Jay O'Brien

517 total citations
30 papers, 321 citations indexed

About

Jay O'Brien is a scholar working on Organic Chemistry, Molecular Biology and Pharmacology. According to data from OpenAlex, Jay O'Brien has authored 30 papers receiving a total of 321 indexed citations (citations by other indexed papers that have themselves been cited), including 16 papers in Organic Chemistry, 6 papers in Molecular Biology and 5 papers in Pharmacology. Recurrent topics in Jay O'Brien's work include Chemical synthesis and alkaloids (7 papers), Synthesis and Biological Activity (4 papers) and Berberine and alkaloids research (3 papers). Jay O'Brien is often cited by papers focused on Chemical synthesis and alkaloids (7 papers), Synthesis and Biological Activity (4 papers) and Berberine and alkaloids research (3 papers). Jay O'Brien collaborates with scholars based in United States, Switzerland and Canada. Jay O'Brien's co-authors include S. Teitel, Erno Mohacsi, L. Todaro, David L. Coffen, A. BROSSI, Arnold Brossi, Harry R. Allcock, Robert W. Allen, William F. Pool and John Barnes and has published in prestigious journals such as Journal of the American Chemical Society, Journal of Agricultural and Food Chemistry and Journal of Medicinal Chemistry.

In The Last Decade

Jay O'Brien

25 papers receiving 298 citations

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
Jay O'Brien United States	9	152	102	52	40	38	30	321
J. Schmutz Switzerland	14	326 2.1×	160 1.6×	46 0.9×	59 1.5×	67 1.8×	44	496
Michel Debaert France	12	160 1.1×	176 1.7×	119 2.3×	29 0.7×	17 0.4×	51	382
Joachim Knabe Germany	13	317 2.1×	143 1.4×	22 0.4×	28 0.7×	40 1.1×	92	481
Norman R. Schmuff United States	10	283 1.9×	125 1.2×	34 0.7×	9 0.2×	30 0.8×	15	497
Nathalie Flouquet France	11	232 1.5×	170 1.7×	75 1.4×	21 0.5×	21 0.6×	31	394
Fred M. Hershenson United States	14	308 2.0×	178 1.7×	64 1.2×	38 0.9×	56 1.5×	35	461
Barry M. Bloom United States	9	76 0.5×	121 1.2×	35 0.7×	30 0.8×	27 0.7×	17	269
Horace Fletcher Hungary	9	214 1.4×	120 1.2×	44 0.8×	10 0.3×	74 1.9×	11	358
Ivo Jirkovsky United States	13	326 2.1×	130 1.3×	23 0.4×	18 0.5×	56 1.5×	34	460
Edward J. Glamkowski United States	10	244 1.6×	101 1.0×	37 0.7×	19 0.5×	24 0.6×	22	334

Countries citing papers authored by Jay O'Brien

Since Specialization

Citations

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

Fields of papers citing papers by Jay O'Brien

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Jay O'Brien. 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 Jay O'Brien. The network helps show where Jay O'Brien may publish in the future.

Co-authorship network of co-authors of Jay O'Brien

This figure shows the co-authorship network connecting the top 25 collaborators of Jay O'Brien. A scholar is included among the top collaborators of Jay O'Brien 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 Jay O'Brien. Jay O'Brien 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

O'Brien, Jay & James P. Morton. (1996). The Poverty of Nations: The Aid Dilemma at the Heart of Africa. The International Journal of African Historical Studies. 29(1). 198–198. 1 indexed citations

Henige, David, Jay O'Brien, & William Roseberry. (1993). Golden Ages, Dark Ages: Imagining the Past in Anthropology and History. Ethnohistory. 40(2). 313–313.

