B. UMEZAWA

870 total citations
104 papers, 513 citations indexed

About

B. UMEZAWA is a scholar working on Organic Chemistry, Cancer Research and Biochemistry. According to data from OpenAlex, B. UMEZAWA has authored 104 papers receiving a total of 513 indexed citations (citations by other indexed papers that have themselves been cited), including 95 papers in Organic Chemistry, 35 papers in Cancer Research and 26 papers in Biochemistry. Recurrent topics in B. UMEZAWA's work include Chemical synthesis and alkaloids (36 papers), Synthesis and Biological Activity (35 papers) and Traditional and Medicinal Uses of Annonaceae (26 papers). B. UMEZAWA is often cited by papers focused on Chemical synthesis and alkaloids (36 papers), Synthesis and Biological Activity (35 papers) and Traditional and Medicinal Uses of Annonaceae (26 papers). B. UMEZAWA collaborates with scholars based in Japan and Bulgaria. B. UMEZAWA's co-authors include Osamu Hoshino, Hiroshi Hara, HIDEYO SHINDO, Ryuichi Shirai, Yöichi Iitaka, Kazuhiko Mori, Masatomo Hamana, Haruki Sashida, Miyuki Ishizaki and Masashi Ogawa 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

B. UMEZAWA

87 papers receiving 454 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
B. UMEZAWA Japan 13 428 119 116 69 59 104 513
Albert Mondon Germany 16 515 1.2× 102 0.9× 284 2.4× 88 1.3× 28 0.5× 89 766
Krystyna Wojtasiewicz Poland 13 361 0.8× 56 0.5× 159 1.4× 65 0.9× 31 0.5× 46 512
Shojiro Uyeo Japan 16 575 1.3× 283 2.4× 199 1.7× 20 0.3× 31 0.5× 93 822
Toshiko Kiguchi Japan 16 816 1.9× 71 0.6× 171 1.5× 27 0.4× 53 0.9× 80 917
Kunio Ogasawara Japan 18 885 2.1× 95 0.8× 268 2.3× 28 0.4× 71 1.2× 60 1.0k
Miyuki Ishizaki Japan 16 637 1.5× 92 0.8× 163 1.4× 25 0.4× 42 0.7× 48 728
Steven R. Angle United States 23 1.1k 2.6× 89 0.7× 255 2.2× 21 0.3× 65 1.1× 59 1.3k
Chin‐Kang Sha Taiwan 17 807 1.9× 65 0.5× 159 1.4× 22 0.3× 63 1.1× 64 910
Nein‐Chen Chang Taiwan 17 587 1.4× 75 0.6× 192 1.7× 37 0.5× 63 1.1× 53 677
RH Prager Australia 15 560 1.3× 45 0.4× 208 1.8× 28 0.4× 48 0.8× 98 746

