1
|
Allais C, Connor C, Do NM, Kulkarni S, Lee J, Lee T, McInturff E, Piper J, Place DW, Ragan JA, Weekly RM. Development of the Commercial Manufacturing Process for Nirmatrelvir in 17 Months. ACS Cent Sci 2023; 9:849-857. [PMID: 37252346 PMCID: PMC10069651 DOI: 10.1021/acscentsci.3c00145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The advancement of nirmatrelvir, the active ingredient in Paxlovid, from discovery to emergency use authorization was achieved in just 17 months, requiring an unprecedented rate of chemical process development.
Collapse
Affiliation(s)
- Christophe Allais
- Pfizer Worldwide Research & Development,
Chemical Research & Development, Groton, Connecticut 06355, United States
| | - Christina
G. Connor
- Pfizer Worldwide Research & Development,
Chemical Research & Development, Groton, Connecticut 06355, United States
| | - Nga M. Do
- Pfizer Worldwide Research & Development,
Chemical Research & Development, Groton, Connecticut 06355, United States
| | - Samir Kulkarni
- Pfizer Worldwide Research & Development,
Chemical Research & Development, Groton, Connecticut 06355, United States
| | - Johnny
W. Lee
- Pfizer Worldwide Research & Development,
Chemical Research & Development, Groton, Connecticut 06355, United States
| | - Taegyo Lee
- Pfizer Worldwide Research & Development,
Chemical Research & Development, Groton, Connecticut 06355, United States
| | - Emma McInturff
- Pfizer Worldwide Research & Development,
Chemical Research & Development, Groton, Connecticut 06355, United States
| | - Jared Piper
- Pfizer Worldwide Research & Development,
Chemical Research & Development, Groton, Connecticut 06355, United States
| | - Dave W. Place
- Pfizer Worldwide Research & Development,
Chemical Research & Development, Groton, Connecticut 06355, United States
| | - John A. Ragan
- Pfizer Worldwide Research & Development,
Chemical Research & Development, Groton, Connecticut 06355, United States
| | - R. Matt Weekly
- Pfizer Worldwide Research & Development,
Chemical Research & Development, Groton, Connecticut 06355, United States
| |
Collapse
|
2
|
Ragan JA, Chen K, Blackmond DG, Tadross PM. Excellence in Industrial Organic Synthesis 2021. Org Process Res Dev 2022. [DOI: 10.1021/acs.oprd.2c00038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- John A. Ragan
- Chemical Research & Development, Pfizer Global Research & Development, Eastern Point Road, Groton, Connecticut 06340, United States
| | - Ke Chen
- Process Research & Development, WuXi Apptec, Fute Zhong Road, Waigaoqiao, Shanghai 20013, China
| | - Donna G. Blackmond
- Department of Chemistry, Scripps Research, La Jolla, California 92037, United States
| | - Pamela M. Tadross
- Pharmaceutical Technical Operations, Technical Product Stewardship, Merck & Co., 10 Lakewood Road, Natick, Massachusetts 01760, United States
| |
Collapse
|
3
|
Ragan JA, Chen K, Blackmond DG, Tadross PM. Excellence in Industrial Organic Synthesis 2021. J Org Chem 2022; 87:1879. [PMID: 35176854 DOI: 10.1021/acs.joc.2c00245] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- John A Ragan
- Chemical Research & Development, Pfizer Global Research & Development, Eastern Point Road, Groton, Connecticut 06340, United States
| | - Ke Chen
- Process Research & Development, WuXi Apptec, Fute Zhong Road, Waigaoqiao, Shanghai 20013, China
| | - Donna G Blackmond
- Department of Chemistry, Scripps Research, La Jolla, California 92037, United States
| | - Pamela M Tadross
- Pharmaceutical Technical Operations, Technical Product Stewardship, Merck & Co., 10 Lakewood Road, Natick, Massachusetts 01760, United States
| |
Collapse
|
4
|
Affiliation(s)
- John A Ragan
- Chemical Research & Development , Pfizer Global Research & Development , Eastern Point Road , Groton , Connecticut 06340 , United States
| | - Spencer D Dreher
- Discovery Chemistry Merck & Co., Inc. , 2000 Galloping Hill Road , Kenilworth , New Jersey 07033 , United States
| |
Collapse
|
5
|
Salisbury JJ, Do NM, Ragan JA. Method development and validation of arene substituted regioisomers in a pharmaceutical candidate by high temperature GC-FID. J Pharm Biomed Anal 2015; 109:74-8. [PMID: 25767904 DOI: 10.1016/j.jpba.2015.02.033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2014] [Revised: 02/16/2015] [Accepted: 02/17/2015] [Indexed: 10/24/2022]
Abstract
This paper describes the development and validation of a high temperature gas chromatography flame ionization detection (HTGC-FID) method for the purity evaluation of arene substituted regioisomers in a key starting material of a pharmaceutical candidate in Phase 3 studies. The chromatographic conditions of the method employ a (5%-phenyl)-methylpolysiloxane packed column (30m×0.25mm) at a constant flow of 1.0mLmin(-1) with a gradient temperature program from 150°C to 400°C with injector and detector temperatures of 300°C and 340°C, respectively. The calibration curve for the desired product (r=0.9999) was assessed for five points in the range from approximately 1.0μgmL(-1) to 40μgmL(-1). The precision (% RSD) of the method was calculated for six replicate injections and found to be 0.81%. The limits of detection and quantitation were determined to be 0.06 and 0.20μgmL(-1), respectively.
