1
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Sherwood AM, Crowley RS, Paton KF, Biggerstaff A, Neuenswander B, Day VW, Kivell BM, Prisinzano TE. Addressing Structural Flexibility at the A-Ring on Salvinorin A: Discovery of a Potent Kappa-Opioid Agonist with Enhanced Metabolic Stability. J Med Chem 2017; 60:3866-3878. [PMID: 28376298 DOI: 10.1021/acs.jmedchem.7b00148] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Previous structure-activity studies on the neoclerodane diterpenoid salvinorin A have demonstrated the importance of the acetoxy functionality on the A-ring in its activity as a κ-opioid receptor agonist. Few studies have focused on understanding the role of conformation in these interactions. Herein we describe the synthesis and evaluation of both flexible and conformationally restricted compounds derived from salvinorin A. One such compound, spirobutyrolactone 14, was synthesized in a single step from salvinorin B and had similar potency and selectivity to salvinorin A (EC50 = 0.6 ± 0.2 nM at κ; >10000 nM at μ and δ). Microsomal stability studies demonstrated that 14 was more metabolically resistant than salvinorin A. Evaluation of analgesic and anti-inflammatory properties revealed similar in vivo effects between 14 and salvinorin A. To our knowledge, this study represents the first example of bioisosteric replacement of an acetate group by a spirobutyrolactone to produce a metabolically resistant derivative.
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Affiliation(s)
- Alexander M Sherwood
- Department of Medicinal Chemistry, School of Pharmacy, The University of Kansas , Lawrence, Kansas 66045, United States
| | - Rachel Saylor Crowley
- Department of Medicinal Chemistry, School of Pharmacy, The University of Kansas , Lawrence, Kansas 66045, United States
| | - Kelly F Paton
- School of Biological Sciences, Centre for Biodiscovery, Victoria University of Wellington , Wellington 6012, New Zealand
| | - Andrew Biggerstaff
- School of Biological Sciences, Centre for Biodiscovery, Victoria University of Wellington , Wellington 6012, New Zealand
| | - Benjamin Neuenswander
- Department of Medicinal Chemistry, School of Pharmacy, The University of Kansas , Lawrence, Kansas 66045, United States
| | - Victor W Day
- Department of Chemistry, The University of Kansas , Lawrence, Kansas 66045, United States
| | - Bronwyn M Kivell
- School of Biological Sciences, Centre for Biodiscovery, Victoria University of Wellington , Wellington 6012, New Zealand
| | - Thomas E Prisinzano
- Department of Medicinal Chemistry, School of Pharmacy, The University of Kansas , Lawrence, Kansas 66045, United States
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2
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Roy S, Šileikytė J, Neuenswander B, Hedrick MP, Chung TDY, Aubé J, Schoenen FJ, Forte MA, Bernardi P. N-Phenylbenzamides as Potent Inhibitors of the Mitochondrial Permeability Transition Pore. ChemMedChem 2015; 11:283-8. [PMID: 26693836 DOI: 10.1002/cmdc.201500545] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2015] [Indexed: 12/21/2022]
Abstract
Persistent opening of the mitochondrial permeability transition pore (PTP), an inner membrane channel, leads to mitochondrial dysfunction and renders the PTP a therapeutic target for a host of life-threatening diseases. Herein, we report our effort toward identifying small-molecule inhibitors of this target through structure-activity relationship optimization studies, which led to the identification of several potent analogues around the N-phenylbenzamide compound series identified by high-throughput screening. In particular, compound 4 (3-(benzyloxy)-5-chloro-N-(4-(piperidin-1-ylmethyl)phenyl)benzamide) displayed noteworthy inhibitory activity in the mitochondrial swelling assay (EC50 =280 nm), poor-to-very-good physicochemical as well as in vitro pharmacokinetic properties, and conferred very high calcium retention capacity to mitochondria. From the data, we believe compound 4 in this series represents a promising lead for the development of PTP inhibitors of pharmacological relevance.
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Affiliation(s)
- Sudeshna Roy
- University of Kansas Specialized Chemistry Center, 2034 Becker Drive, Lawrence, KS, 66049, USA. .,Division of Chemical Biology and Medicinal Chemistry and the Center for Integrative Chemical Biology and Drug Discovery, UNC Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, NC, 27599, USA.
| | - Justina Šileikytė
- CNR Neuroscience Institute and Department of Biomedical Sciences, University of Padova, Via Ugo Bassi 58/B, Padova, 35131, Italy
| | - Benjamin Neuenswander
- University of Kansas Specialized Chemistry Center, 2034 Becker Drive, Lawrence, KS, 66049, USA
| | - Michael P Hedrick
- Conrad Prebys Center for Chemical Genomics, Sanford Burnham Prebys Medical Discovery Institute, 10901 N. Torrey Pines Road, La Jolla, CA, 92037, USA
| | - Thomas D Y Chung
- Office of Translation to Practice, Mayo Clinic, Rochester, MN, 55905, USA
| | - Jeffrey Aubé
- University of Kansas Specialized Chemistry Center, 2034 Becker Drive, Lawrence, KS, 66049, USA
| | - Frank J Schoenen
- University of Kansas Specialized Chemistry Center, 2034 Becker Drive, Lawrence, KS, 66049, USA.
| | - Michael A Forte
- Vollum Institute, Oregon Health & Science University, 3181 S.W. Sam Jackson Park Road, Portland, OR, 97239, USA.
| | - Paolo Bernardi
- CNR Neuroscience Institute and Department of Biomedical Sciences, University of Padova, Via Ugo Bassi 58/B, Padova, 35131, Italy.
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3
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He S, Jain P, Lin B, Ferrer M, Hu Z, Southall N, Hu X, Zheng W, Neuenswander B, Cho CH, Chen Y, Worlikar SA, Aubé J, Larock RC, Schoenen FJ, Marugan JJ, Liang TJ, Frankowski KJ. High-Throughput Screening, Discovery, and Optimization To Develop a Benzofuran Class of Hepatitis C Virus Inhibitors. ACS Comb Sci 2015; 17:641-52. [PMID: 26332742 DOI: 10.1021/acscombsci.5b00101] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Using a high-throughput, cell-based HCV luciferase reporter assay to screen a diverse small-molecule compound collection (∼ 300,000 compounds), we identified a benzofuran compound class of HCV inhibitors. The optimization of the benzofuran scaffold led to the identification of several exemplars with potent inhibition (EC50 < 100 nM) of HCV, low cytotoxicity (CC50 > 25 μM), and excellent selectivity (selective index = CC50/EC50, > 371-fold). The structure-activity studies culminated in the design and synthesis of a 45-compound library to comprehensively explore the anti-HCV activity. The identification, design, synthesis, and biological characterization for this benzofuran series is discussed.
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Affiliation(s)
- Shanshan He
- Liver
Diseases Branch, National Institute of Diabetes and Digestive and
Kidney Diseases, National Institutes of Health, 10 Center Drive, Bethesda, Maryland 20892, United States
| | | | - Billy Lin
- Liver
Diseases Branch, National Institute of Diabetes and Digestive and
Kidney Diseases, National Institutes of Health, 10 Center Drive, Bethesda, Maryland 20892, United States
| | - Marc Ferrer
- NIH
Chemical Genomics Center, Division of Preclinical Innovation, National
Center for Advancing Translational Sciences, National Institutes of Health, 9800 Medical Center Drive, Rockville, Maryland 20850, United States
| | - Zongyi Hu
- Liver
Diseases Branch, National Institute of Diabetes and Digestive and
Kidney Diseases, National Institutes of Health, 10 Center Drive, Bethesda, Maryland 20892, United States
| | - Noel Southall
- NIH
Chemical Genomics Center, Division of Preclinical Innovation, National
Center for Advancing Translational Sciences, National Institutes of Health, 9800 Medical Center Drive, Rockville, Maryland 20850, United States
| | - Xin Hu
- NIH
Chemical Genomics Center, Division of Preclinical Innovation, National
Center for Advancing Translational Sciences, National Institutes of Health, 9800 Medical Center Drive, Rockville, Maryland 20850, United States
| | - Wei Zheng
- NIH
Chemical Genomics Center, Division of Preclinical Innovation, National
Center for Advancing Translational Sciences, National Institutes of Health, 9800 Medical Center Drive, Rockville, Maryland 20850, United States
| | | | | | | | | | | | | | | | - Juan J. Marugan
- NIH
Chemical Genomics Center, Division of Preclinical Innovation, National
Center for Advancing Translational Sciences, National Institutes of Health, 9800 Medical Center Drive, Rockville, Maryland 20850, United States
| | - T. Jake Liang
- Liver
Diseases Branch, National Institute of Diabetes and Digestive and
Kidney Diseases, National Institutes of Health, 10 Center Drive, Bethesda, Maryland 20892, United States
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4
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Roy S, Šileikytė J, Schiavone M, Neuenswander B, Argenton F, Aubé J, Hedrick MP, Chung TDY, Forte MA, Bernardi P, Schoenen FJ. Discovery, Synthesis, and Optimization of Diarylisoxazole-3-carboxamides as Potent Inhibitors of the Mitochondrial Permeability Transition Pore. ChemMedChem 2015; 10:1655-71. [PMID: 26286375 DOI: 10.1002/cmdc.201500284] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2015] [Indexed: 01/23/2023]
Abstract
The mitochondrial permeability transition pore (mtPTP) is a Ca(2+) -requiring mega-channel which, under pathological conditions, leads to the deregulated release of Ca(2+) and mitochondrial dysfunction, ultimately resulting in cell death. Although the mtPTP is a potential therapeutic target for many human pathologies, its potential as a drug target is currently unrealized. Herein we describe an optimization effort initiated around hit 1, 5-(3-hydroxyphenyl)-N-(3,4,5-trimethoxyphenyl)isoxazole-3-carboxamide, which was found to possess promising inhibitory activity against mitochondrial swelling (EC50 <0.39 μM) and showed no interference on the inner mitochondrial membrane potential (rhodamine 123 uptake EC50 >100 μM). This enabled the construction of a series of picomolar mtPTP inhibitors that also potently increase the calcium retention capacity of the mitochondria. Finally, the therapeutic potential and in vivo efficacy of one of the most potent analogues, N-(3-chloro-2-methylphenyl)-5-(4-fluoro-3-hydroxyphenyl)isoxazole-3-carboxamide (60), was validated in a biologically relevant zebrafish model of collagen VI congenital muscular dystrophies.
