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Su G, Thomson CJ, Yamazaki K, Rozsar D, Christensen KE, Hamlin TA, Dixon DJ. A bifunctional iminophosphorane squaramide catalyzed enantioselective synthesis of hydroquinazolines via intramolecular aza-Michael reaction to α,β-unsaturated esters. Chem Sci 2021; 12:6064-6072. [PMID: 33996002 PMCID: PMC8098679 DOI: 10.1039/d1sc00856k] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
An efficient synthesis of enantioenriched hydroquinazoline cores via a novel bifunctional iminophosphorane squaramide catalyzed intramolecular aza-Michael reaction of urea-linked α,β-unsaturated esters is described. The methodology exhibits a high degree of functional group tolerance around the forming hydroquinazoline aryl core and wide structural variance on the nucleophilic N atom of the urea moiety. Excellent yields (up to 99%) and high enantioselectivities (up to 97 : 3 er) using both aromatic and less acidic aliphatic ureas were realized. The potential industrial applicability of the transformation was demonstrated in a 20 mmol scale-up experiment using an adjusted catalyst loading of 2 mol%. The origin of enantioselectivity and reactivity enhancement provided by the squaramide motif has been uncovered computationally using density functional theory (DFT) calculations, combined with the activation strain model (ASM) and energy decomposition analysis (EDA). The activation of both aromatic and aliphatic ureas as N-centered nucleophiles in intramolecular Michael addition reactions to α,β-unsaturated esters was achieved under bifunctional iminophosphorane squaramide superbase catalysis.![]()
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Affiliation(s)
- Guanglong Su
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford Mansfield Road Oxford OX1 3TA UK
| | - Connor J Thomson
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford Mansfield Road Oxford OX1 3TA UK
| | - Ken Yamazaki
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford Mansfield Road Oxford OX1 3TA UK .,Department of Theoretical Chemistry, Amsterdam Institute of Molecular and Life Sciences (AIMMS), Amsterdam Center for Multiscale Modeling (ACMM), Vrije Universiteit Amsterdam De Boelelaan 1083, 1081 HV Amsterdam The Netherlands
| | - Daniel Rozsar
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford Mansfield Road Oxford OX1 3TA UK
| | - Kirsten E Christensen
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford Mansfield Road Oxford OX1 3TA UK
| | - Trevor A Hamlin
- Department of Theoretical Chemistry, Amsterdam Institute of Molecular and Life Sciences (AIMMS), Amsterdam Center for Multiscale Modeling (ACMM), Vrije Universiteit Amsterdam De Boelelaan 1083, 1081 HV Amsterdam The Netherlands
| | - Darren J Dixon
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford Mansfield Road Oxford OX1 3TA UK
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2
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Gruber N, Díaz JE, Orelli LR. Synthesis of dihydroquinazolines from 2-aminobenzylamine: N 3 -aryl derivatives with electron-withdrawing groups. Beilstein J Org Chem 2018; 14:2510-2519. [PMID: 30344774 PMCID: PMC6178284 DOI: 10.3762/bjoc.14.227] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2018] [Accepted: 08/31/2018] [Indexed: 11/23/2022] Open
Abstract
The sequential N-functionalization of 2-aminobenzylamine (2-ABA) followed by cyclodehydration allowed for a straightforward and efficient synthesis of 3,4-dihydroquinazolines with N-aryl substituents bearing electron-withdrawing groups. The sequence involves an initial SNAr displacement, N-acylation and MW-assisted ring closure. Remarkably, the uncatalyzed N-arylation of 2-ABA led to the monosubstitution product using equimolar amounts of both reagents. The individual steps were optimized achieving good to excellent overall yields of the desired heterocycles, avoiding additional protection and deprotection steps. A mechanistic interpretation for the cyclodehydration reaction promoted by trimethylsilyl polyphosphate (PPSE) is also proposed on the basis of literature data and our experimental observations.