Collapse
Affiliation(s)
- John J Salisbury
- Analytical Research and Development, Pfizer Worldwide Research and Development, Eastern Point Road, Groton, CT 06340, USA.
| | - Nga M Do
- Chemical Research and Development, Pfizer Worldwide Research and Development, Eastern Point Road, Groton, CT 06340, USA
| | - John A Ragan
- Chemical Research and Development, Pfizer Worldwide Research and Development, Eastern Point Road, Groton, CT 06340, USA
| |
Collapse
|
6
|
Bowles P, Brenek SJ, Caron S, Do NM, Drexler MT, Duan S, Dubé P, Hansen EC, Jones BP, Jones KN, Ljubicic TA, Makowski TW, Mustakis J, Nelson JD, Olivier M, Peng Z, Perfect HH, Place DW, Ragan JA, Salisbury JJ, Stanchina CL, Vanderplas BC, Webster ME, Weekly RM. Commercial Route Research and Development for SGLT2 Inhibitor Candidate Ertugliflozin. Org Process Res Dev 2014. [DOI: 10.1021/op4002802] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Paul Bowles
- Chemical Research and Development, ‡Analytical Research and Development, Pfizer Worldwide Research and Development, Eastern Point Road, Groton, Connecticut 06340, United States
| | - Steven J. Brenek
- Chemical Research and Development, ‡Analytical Research and Development, Pfizer Worldwide Research and Development, Eastern Point Road, Groton, Connecticut 06340, United States
| | - Stéphane Caron
- Chemical Research and Development, ‡Analytical Research and Development, Pfizer Worldwide Research and Development, Eastern Point Road, Groton, Connecticut 06340, United States
| | - Nga M. Do
- Chemical Research and Development, ‡Analytical Research and Development, Pfizer Worldwide Research and Development, Eastern Point Road, Groton, Connecticut 06340, United States
| | - Michele T. Drexler
- Chemical Research and Development, ‡Analytical Research and Development, Pfizer Worldwide Research and Development, Eastern Point Road, Groton, Connecticut 06340, United States
| | - Shengquan Duan
- Chemical Research and Development, ‡Analytical Research and Development, Pfizer Worldwide Research and Development, Eastern Point Road, Groton, Connecticut 06340, United States
| | - Pascal Dubé
- Chemical Research and Development, ‡Analytical Research and Development, Pfizer Worldwide Research and Development, Eastern Point Road, Groton, Connecticut 06340, United States
| | - Eric C. Hansen
- Chemical Research and Development, ‡Analytical Research and Development, Pfizer Worldwide Research and Development, Eastern Point Road, Groton, Connecticut 06340, United States
| | - Brian P. Jones
- Chemical Research and Development, ‡Analytical Research and Development, Pfizer Worldwide Research and Development, Eastern Point Road, Groton, Connecticut 06340, United States
| | - Kris N. Jones
- Chemical Research and Development, ‡Analytical Research and Development, Pfizer Worldwide Research and Development, Eastern Point Road, Groton, Connecticut 06340, United States
| | - Tomislav A. Ljubicic
- Chemical Research and Development, ‡Analytical Research and Development, Pfizer Worldwide Research and Development, Eastern Point Road, Groton, Connecticut 06340, United States
| | - Teresa W. Makowski
- Chemical Research and Development, ‡Analytical Research and Development, Pfizer Worldwide Research and Development, Eastern Point Road, Groton, Connecticut 06340, United States
| | - Jason Mustakis
- Chemical Research and Development, ‡Analytical Research and Development, Pfizer Worldwide Research and Development, Eastern Point Road, Groton, Connecticut 06340, United States
| | - Jade D. Nelson
- Chemical Research and Development, ‡Analytical Research and Development, Pfizer Worldwide Research and Development, Eastern Point Road, Groton, Connecticut 06340, United States
| | - Mark Olivier
- Chemical Research and Development, ‡Analytical Research and Development, Pfizer Worldwide Research and Development, Eastern Point Road, Groton, Connecticut 06340, United States
| | - Zhihui Peng
- Chemical Research and Development, ‡Analytical Research and Development, Pfizer Worldwide Research and Development, Eastern Point Road, Groton, Connecticut 06340, United States
| | - Hahdi H. Perfect
- Chemical Research and Development, ‡Analytical Research and Development, Pfizer Worldwide Research and Development, Eastern Point Road, Groton, Connecticut 06340, United States
| | - David W. Place
- Chemical Research and Development, ‡Analytical Research and Development, Pfizer Worldwide Research and Development, Eastern Point Road, Groton, Connecticut 06340, United States
| | - John A. Ragan
- Chemical Research and Development, ‡Analytical Research and Development, Pfizer Worldwide Research and Development, Eastern Point Road, Groton, Connecticut 06340, United States
| | - John J. Salisbury
- Chemical Research and Development, ‡Analytical Research and Development, Pfizer Worldwide Research and Development, Eastern Point Road, Groton, Connecticut 06340, United States
| | - Corey L. Stanchina
- Chemical Research and Development, ‡Analytical Research and Development, Pfizer Worldwide Research and Development, Eastern Point Road, Groton, Connecticut 06340, United States
| | - Brian C. Vanderplas
- Chemical Research and Development, ‡Analytical Research and Development, Pfizer Worldwide Research and Development, Eastern Point Road, Groton, Connecticut 06340, United States
| | - Mark E. Webster
- Chemical Research and Development, ‡Analytical Research and Development, Pfizer Worldwide Research and Development, Eastern Point Road, Groton, Connecticut 06340, United States
| | - R. Matt Weekly
- Chemical Research and Development, ‡Analytical Research and Development, Pfizer Worldwide Research and Development, Eastern Point Road, Groton, Connecticut 06340, United States
| |
Collapse
|
7
|
