S. Morris Kupchan

11.3k total citations · 2 hit papers
269 papers, 8.4k citations indexed

About

S. Morris Kupchan is a scholar working on Molecular Biology, Organic Chemistry and Ecology, Evolution, Behavior and Systematics. According to data from OpenAlex, S. Morris Kupchan has authored 269 papers receiving a total of 8.4k indexed citations (citations by other indexed papers that have themselves been cited), including 115 papers in Molecular Biology, 95 papers in Organic Chemistry and 42 papers in Ecology, Evolution, Behavior and Systematics. Recurrent topics in S. Morris Kupchan's work include Chemical synthesis and alkaloids (33 papers), Botanical Research and Chemistry (26 papers) and Biological Activity of Diterpenoids and Biflavonoids (23 papers). S. Morris Kupchan is often cited by papers focused on Chemical synthesis and alkaloids (33 papers), Botanical Research and Chemistry (26 papers) and Biological Activity of Diterpenoids and Biflavonoids (23 papers). S. Morris Kupchan collaborates with scholars based in United States, Japan and Canada. S. Morris Kupchan's co-authors include R. F. Bryan, M. Allan Eakin, Aziz Karim, R.J. Hemingway, Carl W. Sigel, C. J. Gilmore, A. M. THOMAS, William A. Court, Roger M. Smith and Myra F. Ziegler and has published in prestigious journals such as Science, Proceedings of the National Academy of Sciences and Journal of the American Chemical Society.

In The Last Decade

S. Morris Kupchan

266 papers receiving 7.7k citations

Hit Papers

align trajectories

What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

Tumor inhibitors. 69. Structure-cytotoxicity relations among the sesquiterpene lactones

1971 439 citations S. Morris Kupchan, M. Allan Eakin et al. Journal of Medicinal Chemistry profile →
Tumor inhibitors. LXXIV. Triptolide and tripdiolide, novel antileukemic diterpenoid triepoxides from Tripterygium wilfordii

1972 405 citations S. Morris Kupchan, William A. Court et al. Journal of the American Chemical Society profile →

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
S. Morris Kupchan United States	47	4.3k	2.6k	1.5k	1.2k	1.0k	269	8.4k
Isao Kitagawa Japan	46	4.5k 1.0×	2.1k 0.8×	1.6k 1.1×	542 0.4×	1.4k 1.3×	405	8.5k
Yoshimasa Hiratå Japan	47	3.0k 0.7×	3.2k 1.2×	608 0.4×	656 0.5×	1.4k 1.3×	307	7.8k
Hideji Itokawa Japan	54	6.0k 1.4×	2.3k 0.9×	2.4k 1.6×	429 0.4×	1.5k 1.5×	401	10.6k
M. R. Boyd United States	12	4.5k 1.0×	3.2k 1.2×	1.1k 0.7×	687 0.6×	1.3k 1.3×	18	9.3k
Kenneth M. Snader United States	22	2.7k 0.6×	1.6k 0.6×	1.3k 0.9×	308 0.3×	1.5k 1.4×	42	6.3k
Geoffrey A. Cordell United States	44	3.7k 0.9×	1.6k 0.6×	2.3k 1.5×	398 0.3×	1.2k 1.1×	264	7.3k
jeannette mcmahon United States	11	4.4k 1.0×	3.1k 1.2×	1.1k 0.7×	638 0.5×	1.2k 1.2×	16	9.1k
Hiroshi Kakisawa Japan	31	2.4k 0.6×	3.1k 1.2×	796 0.5×	449 0.4×	1.7k 1.6×	168	6.5k
Susan Kenney United States	15	4.6k 1.1×	3.1k 1.2×	1.2k 0.8×	691 0.6×	1.3k 1.3×	25	9.5k
Ritsa Storeng Norway	25	4.6k 1.1×	3.1k 1.2×	1.0k 0.7×	761 0.6×	1.3k 1.2×	53	10.9k

Countries citing papers authored by S. Morris Kupchan

Since Specialization

Citations

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

Fields of papers citing papers by S. Morris Kupchan

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by S. Morris Kupchan. 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 S. Morris Kupchan. The network helps show where S. Morris Kupchan may publish in the future.