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Affiliation(s)
- Nadia Gruber
- Universidad de Buenos Aires, CONICET, Departamento de Química Orgánica, Facultad de Farmacia y Bioquímica, Junín 956, (1113) Buenos Aires, Argentina
| | - Jimena E Díaz
- Universidad de Buenos Aires, CONICET, Departamento de Química Orgánica, Facultad de Farmacia y Bioquímica, Junín 956, (1113) Buenos Aires, Argentina
| | - Liliana R Orelli
- Universidad de Buenos Aires, CONICET, Departamento de Química Orgánica, Facultad de Farmacia y Bioquímica, Junín 956, (1113) Buenos Aires, Argentina
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3
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Chen Q, Mao Z, Gao K, Guo F, Sheng L, Chen Z. Synthesis of 1,2-Dihydroquinazolines via Rearrangement of Indazolium Salts. J Org Chem 2018; 83:8750-8758. [PMID: 30011991 DOI: 10.1021/acs.joc.8b01044] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A convenient synthesis of 1,2-dihydroquinazolines via rearrangement of indazolium salts was described. A mechanistic study using isotope labeling experiment revealed that the rearrangement passes through cleavage of N-N bond/ring opening after basic deprotonation of 2-benzyl in indazolium salts to yield intermediate E, which proceeds in an intramolecular N-nucleophilic addition to form the observed product. Computational analyses imply that the pathway of the rearrangement is determined by the energy barriers of the ring-closing process and the stability of the product.
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Affiliation(s)
- Qian Chen
- School of Chemical Engineering , Southwest Forestry University , Kunming 650224 , China.,School of Chemistry and Chemical Engineering , Harbin Institute of Technology , Harbin 150080 , China
| | - Zhuqing Mao
- School of Chemistry and Chemical Engineering , Harbin Institute of Technology , Harbin 150080 , China
| | - Kunqi Gao
- School of Chemistry and Chemical Engineering , Harbin Institute of Technology , Harbin 150080 , China
| | - Fang Guo
- School of Chemistry and Chemical Engineering , Harbin Institute of Technology , Harbin 150080 , China
| | - Li Sheng
- School of Chemistry and Chemical Engineering , Harbin Institute of Technology , Harbin 150080 , China
| | - Zhonglin Chen
- State Key Laboratory of Urban Water Resource and Environment, School of Environment , Harbin Institute of Technology , Harbin 150090 , China
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Tajfirooz F, Davoodnia A, Pordel M, Ebrahimi M, Beyramabadi SA. Synthesis of some new heterocycles containing quinazoline moiety. RUSS J GEN CHEM+ 2017. [DOI: 10.1134/s1070363217100255] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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5
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In silico identification of T-type calcium channel blockers: A ligand-based pharmacophore mapping approach. J Adv Res 2016; 7:931-944. [PMID: 27713840 PMCID: PMC5045570 DOI: 10.1016/j.jare.2016.09.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2016] [Revised: 09/07/2016] [Accepted: 09/08/2016] [Indexed: 12/04/2022] Open
Abstract
Limited progress has been made in the quest to identify both selective and non-toxic T-type calcium channel blocking compounds. The present research work was directed toward slaking the same by identifying the selective three dimensional (3D) pharmacophore map for T-type calcium channel blockers (CCBs). Using HipHop module in the CATALYST 4.10 software, both selective and non-selective HipHop pharmacophore maps for T-type CCBs were developed to identify its important common pharmacophoric features. HipHop pharmacophore map of the selective T-type CCBs contained six different chemical features, namely ring aromatic (R), positive ionizable (P), two hydrophobic aromatic (Y), hydrophobic aliphatic (Z), hydrogen bond acceptor (H) and hydrogen bond donor (D). However, non-selective T-type CCBs contain all the above mentioned features except ring aromatic (R). The present ligand-based pharmacophore mapping approach could thus be utilized in classifying selective vs. non-selective T-type CCBs. Further, the model can be used for virtual screening of several small molecule databases.
