1
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Shinde AK, Badange RK, Reballi V, Achanta PK, Bojja K, Manchineella S, Rao Muddana N, Subramanian R, Choudary Palacharla R, Benade V, Jayarajan P, Thentu JB, Lingavarapu BB, Yarra S, Kagita N, Rao Doguparthi M, Mohammed AR, Nirogi R. 1-[2-(1-Cyclobutylpiperidin-4-yloxy)-6,7-dihydro-4H-thiazolo[5,4-c]pyridin-5-yl]propan-1-one: a Histamine H 3 Receptor Inverse Agonist with Efficacy in Animal Models of Cognition. ChemMedChem 2021; 17:e202100583. [PMID: 34761873 DOI: 10.1002/cmdc.202100583] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Revised: 11/06/2021] [Indexed: 11/10/2022]
Abstract
A series of chemical optimizations, which was guided by in vitro affinity at histamine H3 receptor (H3 R), modulation of lipophilicity, ADME properties and preclinical efficacy resulted in the identification of 1-[2-(1-cyclobutylpiperidin-4-yloxy)-6,7-dihydro-4H-thiazolo[5,4-c]pyridin-5-yl]propan-1-one (45 e) as a potent and selective (Ki =4.0 nM) H3 R inverse agonist. Dipsogenia induced by (R)-α-methylhistamine was dose dependently antagonized by 45 e, confirming its functional antagonism at H3 R. It is devoid of hERG and phospholipidosis issues. Compound 45 e has adequate oral exposures and favorable half-life in both rats and dogs. It has demonstrated high receptor occupancy (ED80 =0.22 mg/kg) and robust efficacy in object recognition task and, dose dependently increased acetylcholine levels in brain. The sub-therapeutic doses of 45 e in combination with donepezil significantly increased acetylcholine levels. The potent affinity, selectivity, in vivo efficacy and drug like properties together with safety, warrant for further development of this molecule for potential treatment of cognitive disorders associated with Alzheimer's disease.
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Affiliation(s)
- Anil Karbhari Shinde
- Drug Discovery Research, Suven Life Sciences Ltd., Serene Chambers, Road-5, Avenue-7, Banjara Hills, Hyderabad, 500 034, India
| | - Rajesh Kumar Badange
- Drug Discovery Research, Suven Life Sciences Ltd., Serene Chambers, Road-5, Avenue-7, Banjara Hills, Hyderabad, 500 034, India
| | - Veena Reballi
- Drug Discovery Research, Suven Life Sciences Ltd., Serene Chambers, Road-5, Avenue-7, Banjara Hills, Hyderabad, 500 034, India
| | - Pramod Kumar Achanta
- Drug Discovery Research, Suven Life Sciences Ltd., Serene Chambers, Road-5, Avenue-7, Banjara Hills, Hyderabad, 500 034, India
| | - Kumar Bojja
- Drug Discovery Research, Suven Life Sciences Ltd., Serene Chambers, Road-5, Avenue-7, Banjara Hills, Hyderabad, 500 034, India
| | - Sravanthi Manchineella
- Drug Discovery Research, Suven Life Sciences Ltd., Serene Chambers, Road-5, Avenue-7, Banjara Hills, Hyderabad, 500 034, India
| | - Nageswara Rao Muddana
- Drug Discovery Research, Suven Life Sciences Ltd., Serene Chambers, Road-5, Avenue-7, Banjara Hills, Hyderabad, 500 034, India
| | - Ramkumar Subramanian
- Drug Discovery Research, Suven Life Sciences Ltd., Serene Chambers, Road-5, Avenue-7, Banjara Hills, Hyderabad, 500 034, India
| | - Raghava Choudary Palacharla
- Drug Discovery Research, Suven Life Sciences Ltd., Serene Chambers, Road-5, Avenue-7, Banjara Hills, Hyderabad, 500 034, India
| | - Vijay Benade
- Drug Discovery Research, Suven Life Sciences Ltd., Serene Chambers, Road-5, Avenue-7, Banjara Hills, Hyderabad, 500 034, India
| | - Pradeep Jayarajan
- Drug Discovery Research, Suven Life Sciences Ltd., Serene Chambers, Road-5, Avenue-7, Banjara Hills, Hyderabad, 500 034, India
