Stephen Challenger

471 total citations
11 papers, 328 citations indexed

About

Stephen Challenger is a scholar working on Organic Chemistry, Inorganic Chemistry and Molecular Biology. According to data from OpenAlex, Stephen Challenger has authored 11 papers receiving a total of 328 indexed citations (citations by other indexed papers that have themselves been cited), including 10 papers in Organic Chemistry, 5 papers in Inorganic Chemistry and 4 papers in Molecular Biology. Recurrent topics in Stephen Challenger's work include Asymmetric Synthesis and Catalysis (5 papers), Asymmetric Hydrogenation and Catalysis (5 papers) and Synthesis and Catalytic Reactions (4 papers). Stephen Challenger is often cited by papers focused on Asymmetric Synthesis and Catalysis (5 papers), Asymmetric Hydrogenation and Catalysis (5 papers) and Synthesis and Catalytic Reactions (4 papers). Stephen Challenger collaborates with scholars based in United Kingdom. Stephen Challenger's co-authors include Andrew Derrick, Paul C. Taylor, James A. Ramsden, Mark J. Burk, Frank Bienewald, Jacob L. Irwin, Shaun Fillery, Hiroya Takada, Richard Storey and Nicholas M. Thomson and has published in prestigious journals such as The Journal of Organic Chemistry, Tetrahedron Letters and Carbohydrate Research.

In The Last Decade

Stephen Challenger

11 papers receiving 311 citations

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
Stephen Challenger United Kingdom	10	286	97	87	30	6	11	328
Marianne Steurer Austria	7	373 1.3×	121 1.2×	53 0.6×	14 0.5×	10 1.7×	8	388
R. Kumareswaran India	14	413 1.4×	121 1.2×	107 1.2×	7 0.2×	6 1.0×	21	431
Noboru Hayama Japan	10	310 1.1×	93 1.0×	85 1.0×	8 0.3×	9 1.5×	18	336
John B. Unger United States	7	290 1.0×	79 0.8×	65 0.7×	24 0.8×	7 1.2×	7	329
James Muir United Kingdom	11	496 1.7×	49 0.5×	64 0.7×	14 0.5×	16 2.7×	15	535
Tim Dickner Germany	4	359 1.3×	50 0.5×	117 1.3×	9 0.3×	9 1.5×	5	366
Zhiwei Ma United States	5	408 1.4×	103 1.1×	41 0.5×	15 0.5×	25 4.2×	5	439
Simon J. Harwood United Kingdom	7	395 1.4×	173 1.8×	101 1.2×	10 0.3×	9 1.5×	9	409
GuangRong Peh Singapore	8	481 1.7×	64 0.7×	59 0.7×	9 0.3×	11 1.8×	14	518
Reginald L. Tennyson United States	4	315 1.1×	61 0.6×	59 0.7×	11 0.4×	24 4.0×	5	334

Countries citing papers authored by Stephen Challenger

Since Specialization

Citations

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

Fields of papers citing papers by Stephen Challenger

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Stephen Challenger

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

All Works

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11 of 11 papers shown

Challenger, Stephen, et al.. (2011). A Simplified Process for the Manufacture of Imagabalin Hydrochloride (PD-0332334), an α2δ-Ligand for the Treatment of Generalised Anxiety Disorder. Organic Process Research & Development. 15(6). 1358–1364. 10 indexed citations

Challenger, Stephen, et al.. (2011). The Development of a Practical Multikilogram Synthesis of the Chiral β-Amino Acid Imagabalin Hydrochloride (PD-0332334) via Asymmetric Hydrogenation. Organic Process Research & Development. 15(5). 1172–1177. 15 indexed citations

Challenger, Stephen, et al.. (2008). Development of a Scaleable Process for the Synthesis of the A2a Agonist, UK-371,104. Organic Process Research & Development. 12(4). 575–583. 20 indexed citations

Challenger, Stephen, et al.. (2005). An Efficient and Scalable Synthesis of the Endothelin Antagonists UK-350,926 and UK-349,862 Using a Dynamic Resolution Process. Organic Process Research & Development. 9(5). 663–669. 17 indexed citations

Challenger, Stephen, Andrew Derrick, Shaun Fillery, et al.. (2004). Amination of ethers using chloramine-T hydrate and a copper(i) catalyst. Organic & Biomolecular Chemistry. 3(1). 107–107. 60 indexed citations

Challenger, Stephen, et al.. (2003). Asymmetric Synthesis of an MMP-3 Inhibitor Incorporating a 2-Alkyl Succinate Motif. Organic Process Research & Development. 7(3). 362–368. 13 indexed citations

Challenger, Stephen, et al.. (2002). THE SYNTHESIS OFGEM-CYCLOPENTYL SUBSTITUTED GLUTARATES VIA THE OXIDATIVE RING CONTRACTION OF 2-ACETYLCYCLOHEXANONES. Synthetic Communications. 32(19). 2911–2918. 2 indexed citations

Challenger, Stephen, et al.. (1999). Stereoselective synthesis of a candoxatril intermediate asymmetric hydrogenation. Tetrahedron Letters. 40(11). 2187–2190. 13 indexed citations

Burk, Mark J., Frank Bienewald, Stephen Challenger, Andrew Derrick, & James A. Ramsden. (1999). Me-DuPHOS-Rh-Catalyzed Asymmetric Synthesis of the Pivotal Glutarate Intermediate for Candoxatril. The Journal of Organic Chemistry. 64(9). 3290–3298. 43 indexed citations

10.

Taylor, Paul C., et al.. (1998). A Simple Copper Catalyst for Both Aziridination of Alkenes and Amination of Activated Hydrocarbons with Chloramine-T Trihydrate. The Journal of Organic Chemistry. 63(25). 9569–9571. 125 indexed citations

11.

Procter, Garry, et al.. (1990). 1,6-Anhydro-β-d-glucopyranose in organic synthesis: preparation of a fragment for the synthesis of rosaramycin. Carbohydrate Research. 202. 81–92. 10 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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