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Song K, Minami JK, Huang A, Dehkordi SR, Lomeli SH, Luebeck J, Goodman MH, Moriceau G, Krijgsman O, Dharanipragada P, Ridgley T, Crosson WP, Salazar J, Pazol E, Karin G, Jayaraman R, Balanis NG, Alhani S, Sheu K, Hoeve JT, Palermo A, Motika SE, Senaratne TN, Paraiso KH, Hergenrother PJ, Rao PN, Multani AS, Peeper DS, Bafna V, Lo RS, Graeber TG. Plasticity of Extrachromosomal and Intrachromosomal BRAF Amplifications in Overcoming Targeted Therapy Dosage Challenges. Cancer Discov 2022; 12:1046-1069. [PMID: 34930786 PMCID: PMC9192483 DOI: 10.1158/2159-8290.cd-20-0936] [Citation(s) in RCA: 26] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2020] [Revised: 11/06/2021] [Accepted: 12/15/2021] [Indexed: 11/16/2022]
Abstract
Focal amplifications (FA) can mediate targeted therapy resistance in cancer. Understanding the structure and dynamics of FAs is critical for designing treatments that overcome plasticity-mediated resistance. We developed a melanoma model of dual MAPK inhibitor (MAPKi) resistance that bears BRAFV600 amplifications through either extrachromosomal DNA (ecDNA)/double minutes (DM) or intrachromosomal homogenously staining regions (HSR). Cells harboring BRAFV600E FAs displayed mode switching between DMs and HSRs, from both de novo genetic changes and selection of preexisting subpopulations. Plasticity is not exclusive to ecDNAs, as cells harboring HSRs exhibit drug addiction-driven structural loss of BRAF amplicons upon dose reduction. FA mechanisms can couple with kinase domain duplications and alternative splicing to enhance resistance. Drug-responsive amplicon plasticity is observed in the clinic and can involve other MAPK pathway genes, such as RAF1 and NRAS. BRAF FA-mediated dual MAPKi-resistant cells are more sensitive to proferroptotic drugs, extending the spectrum of ferroptosis sensitivity in MAPKi resistance beyond cases of dedifferentiation. SIGNIFICANCE Understanding the structure and dynamics of oncogene amplifications is critical for overcoming tumor relapse. BRAF amplifications are highly plastic under MAPKi dosage challenges in melanoma, through involvement of de novo genomic alterations, even in the HSR mode. Moreover, BRAF FA-driven, dual MAPKi-resistant cells extend the spectrum of resistance-linked ferroptosis sensitivity. This article is highlighted in the In This Issue feature, p. 873.
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Affiliation(s)
- Kai Song
- Department of Bioengineering, UCLA, Los Angeles, CA 90095, USA
| | - Jenna K. Minami
- Department of Molecular and Medical Pharmacology, David Geffen School of Medicine, UCLA, Los Angeles, CA 90095, USA
- Department of Integrative Biology and Physiology, David Geffen School of Medicine, UCLA, Los Angeles, CA 90095, USA
| | - Arthur Huang
- Department of Molecular and Medical Pharmacology, David Geffen School of Medicine, UCLA, Los Angeles, CA 90095, USA
| | - Siavash R. Dehkordi
- Department of Computer Science and Engineering, University of California at San Diego, La Jolla, CA 92093, USA
| | - Shirley H. Lomeli
- Division of Dermatology, Department of Medicine, David Geffen School of Medicine, UCLA, Los Angeles, CA 90095, USA
| | - Jens Luebeck
- Department of Computer Science and Engineering, University of California at San Diego, La Jolla, CA 92093, USA
| | - Mark H. Goodman
- Department of Molecular and Medical Pharmacology, David Geffen School of Medicine, UCLA, Los Angeles, CA 90095, USA
| | - Gatien Moriceau
- Division of Dermatology, Department of Medicine, David Geffen School of Medicine, UCLA, Los Angeles, CA 90095, USA
| | - Oscar Krijgsman
- Division of Molecular Oncology, The Netherlands Cancer Institute, Plesmanlaan 121, 1066 CX Amsterdam, the Netherlands
| | - Prashanthi Dharanipragada
- Division of Dermatology, Department of Medicine, David Geffen School of Medicine, UCLA, Los Angeles, CA 90095, USA
| | - Trevor Ridgley
- Bioinformatics Interdepartmental Program, UCLA, Los Angeles, CA, 90095, USA
| | - William P. Crosson
- Department of Molecular and Medical Pharmacology, David Geffen School of Medicine, UCLA, Los Angeles, CA 90095, USA