| | - Jagadeesh Babu Thentu
- Drug Discovery Research, Suven Life Sciences Ltd., Serene Chambers, Road-5, Avenue-7, Banjara Hills, Hyderabad, 500 034, India
| | - Bujji Babu Lingavarapu
- Drug Discovery Research, Suven Life Sciences Ltd., Serene Chambers, Road-5, Avenue-7, Banjara Hills, Hyderabad, 500 034, India
| | - Sivasekhar Yarra
- Drug Discovery Research, Suven Life Sciences Ltd., Serene Chambers, Road-5, Avenue-7, Banjara Hills, Hyderabad, 500 034, India
| | - Narendra Kagita
- Drug Discovery Research, Suven Life Sciences Ltd., Serene Chambers, Road-5, Avenue-7, Banjara Hills, Hyderabad, 500 034, India
| | - Mallikarjuna Rao Doguparthi
- Drug Discovery Research, Suven Life Sciences Ltd., Serene Chambers, Road-5, Avenue-7, Banjara Hills, Hyderabad, 500 034, India
| | - Abdul Rasheed Mohammed
- Drug Discovery Research, Suven Life Sciences Ltd., Serene Chambers, Road-5, Avenue-7, Banjara Hills, Hyderabad, 500 034, India
| | - Ramakrishna Nirogi
- Drug Discovery Research, Suven Life Sciences Ltd., Serene Chambers, Road-5, Avenue-7, Banjara Hills, Hyderabad, 500 034, India
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2
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Nirogi R, Shinde A, Tiriveedhi V, Kota L, Saraf SK, Badange RK, Mohammed AR, Subramanian R, Muddana N, Bhyrapuneni G, Abraham R. Benzamide derivatives and their constrained analogs as histamine H 3 receptor antagonists. Eur J Med Chem 2016; 108:655-662. [DOI: 10.1016/j.ejmech.2015.12.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2015] [Revised: 10/26/2015] [Accepted: 12/02/2015] [Indexed: 10/22/2022]
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3
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Hudkins RL, Gruner JA, Raddatz R, Mathiasen JR, Aimone LD, Marino MJ, Bacon ER, Williams M, Ator MA. 3-(1'-Cyclobutylspiro[4H-1,3-benzodioxine-2,4'-piperidine]-6-yl)-5,5-dimethyl-1,4-dihydropyridazin-6-one (CEP-32215), a new wake-promoting histamine H3 antagonist/inverse agonist. Neuropharmacology 2015; 106:37-45. [PMID: 26400408 DOI: 10.1016/j.neuropharm.2015.09.025] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2015] [Revised: 09/09/2015] [Accepted: 09/17/2015] [Indexed: 10/23/2022]
Abstract
CEP-32215 is a new, potent, selective, and orally bioavailable inverse agonist of the histamine H3 receptor (H3R) with drug-like properties. High affinity in human (hH3R Ki = 2.0 ± 0.2 nM) and rat (rH3R Ki = 3.6 ± 0.7 nM) H3R radioligand binding assays was demonstrated. Potent functional antagonism (Kb = 0.3 ± 0.1 nM) and inverse agonism (EC50 = 0.6 ± 0.2 nM) were demonstrated in [(35)S]guanosine 5(')-O-(γ-thio)-triphosphate binding assays. Oral bioavailability and dose-related exposure was consistent among rat, dog, and monkey. After oral dosing, occupancy of H3R by CEP-32215 was estimated by the inhibition of ex vivo binding in rat cortical slices (ED50 = 0.1 mg/kg p.o.). Functional antagonism in brain was demonstrated by the inhibition of R-α-methylhistamine-induced drinking in the rat dipsogenia model (ED50 = 0.92 mg/kg). CEP-32215 significantly increased wake duration in the rat EEG model at 3-30 mg/kg p.o. Increased motor activity, sleep rebound or undesirable events (such as spike wave or seizure activity) was not observed following doses up to 100 mg/kg p.o., indicating an acceptable therapeutic index. CEP-32215 may have potential utility in the treatment of a variety of sleep disorders. This article is part of the Special Issue entitled 'Histamine Receptors'.