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Affiliation(s)
- Sudeshna Roy
- University of Kansas Specialized Chemistry Center, 2304 Becker Drive, Lawrence, KS 66049 (USA)
| | - Justina Šileikytė
- CNR Neuroscience Institute and Department of Biomedical Sciences, University of Padova, Padova, 35131 (Italy)
| | - Marco Schiavone
- CNR Neuroscience Institute and Department of Biomedical Sciences, University of Padova, Padova, 35131 (Italy)
| | - Benjamin Neuenswander
- University of Kansas Specialized Chemistry Center, 2304 Becker Drive, Lawrence, KS 66049 (USA)
| | | | - Jeffrey Aubé
- University of Kansas Specialized Chemistry Center, 2304 Becker Drive, Lawrence, KS 66049 (USA)
| | - Michael P Hedrick
- Conrad Prebys Center for Chemical Genomics, Sanford-Burnham Medical Research Institute, La Jolla, CA 92037 (USA)
| | - Thomas D Y Chung
- Conrad Prebys Center for Chemical Genomics, Sanford-Burnham Medical Research Institute, La Jolla, CA 92037 (USA)
| | - Michael A Forte
- Vollum Institute, Oregon Health & Science University, Portland, OR 97239 (USA).
| | - Paolo Bernardi
- CNR Neuroscience Institute and Department of Biomedical Sciences, University of Padova, Padova, 35131 (Italy).
| | - Frank J Schoenen
- University of Kansas Specialized Chemistry Center, 2304 Becker Drive, Lawrence, KS 66049 (USA).
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5
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Goller CC, Arshad M, Noah JW, Ananthan S, Evans CW, Nebane NM, Rasmussen L, Sosa M, Tower NA, White EL, Neuenswander B, Porubsky P, Maki BE, Rogers SA, Schoenen F, Seed PC. Lifting the mask: identification of new small molecule inhibitors of uropathogenic Escherichia coli group 2 capsule biogenesis. PLoS One 2014; 9:e96054. [PMID: 24983234 PMCID: PMC4077706 DOI: 10.1371/journal.pone.0096054] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2013] [Accepted: 04/03/2014] [Indexed: 11/18/2022] Open
Abstract
Uropathogenic Escherichia coli (UPEC) is the leading cause of community-acquired urinary tract infections (UTIs), with over 100 million UTIs occurring annually throughout the world. Increasing antimicrobial resistance among UPEC limits ambulatory care options, delays effective treatment, and may increase overall morbidity and mortality from complications such as urosepsis. The polysaccharide capsules of UPEC are an attractive target a therapeutic, based on their importance in defense against the host immune responses; however, the large number of antigenic types has limited their incorporation into vaccine development. The objective of this study was to identify small-molecule inhibitors of UPEC capsule biogenesis. A large-scale screening effort entailing 338,740 compounds was conducted in a cell-based, phenotypic screen for inhibition of capsule biogenesis in UPEC. The primary and concentration-response assays yielded 29 putative inhibitors of capsule biogenesis, of which 6 were selected for further studies. Secondary confirmatory assays identified two highly active agents, named DU003 and DU011, with 50% inhibitory concentrations of 1.0 µM and 0.69 µM, respectively. Confirmatory assays for capsular antigen and biochemical measurement of capsular sugars verified the inhibitory action of both compounds and demonstrated minimal toxicity and off-target effects. Serum sensitivity assays demonstrated that both compounds produced significant bacterial death upon exposure to active human serum. DU011 administration in mice provided near complete protection against a lethal systemic infection with the prototypic UPEC K1 isolate UTI89. This work has provided a conceptually new class of molecules to combat UPEC infection, and future studies will establish the molecular basis for their action along with efficacy in UTI and other UPEC infections.
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Affiliation(s)
- Carlos C Goller
- Department. of Pediatrics, Duke University School of Medicine, Durham, North Carolina, United States of America
| | - Mehreen Arshad
- Department. of Pediatrics, Duke University School of Medicine, Durham, North Carolina, United States of America
| | - James W Noah
- Southern Research Specialized Biocontainment Screening Center, Southern Research Institute, Birmingham, Alabama, United States of America
| | - Subramaniam Ananthan
- Southern Research Specialized Biocontainment Screening Center, Southern Research Institute, Birmingham, Alabama, United States of America
| | - Carrie W Evans
- Southern Research Specialized Biocontainment Screening Center, Southern Research Institute, Birmingham, Alabama, United States of America
| | - N Miranda Nebane
- Southern Research Specialized Biocontainment Screening Center, Southern Research Institute, Birmingham, Alabama, United States of America
| | - Lynn Rasmussen
- Southern Research Specialized Biocontainment Screening Center, Southern Research Institute, Birmingham, Alabama, United States of America
| | - Melinda Sosa
- Southern Research Specialized Biocontainment Screening Center, Southern Research Institute, Birmingham, Alabama, United States of America
| | - Nichole A Tower
- Southern Research Specialized Biocontainment Screening Center, Southern Research Institute, Birmingham, Alabama, United States of America
| | - E Lucile White
- Southern Research Specialized Biocontainment Screening Center, Southern Research Institute, Birmingham, Alabama, United States of America
| | - Benjamin Neuenswander
- Specialized Chemistry Center, University of Kansas, Lawrence, Kansas, United States of America
| | - Patrick Porubsky
- Specialized Chemistry Center, University of Kansas, Lawrence, Kansas, United States of America
| | - Brooks E Maki
- Specialized Chemistry Center, University of Kansas, Lawrence, Kansas, United States of America
| | - Steven A Rogers
- Specialized Chemistry Center, University of Kansas, Lawrence, Kansas, United States of America
| | - Frank Schoenen
- Specialized Chemistry Center, University of Kansas, Lawrence, Kansas, United States of America
| | - Patrick C Seed
- Department. of Pediatrics, Duke University School of Medicine, Durham, North Carolina, United States of America; Department of Molecular Genetics and Microbiology, Duke University School of Medicine, Durham, North Carolina, United States of America; Center for Microbial Pathogenesis, Duke University School of Medicine, Durham, North Carolina, United States of America
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6
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Jain P, Li J, Porubsky P, Neuenswander B, Egan SM, Aubé J, Rogers S. 3-Substituted Biquinolinium Inhibitors of AraC Family Transcriptional Activator VirF from S. flexneri Obtained Through In Situ Chemical Ionization of 3,4-Disubstituted Dihydroquinolines. RSC Adv 2014; 4:39809-39816. [PMID: 25258678 DOI: 10.1039/c4ra08384a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
During a structure-activity relationship optimization campaign to develop an inhibitor of AraC family transcriptional activators, we discovered an unexpected transformation of a previously reported inhibitor that occurs under the assay conditions. Once placed in the assay media, the 3, 4-disubstituted dihydroquinoline core of the active analogue rapidly undergoes a decomposition reaction to a quaternary 3-substituted biquinolinium. Further examination established an SAR for this chemotype while also demonstrating its resilience to irreversible binding of biologically relevant nucleophiles.