| | - Jesus Salazar
- Department of Molecular and Medical Pharmacology, David Geffen School of Medicine, UCLA, Los Angeles, CA 90095, USA
| | - Eli Pazol
- Department of Molecular and Medical Pharmacology, David Geffen School of Medicine, UCLA, Los Angeles, CA 90095, USA
| | - Gabriel Karin
- Department of Molecular and Medical Pharmacology, David Geffen School of Medicine, UCLA, Los Angeles, CA 90095, USA
| | - Rachana Jayaraman
- Department of Molecular and Medical Pharmacology, David Geffen School of Medicine, UCLA, Los Angeles, CA 90095, USA
| | - Nikolas G. Balanis
- Department of Molecular and Medical Pharmacology, David Geffen School of Medicine, UCLA, Los Angeles, CA 90095, USA
| | - Salwan Alhani
- Department of Molecular and Medical Pharmacology, David Geffen School of Medicine, UCLA, Los Angeles, CA 90095, USA
| | - Kyle Sheu
- Department of Molecular and Medical Pharmacology, David Geffen School of Medicine, UCLA, Los Angeles, CA 90095, USA
| | - Johanna ten Hoeve
- Department of Molecular and Medical Pharmacology, David Geffen School of Medicine, UCLA, Los Angeles, CA 90095, USA
- UCLA Metabolomics Center, Los Angeles, CA, 90095, USA
| | - Amelia Palermo
- Department of Molecular and Medical Pharmacology, David Geffen School of Medicine, UCLA, Los Angeles, CA 90095, USA
- UCLA Metabolomics Center, Los Angeles, CA, 90095, USA
| | - Stephen E. Motika
- Department of Chemistry, Institute for Genomic Biology, Cancer Center at Illinois, University of Illinois, Urbana-Champaign, USA
| | - T. Niroshi Senaratne
- Department of Pathology and Laboratory Medicine, David Geffen School of Medicine, UCLA, Los Angeles, CA 90095, USA
| | - Kim H. Paraiso
- Department of Molecular and Medical Pharmacology, David Geffen School of Medicine, UCLA, Los Angeles, CA 90095, USA
| | - Paul J. Hergenrother
- Department of Chemistry, Institute for Genomic Biology, Cancer Center at Illinois, University of Illinois, Urbana-Champaign, USA
| | - P. Nagesh Rao
- Department of Pathology and Laboratory Medicine, David Geffen School of Medicine, UCLA, Los Angeles, CA 90095, USA
| | - Asha S. Multani
- Department of Genetics, The University of Texas M. D. Anderson Cancer Center, Houston, TX 77030
| | - Daniel S. Peeper
- Division of Molecular Oncology, The Netherlands Cancer Institute, Plesmanlaan 121, 1066 CX Amsterdam, the Netherlands
| | - Vineet Bafna
- Department of Computer Science and Engineering, University of California at San Diego, La Jolla, CA 92093, USA
| | - Roger S. Lo
- Department of Molecular and Medical Pharmacology, David Geffen School of Medicine, UCLA, Los Angeles, CA 90095, USA
- Division of Dermatology, Department of Medicine, David Geffen School of Medicine, UCLA, Los Angeles, CA 90095, USA
- Jonsson Comprehensive Cancer Center, UCLA, Los Angeles, CA 90095, USA
| | - Thomas G. Graeber
- Department of Molecular and Medical Pharmacology, David Geffen School of Medicine, UCLA, Los Angeles, CA 90095, USA
- Jonsson Comprehensive Cancer Center, UCLA, Los Angeles, CA 90095, USA
- Crump Institute for Molecular Imaging, UCLA, Los Angeles, CA 90095, USA
- California NanoSystems Institute, UCLA, Los Angeles, CA 90095, USA
- Eli and Edythe Broad Center of Regenerative Medicine and Stem Cell Research, UCLA, Los Angeles, CA 90095, USA
- UCLA Metabolomics Center, Los Angeles, CA, 90095, USA
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Perlmutter SJ, Geddes EJ, Drown BS, Motika SE, Lee MR, Hergenrother PJ. Compound Uptake into E. coli Can Be Facilitated by N-Alkyl Guanidiniums and Pyridiniums. ACS Infect Dis 2021; 7:162-173. [PMID: 33228356 PMCID: PMC7796962 DOI: 10.1021/acsinfecdis.0c00715] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Multidrug-resistant Gram-negative bacterial infections are on the rise, and with no FDA approvals for new classes of broad-spectrum antibiotics in over 50 years, these infections constitute a major threat to human health. A significant challenge is the inability of most compounds to accumulate in Gram-negative bacteria. Recently developed predictive guidelines show that appending