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Tantry SJ, Markad SD, Shinde V, Bhat J, Balakrishnan G, Gupta AK, Ambady A, Raichurkar A, Kedari C, Sharma S, Mudugal NV, Narayan A, Naveen Kumar CN, Nanduri R, Bharath S, Reddy J, Panduga V, Prabhakar KR, Kandaswamy K, Saralaya R, Kaur P, Dinesh N, Guptha S, Rich K, Murray D, Plant H, Preston M, Ashton H, Plant D, Walsh J, Alcock P, Naylor K, Collier M, Whiteaker J, McLaughlin RE, Mallya M, Panda M, Rudrapatna S, Ramachandran V, Shandil R, Sambandamurthy VK, Mdluli K, Cooper CB, Rubin H, Yano T, Iyer P, Narayanan S, Kavanagh S, Mukherjee K, Balasubramanian V, Hosagrahara VP, Solapure S, Ravishankar S, Hameed P S. Discovery of Imidazo[1,2-a]pyridine Ethers and Squaramides as Selective and Potent Inhibitors of Mycobacterial Adenosine Triphosphate (ATP) Synthesis. J Med Chem 2017; 60:1379-1399. [PMID: 28075132 DOI: 10.1021/acs.jmedchem.6b01358] [Citation(s) in RCA: 81] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The approval of bedaquiline to treat tuberculosis has validated adenosine triphosphate (ATP) synthase as an attractive target to kill Mycobacterium tuberculosis (Mtb). Herein, we report the discovery of two diverse lead series imidazo[1,2-a]pyridine ethers (IPE) and squaramides (SQA) as inhibitors of mycobacterial ATP synthesis. Through medicinal chemistry exploration, we established a robust structure-activity relationship of these two scaffolds, resulting in nanomolar potencies in an ATP synthesis inhibition assay. A biochemical deconvolution cascade suggested cytochrome c oxidase as the potential target of IPE class of molecules, whereas characterization of spontaneous resistant mutants of SQAs unambiguously identified ATP synthase as its molecular target. Absence of cross resistance against bedaquiline resistant mutants suggested a different binding site for SQAs on ATP synthase. Furthermore, SQAs were found to be noncytotoxic and demonstrated efficacy in a mouse model of tuberculosis infection.
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Affiliation(s)
- Subramanyam J Tantry
- Innovative Medicines, AstraZeneca India Pvt. Ltd. , Bellary Road, Hebbal, Bangalore 560024, India
| | - Shankar D Markad
- Innovative Medicines, AstraZeneca India Pvt. Ltd. , Bellary Road, Hebbal, Bangalore 560024, India
| | - Vikas Shinde
- Innovative Medicines, AstraZeneca India Pvt. Ltd. , Bellary Road, Hebbal, Bangalore 560024, India
| | - Jyothi Bhat
- Innovative Medicines, AstraZeneca India Pvt. Ltd. , Bellary Road, Hebbal, Bangalore 560024, India
| | - Gayathri Balakrishnan
- Innovative Medicines, AstraZeneca India Pvt. Ltd. , Bellary Road, Hebbal, Bangalore 560024, India
| | - Amit K Gupta
- Innovative Medicines, AstraZeneca India Pvt. Ltd. , Bellary Road, Hebbal, Bangalore 560024, India
| | - Anisha Ambady
- Innovative Medicines, AstraZeneca India Pvt. Ltd. , Bellary Road, Hebbal, Bangalore 560024, India
| | - Anandkumar Raichurkar
- Innovative Medicines, AstraZeneca India Pvt. Ltd. , Bellary Road, Hebbal, Bangalore 560024, India
| | - Chaitanyakumar Kedari
- Innovative Medicines, AstraZeneca India Pvt. Ltd. , Bellary Road, Hebbal, Bangalore 560024, India
| | - Sreevalli Sharma
- Innovative Medicines, AstraZeneca India Pvt. Ltd. , Bellary Road, Hebbal, Bangalore 560024, India
| | - Naina V Mudugal
- Innovative Medicines, AstraZeneca India Pvt. Ltd. , Bellary Road, Hebbal, Bangalore 560024, India
| | - Ashwini Narayan
- Innovative Medicines, AstraZeneca India Pvt. Ltd. , Bellary Road, Hebbal, Bangalore 560024, India