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Affiliation(s)
- Prashi Jain
- Center for Chemical Methodologies and Library Development, The University of Kansas, 2034 Becker Drive, Lawrence, Kansas, 66047, USA
| | - Jiaqin Li
- Department of Molecular Biosciences, University of Kansas, Lawrence, KS, USA
| | - Patrick Porubsky
- Center for Chemical Methodologies and Library Development, The University of Kansas, 2034 Becker Drive, Lawrence, Kansas, 66047, USA
| | - Benjamin Neuenswander
- Specialized Chemistry Center, The University of Kansas, 2034 Becker Drive, Lawrence, Kansas 66047, USA
| | - Susan M Egan
- Department of Molecular Biosciences, University of Kansas, Lawrence, KS, USA
| | - Jeffrey Aubé
- Center for Chemical Methodologies and Library Development, The University of Kansas, 2034 Becker Drive, Lawrence, Kansas, 66047, USA ; Specialized Chemistry Center, The University of Kansas, 2034 Becker Drive, Lawrence, Kansas 66047, USA ; University of Kansas Center of Biomedical Research Excellence, Center for Cancer Experimental Therapeutics, 2034 Becker Drive, Lawrence, KS, USA ; Department of Medicinal Chemistry, University of Kansas, Lawrence, KS, USA
| | - Steven Rogers
- University of Kansas Center of Biomedical Research Excellence, Center for Cancer Experimental Therapeutics, 2034 Becker Drive, Lawrence, KS, USA
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7
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Mehta S, Waldo JP, Neuenswander B, Lushington GH, Larock RC. Solution-phase parallel synthesis of a multisubstituted cyclic imidate library. ACS Comb Sci 2013; 15:247-54. [PMID: 23514214 DOI: 10.1021/co3001605] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
The solution-phase parallel synthesis of a diverse 71-member library of multisubstituted cyclic imidates is described. The key intermediates, 3-iodomethylene-containing cyclic imidates, are readily prepared in good to excellent yields by the palladium/copper-catalyzed cross-coupling of various o-iodobenzamides and terminal alkynes, followed by electrophilic cyclization with I2. These cyclic imidates were further functionalized by palladium-catalyzed Suzuki-Miyaura, Sonogashira, carbonylative amidation, and Heck chemistry using sublibraries of commercially available building blocks.
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Affiliation(s)
- Saurabh Mehta
- Department of Chemistry, Iowa State University, Ames, Iowa 50011, United States
- Department of Applied Chemistry, Delhi Technological University, Delhi, 110042 India
| | - Jesse P. Waldo
- Department of Chemistry, Iowa State University, Ames, Iowa 50011, United States
| | - Benjamin Neuenswander
- The University of Kansas NIH Center of Excellence in Chemical Methodologies and Library Development, Lawrence, Kansas 66047, United States
| | - Gerald H. Lushington
- The University of Kansas NIH Center of Excellence in Chemical Methodologies and Library Development, Lawrence, Kansas 66047, United States
| | - Richard C. Larock
- Department of Chemistry, Iowa State University, Ames, Iowa 50011, United States
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8
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Loh JK, Yoon SY, Samarakoon TB, Rolfe A, Porubsky P, Neuenswander B, Lushington GH, Hanson PR. Exploring chemical diversity via a modular reaction pairing strategy. Beilstein J Org Chem 2012; 8:1293-302. [PMID: 23019462 PMCID: PMC3458752 DOI: 10.3762/bjoc.8.147] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2012] [Accepted: 07/09/2012] [Indexed: 12/23/2022] Open
Abstract
The efficient synthesis of an 80-member library of unique benzoxathiazocine 1,1-dioxides by a microwave-assisted, intermolecular nucleophilic aromatic substitution (SNAr) diversification pathway is reported. Eight benzofused sultam cores were generated by means of a sulfonylation/SNAr/Mitsunobu reaction pairing protocol, and subsequently diversified by intermolecular SNAr with ten chiral, non-racemic amine/amino alcohol building blocks. Computational analyses were employed to explore and evaluate the chemical diversity of the library.
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Affiliation(s)
- Joanna K Loh
- Department of Chemistry, The University of Kansas, 1251 Wescoe Hall Drive, Lawrence, KS 66045-7582, USA
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9
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Zang Q, Javed S, Hill D, Ullah F, Bi D, Porubsky P, Neuenswander B, Lushington GH, Santini C, Organ MG, Hanson PR. Automated synthesis of a library of triazolated 1,2,5-thiadiazepane 1,1-dioxides via a double aza-Michael strategy. ACS Comb Sci 2012; 14:456-9. [PMID: 22853708 DOI: 10.1021/co300049u] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The construction of a 96-member library of triazolated 1,2,5-thiadiazepane 1,1-dioxides was performed on a Chemspeed Accelerator (SLT-100) automated parallel synthesis platform, culminating in the successful preparation of 94 out of 96 possible products. The key step, a one-pot, sequential elimination, double-aza-Michael reaction, and [3 + 2] Huisgen cycloaddition pathway has been automated and utilized in the production of two sets of triazolated sultam products.
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Affiliation(s)
- Qin Zang
- Department of Chemistry, University of Kansas, 1251 Wescoe Hall Drive, Lawrence,
Kansas 66045-7582, United States
- The University of Kansas Center for Chemical Methodologies and Library Development (KU-CMLD), 2034 Becker Drive, Del Shankel Structural
Biology Center, Lawrence, Kansas 66047, United States
| | - Salim Javed
- Department of Chemistry, University of Kansas, 1251 Wescoe Hall Drive, Lawrence,
Kansas 66045-7582, United States
- The University of Kansas Center for Chemical Methodologies and Library Development (KU-CMLD), 2034 Becker Drive, Del Shankel Structural
Biology Center, Lawrence, Kansas 66047, United States
| | - David Hill
- The University of Kansas Center for Chemical Methodologies and Library Development (KU-CMLD), 2034 Becker Drive, Del Shankel Structural
Biology Center, Lawrence, Kansas 66047, United States
| | - Farman Ullah
- The University of Kansas Center for Chemical Methodologies and Library Development (KU-CMLD), 2034 Becker Drive, Del Shankel Structural
Biology Center, Lawrence, Kansas 66047, United States
- Department of Chemistry, York University, 4700 Keele Street, Toronto, ON, M3J
1P3 Canada
| | - Danse Bi
- Department of Chemistry, University of Kansas, 1251 Wescoe Hall Drive, Lawrence,
Kansas 66045-7582, United States
| | - Patrick Porubsky
- The University of Kansas Center for Chemical Methodologies and Library Development (KU-CMLD), 2034 Becker Drive, Del Shankel Structural
Biology Center, Lawrence, Kansas 66047, United States
| | - Benjamin Neuenswander
- The University of Kansas Center for Chemical Methodologies and Library Development (KU-CMLD), 2034 Becker Drive, Del Shankel Structural
Biology Center, Lawrence, Kansas 66047, United States
| | - Gerald H. Lushington
- The University of Kansas Center for Chemical Methodologies and Library Development (KU-CMLD), 2034 Becker Drive, Del Shankel Structural
Biology Center, Lawrence, Kansas 66047, United States
| | - Conrad Santini
- The University of Kansas Center for Chemical Methodologies and Library Development (KU-CMLD), 2034 Becker Drive, Del Shankel Structural
Biology Center, Lawrence, Kansas 66047, United States
| | - Michael G. Organ
- The University of Kansas Center for Chemical Methodologies and Library Development (KU-CMLD), 2034 Becker Drive, Del Shankel Structural
Biology Center, Lawrence, Kansas 66047, United States
- Department of Chemistry, York University, 4700 Keele Street, Toronto, ON, M3J
1P3 Canada
| | - Paul R. Hanson
- Department of Chemistry, University of Kansas, 1251 Wescoe Hall Drive, Lawrence,
Kansas 66045-7582, United States
- The University of Kansas Center for Chemical Methodologies and Library Development (KU-CMLD), 2034 Becker Drive, Del Shankel Structural
Biology Center, Lawrence, Kansas 66047, United States
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10
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Cho CH, Shi F, Jung DI, Neuenswander B, Lushington GH, Larock RC. Solution-phase synthesis of a highly substituted furan library. ACS Comb Sci 2012; 14:403-14. [PMID: 22612549 DOI: 10.1021/co300040q] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A library of furans has been synthesized by iodocyclization and further diversified by palladium-catalyzed coupling processes. The key intermediate 3-iodofurans have been prepared by the electrophilic iodocyclization of 2-iodo-2-alken-1-ones in the presence of various nucleophiles in good to excellent yields under mild reaction conditions. These 3-iodofurans are the key components for library generation through subsequent elaboration by palladium-catalyzed processes, such as Suzuki-Miyaura, Sonagashira, Heck, aminocarbonylation, and carboalkoxylation chemistry to afford a diverse set of 2,3,4,5-tetrasubstituted furans.
