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Lu GL, Tong AST, Conole D, Sutherland HS, Choi PJ, Franzblau SG, Upton AM, Lotlikar MU, Cooper CB, Denny WA, Palmer BD. Synthesis and structure-activity relationships for tetrahydroisoquinoline-based inhibitors of Mycobacterium tuberculosis. Bioorg Med Chem 2020; 28:115784. [PMID: 33007562 PMCID: PMC7721589 DOI: 10.1016/j.bmc.2020.115784] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2020] [Revised: 09/05/2020] [Accepted: 09/18/2020] [Indexed: 11/15/2022]
Abstract
A series of 5,8-disubstituted tetrahydroisoquinolines were shown to be effective inhibitors of M. tb in culture and modest inhibitors of M. tb ATP synthase. There was a broad general trend of improved potency with higher lipophilicity. Large substituents (e.g., Bn) at the tetrahydroquinoline 5-position were well-tolerated, while N-methylpiperazine was the preferred 8-substituent. Structure-activity relationships for 7-linked side chains showed that the nature of the 7-linking group was important; –CO– and –COCH2– linkers were less effective than –CH2– or –CONH– ones. This suggests that the positioning of a terminal aromatic ring is important for target binding. Selected compounds showed much faster rates of microsomal clearance than did the clinical ATP synthase inhibitor bedaquiline, and modest inhibition of mycobacterial ATP synthase.
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Affiliation(s)
- Guo-Liang Lu
- Auckland Cancer Society Research Centre, School of Medical Sciences, Private Bag 92019, Auckland 1142, New Zealand
| | - Amy S T Tong
- Auckland Cancer Society Research Centre, School of Medical Sciences, Private Bag 92019, Auckland 1142, New Zealand
| | - Daniel Conole
- Auckland Cancer Society Research Centre, School of Medical Sciences, Private Bag 92019, Auckland 1142, New Zealand
| | - Hamish S Sutherland
- Auckland Cancer Society Research Centre, School of Medical Sciences, Private Bag 92019, Auckland 1142, New Zealand
| | - Peter J Choi
- Auckland Cancer Society Research Centre, School of Medical Sciences, Private Bag 92019, Auckland 1142, New Zealand
| | - Scott G Franzblau
- Institute for Tuberculosis Research, College of Pharmacy, University of Illinois at Chicago, 833 South Wood Street, Chicago, IL 60612, USA
| | - Anna M Upton
- Global Alliance for TB Drug Development, 40 Wall St, NY 10005, USA
| | | | | | - William A Denny
- Auckland Cancer Society Research Centre, School of Medical Sciences, Private Bag 92019, Auckland 1142, New Zealand; Maurice Wilkins Centre, University of Auckland, Private Bag 92019, Auckland 1142, New Zealand.
| | - Brian D Palmer
- Auckland Cancer Society Research Centre, School of Medical Sciences, Private Bag 92019, Auckland 1142, New Zealand; Maurice Wilkins Centre, University of Auckland, Private Bag 92019, Auckland 1142, New Zealand
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2
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Chan WN, Hadley MS, Harling JD, Herdon HJ, Orlek BS, Riley GJ, Stead RE, Stean TO, Thompson M, Upton N, Ward RW. Evaluation of a series of anticonvulsant 1,2,3,4-tetrahydroisoquinolinyl-benzamides. Bioorg Med Chem 2000; 8:2085-94. [PMID: 11003154 DOI: 10.1016/s0968-0896(00)00149-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
SAR studies around a series of N-(tetrahydroisoquinolinyl)-2-methoxybenzamides, identified by high-throughput screening at the novel SB-204269 binding site, have provided compounds such as 13, 29-33 with high affinity and excellent anticonvulsant activity in animal models.
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Affiliation(s)
- W N Chan
- SmithKline Beecham Pharmaceuticals, Harlow, Essex, UK
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3
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Chan WN, Hadley MS, Harling JD, Herdon HJ, Jerman JC, Orlek BS, Stean TO, Thompson M, Upton N, Ward RW. Identification of a series of 1,2,3,4-tetrahydroisoquinolinyl-benzamides with potential anticonvulsant activity. Bioorg Med Chem Lett 1998; 8:2903-6. [PMID: 9873645 DOI: 10.1016/s0960-894x(98)00523-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
A series of N-(tetrahydroisoquinolinyl)-2-methoxybenzamides was identified by high-throughput screening at the novel SB-204269 binding site. SAR studies have provided compounds 4 and 14 with high affinity and good anticonvulsant activity in animal models.
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Affiliation(s)
- W N Chan
- SmithKline Beecham Pharmaceuticals, New Frontiers Science Park, Harlow, Essex, UK
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4
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Rey M, Vergnani T, Dreiding AS. Synthese einiger 8-substituierter 2-Methyl-1,2,3,4-tetrahydroisochinoline. Helv Chim Acta 1985. [DOI: 10.1002/hlca.19850680704] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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6
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Solomons WE, Mathison IW, Jones RH, Wojciechowski NJ, Lawson JW. Synthesis, toxicity, and cardiovascular properties of N-aralkyl- and N-acyl-5-aminoethylindans. J Pharm Sci 1978; 67:314-7. [PMID: 641714 DOI: 10.1002/jps.2600670309] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Secondary amines and amides of 5-aminoethyl-6-methoxyindan and 5-aminoethyl-6-methylindan were synthesized, and the blood pressure lowering effects and accompanying changes in heart rate were evaluated in the unanesthetized desoxycorticosterone acetate hypertensive rat. The acute toxicities of the compounds were determined in mice. The amines were significantly more potent than the amides as antihypertensive agents and also were more toxic. 5-(3,4-Dimethoxybenzyl)aminoethyl-6-methylindan produced the greatest depression in systolic blood pressure at the dose level studied. Structure-activity relationships relevant to blood pressure lowering, heart rate, and toxicity are discussed.
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