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6
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Pharmacological targeting of ion channels for cancer therapy: In vivo evidences. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2016; 1863:1385-97. [DOI: 10.1016/j.bbamcr.2015.11.032] [Citation(s) in RCA: 70] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2015] [Revised: 11/25/2015] [Accepted: 11/26/2015] [Indexed: 12/29/2022]
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8
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Kita Y, Higashida K, Yamaji K, Iimuro A, Mashima K. Asymmetric hydrogenation of quinazolinium salts catalysed by halide-bridged dinuclear iridium complexes bearing chiral diphosphine ligands. Chem Commun (Camb) 2015; 51:4380-2. [DOI: 10.1039/c5cc00258c] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Asymmetric hydrogenation of 4-substituted quinazolinium salts catalyzed by dinuclear Ir complexes is described.
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Affiliation(s)
- Yusuke Kita
- Department of Materials Engineering
- Graduate School of Engineering Science
- Osaka University
- Toyonaka
- Japan
| | - Kosuke Higashida
- Department of Materials Engineering
- Graduate School of Engineering Science
- Osaka University
- Toyonaka
- Japan
| | - Kenta Yamaji
- Department of Materials Engineering
- Graduate School of Engineering Science
- Osaka University
- Toyonaka
- Japan
| | - Atsuhiro Iimuro
- Department of Materials Engineering
- Graduate School of Engineering Science
- Osaka University
- Toyonaka
- Japan
| | - Kazushi Mashima
- Department of Materials Engineering
- Graduate School of Engineering Science
- Osaka University
- Toyonaka
- Japan
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9
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Wang J, Zong Y, Fu R, Niu Y, Yue G, Quan Z, Wang X, Pan Y. Poly(4-vinylpyridine) supported acidic ionic liquid: a novel solid catalyst for the efficient synthesis of 2,3-dihydroquinazolin-4(1H)-ones under ultrasonic irradiation. ULTRASONICS SONOCHEMISTRY 2014; 21:29-34. [PMID: 23751459 DOI: 10.1016/j.ultsonch.2013.05.009] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2013] [Revised: 05/07/2013] [Accepted: 05/17/2013] [Indexed: 06/02/2023]
Abstract
A novel poly(4-vinylpyridine) supported acidic ionic liquid catalyst was synthesized by the reaction of 4-vinylpyridine with 1,3-propanesultone, followed by the polymerization and the addition of the heteropolyacid. Due to the combination of polymer features and ionic liquid, it acted as a heterogeneous catalyst to effectively catalyze the cyclocondensation reaction of anthranilamide with aldehydes under ultrasonic irradiation and afforded the corresponding 2,3-dihydro-4(1H)-quinazolinones compounds in good to excellent yields. In addition, the catalyst could be easily recovered by the filtration and reused six times without significant loss of catalytic activity. More importantly, the use of ultrasonic irradiation can obviously accelerate the reaction.
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Affiliation(s)
- Junke Wang
- Key Laboratory of Hexi Corridor Resources Utilization of Gansu Universities, College of Chemistry and Chemical Engineering, Hexi University, Zhangye 734000, China; School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China.
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10
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Park JE, Ji WK, Jang JW, Pae AN, Choi K, Choi KH, Kang J, Roh EJ. Synthesis and biological evaluation of 1-(2-hydroxy-3-phenyloxypropyl)piperazine derivatives as T-type calcium channel blockers. Bioorg Med Chem Lett 2013; 23:1887-90. [DOI: 10.1016/j.bmcl.2012.12.072] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2012] [Revised: 12/10/2012] [Accepted: 12/21/2012] [Indexed: 10/27/2022]