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Affiliation(s)
- Chul-Hee Cho
- Department of Chemistry, Iowa State University, Ames, Iowa 50011, United States
| | - Feng Shi
- Department of Chemistry, Iowa State University, Ames, Iowa 50011, United States
| | - Dai-Il Jung
- Department of Chemistry, Iowa State University, Ames, Iowa 50011, United States
- Department of Chemistry, Dong-A University, Saha-Gu, Busan 604-714, Korea
| | - Benjamin Neuenswander
- NIH Center of Excellence in Chemical Methodologies and Library Development, University of Kansas, Lawrence, Kansas 66047, United States
| | - Gerald H. Lushington
- NIH Center of Excellence in Chemical Methodologies and Library Development, University of Kansas, Lawrence, Kansas 66047, United States
| | - Richard C. Larock
- Department of Chemistry, Iowa State University, Ames, Iowa 50011, United States
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11
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Ullah F, Zang Q, Javed S, Porubsky P, Neuenswander B, Lushington GH, Hanson PR, Organ MG. Synthesis of an Isoindoline-Annulated, Tricyclic Sultam Library via Microwave-Assisted, Continuous-Flow Organic Synthesis (MACOS). SYNTHESIS-STUTTGART 2012; 44. [PMID: 24244052 DOI: 10.1055/s-0031-1289791] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
A microwave-assisted, continuous-flow organic synthesis (MACOS) protocol for the synthesis of an isoindoline-annulat-ed, tricyclic sultam library, utilizing a Heck-aza-Michael (HaM) strategy, is reported. This sequence involves a Heck reaction on vi-nylsulfonamides with batch microwave heating followed by a one-pot, sequential intramolecular aza-Michael cyclization/Boc-deprot-ection using MACOS. Subsequent cyclization with either 1,1'-carbonyldiimidazole or chloromethyl pivalate using MACOS provided an array of tricyclic sultams. This efficient three-step protocol requires only a few hours to produce the target sultams starting from simple starting materials. Using this strategy, a 38-member library of isoindoline-annulated sultams was generated in good to excellent overall yields (53-87%).
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Affiliation(s)
- Farman Ullah
- Department of Chemistry, York University, 4700 Keele Street, Toronto, ON, M3J 1P3, Canada, Fax +1(416)7365936 ; The University of Kansas Center for Chemical Methodologies and Library Development (KU-CMLD), Del Shankel Structural Biology Center, 2034 Becker Drive, Lawrence, KS 66047-3761, USA, Fax +1(785)8645396
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12
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Faisal S, Ullah F, Maity PK, Rolfe A, Samarakoon TB, Porubsky P, Neuenswander B, Lushington GH, Basha FZ, Organ MG, Hanson PR. Facile (triazolyl)methylation of MACOS-derived benzofused sultams utilizing ROMP-derived OTP reagents. ACS Comb Sci 2012; 14:268-72. [PMID: 22384820 DOI: 10.1021/co2001839] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
A combination of MACOS scale-out and ROMP-derived oligomeric triazole phosphates (OTP(n)) have been successfully utilized for the preparation of a 106-member library of triazole containing benzothiaoxazepine-1,1-dioxides. This report demonstrates the utilization of a suite of soluble OTP(n) reagents for facile (triazolyl)methylation of 10 MACOS-derived sultam scaffolds in purification-free process for parallel synthesis of small molecule collections for HTS.
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Affiliation(s)
- Saqib Faisal
- Department
of Chemistry, University of Kansas, 1251
Wescoe Hall Drive, Lawrence,
Kansas 66045-7582, United States
- H. E. J. Research
Institute
of Chemistry, International Center for Chemical and Biological Science, University of Karachi, Karachi, Pakistan
| | - Farman Ullah
- Department of Chemistry, York University, 4700 Keele Street, Toronto, ON, M3J
1P3, Canada
| | - Pradip K. Maity
- Department
of Chemistry, University of Kansas, 1251
Wescoe Hall Drive, Lawrence,
Kansas 66045-7582, United States
| | - Alan Rolfe
- Department
of Chemistry, University of Kansas, 1251
Wescoe Hall Drive, Lawrence,
Kansas 66045-7582, United States
| | - Thiwanka B. Samarakoon
- Department
of Chemistry, University of Kansas, 1251
Wescoe Hall Drive, Lawrence,
Kansas 66045-7582, United States
| | - Patrick Porubsky
- The University of Kansas Center for Chemical Methodologies and Library Development (KU-CMLD), 2034 Becker Drive, Del Shankel Structural
Biology Center, Lawrence, Kansas 66047, United States
| | - Benjamin Neuenswander
- The University of Kansas Center for Chemical Methodologies and Library Development (KU-CMLD), 2034 Becker Drive, Del Shankel Structural
Biology Center, Lawrence, Kansas 66047, United States
| | - Gerald H. Lushington
- Department
of Chemistry, University of Kansas, 1251
Wescoe Hall Drive, Lawrence,
Kansas 66045-7582, United States
- The University of Kansas Center for Chemical Methodologies and Library Development (KU-CMLD), 2034 Becker Drive, Del Shankel Structural
Biology Center, Lawrence, Kansas 66047, United States
| | - Fatima Z. Basha
- H. E. J. Research
Institute
of Chemistry, International Center for Chemical and Biological Science, University of Karachi, Karachi, Pakistan
| | - Michael G. Organ
- The University of Kansas Center for Chemical Methodologies and Library Development (KU-CMLD), 2034 Becker Drive, Del Shankel Structural
Biology Center, Lawrence, Kansas 66047, United States
- Department of Chemistry, York University, 4700 Keele Street, Toronto, ON, M3J
1P3, Canada
| | - Paul R. Hanson
- Department
of Chemistry, University of Kansas, 1251
Wescoe Hall Drive, Lawrence,
Kansas 66045-7582, United States
- The University of Kansas Center for Chemical Methodologies and Library Development (KU-CMLD), 2034 Becker Drive, Del Shankel Structural
Biology Center, Lawrence, Kansas 66047, United States
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13
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Zang Q, Javed S, Porubsky P, Ullah F, Neuenswander B, Lushington GH, Basha FZ, Organ MG, Hanson PR. Synthesis of a unique isoindoline/tetrahydroisoquinoline-based tricyclic sultam library utilizing a Heck-aza-Michael strategy. ACS Comb Sci 2012; 14:211-7. [PMID: 22311745 DOI: 10.1021/co200181x] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The synthesis of a unique isoindoline- and tetrahydroisoquinoline (THIQ)-containing tricyclic sultam library, utilizing a Heck-aza-Michael (HaM) strategy is reported. Both isoindoline and THIQ rings are installed through a Heck reaction on a vinylsulfonamide, followed by one-pot deprotection and intramolecular aza-Michael reaction. Subsequent cyclization with either paraformaldehyde condensation or 1,1'-carbonyldiimidazole coupling generates a variety of tricyclic sultams. Overall, a 160-member library of these sultams, together with their isoindolines/THIQ and secondary sulfonamides precursors, were constructed using this strategy.
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Affiliation(s)
- Qin Zang
- Department
of Chemistry, University of Kansas, 1251
Wescoe Hall Drive, Lawrence,
Kansas 66045-7582, United States
| | - Salim Javed
- Department
of Chemistry, University of Kansas, 1251
Wescoe Hall Drive, Lawrence,
Kansas 66045-7582, United States
- H. E. J. Research Institute
of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Pakistan
| | - Patrick Porubsky
- The University of Kansas Center for Chemical Methodologies and Library Development (KU-CMLD), 2034 Becker Drive, Del Shankel Structural Biology Center, Lawrence,
Kansas 66047-3761, United States
| | - Farman Ullah
- Department of Chemistry, York University, 4700 Keele Street, Toronto, ON, M3J
1P3 Canada
| | - Benjamin Neuenswander
- The University of Kansas Center for Chemical Methodologies and Library Development (KU-CMLD), 2034 Becker Drive, Del Shankel Structural Biology Center, Lawrence,
Kansas 66047-3761, United States
| | - Gerald H. Lushington
- Department
of Chemistry, University of Kansas, 1251
Wescoe Hall Drive, Lawrence,
Kansas 66045-7582, United States
- The University of Kansas Center for Chemical Methodologies and Library Development (KU-CMLD), 2034 Becker Drive, Del Shankel Structural Biology Center, Lawrence,
Kansas 66047-3761, United States
| | - Fatima Z. Basha
- H. E. J. Research Institute
of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Pakistan
| | - Michael G. Organ
- Department of Chemistry, York University, 4700 Keele Street, Toronto, ON, M3J
1P3 Canada
| | - Paul R. Hanson
- Department
of Chemistry, University of Kansas, 1251
Wescoe Hall Drive, Lawrence,
Kansas 66045-7582, United States
- The University of Kansas Center for Chemical Methodologies and Library Development (KU-CMLD), 2034 Becker Drive, Del Shankel Structural Biology Center, Lawrence,
Kansas 66047-3761, United States
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14
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Rolfe A, Ullah F, Samarakoon TB, Kurtz RD, Porubsky P, Neuenswander B, Lushington GH, Santini C, Organ MG, Hanson PR. Synthesis of amino-benzothiaoxazepine-1,1-dioxides utilizing a microwave-assisted, S(N)Ar protocol. ACS Comb Sci 2011; 13:653-8. [PMID: 21902243 DOI: 10.1021/co200076j] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
The development of a microwave-assisted, intermolecular S(N)Ar protocol for the synthesis of a 126-member benzothiaoxazepine-1,1-dioxide library is reported. Diversification of 12 benzothiaoxazepine-1,1-dioxides was achieved in rapid fashion utilizing a variety of 2° amines and amino alcohols to generate an 80-member library. A second 48-member library was subsequently generated via a two-step alkylation, intermolecular S(N)Ar diversification protocol.
