John A. Ragan

2.3k total citations · 1 hit paper
33 papers, 1.7k citations indexed

About

John A. Ragan is a scholar working on Organic Chemistry, Molecular Biology and Spectroscopy. According to data from OpenAlex, John A. Ragan has authored 33 papers receiving a total of 1.7k indexed citations (citations by other indexed papers that have themselves been cited), including 24 papers in Organic Chemistry, 7 papers in Molecular Biology and 3 papers in Spectroscopy. Recurrent topics in John A. Ragan's work include Asymmetric Synthesis and Catalysis (8 papers), Synthetic Organic Chemistry Methods (6 papers) and Chemical Synthesis and Reactions (4 papers). John A. Ragan is often cited by papers focused on Asymmetric Synthesis and Catalysis (8 papers), Synthetic Organic Chemistry Methods (6 papers) and Chemical Synthesis and Reactions (4 papers). John A. Ragan collaborates with scholars based in United States and United Kingdom. John A. Ragan's co-authors include David H. Brown Ripin, Robert W. Dugger, Stéphane Caron, Sally Gut Ruggeri, Stuart L. Schreiber, David B. Smith, Masashi Nakatsuka, David Uehling, Tarek Sammakia and Kelvin Cooper and has published in prestigious journals such as Chemical Reviews, Journal of the American Chemical Society and The Journal of Organic Chemistry.

In The Last Decade

John A. Ragan

32 papers receiving 1.6k 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.

Large-Scale Oxidations in the Pharmaceutical Industry

2006 716 citations Stéphane Caron, Robert W. Dugger et al. Chemical Reviews profile →

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
John A. Ragan United States	16	1.3k	340	311	262	160	33	1.7k
Masayuki Kirihara Japan	25	1.7k 1.3×	337 1.0×	315 1.0×	291 1.1×	107 0.7×	108	2.1k
Yuki Yabe Japan	17	1.7k 1.3×	241 0.7×	664 2.1×	161 0.6×	110 0.7×	21	2.1k
Ralph Nicholas Salvatore United States	19	1.4k 1.0×	419 1.2×	755 2.4×	124 0.5×	135 0.8×	33	1.9k
Kurt Lorenz United States	13	1.4k 1.0×	735 2.2×	476 1.5×	157 0.6×	187 1.2×	24	1.8k
Dilip Konwar India	23	1.5k 1.1×	262 0.8×	264 0.8×	201 0.8×	91 0.6×	64	1.7k
Peter Dinér Sweden	21	1.5k 1.1×	413 1.2×	390 1.3×	105 0.4×	51 0.3×	56	1.9k
Jamie A. Leitch United Kingdom	26	2.4k 1.8×	337 1.0×	629 2.0×	162 0.6×	145 0.9×	43	2.8k
Andrea Penoni Italy	27	1.7k 1.3×	210 0.6×	321 1.0×	224 0.9×	130 0.8×	73	2.0k
Chhanda Mukhopadhyay India	28	2.5k 1.9×	510 1.5×	190 0.6×	340 1.3×	77 0.5×	190	2.9k
Jonathan W. Burton United Kingdom	27	1.4k 1.0×	323 0.9×	347 1.1×	104 0.4×	102 0.6×	69	1.8k

Countries citing papers authored by John A. Ragan

Since Specialization

Citations

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

Fields of papers citing papers by John A. Ragan

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by John A. Ragan. 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 John A. Ragan. The network helps show where John A. Ragan may publish in the future.

Co-authorship network of co-authors of John A. Ragan

This figure shows the co-authorship network connecting the top 25 collaborators of John A. Ragan. A scholar is included among the top collaborators of John A. Ragan 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 John A. Ragan. John A. Ragan 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

Yu, Weili, Ravi Shanker, Pratik Doshi, et al.. (2025). The unprecedented Paxlovid journey from milligrams to millions of patient doses during the Covid-19 pandemic. Communications Medicine. 5(1). 80–80. 4 indexed citations

Allais, Christophe, Aaron F. Baldwin, Hugh J. Clarke, et al.. (2024). Building and Evolving a Chiral Control Strategy for Accelerated COVID Programs. Organic Process Research & Development. 28(12). 4444–4454. 1 indexed citations

Ragan, John A. & Spencer D. Dreher. (2019). Excellence in Industrial Organic Synthesis 2019: The Past, Present, and Future. The Journal of Organic Chemistry. 84(8). 4577–4579. 3 indexed citations

M., Nga, et al.. (2015). Method development and validation of arene substituted regioisomers in a pharmaceutical candidate by high temperature GC-FID. Journal of Pharmaceutical and Biomedical Analysis. 109. 74–78.