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Affiliation(s)
- Robert L Hudkins
- Discovery and Product Development, Teva Branded Pharmaceutical Products R&D, Inc., 145 Brandywine Parkway, West Chester, PA 19380, USA.
| | - John A Gruner
- Discovery and Product Development, Teva Branded Pharmaceutical Products R&D, Inc., 145 Brandywine Parkway, West Chester, PA 19380, USA
| | - Rita Raddatz
- Discovery and Product Development, Teva Branded Pharmaceutical Products R&D, Inc., 145 Brandywine Parkway, West Chester, PA 19380, USA
| | - Joanne R Mathiasen
- Discovery and Product Development, Teva Branded Pharmaceutical Products R&D, Inc., 145 Brandywine Parkway, West Chester, PA 19380, USA
| | - Lisa D Aimone
- Discovery and Product Development, Teva Branded Pharmaceutical Products R&D, Inc., 145 Brandywine Parkway, West Chester, PA 19380, USA
| | - Michael J Marino
- Discovery and Product Development, Teva Branded Pharmaceutical Products R&D, Inc., 145 Brandywine Parkway, West Chester, PA 19380, USA
| | - Edward R Bacon
- Discovery and Product Development, Teva Branded Pharmaceutical Products R&D, Inc., 145 Brandywine Parkway, West Chester, PA 19380, USA
| | - Michael Williams
- Discovery and Product Development, Teva Branded Pharmaceutical Products R&D, Inc., 145 Brandywine Parkway, West Chester, PA 19380, USA
| | - Mark A Ator
- Discovery and Product Development, Teva Branded Pharmaceutical Products R&D, Inc., 145 Brandywine Parkway, West Chester, PA 19380, USA
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4
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Hudkins RL, Becknell NC, Lyons JA, Aimone LD, Olsen M, Haltiwanger RC, Mathiasen JR, Raddatz R, Gruner JA. 3,4-Diaza-bicyclo[4.1.0]hept-4-en-2-one phenoxypropylamine analogs of irdabisant (CEP-26401) as potent histamine-3 receptor inverse agonists with robust wake-promoting activity. Eur J Med Chem 2015; 95:349-56. [DOI: 10.1016/j.ejmech.2015.03.054] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2014] [Revised: 03/21/2015] [Accepted: 03/23/2015] [Indexed: 12/25/2022]
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5
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Nikolic K, Filipic S, Agbaba D, Stark H. Procognitive properties of drugs with single and multitargeting H3 receptor antagonist activities. CNS Neurosci Ther 2014; 20:613-23. [PMID: 24836924 DOI: 10.1111/cns.12279] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2014] [Revised: 04/07/2014] [Accepted: 04/07/2014] [Indexed: 01/01/2023] Open
Abstract
The histamine H3 receptor (H3 R) is an important modulator of numerous central control mechanisms. Novel lead optimizations for H3 R antagonists/inverse agonists involved studies of structure-activity relationships, cross-affinities, and pharmacokinetic properties of promising ligands. Blockade of inhibitory histamine H3 autoreceptors reinforces histaminergic transmission, while antagonism of H3 heteroreceptors accelerates the corticolimbic liberation of acetylcholine, norepinephrine, glutamate, dopamine, serotonin and gamma-aminobutyric acid (GABA). The H3 R positioned at numerous neurotransmission crossroads indicates therapeutic applications of small-molecule H3 R modulators in a number of psychiatric and neurodegenerative diseases with various clinical candidates available. Dual target drugs displaying H3 R antagonism/inverse agonism with inhibition of acetylcholine esterase (AChE), histamine N-methyltransferase (HMT), or serotonin transporter (SERT) are novel class of procognitive agents. Main chemical diversities, pharmacophores, and pharmacological profiles of procognitive agents acting as H3 R antagonists/inverse agonists and dual H3 R antagonists/inverse agonists with inhibiting activity on AChE, HMT, or SERT are highlighted here.