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Affiliation(s)
- Alan Rolfe
- Department of Chemistry, University of Kansas, 1251 Wescoe Hall Drive, Lawrence, Kansas 66045-7582, United States
| | - Farman Ullah
- Department of Chemistry, York University, 4700 Keele Street, Toronto, ON, M3J 1P3, Canada
| | - Thiwanka B. Samarakoon
- Department of Chemistry, University of Kansas, 1251 Wescoe Hall Drive, Lawrence, Kansas 66045-7582, United States
| | - Ryan D. Kurtz
- Department of Chemistry, University of Kansas, 1251 Wescoe Hall Drive, Lawrence, Kansas 66045-7582, United States
| | - Patrick Porubsky
- The University of Kansas Center for Chemical Methodologies and Library Development (KU-CMLD), 2034 Becker Drive, Del Shankel Structural Biology Center, Lawrence, Kansas 66047, United States
| | - Benjamin Neuenswander
- The University of Kansas Center for Chemical Methodologies and Library Development (KU-CMLD), 2034 Becker Drive, Del Shankel Structural Biology Center, Lawrence, Kansas 66047, United States
| | - Gerald H. Lushington
- Department of Chemistry, University of Kansas, 1251 Wescoe Hall Drive, Lawrence, Kansas 66045-7582, United States
- The University of Kansas Center for Chemical Methodologies and Library Development (KU-CMLD), 2034 Becker Drive, Del Shankel Structural Biology Center, Lawrence, Kansas 66047, United States
| | - Conrad Santini
- The University of Kansas Center for Chemical Methodologies and Library Development (KU-CMLD), 2034 Becker Drive, Del Shankel Structural Biology Center, Lawrence, Kansas 66047, United States
| | - Michael G. Organ
- Department of Chemistry, York University, 4700 Keele Street, Toronto, ON, M3J 1P3, Canada
| | - Paul R. Hanson
- Department of Chemistry, University of Kansas, 1251 Wescoe Hall Drive, Lawrence, Kansas 66045-7582, United States
- The University of Kansas Center for Chemical Methodologies and Library Development (KU-CMLD), 2034 Becker Drive, Del Shankel Structural Biology Center, Lawrence, Kansas 66047, United States
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15
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Kumar S, Painter TO, Pal BK, Neuenswander B, Malinakova HC. Application of sequential Cu(I)/Pd(0)-catalysis to solution-phase parallel synthesis of combinatorial libraries of dihydroindeno[1,2-c]isoquinolines. ACS Comb Sci 2011; 13:466-77. [PMID: 21528920 DOI: 10.1021/co200027c] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Parallel solution-phase synthesis of combinatorial libraries of dihydroindenoisoquinolines employing a sequential Cu(I)/Pd(0)-catalyzed multicomponent coupling and annulation protocol was realized. The scope and limitations of the protocol with respect to the substitution pattern in the aryl ring of the indene core, as well as the N-substituent have been defined, revealing that the methodology is compatible with a wide-range of aliphatic linear, branched, and ester functionalized N-substituents. Unexpectedly, the formation of regioisomers featuring a 1,2,3-contiguous substitution pattern in the aromatic ring of the indene core was observed. Three distinct combinatorial libraries with a total of 111 of members were synthesized, and 80 highly substituted dihydroindenoisoquinolines structurally related to known medicinal agents including some consisting of mixtures of two regioisomers were made available for biological activity testing.
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Affiliation(s)
- Sarvesh Kumar
- Department of Chemistry, The University of Kansas, 1251 Wescoe Hall Drive, Lawrence, Kansas 66045, United States, and Center of Excellence in Chemical Methodologies and Library Development, The University of Kansas, 2034 Becker Drive, Shankel Structural Biology Center, West Campus Lawrence, Kansas 66047-3761, United States
| | - Thomas O. Painter
- Department of Chemistry, The University of Kansas, 1251 Wescoe Hall Drive, Lawrence, Kansas 66045, United States, and Center of Excellence in Chemical Methodologies and Library Development, The University of Kansas, 2034 Becker Drive, Shankel Structural Biology Center, West Campus Lawrence, Kansas 66047-3761, United States
| | - Benoy K. Pal
- Department of Chemistry, The University of Kansas, 1251 Wescoe Hall Drive, Lawrence, Kansas 66045, United States, and Center of Excellence in Chemical Methodologies and Library Development, The University of Kansas, 2034 Becker Drive, Shankel Structural Biology Center, West Campus Lawrence, Kansas 66047-3761, United States
| | - Benjamin Neuenswander
- Department of Chemistry, The University of Kansas, 1251 Wescoe Hall Drive, Lawrence, Kansas 66045, United States, and Center of Excellence in Chemical Methodologies and Library Development, The University of Kansas, 2034 Becker Drive, Shankel Structural Biology Center, West Campus Lawrence, Kansas 66047-3761, United States
| | - Helena C. Malinakova
- Department of Chemistry, The University of Kansas, 1251 Wescoe Hall Drive, Lawrence, Kansas 66045, United States, and Center of Excellence in Chemical Methodologies and Library Development, The University of Kansas, 2034 Becker Drive, Shankel Structural Biology Center, West Campus Lawrence, Kansas 66047-3761, United States
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16
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Rolfe A, Painter TO, Asad N, Hur MY, Jeon KO, Brzozowski M, Klimberg SV, Porubsky P, Neuenswander B, Lushington GH, Santini C, Hanson PR. Triazole-containing isothiazolidine 1,1-dioxide library synthesis: one-pot, multi-component protocols for small molecular probe discovery. ACS Comb Sci 2011; 13:511-7. [PMID: 21866904 DOI: 10.1021/co200093c] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The construction of two libraries of triazole-containing isothiazolidine 1,1-dioxides is reported utilizing either a one-pot click/aza-Michael or click/OACC esterification protocol. One core dihydroisothiazole 1,1-dioxide scaffold was prepared rapidly on multigram scale via ring-closing metathesis (RCM) and was subjected to a one-pot multicomponent click/aza-Michael protocol with an array of amines and azides for the generation of a 180-member triazole-containing isothiazolidine 1,1-dioxide library. Alternatively, three daughter scaffolds were generated via the aza-Michael of three amino alcohols, followed by a one-pot, multicomponent click/esterification protocol utilizing a ring-opening metathesis polymerization (ROMP)-derived coupling reagent, oligomeric alkyl carbodiimide (OACC) to generate a 41-member library of triazole-containing isothiazole 1,1-dioxides.