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11
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Rim HK, Lee HW, Choi IS, Park JY, Choi HW, Choi JH, Cho YW, Lee JY, Lee KT. T-type Ca2+ channel blocker, KYS05047 induces G1 phase cell cycle arrest by decreasing intracellular Ca2+ levels in human lung adenocarcinoma A549 cells. Bioorg Med Chem Lett 2012; 22:7123-6. [PMID: 23079520 DOI: 10.1016/j.bmcl.2012.09.076] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2012] [Revised: 09/04/2012] [Accepted: 09/21/2012] [Indexed: 01/15/2023]
Abstract
In a previous study, we found that the 3,4-dihydroquinazoline derivative, 4-(Benzylcarbamoylmethyl)-2-(biphenyl-4-ylamino)-3-(5-tert-butyloxycarbamoyl-1-pentyl)-3,4-dihydroquinazoline (KYS05047), was a selective T-type Ca(2+) channel blocker with anti-proliferative effects against various cancer cells. However, the mechanism responsible for its effects has not been studied. In this study, we investigated the effect of KYS05047 on cell cycle arrest and the mechanisms involved in human lung adenocarcinoma A549 cells. Among the G(1) phase cell cycle-related proteins examined, the levels of cyclin-dependent protein kinase (Cdk2) and Cdk4 were reduced by KYS05047 (7 μM), whereas the steady-state levels of cyclin D1 and E were unaffected. In addition, KYS05047 increased the protein level of p27(KIP1) and suppressed the kinase activities of Cdk2 and Cdk4. In addition, pretreatment with KCl, which increases intracellular Ca(2+) levels, prevented KYS05047-induced intracellular Ca(2+) decreases and cell cycle arrest. Furthermore, the administration of KYS05047 (2 or 10 mg/kg, po) for 21 days was also found to significantly inhibit tumor growth in an A549 xenograft nude mice model. In conclusion, our results suggested that KYS05047 induced G(1) phase cell cycle arrest in A549 cells associated with a decrease in intracellular Ca(2+) concentrations and inhibited the in vivo tumor growth of A549 xenograft mice.
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Affiliation(s)
- Hong-Kun Rim
- Department of Pharmaceutical Biochemistry, Kyung Hee University, 1 Hoegi-dong, Dongdaemun-gu, Seoul 130-701, Republic of Korea
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12
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Watanuki S, Matsuura K, Tomura Y, Okada M, Okazaki T, Ohta M, Tsukamoto SI. Synthesis and pharmacological evaluation of 1-alkyl-N-[(1R)-1-(4-fluorophenyl)-2-methylpropyl]piperidine-4-carboxamide derivatives as novel antihypertensive agents. Chem Pharm Bull (Tokyo) 2012; 59:1376-85. [PMID: 22041074 DOI: 10.1248/cpb.59.1376] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
We synthesized and evaluated inhibitory activity against T-type Ca(2+) channels for a series of 1-alkyl-N-[(1R)-1-(4-fluorophenyl)-2-methylpropyl]piperidine-4-carboxamide derivatives. Structure-activity relationship studies have revealed that the isopropyl substituent at the benzylic position plays an important role in exerting potent inhibitory activity, and the absolute configuration of the benzylic position was found to be opposite that of mibefradil, which was first launched as a new class of T-type Ca(2+) channel blocker. Oral administration of N-[(1R)-1-(4-fluorophenyl)-2-methylpropyl]-1-[2-(3-methoxyphenyl)ethyl]piperidine-4-carboxamide (17f) lowered blood pressure in spontaneously hypertensive rats without inducing reflex tachycardia, an adverse effect often caused by traditional L-type Ca(2+) channel blockers.
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Affiliation(s)
- Susumu Watanuki
- Drug Discovery Research, Astellas Pharma Inc., Tsukuba, Ibaraki 305–8585, Japan.