Peng Z, Ragan JA, Colon-Cruz R, Conway BG, Cordi EM, Leeman K, Letendre LJ, Ping LJ, Sieser JE, Singer RA, Sluggett GW, Strohmeyer H, Vanderplas BC, Blunt J, Mawby N, Meldrum K, Taylor S. Synthesis of Filibuvir. Part II. Second-Generation Synthesis of a 6,6-Disubstituted 2H-Pyranone via Dieckmann Cyclization of a β-Acetoxy Ester. Org Process Res Dev 2013. [DOI: 10.1021/op400236r] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Zhihui Peng
- Chemical Research & Development and ‡Analytical Research & Development, Pfizer Worldwide Research & Development, Eastern Point Road, Groton, Connecticut
| | - John A. Ragan
- Chemical Research & Development and ‡Analytical Research & Development, Pfizer Worldwide Research & Development, Eastern Point Road, Groton, Connecticut
| | - Roberto Colon-Cruz
- Chemical Research & Development and ‡Analytical Research & Development, Pfizer Worldwide Research & Development, Eastern Point Road, Groton, Connecticut
| | - Brian G. Conway
- Chemical Research & Development and ‡Analytical Research & Development, Pfizer Worldwide Research & Development, Eastern Point Road, Groton, Connecticut
| | - Eric M. Cordi
- Chemical Research & Development and ‡Analytical Research & Development, Pfizer Worldwide Research & Development, Eastern Point Road, Groton, Connecticut
| | - Kyle Leeman
- Chemical Research & Development and ‡Analytical Research & Development, Pfizer Worldwide Research & Development, Eastern Point Road, Groton, Connecticut
| | - Leo J. Letendre
- Chemical Research & Development and ‡Analytical Research & Development, Pfizer Worldwide Research & Development, Eastern Point Road, Groton, Connecticut
| | - Li-Jen Ping
- Chemical Research & Development and ‡Analytical Research & Development, Pfizer Worldwide Research & Development, Eastern Point Road, Groton, Connecticut
| | - Janice E. Sieser
- Chemical Research & Development and ‡Analytical Research & Development, Pfizer Worldwide Research & Development, Eastern Point Road, Groton, Connecticut
| | - Robert A. Singer
- Chemical Research & Development and ‡Analytical Research & Development, Pfizer Worldwide Research & Development, Eastern Point Road, Groton, Connecticut
| | - Gregory W. Sluggett
- Chemical Research & Development and ‡Analytical Research & Development, Pfizer Worldwide Research & Development, Eastern Point Road, Groton, Connecticut
| | - Holly Strohmeyer
- Chemical Research & Development and ‡Analytical Research & Development, Pfizer Worldwide Research & Development, Eastern Point Road, Groton, Connecticut
| | - Brian C. Vanderplas
- Chemical Research & Development and ‡Analytical Research & Development, Pfizer Worldwide Research & Development, Eastern Point Road, Groton, Connecticut
| | - Jon Blunt
- Chemical Research & Development, Process Development Facility Ramsgate Road, Sandwich, Kent, United Kingdom
| | - Nicola Mawby
- Chemical Research & Development, Process Development Facility Ramsgate Road, Sandwich, Kent, United Kingdom
| | - Kevin Meldrum
- Chemical Research & Development, Process Development Facility Ramsgate Road, Sandwich, Kent, United Kingdom
| | - Stuart Taylor
- Chemical Research & Development, Process Development Facility Ramsgate Road, Sandwich, Kent, United Kingdom
| |
Collapse
|
8
|
Singer RA, Ragan JA, Bowles P, Chisowa E, Conway BG, Cordi EM, Leeman KR, Letendre LJ, Sieser JE, Sluggett GW, Stanchina CL, Strohmeyer H, Blunt J, Taylor S, Byrne C, Lynch D, Mullane S, O’Sullivan MM, Whelan M. Synthesis of Filibuvir. Part I. Diastereoselective Preparation of a β-Hydroxy Alkynyl Oxazolidinone and Conversion to a 6,6-Disubstituted 2H-Pyranone. Org Process Res Dev 2013. [DOI: 10.1021/op4002356] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Robert A. Singer
- Chemical Research and Development and ‡Analytical Research
and Development, Pfizer Worldwide Research and Development, Eastern
Point Road, Groton, 06340 Connecticut
| | - John A. Ragan
- Chemical Research and Development and ‡Analytical Research
and Development, Pfizer Worldwide Research and Development, Eastern
Point Road, Groton, 06340 Connecticut
| | - Paul Bowles
- Chemical Research and Development and ‡Analytical Research
and Development, Pfizer Worldwide Research and Development, Eastern
Point Road, Groton, 06340 Connecticut
| | - Esmort Chisowa
- Chemical Research and Development and ‡Analytical Research
and Development, Pfizer Worldwide Research and Development, Eastern
Point Road, Groton, 06340 Connecticut
| | - Brian G. Conway
- Chemical Research and Development and ‡Analytical Research
and Development, Pfizer Worldwide Research and Development, Eastern
Point Road, Groton, 06340 Connecticut
| | - Eric M. Cordi
- Chemical Research and Development and ‡Analytical Research
and Development, Pfizer Worldwide Research and Development, Eastern
Point Road, Groton, 06340 Connecticut
| | - Kyle R. Leeman
- Chemical Research and Development and ‡Analytical Research
and Development, Pfizer Worldwide Research and Development, Eastern
Point Road, Groton, 06340 Connecticut
| | - Leo J. Letendre
- Chemical Research and Development and ‡Analytical Research
and Development, Pfizer Worldwide Research and Development, Eastern
Point Road, Groton, 06340 Connecticut
| | - Janice E. Sieser
- Chemical Research and Development and ‡Analytical Research
and Development, Pfizer Worldwide Research and Development, Eastern
Point Road, Groton, 06340 Connecticut
| | - Gregory W. Sluggett
- Chemical Research and Development and ‡Analytical Research
and Development, Pfizer Worldwide Research and Development, Eastern
Point Road, Groton, 06340 Connecticut
| | - Corey L. Stanchina
- Chemical Research and Development and ‡Analytical Research
and Development, Pfizer Worldwide Research and Development, Eastern
Point Road, Groton, 06340 Connecticut
| | - Holly Strohmeyer
- Chemical Research and Development and ‡Analytical Research