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Affiliation(s)
- Katarina Nikolic
- Faculty of Pharmacy, Department of Pharmaceutical Chemistry, University of Belgrade, Belgrade, Serbia
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6
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Hudkins RL, Josef KA, Becknell NC, Aimone LD, Lyons JA, Mathiasen JR, Gruner JA, Raddatz R. Discovery of (1R,6S)-5-[4-(1-cyclobutyl-piperidin-4-yloxy)-phenyl]-3,4-diaza-bicyclo[4.1.0]hept-4-en-2-one (R,S-4a): histamine H(3) receptor inverse agonist demonstrating potent cognitive enhancing and wake promoting activity. Bioorg Med Chem Lett 2014; 24:1303-6. [PMID: 24513042 DOI: 10.1016/j.bmcl.2014.01.061] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2013] [Revised: 01/16/2014] [Accepted: 01/21/2014] [Indexed: 02/01/2023]
Abstract
A series of fused cyclopropyl-4,5-dihydropyridazin-3-one (3,4-diaza-bicyclo[4.1.0]hept-4-en-2-one) phenoxypiperidine analogs was designed and synthesized, leading to the identification of (1R,6S)-5-[4-(1-cyclobutyl-piperidin-4-yloxy)-phenyl]-3,4-diaza-bicyclo[4.1.0]hept-4-en-2-one (R,S-4a) as a second-generation pyridazin-3-one H3R antagonist. Compound R,S-4a was a potent H3R functional antagonist in vivo in the rat dipsogenia model, demonstrated potent wake activity in the rat EEG/EMG model, and enhanced short-term memory in the rat social recognition memory model at doses as low as 0.03-0.3 mg/kg po.
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Affiliation(s)
- Robert L Hudkins
- Discovery and Product Development, Teva Pharmaceutical Global R&D, 145 Brandywine Parkway, West Chester, PA 19380, USA.
| | - Kurt A Josef
- Discovery and Product Development, Teva Pharmaceutical Global R&D, 145 Brandywine Parkway, West Chester, PA 19380, USA
| | - Nadine C Becknell
- Discovery and Product Development, Teva Pharmaceutical Global R&D, 145 Brandywine Parkway, West Chester, PA 19380, USA
| | - Lisa D Aimone
- Discovery and Product Development, Teva Pharmaceutical Global R&D, 145 Brandywine Parkway, West Chester, PA 19380, USA
| | - Jacquelyn A Lyons
- Discovery and Product Development, Teva Pharmaceutical Global R&D, 145 Brandywine Parkway, West Chester, PA 19380, USA
| | - Joanne R Mathiasen
- Discovery and Product Development, Teva Pharmaceutical Global R&D, 145 Brandywine Parkway, West Chester, PA 19380, USA
| | - John A Gruner
- Discovery and Product Development, Teva Pharmaceutical Global R&D, 145 Brandywine Parkway, West Chester, PA 19380, USA
| | - Rita Raddatz
- Discovery and Product Development, Teva Pharmaceutical Global R&D, 145 Brandywine Parkway, West Chester, PA 19380, USA
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7
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Wilson DM, Apps J, Bailey N, Bamford MJ, Beresford IJ, Briggs MA, Calver AR, Crook B, Davis RP, Davis S, Dean DK, Harris L, Heightman TD, Panchal T, Parr CA, Quashie N, Steadman JG, Schogger J, Sehmi SS, Stean TO, Takle AK, Trail BK, White T, Witherington J, Worby A, Medhurst AD. The discovery of the benzazepine class of histamine H3 receptor antagonists. Bioorg Med Chem Lett 2013; 23:6897-901. [DOI: 10.1016/j.bmcl.2013.09.089] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2013] [Revised: 09/24/2013] [Accepted: 09/27/2013] [Indexed: 11/16/2022]
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8
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Josef KA, Aimone LD, Lyons J, Raddatz R, Hudkins RL. Synthesis of constrained benzocinnolinone analogues of CEP-26401 (irdabisant) as potent, selective histamine H3 receptor inverse agonists. Bioorg Med Chem Lett 2012; 22:4198-202. [DOI: 10.1016/j.bmcl.2012.04.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2011] [Revised: 03/23/2012] [Accepted: 04/02/2012] [Indexed: 10/28/2022]
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9