Peng, Zhihui, John A. Ragan, Eric M. Cordi, et al.. (2013). Synthesis of Filibuvir. Part II. Second-Generation Synthesis of a 6,6-Disubstituted 2H-Pyranone via Dieckmann Cyclization of a β-Acetoxy Ester. Organic Process Research & Development. 18(1). 36–44. 7 indexed citations

Ragan, John A., et al.. (2010). Development of a Practical and Efficient Synthesis of Chloromethyl 2-Ethoxy-2-methylpropanoate. Organic Process Research & Development. 14(6). 1402–1406. 6 indexed citations

Ragan, John A., Frank R. Busch, Eric M. Cordi, et al.. (2008). Development of a Practical and Efficient Synthesis of CP-945,598-01, a CB₁ Antagonist for the Treatment of Obesity. Organic Process Research & Development. 13(2). 186–197. 9 indexed citations

Caron, Stéphane, Robert W. Dugger, Sally Gut Ruggeri, John A. Ragan, & David H. Brown Ripin. (2006). Large-Scale Oxidations in the Pharmaceutical Industry. Chemical Reviews. 106(7). 2943–2989. 716 indexed citations breakdown →

Vetelino, Michael G., Michael Wirtz, Paige R. Brooks, et al.. (2006). Enantioselective Synthesis of Nicotinic Receptor Probe 7,8-Difluoro-1,2,3,4,5,6- hexahydro-1,5-methano-3-benzazocine. Organic Letters. 8(26). 5947–5950. 21 indexed citations

10.

Caron, Stéphane, Robert W. Dugger, Sally Gut Ruggeri, John A. Ragan, & David H. Brown Ripin. (2006). Large‐Scale Oxidations in the Pharmaceutical Industry. ChemInform. 37(41). 3 indexed citations

11.

Ragan, John A., et al.. (2004). Synthesis ofN,N-Dimethylpropanediamide and its Utility for the Preparation of 2-(Acetamidomethyl)-4-aryloxazoles. Synlett. 1334–1338. 3 indexed citations

12.

Couturier, Michel, Fréderic Ménard, John A. Ragan, et al.. (2004). Phosphine-Mediated [4 + 2] Annulation of Bis(enones): A Lewis Base Catalyzed “Mock Diels−Alder” Reaction. Organic Letters. 6(11). 1857–1860. 28 indexed citations

13.

Abdel‐Magid, Ahmed F. & John A. Ragan. (2003). Chemical Process Research: The Art of Practical Organic Synthesis. Medical Entomology and Zoology. 7 indexed citations

14.

Bowles, Paul, Michel Couturier, Gregory L. Karrick, et al.. (2003). Synthesis and Purification of 6-Ethoxy-4-oxo-1,4-dihydro-[1,5]naphthyridine-3-carboxylic Acid Benzylamide. Organic Process Research & Development. 7(6). 873–878. 13 indexed citations

15.

Ragan, John A., et al.. (2002). Ullman methoxylation in the presence of a 2,5-dimethylpyrrole-blocked aniline: Preparation of 2-fluoro-4-methoxyaniline (benzenamine, 2-fluoro-4-methoxy-). Organic Syntheses. 78. 63–72. 3 indexed citations

16.

Ragan, John A., Jerry A. Murry, Brian P. Jones, et al.. (2001). Investigation of Methods for Seven-Membered Ring Synthesis: A Practical Synthesis of 4-Oxo-5,6,7,8-tetrahydro-4H-cyclohepta[b]furan-3-carboxylic Acid. Organic Process Research & Development. 5(5). 498–507. 14 indexed citations

17.

Ragan, John A. & David J. am Ende. (2000). Shock Sensitivity of a Vinamidinium Bis-Perchlorate Reagent and Demonstration of a Lower Energy Alternative. Synlett. 2000(8). 1172–1174. 3 indexed citations

18.

Ragan, John A., et al.. (1998). 2,5-Dimethylpyrrole Protection Facilitates Copper(I)-Mediated Methoxylations of Aryl Iodides in the Presence of Anilines. Synthesis. 1998(11). 1599–1603. 13 indexed citations

19.

Ragan, John A., Teresa W. Makowski, David J. am Ende, et al.. (1998). A Practical Synthesis of Cycloheptane-1,3-dione. Organic Process Research & Development. 2(6). 379–381. 23 indexed citations

20.

Ragan, John A. & Kelvin Cooper. (1994). Synthesis of a galactose-fucose disaccharide mimic of sialyl Lewis X. Bioorganic & Medicinal Chemistry Letters. 4(21). 2563–2566. 27 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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