and Development, Pfizer Worldwide Research and Development, Eastern
Point Road, Groton, 06340 Connecticut
| | - Jon Blunt
- Chemical Research and Development, Pfizer Process Development Facility Ramsgate Road, Sandwich, Kent, U.K
| | - Stuart Taylor
- Chemical Research and Development, Pfizer Process Development Facility Ramsgate Road, Sandwich, Kent, U.K
| | - Ciaran Byrne
- Pfizer Global Supply, Ringaskiddy, Cork County, Ireland
| | - Denis Lynch
- Pfizer Global Supply, Ringaskiddy, Cork County, Ireland
| | | | | | | |
Collapse
|
9
|
Ragan JA, Ide ND, Cai W, Cawley JJ, Colon-Cruz R, Kumar R, Peng Z, Vanderplas BC. Development of a Practical and Efficient Synthesis of Chloromethyl 2-Ethoxy-2-methylpropanoate. Org Process Res Dev 2010. [DOI: 10.1021/op1002038] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- John A. Ragan
- Chemical Research & Development, Pfizer Worldwide Research & Development, Eastern Point Road, Groton, Connecticut 06340, United States
| | - Nathan D. Ide
- Chemical Research & Development, Pfizer Worldwide Research & Development, Eastern Point Road, Groton, Connecticut 06340, United States
| | - Weiling Cai
- Chemical Research & Development, Pfizer Worldwide Research & Development, Eastern Point Road, Groton, Connecticut 06340, United States
| | - James J. Cawley
- Chemical Research & Development, Pfizer Worldwide Research & Development, Eastern Point Road, Groton, Connecticut 06340, United States
| | - Roberto Colon-Cruz
- Chemical Research & Development, Pfizer Worldwide Research & Development, Eastern Point Road, Groton, Connecticut 06340, United States
| | - Rajesh Kumar
- Chemical Research & Development, Pfizer Worldwide Research & Development, Eastern Point Road, Groton, Connecticut 06340, United States
| | - Zhihui Peng
- Chemical Research & Development, Pfizer Worldwide Research & Development, Eastern Point Road, Groton, Connecticut 06340, United States
| | - Brian C. Vanderplas
- Chemical Research & Development, Pfizer Worldwide Research & Development, Eastern Point Road, Groton, Connecticut 06340, United States
| |
Collapse
|
10
|
Brandt TA, Caron S, Damon DB, DiBrino J, Ghosh A, Griffith DA, Kedia S, Ragan JA, Rose PR, Vanderplas BC, Wei L. Development of two synthetic routes to CE-178,253, a CB1 antagonist for the treatment of obesity. Tetrahedron 2009. [DOI: 10.1016/j.tet.2008.10.067] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
11
|
Chouai A, Venditto VJ, Simanek EE, Vanderplas BC, Ragan JA. LARGE SCALE, GREEN SYNTHESIS OF A GENERATION-1 MELAMINE (TRIAZINE) DENDRIMER. Organic Synth 2009; 86:151. [PMID: 20072717 PMCID: PMC2805095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Grants] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
|
12
|
Chouai A, Venditto VJ, Simanek EE, McDermott RE, Ragan JA. SYNTHESIS OF 2-[3,3'-DI-(TERT-BUTOXYCARBONYL)-AMINODIPROPYLAMINE]-4,6,-DICHLORO-1,3,5-TRIAZINE AS A MONOMER AND 1,3,5-[TRIS-PIPERAZINE]-TRIAZINE AS A CORE FOR THE LARGE SCALE SYNTHESIS OF MELAMINE (TRIAZINE) DENDRIMERS. Organic Synth 2009; 86:141-150. [PMID: 19784386 PMCID: PMC2750910] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Grants] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
|
13
|
Ragan JA, Bourassa DE, Blunt J, Breen D, Busch FR, Cordi EM, Damon DB, Do N, Engtrakul A, Lynch D, McDermott RE, Mongillo JA, O’Sullivan MM, Rose PR, Vanderplas BC. Development of a Practical and Efficient Synthesis of CP-945,598-01, a CB1 Antagonist for the Treatment of Obesity. Org Process Res Dev 2008. [DOI: 10.1021/op800255j] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- John A. Ragan
- Chemical Research and Development, Materials Science, and Analytical Research and Development, Pfizer Global Research and Development, Eastern Point Road, Groton, Connecticut 06335, U.S.A., Supply Chain, Pfizer Ltd., Ramsgate Road, Sandwich, Kent CT139NJ, U.K., and Pfizer Global Manufacturing, Ringaskiddy API Plant, County Cork, Ireland
| | - Dennis E. Bourassa
- Chemical Research and Development, Materials Science, and Analytical Research and Development, Pfizer Global Research and Development, Eastern Point Road, Groton, Connecticut 06335, U.S.A., Supply Chain, Pfizer Ltd., Ramsgate Road, Sandwich, Kent CT139NJ, U.K., and Pfizer Global Manufacturing, Ringaskiddy API Plant, County Cork, Ireland
| | - Jon Blunt
- Chemical Research and Development, Materials Science, and Analytical Research and Development, Pfizer Global Research and Development, Eastern Point Road, Groton, Connecticut 06335, U.S.A., Supply Chain, Pfizer Ltd., Ramsgate Road, Sandwich, Kent CT139NJ, U.K., and Pfizer Global Manufacturing, Ringaskiddy API Plant, County Cork, Ireland
| | - Darragh Breen
- Chemical Research and Development, Materials Science, and Analytical Research and Development, Pfizer Global Research and Development, Eastern Point Road, Groton, Connecticut 06335, U.S.A., Supply Chain, Pfizer Ltd., Ramsgate Road, Sandwich, Kent CT139NJ, U.K., and Pfizer Global Manufacturing, Ringaskiddy API Plant, County Cork, Ireland
| | - Frank R. Busch
- Chemical Research and Development, Materials Science, and Analytical Research and Development, Pfizer Global Research and Development, Eastern Point Road, Groton, Connecticut 06335, U.S.A., Supply Chain, Pfizer Ltd., Ramsgate Road, Sandwich, Kent CT139NJ, U.K., and Pfizer Global Manufacturing, Ringaskiddy API Plant, County Cork, Ireland
| | - Eric M. Cordi
- Chemical Research and Development, Materials Science, and Analytical Research and Development, Pfizer Global Research and Development, Eastern Point Road, Groton, Connecticut 06335, U.S.A., Supply Chain, Pfizer Ltd., Ramsgate Road, Sandwich, Kent CT139NJ, U.K., and Pfizer Global Manufacturing, Ringaskiddy API Plant, County Cork, Ireland
| | - David B. Damon