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Affiliation(s)
- Alan Rolfe
- Department of Chemistry, University of Kansas, 1251 Wescoe Hall Drive, Lawrence, Kansas 66045-7582, United States
| | - Thomas O. Painter
- The University of Kansas Center for Chemical Methodologies and Library Development (KU-CMLD), 2034 Becker Drive, Del Shankel Structural Biology Center, Lawrence, Kansas 66047, United States
| | - Naeem Asad
- Department of Chemistry, University of Kansas, 1251 Wescoe Hall Drive, Lawrence, Kansas 66045-7582, United States
| | - Moon Young Hur
- Department of Chemistry, University of Kansas, 1251 Wescoe Hall Drive, Lawrence, Kansas 66045-7582, United States
- The University of Kansas Center for Chemical Methodologies and Library Development (KU-CMLD), 2034 Becker Drive, Del Shankel Structural Biology Center, Lawrence, Kansas 66047, United States
| | - Kyu Ok Jeon
- Department of Chemistry, University of Kansas, 1251 Wescoe Hall Drive, Lawrence, Kansas 66045-7582, United States
- The University of Kansas Center for Chemical Methodologies and Library Development (KU-CMLD), 2034 Becker Drive, Del Shankel Structural Biology Center, Lawrence, Kansas 66047, United States
| | - Marek Brzozowski
- Department of Chemistry, University of Kansas, 1251 Wescoe Hall Drive, Lawrence, Kansas 66045-7582, United States
| | - Sarra V. Klimberg
- Department of Chemistry, University of Kansas, 1251 Wescoe Hall Drive, Lawrence, Kansas 66045-7582, United States
| | - Patrick Porubsky
- The University of Kansas Center for Chemical Methodologies and Library Development (KU-CMLD), 2034 Becker Drive, Del Shankel Structural Biology Center, Lawrence, Kansas 66047, United States
| | - Benjamin Neuenswander
- The University of Kansas Center for Chemical Methodologies and Library Development (KU-CMLD), 2034 Becker Drive, Del Shankel Structural Biology Center, Lawrence, Kansas 66047, United States
| | - Gerald H. Lushington
- Department of Chemistry, University of Kansas, 1251 Wescoe Hall Drive, Lawrence, Kansas 66045-7582, United States
- The University of Kansas Center for Chemical Methodologies and Library Development (KU-CMLD), 2034 Becker Drive, Del Shankel Structural Biology Center, Lawrence, Kansas 66047, United States
| | - Conrad Santini
- The University of Kansas Center for Chemical Methodologies and Library Development (KU-CMLD), 2034 Becker Drive, Del Shankel Structural Biology Center, Lawrence, Kansas 66047, United States
| | - Paul R. Hanson
- Department of Chemistry, University of Kansas, 1251 Wescoe Hall Drive, Lawrence, Kansas 66045-7582, United States
- The University of Kansas Center for Chemical Methodologies and Library Development (KU-CMLD), 2034 Becker Drive, Del Shankel Structural Biology Center, Lawrence, Kansas 66047, United States
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17
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Cho CH, Jung DI, Neuenswander B, Larock RC. Parallel synthesis of a desketoraloxifene analogue library via iodocyclization/palladium-catalyzed coupling. ACS Comb Sci 2011; 13:501-10. [PMID: 21721520 DOI: 10.1021/co200090p] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
For a future structure-activity relationship (SAR) study, a library of desketoraloxifene analogues has been prepared by parallel synthesis using iodocyclization and subsequent palladium-catalyzed coupling reactions. Points of desketoraloxifene diversification involve the two phenolic hydroxyl groups and the aliphatic amine side chain. This approach affords oxygen-bearing 3-iodobenzo[b]thiophenes 4 in excellent yields, which are easily further elaborated using a two-step approach involving Suzuki-Miyaura and Mitsunobu coupling reactions to give multimethoxy-substituted desketoraloxifene analogues 6. Various hydroxyl-substituted desketoraloxifene analogues 7 were subsequently generated by demethylation with BBr(3).
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Affiliation(s)
- Chul-Hee Cho
- Department of Chemistry, Iowa State University, Ames, Iowa 50011, United States
| | - Dai-Il Jung
- Department of Chemistry, Iowa State University, Ames, Iowa 50011, United States
- Department of Chemistry, Dong-A University, Saha-Gu, Busan 604-714, Korea
| | - Benjamin Neuenswander
- NIH Center of Excellence in Chemical Methodologies and Library Development, University of Kansas, Lawrence, Kansas 66047, United States
| | - Richard C. Larock
- Department of Chemistry, Iowa State University, Ames, Iowa 50011, United States
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18
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Markina NA, Mancuso R, Neuenswander B, Lushington GH, Larock RC. Solution-phase parallel synthesis of a diverse library of 1,2-dihydroisoquinolines. ACS Comb Sci 2011; 13:265-71. [PMID: 21410207 DOI: 10.1021/co1000794] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Synthesis of a 105 membered library of 1,2-dihydroisoquinolines is described. The 1,2-dihydroisoquinoline compounds have been prepared in good yields using a Lewis acid and organocatalyst-cocatalyzed multicomponent reaction of 2-(1-alkynyl)benzaldehydes, amines, and ketones. Various indoles have also been employed as pronucleophiles, furnishing 1-(3-indolyl)-1,2-dihydroisoquinolines. The halogen functionality present in some of the synthesized compounds allows for further diversification by palladium-catalyzed Suzuki−Miyaura and Sonogashira cross-couplings to give more diversified 1,2-dihydroisoquinoline derivatives.
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Affiliation(s)
- Nataliya A. Markina
- Department of Chemistry, Iowa State University, Ames, Iowa 50011, United States
| | - Raffaella Mancuso
- Dipartimento di Chimica, Università della Calabria, 87036 Arcavacata di Rende (CS), Italy
| | - Benjamin Neuenswander
- NIH Center of Excellence in Chemical Methodologies and Library Development, University of Kansas, Lawrence, Kansas 66047, United States
| | - Gerald H. Lushington
- NIH Center of Excellence in Chemical Methodologies and Library Development, University of Kansas, Lawrence, Kansas 66047, United States
| | - Richard C. Larock
- Department of Chemistry, Iowa State University, Ames, Iowa 50011, United States
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19
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Fenster E, Long TR, Zang Q, Hill D, Neuenswander B, Lushington GH, Zhou A, Santini C, Hanson PR. Automated synthesis of a 184-member library of thiadiazepan-1,1-dioxide-4-ones. ACS Comb Sci 2011; 13:244-50. [PMID: 21309582 PMCID: PMC3090501 DOI: 10.1021/co100060x] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The construction of a 225-member (3 × 5 × 15) library of thiadiazepan-1,1-dioxide-4-ones was performed on a Chemspeed Accelerator (SLT-100) automated parallel synthesis platform, culminating in the successful preparation of 184/225 sultams. Three sultam core scaffolds were prepared based upon the utilization of an aza-Michael reaction on a multifunctional vinyl sulfonamide linchpin. The library exploits peripheral diversity in the form of a sequential, two-step [3 + 2] Huisgen cycloaddition/Pd-catalyzed Suzuki-Miyaura coupling sequence.
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Affiliation(s)
- Erik Fenster
- Center for Chemical Methodologies and Library Development at the University of Kansas (KU-CMLD), 2034 Becker Drive, Delbert M. Shankel Structural Biology Center, Lawrence, Kansas 66047, United States
| | - Toby R. Long
- Center for Chemical Methodologies and Library Development at the University of Kansas (KU-CMLD), 2034 Becker Drive, Delbert M. Shankel Structural Biology Center, Lawrence, Kansas 66047, United States
- Department of Chemistry, University of Kansas, 1251 Wescoe Hall Drive, Lawrence, Kansas 66045, United States
| | - Qin Zang
- Department of Chemistry, University of Kansas, 1251 Wescoe Hall Drive, Lawrence, Kansas 66045, United States
| | - David Hill
- Center for Chemical Methodologies and Library Development at the University of Kansas (KU-CMLD), 2034 Becker Drive, Delbert M. Shankel Structural Biology Center, Lawrence, Kansas 66047, United States
| | - Benjamin Neuenswander
- Center for Chemical Methodologies and Library Development at the University of Kansas (KU-CMLD), 2034 Becker Drive, Delbert M. Shankel Structural Biology Center, Lawrence, Kansas 66047, United States
| | - Gerald H. Lushington
- Center for Chemical Methodologies and Library Development at the University of Kansas (KU-CMLD), 2034 Becker Drive, Delbert M. Shankel Structural Biology Center, Lawrence, Kansas 66047, United States
| | - Aihua Zhou
- Department of Chemistry, University of Kansas, 1251 Wescoe Hall Drive, Lawrence, Kansas 66045, United States
| | - Conrad Santini
- Center for Chemical Methodologies and Library Development at the University of Kansas (KU-CMLD), 2034 Becker Drive, Delbert M. Shankel Structural Biology Center, Lawrence, Kansas 66047, United States
- Department of Chemistry, University of Kansas, 1251 Wescoe Hall Drive, Lawrence, Kansas 66045, United States
| | - Paul R. Hanson
- Center for Chemical Methodologies and Library Development at the University of Kansas (KU-CMLD), 2034 Becker Drive, Delbert M. Shankel Structural Biology Center, Lawrence, Kansas 66047, United States
- Department of Chemistry, University of Kansas, 1251 Wescoe Hall Drive, Lawrence, Kansas 66045, United States
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20
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Rolfe A, Samarakoon TB, Klimberg SV, Brzozowski M, Neuenswander B, Lushington GH, Hanson PR. S(N)Ar-based, facile synthesis of a library of benzothiaoxazepine-1,1'-dioxides. ACTA ACUST UNITED AC 2010; 12:850-4. [PMID: 20879738 DOI: 10.1021/cc1001023] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
The construction of a library of benzothiaoxazepine-1,1'-dioxides utilizing a one-pot, S(N)Ar diversification-ODCT(50) scavenging protocol is reported. This protocol combines microwave irradiation to facilitate the reaction, in conjunction with a soluble ROMP-derived scavenger (ODCT) to afford the desired products in good overall purity. Utilizing this protocol, a 78-member library was successfully synthesized and submitted for biological evaluation.
