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Abstract
This review deals with the synthesis of naturally occurring alkaloids containing partially or completely saturated pyrimidine nuclei. The interest in these compounds is associated with their structural diversity, high biological activity and toxicity. The review is divided into four parts, each of which describes a number of synthetic methodologies toward structurally different naturally occurring alkaloids containing saturated cyclic six-membered amidine, guanidine, aminal and urea (thiourea) moieties, respectively. The development of various synthetic strategies for the preparation of these compounds has remarkably increased during the past few decades. This is primarily due to the fact that some of these compounds are isolated only in limited quantities, which makes it practically impossible to study their full structural characteristics and biological activity.
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Bucknell SJ, Ator MA, Brown AJH, Brown J, Cansfield AD, Cansfield JE, Christopher JA, Congreve M, Cseke G, Deflorian F, Jones CR, Mason JS, O'Brien MA, Ott GR, Pickworth M, Southall SM. Structure-Based Drug Discovery of N-(( R)-3-(7-Methyl-1 H-indazol-5-yl)-1-oxo-1-((( S)-1-oxo-3-(piperidin-4-yl)-1-(4-(pyridin-4-yl)piperazin-1-yl)propan-2-yl)amino)propan-2-yl)-2'-oxo-1',2'-dihydrospiro[piperidine-4,4'-pyrido[2,3- d][1,3]oxazine]-1-carboxamide (HTL22562): A Calcitonin Gene-Related Peptide Receptor Antagonist for Acute Treatment of Migraine. J Med Chem 2020; 63:7906-7920. [PMID: 32558564 DOI: 10.1021/acs.jmedchem.0c01003] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Structure-based drug design enabled the discovery of 8, HTL22562, a calcitonin gene-related peptide (CGRP) receptor antagonist. The structure of 8 complexed with the CGRP receptor was determined at a 1.6 Å resolution. Compound 8 is a highly potent, selective, metabolically stable, and soluble compound suitable for a range of administration routes that have the potential to provide rapid systemic exposures with resultant high levels of receptor coverage (e.g., subcutaneous). The low lipophilicity coupled with a low anticipated clinically efficacious plasma exposure for migraine also suggests a reduced potential for hepatotoxicity. These properties have led to 8 being selected as a clinical candidate for acute treatment of migraine.
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Affiliation(s)
- Sarah J Bucknell
- Sosei Heptares, Steinmetz Building, Granta Park, Great Abington, Cambridge CB21 6DG, U.K
| | - Mark A Ator
- Teva Pharmaceuticals, 145 Brandywine Parkway, West Chester, Pennsylvania 19380, United States
| | - Alastair J H Brown
- Sosei Heptares, Steinmetz Building, Granta Park, Great Abington, Cambridge CB21 6DG, U.K
| | - Jason Brown
- Sosei Heptares, Steinmetz Building, Granta Park, Great Abington, Cambridge CB21 6DG, U.K
| | - Andrew D Cansfield
- Sosei Heptares, Steinmetz Building, Granta Park, Great Abington, Cambridge CB21 6DG, U.K
| | - Julie E Cansfield
- Sosei Heptares, Steinmetz Building, Granta Park, Great Abington, Cambridge CB21 6DG, U.K
| | - John A Christopher
- Sosei Heptares, Steinmetz Building, Granta Park, Great Abington, Cambridge CB21 6DG, U.K
| | - Miles Congreve
- Sosei Heptares, Steinmetz Building, Granta Park, Great Abington, Cambridge CB21 6DG, U.K
| | - Gabriella Cseke
- Sosei Heptares, Steinmetz Building, Granta Park, Great Abington, Cambridge CB21 6DG, U.K
| | - Francesca Deflorian
- Sosei Heptares, Steinmetz Building, Granta Park, Great Abington, Cambridge CB21 6DG, U.K
| | - Christopher R Jones
- Sosei Heptares, Steinmetz Building, Granta Park, Great Abington, Cambridge CB21 6DG, U.K
| | - Jonathan S Mason
- Sosei Heptares, Steinmetz Building, Granta Park, Great Abington, Cambridge CB21 6DG, U.K
| | - M Alistair O'Brien
- Sosei Heptares, Steinmetz Building, Granta Park, Great Abington, Cambridge CB21 6DG, U.K
| | - Gregory R Ott
- Teva Pharmaceuticals, 145 Brandywine Parkway, West Chester, Pennsylvania 19380, United States
| | - Mark Pickworth
- Sosei Heptares, Steinmetz Building, Granta Park, Great Abington, Cambridge CB21 6DG, U.K
| | - Stacey M Southall
- Sosei Heptares, Steinmetz Building, Granta Park, Great Abington, Cambridge CB21 6DG, U.K
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Dubowchik GM, Conway CM, Xin AW. Blocking the CGRP Pathway for Acute and Preventive Treatment of Migraine: The Evolution of Success. J Med Chem 2020; 63:6600-6623. [PMID: 32058712 DOI: 10.1021/acs.jmedchem.9b01810] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
The pivotal role of calcitonin gene-related peptide (CGRP) in migraine pathophysiology was identified over 30 years ago, but the successful clinical development of targeted therapies has only recently been realized. This Perspective traces the decades long evolution of medicinal chemistry required to advance small molecule CGRP receptor antagonists, also called gepants, including the current clinical agents rimegepant, vazegepant, ubrogepant, and atogepant. Providing clinically effective blockade of CGRP signaling required surmounting multiple challenging hurdles, including defeating a sizable ligand with subnanomolar affinity for its receptor, designing antagonists with an extended confirmation and multiple pharmacophores while retaining solubility and oral bioavailability, and achieving circulating free plasma levels that provided near maximal CGRP receptor coverage. The clinical efficacy of oral and intranasal gepants and the injectable CGRP monoclonal antibodies (mAbs) are described, as are recent synthetic developments that have benefited from new structural biology data. The first oral gepant was recently approved and heralds a new era in the treatment of migraine.