- Chemical Research and Development, Materials Science, and Analytical Research and Development, Pfizer Global Research and Development, Eastern Point Road, Groton, Connecticut 06335, U.S.A., Supply Chain, Pfizer Ltd., Ramsgate Road, Sandwich, Kent CT139NJ, U.K., and Pfizer Global Manufacturing, Ringaskiddy API Plant, County Cork, Ireland
| | - Nga Do
- Chemical Research and Development, Materials Science, and Analytical Research and Development, Pfizer Global Research and Development, Eastern Point Road, Groton, Connecticut 06335, U.S.A., Supply Chain, Pfizer Ltd., Ramsgate Road, Sandwich, Kent CT139NJ, U.K., and Pfizer Global Manufacturing, Ringaskiddy API Plant, County Cork, Ireland
| | - Alanya Engtrakul
- Chemical Research and Development, Materials Science, and Analytical Research and Development, Pfizer Global Research and Development, Eastern Point Road, Groton, Connecticut 06335, U.S.A., Supply Chain, Pfizer Ltd., Ramsgate Road, Sandwich, Kent CT139NJ, U.K., and Pfizer Global Manufacturing, Ringaskiddy API Plant, County Cork, Ireland
| | - Denis Lynch
- Chemical Research and Development, Materials Science, and Analytical Research and Development, Pfizer Global Research and Development, Eastern Point Road, Groton, Connecticut 06335, U.S.A., Supply Chain, Pfizer Ltd., Ramsgate Road, Sandwich, Kent CT139NJ, U.K., and Pfizer Global Manufacturing, Ringaskiddy API Plant, County Cork, Ireland
| | - Ruth E. McDermott
- Chemical Research and Development, Materials Science, and Analytical Research and Development, Pfizer Global Research and Development, Eastern Point Road, Groton, Connecticut 06335, U.S.A., Supply Chain, Pfizer Ltd., Ramsgate Road, Sandwich, Kent CT139NJ, U.K., and Pfizer Global Manufacturing, Ringaskiddy API Plant, County Cork, Ireland
| | - Joseph A. Mongillo
- Chemical Research and Development, Materials Science, and Analytical Research and Development, Pfizer Global Research and Development, Eastern Point Road, Groton, Connecticut 06335, U.S.A., Supply Chain, Pfizer Ltd., Ramsgate Road, Sandwich, Kent CT139NJ, U.K., and Pfizer Global Manufacturing, Ringaskiddy API Plant, County Cork, Ireland
| | - Maria M. O’Sullivan
- Chemical Research and Development, Materials Science, and Analytical Research and Development, Pfizer Global Research and Development, Eastern Point Road, Groton, Connecticut 06335, U.S.A., Supply Chain, Pfizer Ltd., Ramsgate Road, Sandwich, Kent CT139NJ, U.K., and Pfizer Global Manufacturing, Ringaskiddy API Plant, County Cork, Ireland
| | - Peter R. Rose
- Chemical Research and Development, Materials Science, and Analytical Research and Development, Pfizer Global Research and Development, Eastern Point Road, Groton, Connecticut 06335, U.S.A., Supply Chain, Pfizer Ltd., Ramsgate Road, Sandwich, Kent CT139NJ, U.K., and Pfizer Global Manufacturing, Ringaskiddy API Plant, County Cork, Ireland
| | - Brian C. Vanderplas
- Chemical Research and Development, Materials Science, and Analytical Research and Development, Pfizer Global Research and Development, Eastern Point Road, Groton, Connecticut 06335, U.S.A., Supply Chain, Pfizer Ltd., Ramsgate Road, Sandwich, Kent CT139NJ, U.K., and Pfizer Global Manufacturing, Ringaskiddy API Plant, County Cork, Ireland
| |
Collapse
|
14
|
Bashore CG, Vetelino MG, Wirtz MC, Brooks PR, Frost HN, McDermott RE, Whritenour DC, Ragan JA, Rutherford JL, Makowski TW, Brenek SJ, Coe JW. Enantioselective Synthesis of Nicotinic Receptor Probe 7,8-Difluoro-1,2,3,4,5,6- hexahydro-1,5-methano-3-benzazocine. Org Lett 2006; 8:5947-50. [PMID: 17165901 DOI: 10.1021/ol0623062] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
[Structure: see text] The development of a concise enantioselective synthesis of nicotinic alkaloid 1 is presented. The route features the synthesis and use of a "stable" aliphatic triflate 21 in an alkylation step to generate Heck precursor 24 and an enantioselective cyclization to establish a compound with the key [3.2.1]-bicyclic core, 29.
Collapse
Affiliation(s)
- Crystal G Bashore
- Pfizer Global Research and Development, Groton Laboratories, Pfizer Inc., Groton, Connecticut 06340, USA
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
15
|
Affiliation(s)
- Stéphane Caron
- Chemical Research and Development, Pfizer Global Research Division, Pfizer Inc., Eastern Point Road, Groton, Connecticut 06340, USA
| | | | | | | | | |
Collapse
|
16
|
Affiliation(s)
- Robert W. Dugger
- Chemical Research and Development, Pfizer Global Research Division, Pfizer Inc., Eastern Point Road, Groton, Connecticut 06340, U.S.A
| | - John A. Ragan
- Chemical Research and Development, Pfizer Global Research Division, Pfizer Inc., Eastern Point Road, Groton, Connecticut 06340, U.S.A
| | - David H. Brown Ripin
- Chemical Research and Development, Pfizer Global Research Division, Pfizer Inc., Eastern Point Road, Groton, Connecticut 06340, U.S.A
| |
Collapse
|
17
|
Couturier M, Ménard F, Ragan JA, Riou M, Dauphin E, Andresen BM, Ghosh A, Dupont-Gaudet K, Girardin M. Phosphine-Mediated [4 + 2] Annulation of Bis(enones): A Lewis Base Catalyzed “Mock Diels−Alder” Reaction. Org Lett 2004; 6:1857-60. [PMID: 15151432 DOI: 10.1021/ol049392v] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Lewis-base-catalyzed cycloisomerization of bis(enones) to decalins has been demonstrated as an alternative to the traditional Lewis acid catalyzed Diels-Alder cycloaddition. In this process, a trialkylphosphine mediates both bond formation steps in two distinct catalytic cycles. The single-pot operation generates two carbon-carbon bonds and up to five contiguous stereocenters in one step, starting from achiral, aliphatic substrates; eight examples are provided. [reaction: see text]
Collapse
Affiliation(s)
- Michel Couturier
- Chemical Research and Development, Pfizer Global Research and Development, Eastern Point Road, P.O. Box 8013, Groton, CT 06340-8013, USA.