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Synthesis and evaluation of 4- and 5-pyridazin-3-one phenoxypropylamine analogues as histamine-3 receptor antagonists. Bioorg Med Chem 2012; 20:3880-6. [DOI: 10.1016/j.bmc.2012.04.028] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2011] [Revised: 04/04/2012] [Accepted: 04/10/2012] [Indexed: 12/12/2022]
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10
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Xiao D, Palani A, Sofolarides M, Aslanian R, West RE, Williams SM, Wu RL, Hwa J, Sondey C, Lachowicz J, Korfmacher WA. Fused bicycles as arylketone bioisosteres leading to potent, orally active thiadiazole H3 antagonists. Bioorg Med Chem Lett 2012; 22:3354-7. [DOI: 10.1016/j.bmcl.2012.02.076] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2012] [Revised: 02/18/2012] [Accepted: 02/23/2012] [Indexed: 01/08/2023]
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11
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Zulli AL, Aimone LD, Mathiasen JR, Gruner JA, Raddatz R, Bacon ER, Hudkins RL. Substituted phenoxypropyl-(R)-2-methylpyrrolidine aminomethyl ketones as histamine-3 receptor inverse agonists. Bioorg Med Chem Lett 2012; 22:2807-10. [DOI: 10.1016/j.bmcl.2012.02.081] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2012] [Revised: 02/22/2012] [Accepted: 02/23/2012] [Indexed: 10/28/2022]
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12
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Dandu RR, Lyons JA, Raddatz R, Huang Z, Aimone LD, Hudkins RL. Synthesis and evaluation of a new series of 1′-cyclobutyl-6-(4-piperidyloxy)spiro[benzopyran-2,4′-piperidine] derivatives as high affinity and selective histamine-3 receptor (H3R) antagonists. Bioorg Med Chem Lett 2012; 22:2151-3. [DOI: 10.1016/j.bmcl.2012.01.139] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2011] [Revised: 01/30/2012] [Accepted: 01/31/2012] [Indexed: 11/24/2022]
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13
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Sundar BG, Bailey TR, Dunn D, Hostetler GA, Chatterjee S, Bacon ER, Yue C, Schweizer D, Aimone LD, Gruner JA, Lyons J, Raddatz R, Lesur B. Novel morpholine ketone analogs as potent histamine H3 receptor inverse agonists with wake activity. Bioorg Med Chem Lett 2012; 22:1546-9. [DOI: 10.1016/j.bmcl.2012.01.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2011] [Revised: 01/02/2012] [Accepted: 01/03/2012] [Indexed: 11/28/2022]
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14
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Hudkins RL, Zulli AL, Dandu RR, Tao M, Josef KA, Aimone LD, Haltiwanger RC, Huang Z, Lyons JA, Mathiasen JR, Raddatz R, Gruner JA. 4-phenoxypiperidine pyridazin-3-one histamine H(3) receptor inverse agonists demonstrating potent and robust wake promoting activity. Bioorg Med Chem Lett 2012; 22:1504-9. [PMID: 22290075 DOI: 10.1016/j.bmcl.2012.01.026] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2011] [Revised: 01/04/2012] [Accepted: 01/09/2012] [Indexed: 11/25/2022]
Abstract
Structure-activity relationships for a series of phenoxypiperidine pyridazin-3-one H(3)R antagonists/inverse agonists are disclosed. The search for compounds with improved hERG and DAT selectivity without the formation of in vivo active metabolites identified 6-[4-(1-cyclobutyl-piperidin-4-yloxy)-phenyl]-4,4-dimethyl-4,5-dihydro-2H-pyridazin-3-one 17b. Compound 17b met discovery flow criteria, demonstrated potent H(3)R functional antagonism in vivo in the rat dipsogenia model and potent wake activity in the rat EEG/EMG model at doses as low as 0.1 mg/kg ip.
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Affiliation(s)
- Robert L Hudkins
- Discovery Research, Cephalon, Inc., 145 Brandywine Parkway, West Chester, PA 19380, USA.