Countries citing papers authored by B. UMEZAWA

Since Specialization
Citations

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

Fields of papers citing papers by B. UMEZAWA

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of B. UMEZAWA

This figure shows the co-authorship network connecting the top 25 collaborators of B. UMEZAWA. A scholar is included among the top collaborators of B. UMEZAWA 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 B. UMEZAWA. B. UMEZAWA 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.
Hara, Hiroshi, et al.. (1988). Studies on tetrahydroisoquinolines. XXXII. Conversion of 7-hydroxy-6-methoxytetrahydroisoquinolines to 6-hydroxy-7-methoxytetrahydroisoquinolines.. Chemical and Pharmaceutical Bulletin. 36(9). 3638–3641. 2 indexed citations
2.
Hara, Hiroshi, Masatoshi Murakata, Osamu Hoshino, B. UMEZAWA, & Tsutomu Inoue. (1988). Studies on tetrahydroisoquinolines. XXXI. A synthesis of tetrahydroisoquinoline dimers by intermolecular C-O coupling.. Chemical and Pharmaceutical Bulletin. 36(5). 1869–1871.
3.
4.
Shirai, Ryuichi, Hiroshi Hara, Osamu Hoshino, & B. UMEZAWA. (1984). A Practical Synthesis of 4-Aryl-1,2,3,4-tetrahydroisoquinolines. Heterocycles. 21(2). 696–696.
5.
UMEZAWA, B., Hiroshi Hara, Masatoshi Murakata, Osamu Hoshino, & Yöichi Iitaka. (1983). A Synthesis of Mixed Tetrahydroisoqunoline Dimers via p-Quinol Acetate. Heterocycles. 20(10). 1969–1969.
6.
Hara, Hiroshi, Osamu Hoshino, & B. UMEZAWA. (1981). . NIPPON KAGAKU KAISHI. 813–818.
7.
Hara, Hiroshi, et al.. (1978). The tetrahydroisoquinoline oxidative rearrangement. Tetrahedron Letters. 19(40). 3809–3812. 1 indexed citations
8.
UMEZAWA, B., et al.. (1977). An alternative synthesis of (.+-.)-.alpha.- and (.+-.)-.gamma.-lycoranes. The Journal of Organic Chemistry. 42(26). 4272–4275. 25 indexed citations
9.
Hoshino, Osamu, et al.. (1974). Studies on tetrahydroisoquinolines. VIII. Lead tetraacetate oxidation of 1,2,3,4-tetrahydro-6-hydroxy-7-methoxy-2-methylisoquinoline and its 1-substituted derivatives.. Chemical and Pharmaceutical Bulletin. 22(11). 2587–2592. 4 indexed citations
10.
Hoshino, Osamu, T. TOSHIOKA, & B. UMEZAWA. (1972). Synthesis of (±)-kreysigine via a p-quinol acetate. Journal of the Chemical Society Chemical Communications. 0(12). 740–741. 2 indexed citations
11.
12.
Hoshino, Osamu, et al.. (1971). Studies on Tetrahydroisoquinolines. V. Synthesis of 4-Alkyl-7-hydroxy-6-methoxy-2-methyl-1, 2, 3, 4-tetrahydroisoquinolines. Chemical and Pharmaceutical Bulletin. 19(10). 2166–2172. 2 indexed citations
13.
Hoshino, Osamu, et al.. (1970). A Further Investigation on Oxidative Coupling of dl-2-Methylisosalsoline. Chemical and Pharmaceutical Bulletin. 18(3). 637–640.
14.
UMEZAWA, B., et al.. (1969). Organic Photochemistry. II. Tetrahydroisoquinolines from Their N-Tosylates. Chemical and Pharmaceutical Bulletin. 17(6). 1120–1122. 4 indexed citations
15.
UMEZAWA, B., et al.. (1969). Chemistry of Cyclotriveratrylene. I. Formation of Cyclotriveratrylene from Veratrylamine N-Tosylates. Chemical and Pharmaceutical Bulletin. 17(11). 2240–2244. 10 indexed citations
16.
UMEZAWA, B., Osamu Hoshino, Hiroshi Hara, & Jinsaku Sakakibara. (1968). Ferricyanide Oxidation of dl-N-Methylisosalsoline and Its Methiodide. Chemical and Pharmaceutical Bulletin. 16(3). 566–569. 2 indexed citations
17.
UMEZAWA, B., Osamu Hoshino, & Yasuo Terayama. (1968). A Novel Rearrangement of a Quinol Acetate. Chemical and Pharmaceutical Bulletin. 16(1). 180–182. 3 indexed citations
18.
Nickon, Alex, et al.. (1964). The Structure and Stereochemistry of α-Caryophyllene Alcohol. Journal of the American Chemical Society. 86(7). 1437–1438. 5 indexed citations
19.
Hamana, Masatomo, et al.. (1962). Studies on Tertiary Amine Oxides. XIII. Reactions of N-(<I>p</I>-Dimethylaminophenyl) nitrones having Pyridine N-Oxide, Quinoline or its N-Oxide as α-Substituent. Chemical and Pharmaceutical Bulletin. 10(10). 961–968. 3 indexed citations
20.
UMEZAWA, B.. (1960). Studies on Tertiary Amine Oxides. VII. : Some Reactions of Several Nitrones.. Chemical and Pharmaceutical Bulletin. 8(11). 967–975. 3 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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