| | | | | | | | | | | | | | | | | |
Collapse
|
18
|
Ragan JA, Burmaster M, Hill PD. Synthesis ofN,N-Dimethylpropanediamide and its Utility for the Preparation of 2-(Acetamidomethyl)-4-aryloxazoles. Synlett 2004. [DOI: 10.1055/s-2004-825607] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
19
|
Beaudin J, Bourassa DE, Bowles P, Castaldi MJ, Clay R, Couturier MA, Karrick G, Makowski TW, McDermott RE, Meltz CN, Meltz M, Phillips JE, Ragan JA, Ripin DHB, Singer RA, Tucker JL, Wei L. Synthesis and Purification of 6-Ethoxy-4-oxo-1,4-dihydro-[1,5]naphthyridine-3-carboxylic Acid Benzylamide. Org Process Res Dev 2003. [DOI: 10.1021/op0341061] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Justin Beaudin
- Chemical Research and Development, Pfizer Global Research Division, Pfizer Inc., Eastern Point Road, Groton, Connecticut 06340, U.S.A
| | - Dennis E. Bourassa
- Chemical Research and Development, Pfizer Global Research Division, Pfizer Inc., Eastern Point Road, Groton, Connecticut 06340, U.S.A
| | - Paul Bowles
- Chemical Research and Development, Pfizer Global Research Division, Pfizer Inc., Eastern Point Road, Groton, Connecticut 06340, U.S.A
| | - Michael J. Castaldi
- Chemical Research and Development, Pfizer Global Research Division, Pfizer Inc., Eastern Point Road, Groton, Connecticut 06340, U.S.A
| | - Ronald Clay
- Chemical Research and Development, Pfizer Global Research Division, Pfizer Inc., Eastern Point Road, Groton, Connecticut 06340, U.S.A
| | - Michel A. Couturier
- Chemical Research and Development, Pfizer Global Research Division, Pfizer Inc., Eastern Point Road, Groton, Connecticut 06340, U.S.A
| | - Gregory Karrick
- Chemical Research and Development, Pfizer Global Research Division, Pfizer Inc., Eastern Point Road, Groton, Connecticut 06340, U.S.A
| | - Teresa W. Makowski
- Chemical Research and Development, Pfizer Global Research Division, Pfizer Inc., Eastern Point Road, Groton, Connecticut 06340, U.S.A
| | - Ruth E. McDermott
- Chemical Research and Development, Pfizer Global Research Division, Pfizer Inc., Eastern Point Road, Groton, Connecticut 06340, U.S.A
| | - Clifford N. Meltz
- Chemical Research and Development, Pfizer Global Research Division, Pfizer Inc., Eastern Point Road, Groton, Connecticut 06340, U.S.A
| | - Morgan Meltz
- Chemical Research and Development, Pfizer Global Research Division, Pfizer Inc., Eastern Point Road, Groton, Connecticut 06340, U.S.A
| | - James E. Phillips
- Chemical Research and Development, Pfizer Global Research Division, Pfizer Inc., Eastern Point Road, Groton, Connecticut 06340, U.S.A
| | - John A. Ragan
- Chemical Research and Development, Pfizer Global Research Division, Pfizer Inc., Eastern Point Road, Groton, Connecticut 06340, U.S.A
| | - David H. Brown Ripin
- Chemical Research and Development, Pfizer Global Research Division, Pfizer Inc., Eastern Point Road, Groton, Connecticut 06340, U.S.A
| | - Robert A. Singer
- Chemical Research and Development, Pfizer Global Research Division, Pfizer Inc., Eastern Point Road, Groton, Connecticut 06340, U.S.A
| | - John L. Tucker
- Chemical Research and Development, Pfizer Global Research Division, Pfizer Inc., Eastern Point Road, Groton, Connecticut 06340, U.S.A
| | - Lulin Wei
- Chemical Research and Development, Pfizer Global Research Division, Pfizer Inc., Eastern Point Road, Groton, Connecticut 06340, U.S.A
| |
Collapse
|
20
|
Carpino PA, Lefker BA, Toler SM, Pan LC, Hadcock JR, Cook ER, DiBrino JN, Campeta AM, DeNinno SL, Chidsey-Frink KL, Hada WA, Inthavongsay J, Mangano FM, Mullins MA, Nickerson DF, Ng O, Pirie CM, Ragan JA, Rose CR, Tess DA, Wright AS, Yu L, Zawistoski MP, DaSilva-Jardine PA, Wilson TC, Thompson DD. Pyrazolinone-piperidine dipeptide growth hormone secretagogues (GHSs). Discovery of capromorelin. Bioorg Med Chem 2003; 11:581-90. [PMID: 12538023 DOI: 10.1016/s0968-0896(02)00433-9] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Novel pyrazolinone-piperidine dipeptide derivatives were synthesized and evaluated as growth hormone secretagogues (GHSs). Two analogues, capromorelin (5, CP-424391-18, hGHS-R1a K(i)=7 nM, rat pituicyte EC(50)=3 nM) and the des-methyl analogue 5c (hGHS-R1a K(i)=17 nM, rat pituicyte EC(50)=3 nM), increased plasma GH levels in an anesthesized rat model, with ED(50) values less than 0.05 mg/kg iv. Capromorelin showed enhanced intestinal absorption in rodent models and exhibited superior pharmacokinetic properties, including high bioavailabilities in two animal species [F(rat)=65%, F(dog)=44%]. This short-duration GHS was orally active in canine models and was selected as a development candidate for the treatment of musculoskeletal frailty in elderly adults.
Collapse
Affiliation(s)
- Philip A Carpino
- Pfizer Global Research and Development, Groton Labs, MS8220-3004, Eastern Point Rd, CT 06340, Groton, USA.