| | - C N Naveen Kumar
- Innovative Medicines, AstraZeneca India Pvt. Ltd. , Bellary Road, Hebbal, Bangalore 560024, India
| | - Robert Nanduri
- Innovative Medicines, AstraZeneca India Pvt. Ltd. , Bellary Road, Hebbal, Bangalore 560024, India
| | - Sowmya Bharath
- Innovative Medicines, AstraZeneca India Pvt. Ltd. , Bellary Road, Hebbal, Bangalore 560024, India
| | - Jitendar Reddy
- Innovative Medicines, AstraZeneca India Pvt. Ltd. , Bellary Road, Hebbal, Bangalore 560024, India
| | - Vijender Panduga
- Innovative Medicines, AstraZeneca India Pvt. Ltd. , Bellary Road, Hebbal, Bangalore 560024, India
| | - K R Prabhakar
- Innovative Medicines, AstraZeneca India Pvt. Ltd. , Bellary Road, Hebbal, Bangalore 560024, India
| | - Karthikeyan Kandaswamy
- Innovative Medicines, AstraZeneca India Pvt. Ltd. , Bellary Road, Hebbal, Bangalore 560024, India
| | - Ramanatha Saralaya
- Innovative Medicines, AstraZeneca India Pvt. Ltd. , Bellary Road, Hebbal, Bangalore 560024, India
| | - Parvinder Kaur
- Innovative Medicines, AstraZeneca India Pvt. Ltd. , Bellary Road, Hebbal, Bangalore 560024, India
| | - Neela Dinesh
- Innovative Medicines, AstraZeneca India Pvt. Ltd. , Bellary Road, Hebbal, Bangalore 560024, India
| | - Supreeth Guptha
- Innovative Medicines, AstraZeneca India Pvt. Ltd. , Bellary Road, Hebbal, Bangalore 560024, India
| | - Kirsty Rich
- AstraZeneca , Alderley Park, Mereside, Macclesfield, Cheshire U.K. SK10 4TG
| | - David Murray
- AstraZeneca , Alderley Park, Mereside, Macclesfield, Cheshire U.K. SK10 4TG
| | - Helen Plant
- AstraZeneca , Alderley Park, Mereside, Macclesfield, Cheshire U.K. SK10 4TG
| | - Marian Preston
- AstraZeneca , Alderley Park, Mereside, Macclesfield, Cheshire U.K. SK10 4TG
| | - Helen Ashton
- AstraZeneca , Alderley Park, Mereside, Macclesfield, Cheshire U.K. SK10 4TG
| | - Darren Plant
- AstraZeneca , Alderley Park, Mereside, Macclesfield, Cheshire U.K. SK10 4TG
| | - Jarrod Walsh
- AstraZeneca , Alderley Park, Mereside, Macclesfield, Cheshire U.K. SK10 4TG
| | - Peter Alcock
- AstraZeneca , Alderley Park, Mereside, Macclesfield, Cheshire U.K. SK10 4TG
| | - Kathryn Naylor
- AstraZeneca , Alderley Park, Mereside, Macclesfield, Cheshire U.K. SK10 4TG
| | - Matthew Collier
- AstraZeneca , Alderley Park, Mereside, Macclesfield, Cheshire U.K. SK10 4TG
| | - James Whiteaker
- Infection Innovative Medicines, AstraZeneca , 35 Gatehouse Drive, Waltham, Massachusetts 02451, United States
| | - Robert E McLaughlin
- Infection Innovative Medicines, AstraZeneca , 35 Gatehouse Drive, Waltham, Massachusetts 02451, United States
| | - Meenakshi Mallya
- Innovative Medicines, AstraZeneca India Pvt. Ltd. , Bellary Road, Hebbal, Bangalore 560024, India
| | - Manoranjan Panda
- Innovative Medicines, AstraZeneca India Pvt. Ltd. , Bellary Road, Hebbal, Bangalore 560024, India
| | - Suresh Rudrapatna
- Innovative Medicines, AstraZeneca India Pvt. Ltd. , Bellary Road, Hebbal, Bangalore 560024, India
| | - Vasanthi Ramachandran
- Innovative Medicines, AstraZeneca India Pvt. Ltd. , Bellary Road, Hebbal, Bangalore 560024, India
| | - Radha Shandil
- Innovative Medicines, AstraZeneca India Pvt. Ltd. , Bellary Road, Hebbal, Bangalore 560024, India
| | - Vasan K Sambandamurthy
- Innovative Medicines, AstraZeneca India Pvt. Ltd. , Bellary Road, Hebbal, Bangalore 560024, India
| | - Khisi Mdluli
- Global Alliance for TB Drug Development , 40 Wall Street, 24th Floor, New York, New York 10005, United States
| | - Christopher B Cooper