Mohacsi, Erno, et al.. (1992). Enantioselective synthesis of calcium channel blockers of the diltiazem group. The Journal of Organic Chemistry. 57(3). 851–856. 95 indexed citations

Mohacsi, Erno, Jay O'Brien, & L. Todaro. (1992). Synthesis, stereochemistry and pharmacological activity of rac.‐cis‐tetrahydro‐6‐hydroxy‐7‐(4‐methoxyphenyl)‐1,4‐thiazepin‐5(2H)‐ones. Journal of Heterocyclic Chemistry. 29(1). 193–197. 2 indexed citations

Nugent, Daniel, Jay O'Brien, & William Roseberry. (1992). Golden Ages, Dark Ages: Imagining the Past in Anthropology and History.. Hispanic American Historical Review. 72(3). 413–413. 7 indexed citations

Mohacsi, Erno & Jay O'Brien. (1991). The base‐promoted dehydration of rac.‐trans‐tetrahydro‐6‐hydroxy‐4‐[(2‐(dimethylamino)ethyl]‐7‐(4‐methoxyphenyl)‐1,4‐thiazepin‐5(2H)‐one. Journal of Heterocyclic Chemistry. 28(8). 2051–2052. 3 indexed citations

Mohacsi, Erno & Jay O'Brien. (1991). Synthesis and stereochemistry of the (9S,13S,14S)‐3‐hydroxy‐17‐methylmorphinan‐10‐ols. Journal of Heterocyclic Chemistry. 28(1). 93–95. 1 indexed citations

Mohacsi, Erno, Jay O'Brien, John F. Blount, & Jerry Sepinwall. (1990). Synthesis and stereochemistry of tetrahydro‐4‐aryl‐3‐[(dimethylamino)methyl]‐2H‐pyranols as potential analgesics. Journal of Heterocyclic Chemistry. 27(6). 1623–1628.

O'Brien, Jay & Jane I. Guyer. (1989). Feeding African Cities: Studies in Regional Social History. The International Journal of African Historical Studies. 22(1). 113–113. 5 indexed citations

10.

O'Brien, Jay, et al.. (1987). Tenants and Nomads in Eastern Sudan: A Study of Economic Adaptations in the New Halfa Scheme. Canadian Journal of African Studies / Revue canadienne des études africaines. 21(2). 299–299. 1 indexed citations

11.

O'Brien, Jay, et al.. (1986). Understanding the Crisis in Sudan. Canadian Journal of African Studies / Revue canadienne des études africaines. 20(2). 275–275. 1 indexed citations

12.

Mohacsi, Erno, Jay O'Brien, John F. Blount, & Jerry Sepinwall. (1985). Acylmorphinans. A novel class of potent analgesic agents. Journal of Medicinal Chemistry. 28(9). 1177–1180. 4 indexed citations

13.

Allcock, Harry R., Robert W. Allen, & Jay O'Brien. (1976). Antitumour agents synthesized from K2PtCl4 and polymeric or cyclic phosphazenes. Journal of the Chemical Society Chemical Communications. 717–717. 17 indexed citations

14.

Teitel, S. & Jay O'Brien. (1974). Tetrahydroprotoberberibes Derived from R- ans S-1-(3,4-Dihydroxybenzyl)-1,2,3,4-tetrahydroisoquinoline. Heterocycles. 2(5). 625–625.

15.

Teitel, S., Jay O'Brien, & A. BROSSI. (1972). Conversion of (-)-.beta.-hydrastine into (-)-bicuculline and related phthalideisoquinolines. The Journal of Organic Chemistry. 37(12). 1879–1881. 12 indexed citations

16.

Teitel, S., et al.. (1972). Alkaloids in mammalian tissues. 2. Synthesis of (+)- and (-)-1-substituted-6,7-dihydroxy-1,2,3,4-tetrahydroisoquinolines. Journal of Medicinal Chemistry. 15(8). 845–846. 70 indexed citations

17.

Brossi, Arnold, John F. Blount, Jay O'Brien, & S. Teitel. (1971). New synthesis and absolute configuration of tetrahydroisoquinoline cactus alkaloids. Journal of the American Chemical Society. 93(23). 6248–6252. 7 indexed citations

18.

Fellig, J., et al.. (1970). Substituted phenyl 2-propynyl ethers as carbamate synergists. Journal of Agricultural and Food Chemistry. 18(1). 78–80. 22 indexed citations

19.

BROSSI, A., Jay O'Brien, & S. Teitel. (1970). CORYPALLINE. 2(4). 281–283. 8 indexed citations

20.

BROSSI, A., Jay O'Brien, & S. Teitel. (1969). Totalsynthese und absolute Konfiguration von natürlichem Multifloramin. Helvetica Chimica Acta. 52(3). 678–689. 13 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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