a primary amine to an appropriately shaped compound can enhance Gram-negative accumulation. Here, we report that other positively charged nitrogen functional groups, namely, N-alkyl guanidiniums and pyridiniums, can also facilitate compound uptake into Gram-negative bacteria. The accumulation of a set of 60 nonantibiotic compounds, consisting of 20 primary amines and their corresponding guanidiniums and pyridiniums, was assessed in Escherichia coli. We also installed these alternate functional groups onto antibiotic scaffolds and assessed their accumulation and antibacterial activity in Gram-negative bacteria. The results suggest that other positively-charged, nitrogen-containing functional groups should be considered when designing antibiotics with Gram-negative activity.
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Affiliation(s)
- Sarah J Perlmutter
- Roger Adams Laboratory, Department of Chemistry, University of Illinois, Urbana, Illinois 61801, United States
- Carl R. Woese Institute for Genomic Biology, University of Illinois, Urbana, Illinois 61801, United States
| | - Emily J Geddes
- Roger Adams Laboratory, Department of Chemistry, University of Illinois, Urbana, Illinois 61801, United States
- Carl R. Woese Institute for Genomic Biology, University of Illinois, Urbana, Illinois 61801, United States
| | - Bryon S Drown
- Roger Adams Laboratory, Department of Chemistry, University of Illinois, Urbana, Illinois 61801, United States
- Carl R. Woese Institute for Genomic Biology, University of Illinois, Urbana, Illinois 61801, United States
| | - Stephen E Motika
- Roger Adams Laboratory, Department of Chemistry, University of Illinois, Urbana, Illinois 61801, United States
- Carl R. Woese Institute for Genomic Biology, University of Illinois, Urbana, Illinois 61801, United States
| | - Myung Ryul Lee
- Roger Adams Laboratory, Department of Chemistry, University of Illinois, Urbana, Illinois 61801, United States
- Carl R. Woese Institute for Genomic Biology, University of Illinois, Urbana, Illinois 61801, United States
| | - Paul J Hergenrother
- Roger Adams Laboratory, Department of Chemistry, University of Illinois, Urbana, Illinois 61801, United States
- Carl R. Woese Institute for Genomic Biology, University of Illinois, Urbana, Illinois 61801, United States
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Abstract
Covering: up to 2020 Natural products have a long history in drug discovery, with their inherent biological activity often tailored by medicinal chemists to arrive at the final drug product. This process is illustrated by numerous examples, including the conversion of epothilone to ixabepilone, erythromycin to azithromycin, and lovastatin to simvastatin. However, natural products are also fruitful starting points for the creation of complex and diverse compounds, especially those that are markedly different from the parent natural product and accordingly do not retain the biological activity of the parent. The resulting products have physiochemical properties that differ considerably when compared to traditional screening collections, thus affording an opportunity to discover novel biological activity. The synthesis of new structural frameworks from natural products thus yields value-added compounds, as demonstrated in the last several years with multiple biological discoveries emerging from these collections. This Highlight details a handful of these studies, describing new compounds derived from natural products that have biological activity and cellular targets different from those evoked/engaged by the parent. Such re-engineering of natural products offers the potential for discovering compounds with interesting and unexpected biological activity.
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Affiliation(s)
- Stephen E Motika
- Department of Chemistry, Institute for Genomic Biology, Cancer Center at Illinois, University of Illinois, Urbana-Champaign, USA.
| | - Paul J Hergenrother
- Department of Chemistry, Institute for Genomic Biology, Cancer Center at Illinois, University of Illinois, Urbana-Champaign, USA.