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13
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Watanuki S, Matsuura K, Tomura Y, Okada M, Okazaki T, Ohta M, Tsukamoto SI. Synthesis and Pharmacological Evaluation of 2-(1-Alkylpiperidin-4-yl)-N-[(1R)-1-(4-fluorophenyl)-2-methylpropyl]acetamide Derivatives as Novel Antihypertensive Agents. Chem Pharm Bull (Tokyo) 2012; 60:223-34. [DOI: 10.1248/cpb.60.223] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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14
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Ionic liquid-supported synthesis of dihydroquinazolines and tetrahydroquinazolines under microwave irradiation. Mol Divers 2011; 16:241-9. [DOI: 10.1007/s11030-011-9350-1] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2011] [Accepted: 12/03/2011] [Indexed: 11/26/2022]
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15
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Synthesis and pharmacological evaluation of 1-alkyl-N-[2-ethyl-2-(4-fluorophenyl)butyl]piperidine-4-carboxamide derivatives as novel antihypertensive agents. Bioorg Med Chem 2011; 19:5628-38. [DOI: 10.1016/j.bmc.2011.07.030] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2011] [Revised: 07/15/2011] [Accepted: 07/16/2011] [Indexed: 11/18/2022]
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16
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Ullapu PR, Ku SJ, Choi YH, Park JY, Han SY, Baek DJ, Lee JK, Pae AN, Min SJ, Cho YS. Synthesis and Biological Evaluation of 1-Heteroarylmethyl 1,4-Diazepanes Derivatives as Potential T-type Calcium Channel Blockers. B KOREAN CHEM SOC 2011. [DOI: 10.5012/bkcs.2011.32.8.3063] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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17
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Watanuki S, Matsuura K, Tomura Y, Okada M, Okazaki T, Ohta M, Tsukamoto SI. Synthesis and Pharmacological Evaluation of 1-Isopropyl-1,2,3,4-tetrahydroisoquinoline Derivatives as Novel Antihypertensive Agents. Chem Pharm Bull (Tokyo) 2011; 59:1029-37. [DOI: 10.1248/cpb.59.1029] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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18
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Giordanetto F, Knerr L, Wållberg A. T-type calcium channels inhibitors: a patent review. Expert Opin Ther Pat 2010; 21:85-101. [PMID: 21087200 DOI: 10.1517/13543776.2011.536532] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
IMPORTANCE OF THE FIELD T-type calcium channels are transmembrane proteins that regulate calcium entry in the cell in a voltage-dependent manner. Intracellular calcium levels are the key to many physiological processes, ranging from neuron firing to cardiac pacemaking. Inhibition of T-type calcium channels is heralded as a potential treatment to peripheral and CNS disorders, including hypertension, heart failure, sleep, epilepsy, drug addiction and neuropathic pain. AREAS COVERED IN THIS REVIEW A comprehensive summary of patent literature disclosing T-type calcium channels inhibitors is provided. WHAT THE READER WILL GAIN In all, 46 patent applications including 15 chemical structure classes are reviewed. Available in vitro, in vivo and clinical results are also discussed. TAKE HOME MESSAGE Several selective T-type calcium channels inhibitors with demonstrated in vitro and in vivo effects, including one Phase I clinical candidate, are now available. While future clinical results will be paramount to assess target validity in patients, these novel inhibitors represent excellent tools to further investigate the role of T-type channels in pathophysiological conditions.
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19
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Design, syntheses, and SAR of 2,8-diazaspiro[4.5]decanones as T-type calcium channel antagonists. Bioorg Med Chem Lett 2010; 20:6375-8. [DOI: 10.1016/j.bmcl.2010.09.098] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2010] [Revised: 09/14/2010] [Accepted: 09/16/2010] [Indexed: 11/17/2022]
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20
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Lee JE, Koh HY, Seo SH, Baek YY, Rhim H, Cho YS, Choo H, Pae AN. Synthesis and biological evaluation of oxazole derivatives as T-type calcium channel blockers. Bioorg Med Chem Lett 2010; 20:4219-22. [DOI: 10.1016/j.bmcl.2010.05.030] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2010] [Revised: 05/11/2010] [Accepted: 05/12/2010] [Indexed: 10/19/2022]
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21
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Choe YJ, Seo HN, Jung SY, Rhim H, Kim J, Choo DJ, Lee JY. Synthesis and SAR study of T-type calcium channel blockers. Part II. Arch Pharm (Weinheim) 2008; 341:661-4. [PMID: 18816587 DOI: 10.1002/ardp.200800079] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
3,4-Dihydroquinazoline derivatives have been known to be the novel and potent T-type calcium channel blockers. From a systematic variation of 3,4-dihydroquinazoline derivative 5c (KYS05043), plausible SAR results were established. It was revealed that a 5-(dimethylamino)pentylamino group at R(1), a biphenyl group at R(2), and a benzyl amido group at R(3)in the 3,4-dihydroquinazoline backbone are closely related with the channel selectivity (T/N-type) as well as the potency based on the discovery of 6k (KYS05090).