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Affiliation(s)
- Alan Rolfe
- Department of Chemistry, University of Kansas, 1251 Wescoe Hall Drive, Lawrence, Kansas 66045-7582, USA
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21
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Rolfe A, Young K, Volp K, Schoenen F, Neuenswander B, Lushington GH, Hanson PR. One-pot, three-component, domino Heck-aza-Michael approach to libraries of functionalized 1,1-dioxido-1,2-benzisothiazoline-3-acetic acids. ACTA ACUST UNITED AC 2010; 11:732-8. [PMID: 19505109 DOI: 10.1021/cc900025e] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A sequential three-component synthesis of functionalized benzisothiazoline-3-acetic acid 1,1-dioxides utilizing a domino Heck-aza-Michael pathway is reported. This one-pot procedure rapidly assembles functionalized benzylsulfonamides, which undergo a palladium-catalyzed, domino, Heck-aza-Michael transformation in an experimentally straightforward manner. This attractive protocol has been utilized to synthesize three combinatorial sublibraries (I-III) comprising a total of 95 compounds in high purities (> or =95% for 75 compounds), yield and quantities.
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Affiliation(s)
- Alan Rolfe
- Department of Chemistry, University of Kansas, 1251 Wescoe Hall Drive, Lawrence, KS 66045, USA
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22
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Cho CH, Neuenswander B, Larock RC. Diverse methyl sulfone-containing benzo[b]thiophene library via iodocyclization and palladium-catalyzed coupling. J Comb Chem 2010; 12:278-85. [PMID: 20055500 PMCID: PMC2834800 DOI: 10.1021/cc900172u] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Parallel solution-phase methods for the synthesis of a 72-membered benzo[b]thiophene library are reported. Medicinally interesting, drug-like, methyl sulfone-substituted benzo[b]thiophenes have been prepared by the palladium-catalyzed substitution of 3-iodobenzo[b]thiophenes by Suzuki-Miyaura, Sonogashira, Heck, carboalkoxylation, and aminocarbonylation chemistry. The key intermediates for library generation, methyl sulfone-containing 3-iodobenzo[b]thiophenes, are readily prepared by iodocyclization and oxidation methodologies from readily available alkynes.
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Affiliation(s)
- Chul-Hee Cho
- Department of Chemistry, Iowa State University, Ames, Iowa 50011
| | - Benjamin Neuenswander
- University of Kansas NIH Center of Excellence in Chemical Methodologies and Library Development, Lawrence, Kansas 66047
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23
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Cho CH, Neuenswander B, Lushington GH, Larock RC. Solution-phase parallel synthesis of a multi-substituted benzo[b]thiophene library. ACTA ACUST UNITED AC 2009; 11:900-6. [PMID: 19569714 DOI: 10.1021/cc9000604] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Generation of a library using parallel syntheses of multi-substituted benzo[b]thiophenes is described. The requisite 3-iodobenzo[b]thiophenes are readily prepared in excellent yields from various alkynes bearing electron-rich aromatic rings by electrophilic cyclization using I(2) in CH(2)Cl(2). The heteroaromatic carbon-iodine bonds allow further diversification by palladium-catalyzed Suzuki-Miyaura, Sonogashira, Heck, and carboalkoxylation chemistry to give multi-substituted benzo[b]thiophene derivatives.
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Affiliation(s)
- Chul-Hee Cho
- Department of Chemistry, Iowa State University, Ames, Iowa 50011, USA
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24
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Abstract
The solution-phase synthesis of a 167-member library of isocoumarins is described. The key intermediates for library generation, 4-iodoisocoumarins, are easily prepared by iodocyclization of the corresponding 2-(1-alkynyl)arenecarboxylate esters. The 4-iodoisocoumarins undergo palladium-catalyzed Sonogashira, Suzuki-Miyura, and Heck reactions to yield a diverse set of isocoumarins. Alternatively, isocoumarins, bearing hydroxyl or bromine functionalities, have been prepared by ZnCl(2)- and Pd(PPh(3))(4)-mediated cyclization of the corresponding o-iodobenzoic acid and appropriate terminal alkynes. The resulting isocoumarins were further diversified by derivatization of the hydroxyl or bromine groups. A small set of isoquinolinones were also prepared from the corresponding isocoumarins.
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Affiliation(s)
- Sujata Roy
- Department of Chemistry, Iowa State University, Ames, Iowa 50011
| | - Sudipta Roy
- Department of Chemistry, Iowa State University, Ames, Iowa 50011
| | - Benjamin Neuenswander
- The University of Kansas NIH Center of Excellence in Chemical Methodologies and Library Development, Lawrence, Kansas, 66047
| | - David Hill
- The University of Kansas NIH Center of Excellence in Chemical Methodologies and Library Development, Lawrence, Kansas, 66047
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25
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Abstract
A library of 72 quinolones was synthesized from substituted anthranilic acids, using ynone intermediates. These masked β-dicarbonyl synthons allowed cyclization under milder conditions than previously reported quinolone syntheses.
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Affiliation(s)
- Timothy R Ward
- Department of Medicinal Chemistry and Center for Methodology and Library Development, University of Kansas, 1251 Wescoe Hall Drive, Lawrence Kansas 66045, USA; Department of Medicinal Chemistry and the Institute for Therapeutics Discovery and Development, University of Minnesota, 717 Delaware Street SE, Minneapolis, Minnesota 55414, USA
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Roy S, Roy S, Neuenswander B, Hill D, Larock RC. Palladium- and copper-catalyzed solution phase synthesis of a diverse library of isoquinolines. J Comb Chem 2009; 11:1061-5. [PMID: 19728736 PMCID: PMC2783704 DOI: 10.1021/cc9000949] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The solution-phase synthesis of a 111 member isoquinoline library is described. The isoquinoline scaffold has been accessed through the palladium- and copper-catalyzed cyclization of iminoalkynes and the palladium-catalyzed iminoannulation of internal alkynes, followed by diversification of hydroxyl functionality where it is present.
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Affiliation(s)
- Sudipta Roy
- Department of Chemistry, Iowa State University, Ames, Iowa 50011
| | - Sujata Roy
- Department of Chemistry, Iowa State University, Ames, Iowa 50011
| | - Benjamin Neuenswander
- The University of Kansas NIH Center of Excellence in Chemical Methodologies and Library Development, Lawrence, Kansas, 66047
| | - David Hill
- The University of Kansas NIH Center of Excellence in Chemical Methodologies and Library Development, Lawrence, Kansas, 66047
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27
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Worlikar SA, Neuenswander B, Lushington GH, Larock RC. Highly substituted indole library synthesis by palladium-catalyzed coupling reactions in solution and on a solid support. J Comb Chem 2009; 11:875-9. [PMID: 19746991 PMCID: PMC2760449 DOI: 10.1021/cc900057n] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
3-Iodoindoles have been synthesized by the iodocyclization of N,N-dialkyl-o-(1-alkynyl)anilines, obtained by the Pd/Cu catalyzed coupling of terminal acetylenes with N,N-dialkyl-o-iodoanilines. These 3-iodoindoles undergo palladium-catalyzed Sonogashira and Suzuki coupling reactions to yield 1,2,3-trisubstituted indoles. These reactions have been applied to parallel library synthesis utilizing commercially available terminal acetylenes and boronic acids. The aforementioned chemistry has also been carried out on a chlorinated Wang resin as a solid support, affording 1,2,3,5-tetrasubstituted indoles after cleavage from the support. A diverse 42-member library of highly substituted indoles has been synthesized.
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Affiliation(s)
| | - Benjamin Neuenswander
- University of Kansas NIH Center of Excellence in Chemical Methodologies and Library Development, Lawrence, Kansas 66047
| | - Gerald H. Lushington
- University of Kansas NIH Center of Excellence in Chemical Methodologies and Library Development, Lawrence, Kansas 66047
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28
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Abstract
The solution-phase parallel synthesis of a 121-member library of multi-substituted benzo[ b]furans is described. 2,3,5-Trisubstituted benzo[ b]furans have been prepared by the palladium-catalyzed substitution of 3-iodobenzofurans by Suzuki-Miyaura, carbonylative Suzuki, Sonogashira, Heck, and carboalkoxylation chemistry. The 3-iodobenzofurans are readily prepared in good to excellent yields by the palladium/copper-catalyzed cross-coupling of various o-iodoanisoles and terminal alkynes, followed by electrophilic cyclization with ICl.
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Affiliation(s)
- Chul-Hee Cho
- Department of Chemistry, Iowa State University, Ames, Iowa 50011, USA
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29
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Ribelin T, Katz CE, English DG, Smith S, Manukyan AK, Day VW, Neuenswander B, Poutsma JL, Aubé J. Highly stereoselective ring expansion reactions mediated by attractive cation-n interactions. Angew Chem Int Ed Engl 2008; 47:6233-5. [PMID: 18613179 DOI: 10.1002/anie.200801591] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Timothy Ribelin
- Department of Medicinal Chemistry, University of Kansas, 1251 Wescoe Hall Drive, Malott Hall, Room 4070, Lawrence, KS 66047, USA
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Frankowski KJ, Neuenswander B, Aubé J. Explorations of stemona alkaloid-inspired analogues: skeletal modification and functional group diversification. ACTA ACUST UNITED AC 2008; 10:721-5. [PMID: 18698827 DOI: 10.1021/cc800078h] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A tandem Diels-Alder/Schmidt reaction provided an efficient route for the exploration of unnatural Stemona alkaloid analogues. Thus, a series of tricyclic scaffolds were efficiently prepared and then elaborated into seven sets of functionalized analogues. These derivatives incorporated appended heterocycles, such as indoles and quinolines, or other diversity-incorporating moieties such as carbamates and amines. Both the scaffold-generation sequence and the diversification steps could be manipulated to provide regio- and diastereochemically pure products.