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Motika SE, Ulrich RJ, Geddes EJ, Lee HY, Lau GW, Hergenrother PJ. Gram-Negative Antibiotic Active Through Inhibition of an Essential Riboswitch. J Am Chem Soc 2020; 142:10856-10862. [PMID: 32432858 DOI: 10.1021/jacs.0c04427] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Multidrug-resistant Gram-negative (GN) infections for which there are few available treatment options are increasingly common. The development of new antibiotics for these pathogens is challenging because of the inability of most small molecules to accumulate inside GN bacteria. Using recently developed predictive guidelines for compound accumulation in Escherichia coli, we have converted the antibiotic Ribocil C, which targets the flavin mononucleotide (FMN) riboswitch, from a compound lacking whole-cell activity against wild-type GN pathogens into a compound that accumulates to a high level in E. coli, is effective against Gram-negative clinical isolates, and has efficacy in mouse models of GN infections. This compound allows for the first assessment of the translational potential of FMN riboswitch binders against wild-type Gram-negative bacteria.
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Affiliation(s)
| | | | | | | | - Gee W Lau
- Department of Pathobiology, University of Illinois, Urbana, Illinois 61802, United States
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5
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Llabani E, Hicklin RW, Lee HY, Motika SE, Crawford LA, Weerapana E, Hergenrother PJ. Diverse compounds from pleuromutilin lead to a thioredoxin inhibitor and inducer of ferroptosis. Nat Chem 2019; 11:521-532. [PMID: 31086302 PMCID: PMC6639018 DOI: 10.1038/s41557-019-0261-6] [Citation(s) in RCA: 141] [Impact Index Per Article: 28.2] [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: 07/02/2018] [Accepted: 03/25/2019] [Indexed: 02/08/2023]
Abstract
The chemical diversification of natural products provides a robust and general method for the creation of stereochemically rich and structurally diverse small molecules. The resulting compounds have physicochemical traits different from those in most screening collections, and as such are an excellent source for biological discovery. Herein, we subject the diterpene natural product pleuromutilin to reaction sequences focused on creating ring system diversity in few synthetic steps. This effort resulted in a collection of compounds with previously unreported ring systems, providing a novel set of structurally diverse and highly complex compounds suitable for screening in a variety of different settings. Biological evaluation identified the novel compound ferroptocide, a small molecule that rapidly and robustly induces ferroptotic death of cancer cells. Target identification efforts and CRISPR knockout studies reveal that ferroptocide is an inhibitor of thioredoxin, a key component of the antioxidant system in the cell. Ferroptocide positively modulates the immune system in a murine model of breast cancer and will be a useful tool to study the utility of pro-ferroptotic agents for treatment of cancer.
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Affiliation(s)
- Evijola Llabani
- Department of Chemistry, Roger Adams Laboratory, University of Illinois, Urbana, IL, USA
| | - Robert W Hicklin
- Department of Chemistry, Roger Adams Laboratory, University of Illinois, Urbana, IL, USA
| | - Hyang Yeon Lee
- Department of Chemistry, Roger Adams Laboratory, University of Illinois, Urbana, IL, USA
| | - Stephen E Motika
- Department of Chemistry, Roger Adams Laboratory, University of Illinois, Urbana, IL, USA
| | - Lisa A Crawford
- Department of Chemistry, Boston College, Chestnut Hill, MA, USA
| | | | - Paul J Hergenrother
- Department of Chemistry, Roger Adams Laboratory, University of Illinois, Urbana, IL, USA.
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6
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Abstract
The chemical diversification of natural products provides a robust and general method for the creation of stereochemically rich and structurally diverse small molecules. The resulting compounds have physicochemical traits different from those in most screening collections, and as such are an excellent source for biological discovery. Herein, we subject the diterpene natural product pleuromutilin to reaction sequences focused on creating ring system diversity in few synthetic steps. This effort resulted in a collection of compounds with previously unreported ring systems, providing a novel set of structurally diverse and highly complex compounds suitable for screening in a variety of different settings. Biological evaluation identified the novel compound ferroptocide, a small molecule that rapidly and robustly induces ferroptotic death of cancer cells. Target identification efforts and CRISPR knockout studies reveal that ferroptocide is an inhibitor of thioredoxin, a key component of the antioxidant system in the cell. Ferroptocide positively modulates the immune system in a murine model of breast cancer and will be a useful tool to study the utility of pro-ferroptotic agents for treatment of cancer.