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Affiliation(s)
- Yun Jeong Choe
- Research Institute for Basic Sciences and Department of Chemistry, College of Sciences, Kyung Hee University, Seoul, Korea
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22
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Synthesis and Biological Evaluation of Isophthalamide Derivatives as T-type Calcium Channel Blockers. B KOREAN CHEM SOC 2008. [DOI: 10.5012/bkcs.2008.29.10.1881] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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23
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Heo JH, Seo HN, Choe YJ, Kim S, Oh CR, Kim YD, Rhim H, Choo DJ, Kim J, Lee JY. T-type Ca2+ channel blockers suppress the growth of human cancer cells. Bioorg Med Chem Lett 2008; 18:3899-901. [PMID: 18585035 DOI: 10.1016/j.bmcl.2008.06.034] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2008] [Revised: 06/06/2008] [Accepted: 06/11/2008] [Indexed: 10/21/2022]
Abstract
In order to further clarify the role of T-type Ca(2+) channels in cell proliferation, we have measured the growth inhibition of human cancer cells by using our potent T-type Ca(2+) channel blockers. As a result, KYS05090, a most potent T-type Ca(2+) channel blocker, was found to be as potent as doxorubicin against some human cancer cells without acute toxicity. Therefore, this letter provides the biological results that T-type calcium channel is important in regulating the important cellular phenotype transition leading to cell proliferation, and thus novel T-type Ca(2+) channel blocker presents new prospects for cancer treatment.
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Affiliation(s)
- Jae Ho Heo
- Research Institute for Basic Sciences and Department of Chemistry, College of Sciences, Kyung Hee University, 1 Hoegi-Dong, Dongdaemun-Gu, Seoul 130-701, Republic of Korea
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Seo HN, Choi JY, Choe YJ, Kim Y, Rhim H, Lee SH, Kim J, Joo DJ, Lee JY. Discovery of potent T-type calcium channel blocker. Bioorg Med Chem Lett 2007; 17:5740-3. [PMID: 17869104 DOI: 10.1016/j.bmcl.2007.08.070] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2007] [Revised: 08/16/2007] [Accepted: 08/29/2007] [Indexed: 11/26/2022]
Abstract
The intensive SAR study of 3,4-dihydroquinazoline series led to the most potent compound 10 (KYS05090: IC(50)=41+/-1 nM) against T-type calcium channel and its potency is nearly comparable to that of Kurtoxin. As a small organic molecule, this compound showed the highest blocking activity reported to date.
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Affiliation(s)
- Han Na Seo
- Research Institute for Basic Sciences and Department of Chemistry, Kyung Hee University, Seoul 130-701, Republic of Korea
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26
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Choi JY, Seo HN, Lee MJ, Park SJ, Park SJ, Jeon JY, Kang JH, Pae AN, Rhim H, Lee JY. Synthesis and biological evaluation of novel T-type calcium channel blockers. Bioorg Med Chem Lett 2007; 17:471-5. [PMID: 17064894 DOI: 10.1016/j.bmcl.2006.10.024] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2006] [Revised: 09/25/2006] [Accepted: 10/10/2006] [Indexed: 10/24/2022]
Abstract
3,4-Dihydroquinazoline analogues substituted by N-methyl-N-(5-pyrrolidinopentyl)amine at the 2-position were synthesized and their blocking effects were evaluated for T- and N-type calcium channels. Compound 11b (KYS05080), compared to mibefradil (IC50=1.34+/-0.49 microM), was about 5-fold potent (IC50=0.26+/-0.01 microM) for T-type calcium channel (alpha1G) blocking and its selectivity of T/N-type was also improved (7.5 versus 1.4 of mibefradil).
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Affiliation(s)
- Ja Youn Choi
- Research Institute for Basic Sciences and Department of Chemistry, College of Sciences, Kyung Hee University, 1 Hoegi-Dong, Seoul 130-701, Republic of Korea
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27
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Kim HS, Kim Y, Doddareddy MR, Seo SH, Rhim H, Tae J, Pae AN, Choo H, Cho YS. Design, synthesis, and biological evaluation of 1,3-dioxoisoindoline-5-carboxamide derivatives as T-type calcium channel blockers. Bioorg Med Chem Lett 2006; 17:476-81. [PMID: 17092715 DOI: 10.1016/j.bmcl.2006.10.042] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2006] [Revised: 09/25/2006] [Accepted: 10/10/2006] [Indexed: 11/26/2022]
Abstract
A small molecule library of 1,3-dioxoisoindoline-5-carboxamides 4 was designed based on the pharmacophore model, synthesized and biologically evaluated as potential T-type calcium channel blockers. The most active compounds 4d and 4n show T-type calcium channel blocking activity with IC50 values of 0.93 and 0.96 microM, respectively.