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15
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Hudkins RL, Aimone LD, Dandu RR, Dunn D, Gruner JA, Huang Z, Josef KA, Lyons JA, Mathiasen JR, Tao M, Zulli AL, Raddatz R. 4,5-Dihydropyridazin-3-one derivatives as histamine H3 receptor inverse agonists. Bioorg Med Chem Lett 2012; 22:194-8. [DOI: 10.1016/j.bmcl.2011.11.037] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2011] [Revised: 11/08/2011] [Accepted: 11/09/2011] [Indexed: 01/29/2023]
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16
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Andrews JR, Filer CN, Maniscalco M, Becknell NC, Hudkins RL. High specific activity tritiation of the pyridazin-3-one histamine H3 receptor inverse agonist CEP-27088. Appl Radiat Isot 2011; 70:512-4. [PMID: 22177523 DOI: 10.1016/j.apradiso.2011.11.061] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2011] [Revised: 11/24/2011] [Accepted: 11/29/2011] [Indexed: 11/24/2022]
Abstract
Methods are presented to tritiate and characterize radioligand (3).
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17
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Tao M, Aimone LD, Gruner JA, Mathiasen JR, Huang Z, Lyons J, Raddatz R, Hudkins RL. Synthesis and structure-activity relationship of 5-pyridazin-3-one phenoxypiperidines as potent, selective histamine H(3) receptor inverse agonists. Bioorg Med Chem Lett 2011; 22:1073-7. [PMID: 22197136 DOI: 10.1016/j.bmcl.2011.11.118] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2011] [Revised: 11/22/2011] [Accepted: 11/28/2011] [Indexed: 10/14/2022]
Abstract
Optimization of the R(2) and R(6) positions of (5-{4-[3-(R)-2-methylpyrrolin-1-yl-propoxy]phenyl}-2H-pyridazin-3-one) 2a with constrained phenoxypiperidines led to the identification of 5-[4-(cyclobutyl-piperidin-4-yloxy)-phenyl]-6-methyl-2H-pyridazin-3-one 8b as a potent, selective histamine H(3) receptor antagonist with favorable pharmacokinetic properties. Compound 8b had an excellent safety genotoxocity profile for a CNS-active compound in the Ames and micronucleus tests, also displayed potent H(3)R antagonist activity in the brain in the rat dipsogenia model and robust wake activity in the rat EEG/EMG model.
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Affiliation(s)
- Ming Tao
- Discovery Research, Cephalon, Inc., 145 Brandywine Parkway, West Chester, PA 19380, USA.
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18
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Synthesis and evaluation of pyridone-phenoxypropyl-R-2-methylpyrrolidine analogues as histamine H3 receptor antagonists. Bioorg Med Chem Lett 2011; 21:7076-80. [DOI: 10.1016/j.bmcl.2011.09.091] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2011] [Revised: 09/19/2011] [Accepted: 09/21/2011] [Indexed: 11/18/2022]
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19
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Becknell NC, Dandu RR, Lyons JA, Aimone LD, Raddatz R, Hudkins RL. Synthesis and evaluation of 4-alkoxy-[1'-cyclobutyl-spiro(3,4-dihydrobenzopyran-2,4'-piperidine)] analogues as histamine-3 receptor antagonists. Bioorg Med Chem Lett 2011; 22:186-9. [PMID: 22153342 DOI: 10.1016/j.bmcl.2011.11.038] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2011] [Revised: 11/08/2011] [Accepted: 11/09/2011] [Indexed: 12/31/2022]
Abstract
A novel class of 4-alkoxy-[1'-cyclobutyl-spiro(3,4-dihydrobenzopyran-2,4'-piperidine)] analogues were designed and synthesized as H(3)R antagonists. Structure-activity relationship identified sulfone 27 with excellent H(3)R affinities in both humans and rats, and acceptable pharmacokinetic properties. Further, compound 28 achieved single digit nanomolar H(3)R affinities in both species with minimum hERG activity.
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Affiliation(s)
- Nadine C Becknell
- Discovery Research, Cephalon, Inc., 145 Brandywine Parkway, West Chester, PA 19380, USA.
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20
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Synthesis and evaluation of pyridazinone–phenethylamine derivatives as selective and orally bioavailable histamine H3 receptor antagonists with robust wake-promoting activity. Bioorg Med Chem Lett 2011; 21:6362-5. [DOI: 10.1016/j.bmcl.2011.08.104] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2011] [Revised: 08/19/2011] [Accepted: 08/25/2011] [Indexed: 11/19/2022]
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21
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Tao M, Raddatz R, Aimone LD, Hudkins RL. Synthesis and structure–activity relationships of 4,5-fused pyridazinones as histamine H3 receptor antagonists. Bioorg Med Chem Lett 2011; 21:6126-30. [PMID: 21906941 DOI: 10.1016/j.bmcl.2011.08.045] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2011] [Revised: 08/02/2011] [Accepted: 08/04/2011] [Indexed: 12/19/2022]
Affiliation(s)
- Ming Tao
- Discovery Research, Cephalon, Inc., 145 Brandywine Parkway, West Chester, PA 19380, USA.