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
21
|
Ragan JA, am Ende DJ, Brenek SJ, Eisenbeis SA, Singer RA, Tickner DL, Teixeira JJ, Vanderplas BC, Weston N. Safe Execution of a Large-Scale Ozonolysis: Preparation of the Bisulfite Adduct of 2-Hydroxyindan-2-carboxaldehyde and Its Utility in a Reductive Amination. Org Process Res Dev 2003. [DOI: 10.1021/op0202235] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- John A. Ragan
- Chemical Research and Development, Pfizer Global Research & Development, Eastern Point Road, Groton, Connecticut 06340, U.S.A
| | - David J. am Ende
- Chemical Research and Development, Pfizer Global Research & Development, Eastern Point Road, Groton, Connecticut 06340, U.S.A
| | - Steven J. Brenek
- Chemical Research and Development, Pfizer Global Research & Development, Eastern Point Road, Groton, Connecticut 06340, U.S.A
| | - Shane A. Eisenbeis
- Chemical Research and Development, Pfizer Global Research & Development, Eastern Point Road, Groton, Connecticut 06340, U.S.A
| | - Robert A. Singer
- Chemical Research and Development, Pfizer Global Research & Development, Eastern Point Road, Groton, Connecticut 06340, U.S.A
| | - Derek L. Tickner
- Chemical Research and Development, Pfizer Global Research & Development, Eastern Point Road, Groton, Connecticut 06340, U.S.A
| | - John J. Teixeira
- Chemical Research and Development, Pfizer Global Research & Development, Eastern Point Road, Groton, Connecticut 06340, U.S.A
| | - Brian C. Vanderplas
- Chemical Research and Development, Pfizer Global Research & Development, Eastern Point Road, Groton, Connecticut 06340, U.S.A
| | - Neil Weston
- Chemical Research and Development, Pfizer Global Research & Development, Eastern Point Road, Groton, Connecticut 06340, U.S.A
| |
Collapse
|
22
|
Carpino PA, Lefker BA, Toler SM, Pan LC, Hadcock JR, Murray MC, Cook ER, DiBrino JN, DeNinno SL, Chidsey-Frink KL, Hada WA, Inthavongsay J, Lewis SK, Mangano FM, Mullins MA, Nickerson DF, Ng O, Pirie CM, Ragan JA, Rose CR, Tess DA, Wright AS, Yu L, Zawistoski MP, Pettersen JC, DaSilva-Jardine PA, Wilson TC, Thompson DD. Discovery and biological characterization of capromorelin analogues with extended half-lives. Bioorg Med Chem Lett 2002; 12:3279-82. [PMID: 12392732 DOI: 10.1016/s0960-894x(02)00734-5] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
New tert-butyl, picolyl and fluorinated analogues of capromorelin (3), a short-acting growth hormone secretagogue (GHS), were prepared as part of a program to identify long-acting GHSs that increase 24-h plasma IGF-1 levels. Compounds 4c and 4d (ACD LogD values >or=2.9) displayed extended plasma elimination half-lives in dogs, primarily due to high volumes of distribution, but showed weak GH secretagogue activities in rats (ED(50)s>10 mg/kg). A less lipophilic derivative 4 (ACD LogD=1.6) exhibited a shorter canine half-life, but stimulated GH secretion in two animal species. Repeat oral dosing of 4 in dogs for 29 days (6 mg/kg) resulted in a significant down-regulation of the post dose GH response and a 60 and 40% increase in IGF-1 levels relative to pre-dose levels at the 8- and 24-h post dose time points. Compound 4 (CP-464709-18) has been selected as a development candidate for the treatment of frailty.
Collapse
Affiliation(s)
- Philip A Carpino
- Pfizer Global Research & Development, Groton Labs, MS8220-3004, Groton, CT 06340, USA.
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
23
|
Ragan JA, Nakatsuka M, Smith DB, Uehling DE, Schreiber SL. Studies of the immunosuppressive agent FK-506: synthesis of an advanced intermediate. J Org Chem 2002. [DOI: 10.1021/jo00279a004] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
24
|
Nakatsuka M, Ragan JA, Sammakia T, Smith DB, Uehling DE, Schreiber SL. Total synthesis of FK506 and an FKBP probe reagent, [C(8),C(9)-13C2]-FK506. J Am Chem Soc 2002. [DOI: 10.1021/ja00170a024] [Citation(s) in RCA: 215] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
25
|
Heathcock CH, Piettre S, Ruggeri RB, Ragan JA, Kath JC. Daphniphyllum alkaloids. 12. A proposed biosynthesis of the pentacylic skeleton. proto-Daphniphylline. J Org Chem 2002. [DOI: 10.1021/jo00035a009] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
26
|
Jones AB, Yamaguchi M, Patten A, Danishefsky SJ, Ragan JA, Smith DB, Schreiber SL. Studies relating to the synthesis of the immunosuppressive agent FK-506: coupling of fragments via a stereoselective trisubstituted olefin forming reaction sequence. J Org Chem 2002. [DOI: 10.1021/jo00262a008] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
27
|
Ragan JA, Jones BP, Meltz CN, Teixeira Jr. JJ. Regioselective Hydroxylation of 2,4-Lutidine: A Practical Synthesis of 4-Hydroxymethyl-2-methylpyridine. SYNTHESIS-STUTTGART 2002. [DOI: 10.1055/s-2002-20960] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
|
28
|
Li B, Kasthurikrishnan N, Ragan JA, Young GR. Structural Determination of a Process Impurity in a Furan−Pyrrole Heteroatom Exchange Reaction. Org Process Res Dev 2001. [DOI: 10.1021/op010227u] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Bryan Li
- Chemical Research and Development, Pfizer Global Research and Development, Groton Laboratories, Eastern Point Road, Groton, Connecticut 06340, U.S.A
| | - Narasimhan Kasthurikrishnan
- Chemical Research and Development, Pfizer Global Research and Development, Groton Laboratories, Eastern Point Road, Groton, Connecticut 06340, U.S.A
| | - John A. Ragan
- Chemical Research and Development, Pfizer Global Research and Development, Groton Laboratories, Eastern Point Road, Groton, Connecticut 06340, U.S.A
| | - Gregory R. Young
- Chemical Research and Development, Pfizer Global Research and Development, Groton Laboratories, Eastern Point Road, Groton, Connecticut 06340, U.S.A
| |
Collapse
|
29
|