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Affiliation(s)
- Hwa Sil Kim
- Life Sciences Division, Korea Institute of Science and Technology, PO Box 131, Cheongryang, Seoul 130-650, Republic of Korea
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28
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Lee JY, Park SJ, Park SJ, Lee MJ, Rhim H, Seo SH, Kim KS. Growth inhibition of human cancer cells in vitro by T-type calcium channel blockers. Bioorg Med Chem Lett 2006; 16:5014-7. [PMID: 16876410 DOI: 10.1016/j.bmcl.2006.07.046] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2006] [Revised: 06/03/2006] [Accepted: 07/17/2006] [Indexed: 11/24/2022]
Abstract
This paper describes the preliminary biological results that novel T-type calcium channel blockers inhibit the growth of human cancer cells by blocking calcium influx into the cell, based on unknown mechanism on the cell cycle responsible for cellular proliferation. Among the selected compounds from compound library, compound 9c (KYS05041) was identified to be nearly equipotent with Cisplatin against some human cancers in the micromolar range.
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Affiliation(s)
- Jae Yeol Lee
- Research Institute for Basic Sciences and Department of Chemistry, College of Sciences, Kyung Hee University, 1 Hoegi-Dong, Seoul 130-701, Republic of Korea.
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29
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Ku IW, Cho S, Doddareddy MR, Jang MS, Keum G, Lee JH, Chung BY, Kim Y, Rhim H, Kang SB. Morpholin-2-one derivatives as novel selective T-type Ca2+ channel blockers. Bioorg Med Chem Lett 2006; 16:5244-8. [PMID: 16876404 DOI: 10.1016/j.bmcl.2006.05.031] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2006] [Revised: 05/02/2006] [Accepted: 05/08/2006] [Indexed: 11/18/2022]
Abstract
Morpholin-2-one-5-carboxamide derivatives were prepared by using the one-pot Ugi multicomponent reaction and evaluated for blocking effects on T- and N-type Ca(2+) channels. Among them, compound 5i produced the highest potency (IC(50)=0.45+/-0.02 microM), while compounds 5d, 5f, 5k, 5n, 5o, and 6m produced relatively high potency as well as selectivity on T-type Ca(2+) channels. These novel scaffolds showed potent and selective T-type Ca(2+) channel blocking activities.
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Affiliation(s)
- Il Whea Ku
- Life Sciences Division, Korea Institute of Science and Technology, KIST, PO Box 131, Cheongryang, Seoul 130-650, South Korea
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30
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Park SJ, Park SJ, Lee MJ, Rhim H, Kim Y, Lee JH, Chung BY, Lee JY. Synthesis and SAR studies of a novel series of T-type calcium channel blockers. Bioorg Med Chem 2006; 14:3502-11. [PMID: 16434203 DOI: 10.1016/j.bmc.2006.01.005] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2005] [Revised: 12/30/2005] [Accepted: 01/04/2006] [Indexed: 01/01/2023]
Abstract
For the novel, potent, and selective T-type Ca2+ channel blockers, a series of sulfonamido-containing 3,4-dihydroquinazoline derivatives were prepared and evaluated for their blocking actions on T- and N-type Ca2+ channels. Among them, 9c (KYS05064, IC50 = 0.96 +/- 0.22 microM) was found to be as potent as Mibefradil and also showed the highest selectivity for T-type Ca2+ channel with no effect on N-type Ca2+ channel.
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Affiliation(s)
- Seong Jun Park
- Life Sciences Division, Korea Institute of Science and Technology, PO Box 131, Cheongryang, Seoul 130-650, Republic of Korea
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