- Global Alliance for TB Drug Development , 40 Wall Street, 24th Floor, New York, New York 10005, United States
| | - Harvey Rubin
- University of Pennsylvania , 111 Clinical Research Building, 415 Curie Boulevard, Philadelphia Pennsylvania 19104, United States
| | - Takahiro Yano
- University of Pennsylvania , 111 Clinical Research Building, 415 Curie Boulevard, Philadelphia Pennsylvania 19104, United States
| | - Pravin Iyer
- Innovative Medicines, AstraZeneca India Pvt. Ltd. , Bellary Road, Hebbal, Bangalore 560024, India
| | - Shridhar Narayanan
- Innovative Medicines, AstraZeneca India Pvt. Ltd. , Bellary Road, Hebbal, Bangalore 560024, India
| | - Stefan Kavanagh
- AstraZeneca , Alderley Park, Mereside, Macclesfield, Cheshire U.K. SK10 4TG
| | - Kakoli Mukherjee
- Innovative Medicines, AstraZeneca India Pvt. Ltd. , Bellary Road, Hebbal, Bangalore 560024, India
| | - V Balasubramanian
- Innovative Medicines, AstraZeneca India Pvt. Ltd. , Bellary Road, Hebbal, Bangalore 560024, India
| | - Vinayak P Hosagrahara
- Innovative Medicines, AstraZeneca India Pvt. Ltd. , Bellary Road, Hebbal, Bangalore 560024, India
| | - Suresh Solapure
- Innovative Medicines, AstraZeneca India Pvt. Ltd. , Bellary Road, Hebbal, Bangalore 560024, India
| | - Sudha Ravishankar
- Innovative Medicines, AstraZeneca India Pvt. Ltd. , Bellary Road, Hebbal, Bangalore 560024, India
| | - Shahul Hameed P
- Innovative Medicines, AstraZeneca India Pvt. Ltd. , Bellary Road, Hebbal, Bangalore 560024, India
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Peshkov VA, Peshkov AA, Pereshivko OP, Van Hecke K, Zamigaylo LL, Van der Eycken EV, Gorobets NY. Three-component reaction of a 2-aminoazine, a 2-oxoaldehyde, and a cyclic 1,3-dicarbonyl compound for the synthesis of imidazo[1,2-a]azine derivatives. ACS COMBINATORIAL SCIENCE 2014; 16:535-42. [PMID: 25170540 DOI: 10.1021/co5000695] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A three-component reaction of a 2-aminoazine, a 2-oxoaldehyde, and a cyclic 1,3-dicarbonyl compound providing access toward a novel class of imidazo[1,2-a]azine derivatives was developed and studied. The scope of the process was thoroughly explored under three different reaction conditions resulting in the generation of a small library of title compounds and highlighting the possibility of case-specific approach.
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Affiliation(s)
- Vsevolod A. Peshkov
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, University of Leuven (KU Leuven), Celestijnenlaan 200F, B-3001, Leuven, Belgium
| | - Anatoly A. Peshkov
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, University of Leuven (KU Leuven), Celestijnenlaan 200F, B-3001, Leuven, Belgium
| | - Olga P. Pereshivko
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, University of Leuven (KU Leuven), Celestijnenlaan 200F, B-3001, Leuven, Belgium
| | - Kristof Van Hecke
- Department
of Inorganic and Physical Chemistry, Gent University, Krijgslaan
281 S3, B-9000, Gent, Belgium
| | - Lali L. Zamigaylo
- SSI “Institute for Single Crystals” of National Academy of Science of Ukraine, Lenin Avenue 60, Kharkiv 61001, Ukraine
| | - Erik V. Van der Eycken
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, University of Leuven (KU Leuven), Celestijnenlaan 200F, B-3001, Leuven, Belgium
| | - Nikolay Yu. Gorobets
- SSI “Institute for Single Crystals” of National Academy of Science of Ukraine, Lenin Avenue 60, Kharkiv 61001, Ukraine
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