Ragan JA, Murry JA, Castaldi MJ, Conrad AK, Jones BP, Li B, Makowski TW, McDermott R, Sitter BJ, White TD, Young GR. 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. Org Process Res Dev 2001. [DOI: 10.1021/op0102159] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- John A. Ragan
- Chemical Research and Development, Pfizer Global Research & Development, Eastern Point Road, Groton, CT 06340, U.S.A
| | - Jerry A. Murry
- Chemical Research and Development, Pfizer Global Research & Development, Eastern Point Road, Groton, CT 06340, U.S.A
| | - Michael J. Castaldi
- Chemical Research and Development, Pfizer Global Research & Development, Eastern Point Road, Groton, CT 06340, U.S.A
| | - Alyson K. Conrad
- Chemical Research and Development, Pfizer Global Research & Development, Eastern Point Road, Groton, CT 06340, U.S.A
| | - Brian P. Jones
- Chemical Research and Development, Pfizer Global Research & Development, Eastern Point Road, Groton, CT 06340, U.S.A
| | - Bryan Li
- Chemical Research and Development, Pfizer Global Research & Development, Eastern Point Road, Groton, CT 06340, U.S.A
| | - Teresa W. Makowski
- Chemical Research and Development, Pfizer Global Research & Development, Eastern Point Road, Groton, CT 06340, U.S.A
| | - Ruth McDermott
- Chemical Research and Development, Pfizer Global Research & Development, Eastern Point Road, Groton, CT 06340, U.S.A
| | - Barb J. Sitter
- Chemical Research and Development, Pfizer Global Research & Development, Eastern Point Road, Groton, CT 06340, U.S.A
| | - Timothy D. White
- Chemical Research and Development, Pfizer Global Research & Development, Eastern Point Road, Groton, CT 06340, U.S.A
| | - Gregory R. Young
- Chemical Research and Development, Pfizer Global Research & Development, Eastern Point Road, Groton, CT 06340, U.S.A
| |
Collapse
|
30
|
Pan LC, Carpino PA, Lefker BA, Ragan JA, Toler SM, Pettersen JC, Nettleton DO, Ng O, Pirie CM, Chidsey-Frink K, Lu B, Nickerson DF, Tess DA, Mullins MA, MacLean DB, DaSilva-Jardine PA, Thompson DD. Preclinical pharmacology of CP-424,391, an orally active pyrazolinone-piperidine [correction of pyrazolidinone-piperidine] growth hormone secretagogue. Endocrine 2001; 14:121-32. [PMID: 11322494 DOI: 10.1385/endo:14:1:121] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Growth hormone secretagogues (GHSs) represent attractive therapeutic alternatives to recombinant growth hormone (GH), given their ability to amplify pulsatile hormone secretion in a relatively physiologic manner. CP-424,391 (391) is a novel, orally active pyrazolinone-piperidine [corrected] GHS. In rat pituitary cell cultures, 391 stimulated GH release with an EC50 = 3 nM. The addition of 391 to rat pituitary cells activated intracellular calcium signaling but did not elevate intracellular cyclic adenosine monophosphate (cAMP). 391 also modulated the effects of GH-releasing hormone and somatostatin on pituitary cell GH-release and intracellular signaling. In nonpituitary cell lines, the ability of 391 to stimulate intracellular signaling was dependent on the expression of recombinant human GHS receptor. Acute administration of 391 to anesthetized rats or to conscious dogs induced pulsatile release of G H in a dose-dependent manner. Plasma insulin-like growth factor-I (IGF-I) was elevated progressively over a 5-d course of daily oral dosing in dogs. Chronic oral administration of 391 augmented body weight gain in rats and dogs. Thus, the peptidomimetic GHS 391 has potential utility for the treatment of clinical conditions that could benefit from systemic augmentation of GH and IGF-I levels.
Collapse
Affiliation(s)
- L C Pan
- Global Research and Development, Pfizer, Inc., Groton, CT 06340, USA [corrected].
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
31
|
Ragan JA, Makowski TW, Castaldi MJ, Hill PD. 2,5-Dimethylpyrrole Protection Facilitates Copper(I)-Mediated Methoxylations of Aryl Iodides in the Presence of Anilines. SYNTHESIS-STUTTGART 1998. [DOI: 10.1055/s-1998-2189] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
|
32
|
Ragan JA, Makowski TW, am Ende DJ, Clifford PJ, Young GR, Conrad AK, Eisenbeis SA. A Practical Synthesis of Cycloheptane-1,3-dione. Org Process Res Dev 1998. [DOI: 10.1021/op9802069] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- John A. Ragan
- Process Research and Development, Pfizer Central Research, Eastern Point Road, Groton, Connecticut 06340
| | - Teresa W. Makowski
- Process Research and Development, Pfizer Central Research, Eastern Point Road, Groton, Connecticut 06340
| | - David J. am Ende
- Process Research and Development, Pfizer Central Research, Eastern Point Road, Groton, Connecticut 06340
| | - Pamela J. Clifford
- Process Research and Development, Pfizer Central Research, Eastern Point Road, Groton, Connecticut 06340
| | - Gregory R. Young
- Process Research and Development, Pfizer Central Research, Eastern Point Road, Groton, Connecticut 06340
| | - Alyson K. Conrad
- Process Research and Development, Pfizer Central Research, Eastern Point Road, Groton, Connecticut 06340
| | - Shane A. Eisenbeis
- Process Research and Development, Pfizer Central Research, Eastern Point Road, Groton, Connecticut 06340
| |
Collapse
|
33
|
|
34
|
Gifford CA, D'Alfonso JN, Ragan JA, Quigley K, Collins T. Lasers and OR nursing: directions for the future. Nurse round table discussion. Todays OR Nurse 1991; 13:16-23. [PMID: 1877074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
|
35
|
Ragan JA. Lasers in gastroenterology. Nurs Clin North Am 1990; 25:685-96. [PMID: 2199941] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The laser nurse is an integral part of the gastroenterologic endoscopy team. A keen awareness of laser instrumentation, delivery systems, endoscopy equipment, gastroenterologic conditions, perioperative endoscopy protocols, and patient monitoring are needed to provide safe and effective laser intervention. The success of gastroenterologic laser use is being realized as new applications begin to replace conventional methods of treatment.
Collapse
|