Co-authorship network of co-authors of S. Morris Kupchan

This figure shows the co-authorship network connecting the top 25 collaborators of S. Morris Kupchan. A scholar is included among the top collaborators of S. Morris Kupchan 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 S. Morris Kupchan. S. Morris Kupchan is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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20 of 20 papers shown

Kupchan, S. Morris, Yasuo Komoda, Alan R. Branfman, et al.. (1977). ChemInform Abstract: TUMOR INHIBITORS. 122. THE MAYTANSINOIDS. ISOLATION, STRUCTURAL ELUCIDATION, N, AND CHEMICAL INTERRELATION OF NOVEL ANSA MACROLIDES. Chemischer Informationsdienst. 8(43). 10 indexed citations

Kupchan, S. Morris, et al.. (1976). Biomimetic Synthesis of the Dibenzazonine Alkaloid Laurifonine. Heterocycles. 4(2). 235–235. 4 indexed citations

Kupchan, S. Morris, et al.. (1976). Antileukemic Principles Isolated from Euphorbiaceae Plants. Science. 191(4227). 571–572. 149 indexed citations

Kupchan, S. Morris, et al.. (1974). Isolation and structural elucidation of allamandin, and antileukemic iridoid lactone from allamanda cathartica. The Journal of Organic Chemistry. 39(17). 2477–2482. 64 indexed citations

Kupchan, S. Morris, et al.. (1973). Novel oxidative photochemical aporphine synthesis. Total synthesis of corunnine and nandazurine. Journal of the Chemical Society Chemical Communications. 915–915. 10 indexed citations

Lillehaug, Johan R., Kjell Kleppe, Carl W. Sigel, & S. Morris Kupchan. (1973). Reaction of biological thiols with the tumor inhibitor of jatrophone Inhibition of RNA polymerase. Biochimica et Biophysica Acta (BBA) - Enzymology. 327(1). 92–100. 14 indexed citations

Kupchan, S. Morris, et al.. (1972). Buxus alkaloids. XIV. Chemistry of 9.beta., 19-cyclo steroid derivatives. The Journal of Organic Chemistry. 37(16). 2523–2532. 6 indexed citations

Kupchan, S. Morris, et al.. (1971). Cytotoxic flavonols from Baccharis sarothroides. Phytochemistry. 10(3). 664–666. 28 indexed citations

Kupchan, S. Morris, Matthew Suffness, & Eric M. Gordon. (1970). Isolation and structure elucidation of oxoxylopine, a new oxoaporphine alkaloid from Stephania abyssinica. The Journal of Organic Chemistry. 35(5). 1682–1684. 15 indexed citations

10.

Kupchan, S. Morris, et al.. (1970). Tumor inhibitors. LVII. Reaction of endocyclic .alpha.,.beta.-unsaturated .gamma.-lactones with thiols. The Journal of Organic Chemistry. 35(10). 3539–3543. 54 indexed citations

11.

Kupchan, S. Morris, R.J. Hemingway, Dieter Werner, & Aziz Karim. (1969). Tumor inhibitors. XLVI. Vernolepin, a novel sesquiterpene dilactone tumor inhibitor from Vernonia hymenolepis. The Journal of Organic Chemistry. 34(12). 3903–3908. 65 indexed citations

12.

Kupchan, S. Morris, et al.. (1969). The isolation and structural elucidation of a novel naturally-occurring bufadienolide orthoacetate. Tetrahedron Letters. 10(21). 1709–1712. 24 indexed citations

13.

Kupchan, S. Morris, et al.. (1969). Tumor inhibitors. XLIV. Isolation and characterization of hellebrigenin 3-acetate and hellebrigenin 3,5-diacetate, Bufadienolide tumor inhibitors from Bersama abyssinica. The Journal of Organic Chemistry. 34(12). 3894–3898. 28 indexed citations

14.

Kupchan, S. Morris, et al.. (1968). Tumor inhibitors. XXXI. Vernolepin, a novel elemanolide dilactone tumor inhibitor from Vernonia hymenolepis. Journal of the American Chemical Society. 90(13). 3596–3597. 90 indexed citations

15.

Kupchan, S. Morris & A. F. Casy. (1967). Drug Latentiation. II.¹ Labile Ether Derivatives of Phenolic Analgesics. Journal of Medicinal Chemistry. 10(5). 959–960. 3 indexed citations

16.

Brown, Keith S. & S. Morris Kupchan. (1964). Buxus Alkaloids. V.¹ The Constitution of Cyclobuxamine, a 4β-Monomethyl Cyclosteroid Alkaloid². Journal of the American Chemical Society. 86(20). 4430–4433. 3 indexed citations

17.

Kupchan, S. Morris, K.K. Chakravarti, & Naokata Yokoyama. (1963). Thalictrum Alkaloids I. Journal of Pharmaceutical Sciences. 52(10). 985–988. 42 indexed citations

18.

Kupchan, S. Morris, Stuart P. Eriksen, & Mendel Friedman. (1962). General Base-General Acid-Catalysis of Ester Solvolysis. Journal of the American Chemical Society. 84(21). 4159–4160. 6 indexed citations

19.

Kupchan, S. Morris, et al.. (1961). Veratrum Alkaloids--XLIV. Structure-Activity Relationships in a Series of Synthetic Hypotensive Esters of Protoverine. Journal of Medicinal Chemistry. 3(1). 129–155. 7 indexed citations

20.

Krayer, Otto, et al.. (1953). Untersuchungen �ber die Veratrumalkaloide. Naunyn-Schmiedeberg s Archives of Pharmacology. 219(5). 371–85. 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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