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22
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Hudkins RL, Aimone LD, Bailey TR, Bendesky RJ, Dandu RR, Dunn D, Gruner JA, Josef KA, Lin YG, Lyons J, Marcy VR, Mathiasen JR, Sundar BG, Tao M, Zulli AL, Raddatz R, Bacon ER. Identification of pyridazin-3-one derivatives as potent, selective histamine H3 receptor inverse agonists with robust wake activity. Bioorg Med Chem Lett 2011; 21:5493-7. [DOI: 10.1016/j.bmcl.2011.06.108] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2011] [Revised: 06/23/2011] [Accepted: 06/24/2011] [Indexed: 11/25/2022]
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Sundar BG, Bailey T, Bacon E, Aimone L, Huang Z, Lyons J, Raddatz R, Hudkins R. Amine-constrained pyridazinone histamine H3 receptor antagonists. Bioorg Med Chem Lett 2011; 21:5543-6. [DOI: 10.1016/j.bmcl.2011.06.094] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2011] [Revised: 06/17/2011] [Accepted: 06/20/2011] [Indexed: 12/21/2022]
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Xiao D, Palani A, Sofolarides M, Huang Y, Aslanian R, Vaccaro H, Hong L, McKittrick B, West RE, Williams SM, Wu RL, Hwa J, Sondey C, Lachowicz J. Discovery of a series of potent arylthiadiazole H3 antagonists. Bioorg Med Chem Lett 2011; 21:861-4. [DOI: 10.1016/j.bmcl.2010.11.065] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2010] [Revised: 11/07/2010] [Accepted: 11/16/2010] [Indexed: 10/18/2022]
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Łażewska D, Kieć-Kononowicz K. Recent advances in histamine H3receptor antagonists/inverse agonists. Expert Opin Ther Pat 2010; 20:1147-69. [DOI: 10.1517/13543776.2010.509346] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Le S, Finn JP, Larijani ME, Marino MJ, Schaffhauser H. Detection of low level histamine H3 receptor occupancy by autoradiography. J Neurosci Methods 2009; 185:70-5. [DOI: 10.1016/j.jneumeth.2009.09.015] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2009] [Revised: 09/03/2009] [Accepted: 09/08/2009] [Indexed: 10/20/2022]
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Kennedy JP, Conn PJ, Lindsley CW. A novel class of H3 antagonists derived from the natural product guided synthesis of unnatural analogs of the marine bromopyrrole alkaloid dispyrin. Bioorg Med Chem Lett 2009; 19:3204-8. [PMID: 19443215 DOI: 10.1016/j.bmcl.2009.04.106] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2009] [Revised: 04/22/2009] [Accepted: 04/23/2009] [Indexed: 11/19/2022]
Abstract
This Letter describes the natural product guided synthesis of unnatural analogs of the marine bromopyrrole alkaloid dispyrin, and the resulting SAR of H(3) antagonism. Multiple rounds of iterative parallel synthesis improved human H(3) IC(50) approximately 33-fold, and afforded a new class of H(3) antagonists based on the novel bromotyramine core of dispyrin.
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Affiliation(s)
- J Phillip Kennedy
- Department of Chemistry, Vanderbilt University, Nashville, TN 37232, USA
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Morini G, Comini M, Rivara M, Rivara S, Bordi F, Plazzi PV, Flammini L, Saccani F, Bertoni S, Ballabeni V, Barocelli E, Mor M. Synthesis and structure–activity relationships for biphenyl H3 receptor antagonists with moderate anti-cholinesterase activity. Bioorg Med Chem 2008; 16:9911-24. [DOI: 10.1016/j.bmc.2008.10.029] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2008] [Revised: 10/02/2008] [Accepted: 10/12/2008] [Indexed: 12/01/2022]
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