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Affiliation(s)
- Gene M Dubowchik
- Biohaven Pharmaceuticals Inc., 215 Church Street, New Haven, Connecticut 06510, United States
| | - Charles M Conway
- Biohaven Pharmaceuticals Inc., 215 Church Street, New Haven, Connecticut 06510, United States
| | - Alison W Xin
- Biohaven Pharmaceuticals Inc., 215 Church Street, New Haven, Connecticut 06510, United States
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Habay SA, Miller JM, Bowler MM, Manchak R, Thomas JZ. An efficient synthesis of the piperidinyl dihydroquinazolinone (PDQ) fragment of olcegepant. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2018.08.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Dasgupta B, Kozlowski E, Schroeder DR, Torrente JR, Xu C, Pin S, Conway CM, Dubowchik GM, Macor JE, Vrudhula VM. Serendipitous oxidation product of BIBN4096BS: A potent CGRP receptor antagonist. Bioorg Med Chem Lett 2014; 24:2744-8. [DOI: 10.1016/j.bmcl.2014.04.033] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2014] [Revised: 04/08/2014] [Accepted: 04/09/2014] [Indexed: 10/25/2022]
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Tora G, Degnan AP, Conway CM, Kostich WA, Davis CD, Pin SS, Schartman R, Xu C, Widmann KA, Macor JE, Dubowchik GM. Preparation of imidazoles as potent calcitonin gene-related peptide (CGRP) antagonists. Bioorg Med Chem Lett 2013; 23:5684-8. [PMID: 23993336 DOI: 10.1016/j.bmcl.2013.08.031] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2013] [Revised: 07/26/2013] [Accepted: 08/05/2013] [Indexed: 11/17/2022]
Abstract
Several new potent CGRP receptor antagonists have been prepared in which the amide bond of lead compound 1 has been replaced by bioisosteric imidazole moieties. Substitution at N-1 of the imidazole was optimized to afford compounds with comparable potency to that of lead 1. Conformational restraint of the imidazole to form tetrahydroimidazo[1,5-a]pyrazine 43 gave substantially improved permeability.
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Affiliation(s)
- George Tora
- Medicinal Chemistry, Molecular Sciences and Candidate Optimization, Bristol-Myers Squibb, 311 Pennington-Rocky Hill Road, Pennington, NJ 08534, USA.
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Luo G, Chen L, Civiello R, Pin SS, Xu C, Kostich W, Kelley M, Conway CM, Macor JE, Dubowchik GM. Calcitonin gene-related peptide (CGRP) receptor antagonists: Pyridine as a replacement for a core amide group. Bioorg Med Chem Lett 2012; 22:2917-21. [DOI: 10.1016/j.bmcl.2012.02.065] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2012] [Revised: 02/16/2012] [Accepted: 02/17/2012] [Indexed: 10/28/2022]
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Fischer MJM. Calcitonin gene-related peptide receptor antagonists for migraine. Expert Opin Investig Drugs 2010; 19:815-23. [PMID: 20482328 DOI: 10.1517/13543784.2010.490829] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
IMPORTANCE OF THE FIELD Migraine is a highly prevalent disabling condition, and the current treatment options are not satisfactory. The role of calcitonin gene-related peptide (CGRP) in migraine pathophysiology is well established. CGRP receptor antagonists address this new target and have the potential to improve therapy for both responders and non-responders to previous options. AREAS COVERED IN THIS REVIEW This review describes CGRP, its receptors and their role in the pathophysiology of migraine. CGRP receptor antagonists are a recent development; all reported antagonists are reported in chronological order. The experimental evidence, as well as all clinical trials since the first proof-of-concept study in 2004, is discussed. WHAT THE READER WILL GAIN An overview of the CGRP system and why it provides an attractive drug target for headache. The main focus is on the currently presented CGRP receptor antagonists and clinical evidence for this new therapeutic option. TAKE HOME MESSAGE CGRP receptor antagonists will provide an additional and valuable therapeutic option for the treatment of headaches.
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Paone DV, Staas DD. Calcitonin gene-related peptide receptor antagonists for the treatment of migraine: a patent review. Expert Opin Ther Pat 2010; 19:1675-713. [PMID: 19939188 DOI: 10.1517/13543770903359822] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
BACKGROUND Migraine is a debilitating headache disorder which affects approximately 12% of the general population and is the cause of significant loss of productivity (i.e., lost time from work or school) for those afflicted. The current standard of care, the 5-HT(1B/1D) agonists known as triptans, is contraindicated in patients with cardiovascular disease due to their inherent vasoconstrictive activity; thus, there is a need to develop an alternative therapy for the treatment of the disorder. OBJECTIVE This article reviews patent publications related to the use of small molecule calcitonin gene-related peptide (CGRP) receptor antagonists for the treatment of migraine that have appeared in the literature within the past decade. The commentary is supplemented by information presented in journal articles and focuses on the activity of several major pharmaceutical companies in the field. CONCLUSION Two small molecule CGRP receptor antagonists, olcegepant and telcagepant, have been shown to be clinically efficacious in the treatment of migraine, and thus provide validation of this novel therapeutic mechanism.
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Affiliation(s)
- Daniel V Paone
- Department of Medicinal Chemistry, Merck Research Laboratories, West Point, PA 19486, USA.
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