958. 1 indexed citations
18.
Fujii, Tozo, Masashi Ohba, Shigeyuki Yoshifuji, & Makoto Kirisawa. (1977). Lactams. X. The alkaline ferricyanide oxidation of 3-substituted 1-(3,4-dimethoxyphenethyl)pyridinium salts: Effects of functional substituents.. Chemical and Pharmaceutical Bulletin. 25(11). 2887–2894.
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Fujii, Tozo, et al.. (1975). Quinolizidines. I. Quaternization of the quinolizidine system: effect of .BETA.,.GAMMA.-unsaturation on stereoselectivity in methiodide formation.. Chemical and Pharmaceutical Bulletin. 23(1). 144–156. 2 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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