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Affiliation(s)
- Kevin J Frankowski
- Department of Medicinal Chemistry and Center for Chemical Methodologies and Library Development, University of Kansas, Malott Hall, 1251 Wescoe Hall Drive, Lawrence, Kansas 66045-7582, USA
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31
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Ribelin T, Katz C, English D, Smith S, Manukyan A, Day V, Neuenswander B, Poutsma J, Aubé J. Highly Stereoselective Ring Expansion Reactions Mediated by Attractive Cation-n Interactions. Angew Chem Int Ed Engl 2008. [DOI: 10.1002/ange.200801591] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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32
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Waldo JP, Mehta S, Neuenswander B, Lushington GH, Larock RC. Solution phase synthesis of a diverse library of highly substituted isoxazoles. ACTA ACUST UNITED AC 2008; 10:658-63. [PMID: 18671435 DOI: 10.1021/cc800055x] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
The iodocyclization of O-methyloximes of 2-alkyn-1-ones affords 4-iodoisoxazoles, which undergo various palladium-catalyzed reactions to yield 3,4,5-trisubstituted isoxazoles. The palladium-catalyzed processes have been adapted to parallel synthesis utilizing commercially available boronic acid, acetylene, styrene, and amine sublibraries. Accordingly, a diverse 51-member library of 3,4,5-trisubstituted isoxazoles has been generated.
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Affiliation(s)
- Jesse P Waldo
- Department of Chemistry, Iowa State University, Ames, Iowa 50011, USA
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Nöth J, Frankowski KJ, Neuenswander B, Aubé J, Reiser O. Efficient synthesis of gamma-lactams by a tandem reductive amination/lactamization sequence. J Comb Chem 2008; 10:456-9. [PMID: 18338857 PMCID: PMC2713763 DOI: 10.1021/cc700202c] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A three-component method for the synthesis of highly substituted gamma-lactams from readily available maleimides, aldehydes, and amines is described. A new reductive amination/intramolecular lactamization sequence provides a straightforward route to the lactam products in a single manipulation. The general utility of this method is demonstrated by the parallel synthesis of a gamma-lactam library.
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Affiliation(s)
- Julica Nöth
- Institut für Organische Chemie, Universität Regensburg, Universitätsstrasse 31, 93053 Regensburg, Germany
- Center for Chemical Methodology and Library Development, 1501 Wakarusa Drive, Lawrence, Kansas 66047
| | - Kevin J. Frankowski
- Center for Chemical Methodology and Library Development, 1501 Wakarusa Drive, Lawrence, Kansas 66047
| | - Benjamin Neuenswander
- Center for Chemical Methodology and Library Development, 1501 Wakarusa Drive, Lawrence, Kansas 66047
| | - Jeffrey Aubé
- Center for Chemical Methodology and Library Development, 1501 Wakarusa Drive, Lawrence, Kansas 66047
| | - Oliver Reiser
- Institut für Organische Chemie, Universität Regensburg, Universitätsstrasse 31, 93053 Regensburg, Germany
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34
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Zhang L, Lushington GH, Neuenswander B, Hershberger JC, Malinakova HC. Solution-Phase Parallel Synthesis of Hexahydro-1H-isoindolone Libraries via Tactical Combination of Cu-Catalyzed Three-Component Coupling and Diels–Alder Reactions. ACTA ACUST UNITED AC 2008; 10:285-302. [DOI: 10.1021/cc700151m] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Lei Zhang
- Department of Chemistry, University of Kansas, 1251 Wescoe Hall Drive, Lawrence, Kansas 66045, and the Center for Methodology and Library Development at the University of Kansas, 1501 Wakarusa Drive, Lawrence, Kansas 66047
| | - Gerald H. Lushington
- Department of Chemistry, University of Kansas, 1251 Wescoe Hall Drive, Lawrence, Kansas 66045, and the Center for Methodology and Library Development at the University of Kansas, 1501 Wakarusa Drive, Lawrence, Kansas 66047
| | - Benjamin Neuenswander
- Department of Chemistry, University of Kansas, 1251 Wescoe Hall Drive, Lawrence, Kansas 66045, and the Center for Methodology and Library Development at the University of Kansas, 1501 Wakarusa Drive, Lawrence, Kansas 66047
| | - John C. Hershberger
- Department of Chemistry, University of Kansas, 1251 Wescoe Hall Drive, Lawrence, Kansas 66045, and the Center for Methodology and Library Development at the University of Kansas, 1501 Wakarusa Drive, Lawrence, Kansas 66047
| | - Helena C. Malinakova
- Department of Chemistry, University of Kansas, 1251 Wescoe Hall Drive, Lawrence, Kansas 66045, and the Center for Methodology and Library Development at the University of Kansas, 1501 Wakarusa Drive, Lawrence, Kansas 66047
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35
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Vedantham P, Guerra JM, Schoenen F, Huang M, Gor PJ, Georg GI, Wang JL, Neuenswander B, Lushington GH, Mitscher LA, Ye QZ, Hanson PR. Ionic immobilization, diversification, and release: application to the generation of a library of methionine aminopeptidase inhibitors. ACTA ACUST UNITED AC 2007; 10:185-94. [PMID: 18163595 DOI: 10.1021/cc700085c] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Development of an ionic immobilization, diversification, and release method for the generation of methionine aminopeptidase inhibitors is reported. This method involves the immobilization of 5-bromofuran-2-carboxylic acid and 5-bromothiophene-2-carboxylic acid onto PS-BEMP, followed by Suzuki reaction on a resin-bound intermediate and subsequent release to provide products in moderate yields and excellent purities. Compound potencies were evaluated on the Co(II), Mn(II), Ni(II), and Fe(II) forms of Escherichia coli MetAP1. The furoic-acid analogs were found to be Mn(II) selective with IC 50 values in the low micromolar range. Qualitative SAR analysis, supplemented by molecular modeling studies, provides valuable information on structural elements responsible for potency and selectivity.
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Affiliation(s)
- Punitha Vedantham
- Department of Chemistry, University of Kansas, 1251 Wescoe Hall Drive, Lawrence, Kansas 66045, USA
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36
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Abstract
The reactions of 1,2- and 1,3-hydroxyalkyl azides and aldehydes in the presence of Lewis acid result in the one-step construction of oxazolines and dihydrooxazines, respectively. The reaction was adapted to parallel synthesis using a polymer-bound phosphine to scavenge excess hydroxyalkyl azide. Thus, a 60-member library of various disubstituted oxazolines and di- and trisubstituted dihydrooxazines was generated.
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Affiliation(s)
- Priyanka Chaudhry
- Department of Medicinal Chemistry, University of Kansas, 1251 Wescoe Hall Drive, Lawrence, Kansas 66045, USA
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37
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Manyem S, Sibi MP, Lushington GH, Neuenswander B, Schoenen F, Aubé J. Solution-phase parallel synthesis of a library of delta(2)-pyrazolines. J Comb Chem 2007; 9:20-8. [PMID: 17206829 PMCID: PMC2562233 DOI: 10.1021/cc0601175] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A parallel synthesis of a library (80 members) of 2-pyrazolines in solution phase is described. The 2-pyrazoline core was accessed through the [3 + 2] cycloaddition of nitrilimines with enoyl oxazolidinones. The cycloaddition provided two regioisomers, the major product being the C regioisomer. The oxazolidinone moiety was further reduced to the primary alcohol, producing another library of 5-hydroxymethyl-2-pyrazolines. The Lipinski profiles and calculated ADME properties of the compounds are also reported.
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Affiliation(s)
- Shankar Manyem
- University of Kansas Center of Excellence in Chemical Methodology and Library Development (KU-CMLD), Lawrence, Kansas 66047
| | - Mukund P. Sibi
- Department of Chemistry and Molecular Biology, North Dakota State University, Fargo, North Dakota 58105
| | - Gerald H. Lushington
- University of Kansas Center of Excellence in Chemical Methodology and Library Development (KU-CMLD), Lawrence, Kansas 66047
| | - Benjamin Neuenswander
- University of Kansas Center of Excellence in Chemical Methodology and Library Development (KU-CMLD), Lawrence, Kansas 66047
| | - Frank Schoenen
- University of Kansas Center of Excellence in Chemical Methodology and Library Development (KU-CMLD), Lawrence, Kansas 66047
| | - Jeffrey Aubé
- University of Kansas Center of Excellence in Chemical Methodology and Library Development (KU-CMLD), Lawrence, Kansas 66047
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