John A. Ragan - Concepedia

Author

John A. Ragan

Pfizer (United States)ORCID

Also Known As

J. A. RAGAN, J. A. Ragan, John A Ragan, John A. Ragan, John A. Ragan, John. A. Ragan, Ragan, J.A.

Publications

2.3K

Citations

H-Index

Concepts

All Affiliations

Pfizer (United States)Pfizer (Ireland)Pfizer (United Kingdom)

About

John A. Ragan is an author at Pfizer (United States) specializing in organic chemistry, natural sciences, and chemistry.

Top Concepts

#	Concept	H-Index	Publications	Citations
1	Natural Sciences	15	19	795
2	Engineering	13	16	679
3	Biochemistry	11	13	592
4	Medicine	10	10	341
5	Biology	1	1	42

John A. Ragan

Publications

1.3K

Citations

H-Index

Page 1

	Year	Citations
Survey of GMP Bulk Reactions Run in a Research Facility between 1985 and 2002 Robert W. Dugger, John A. Ragan, David H. Brown Ripin Organic Process Research & Development Chemical EngineeringEngineeringChemical AnalysisReaction EngineeringReaction Process	2005	304
Total synthesis of FK506 and an FKBP probe reagent, [C(8),C(9)-13C2]-FK506 Masashi Nakatsuka, John A. Ragan, Tarek Sammakia, Journal of the American Chemical Society Molecular SciencesChemical MeasurementChemical AnalysisBiochemistryDonut Icon	1990	258
Commercial Route Research and Development for SGLT2 Inhibitor Candidate Ertugliflozin Paul Bowles, Steven J. Brenek, Stéphane Caron, Organic Process Research & Development Combinatorial ChemistryBioorganic ChemistryOrganic ChemistryPharmacotherapyMethylpiperazine Amide	2013	66
Cross-Coupling Methods for the Large-Scale Preparation of an Imidazole−Thienopyridine: Synthesis of [2-(3-Methyl-3H-imidazol-4-yl)- thieno[3,2-<i>b</i>]pyridin-7-yl]-(2-methyl-1H-indol-5-yl)-amine John A. Ragan, Jeffrey W. Raggon, Paul D. Hill, Organic Process Research & Development Cross-coupling MethodsOrganostannane ReagentDiversity Oriented SynthesisEngineeringCross-coupling Reaction	2003	59
Studies relating to the synthesis of the immunosuppressive agent FK-506: coupling of fragments via a stereoselective trisubstituted olefin forming reaction sequence A. Brian Jones, Masahiko Yamaguchi, Arthur D. Patten, The Journal of Organic Chemistry Altmetric Attention ScoreOrganic ChemistryPharmaceutical ChemistryReaction SequenceMedicinal Chemistry	1989	58
Safe Execution of a Large-Scale Ozonolysis: Preparation of the Bisulfite Adduct of 2-Hydroxyindan-2-carboxaldehyde and Its Utility in a Reductive Amination John A. Ragan, David J. am Ende, Steven J. Brenek, Organic Process Research & Development EngineeringSafe ExecutionOrganic ChemistryChemistryDesulfurization	2003	54
Pyrazolinone-piperidine dipeptide growth hormone secretagogues (GHSs) Philip A. Carpino, Bruce A. Lefker, Steven M. Toler, Bioorganic & Medicinal Chemistry Growth HormoneMedicinePhysiologyEndocrinologyPharmacology	2003	47
Daphniphyllum alkaloids. 12. A proposed biosynthesis of the pentacylic skeleton. proto-Daphniphylline Clayton H. Heathcock, Serge R. Piettre, Roger B. Ruggeri, The Journal of Organic Chemistry BiologyBiosynthesisBioorganic ChemistryPentacylic SkeletonBiochemistry	1992	42
Studies on the Alkylation of Chiral, Non-racemic, Tricyclic Pyrrolidinones John A. Ragan, Michelle C. Claffey Heterocycles EngineeringHeterocyclicTricyclic PyrrolidinonesCyclic Keto AcidsAmino Alcohol	1995	40
Development of the Commercial Manufacturing Process for Nirmatrelvir in 17 Months Christophe Allais, Christina G. Connor, Nga M., ACS Central Science	2023	36

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