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Affiliation(s)
- Evijola Llabani
- Department of Chemistry, Roger Adams Laboratory, University of Illinois, Urbana, IL, USA
| | - Robert W Hicklin
- Department of Chemistry, Roger Adams Laboratory, University of Illinois, Urbana, IL, USA
| | - Hyang Yeon Lee
- Department of Chemistry, Roger Adams Laboratory, University of Illinois, Urbana, IL, USA
| | - Stephen E Motika
- Department of Chemistry, Roger Adams Laboratory, University of Illinois, Urbana, IL, USA
| | - Lisa A Crawford
- Department of Chemistry, Boston College, Chestnut Hill, MA, USA
| | | | - Paul J Hergenrother
- Department of Chemistry, Roger Adams Laboratory, University of Illinois, Urbana, IL, USA.
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7
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Motika SE, Shi X. Synthesis and application of a novel bis-1,2,3-triazole ligand containing a 2,2'-bipyrrolidine core. ARKIVOC 2018; 2018:280-287. [DOI: 10.24820/ark.5550190.p010.320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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8
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Dong B, Peng H, Motika SE, Shi X. Gold Redox Catalysis through Base-Initiated Diazonium Decomposition toward Alkene, Alkyne, and Allene Activation. Chemistry 2017; 23:11093-11099. [PMID: 28603854 PMCID: PMC5671776 DOI: 10.1002/chem.201701970] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2017] [Indexed: 12/28/2022]
Abstract
The discovery of photoassisted diazonium activation toward gold(I) oxidation greatly extended the scope of gold redox catalysis by avoiding the use of a strong oxidant. Some practical issues that limit the application of this new type of chemistry are the relative low efficiency (long reaction time and low conversion) and the strict reaction condition control that is necessary (degassing and inert reaction environment). Herein, an alternative photofree condition has been developed through Lewis base induced diazonium activation. With this method, an unreactive AuI catalyst was used in combination with Na2 CO3 and diazonium salts to produce a AuIII intermediate. The efficient activation of various substrates, including alkyne, alkene and allene was achieved, followed by rapid AuIII reductive elimination, which yielded the C-C coupling products with good to excellent yields. Relative to the previously reported photoactivation method, our approach offered greater efficiency and versatility through faster reaction rates and broader reaction scope. Challenging substrates such as electron rich/neutral allenes, which could not be activated under the photoinitiation conditions (<5 % yield), could be activated to subsequently yield the desired coupling products in good to excellent yield.
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Affiliation(s)
- Boliang Dong
- Department of Chemistry, University of South Florida, Tampa, FL, 33620, USA
| | - Haihui Peng
- Department of Chemistry, University of South Florida, Tampa, FL, 33620, USA
| | - Stephen E Motika
- Department of Chemistry, University of South Florida, Tampa, FL, 33620, USA
| | - Xiaodong Shi
- Department of Chemistry, University of South Florida, Tampa, FL, 33620, USA
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9
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Smith CA, Motika SE, Wojtas L, Shi X. Accessing alternative reaction pathways of the intermolecular condensation between homo-propargyl alcohols and terminal alkynes through divergent gold catalysis. Chem Commun (Camb) 2017; 53:2315-2318. [PMID: 28074975 PMCID: PMC5313346 DOI: 10.1039/c6cc09794d] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
An intermolecular condensation of alkynols and terminal alkynes is reported. Using IPrAuNTf2, an efficient Au-catalyzed cyclization-alkynylation strategy furnishes (2-arylalkynyl) cyclic ethers in moderate to excellent yields (up to 94%). This strategy is extended to the synthesis of functionalized 2,3-dihydrooxepines via the sequential Au-catalyzed ring expansion of the cyclic ether substrates.
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Affiliation(s)
- Courtney A Smith
- Department of Chemistry, University of South Florida, Tampa, FL 33620, USA.
| | - Stephen E Motika
- Department of Chemistry, University of South Florida, Tampa, FL 33620, USA.
| | - Lukasz Wojtas
- Department of Chemistry, University of South Florida, Tampa, FL 33620, USA.
| | - Xiaodong Shi
- Department of Chemistry, University of South Florida, Tampa, FL 33620, USA.
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Motika SE, Wang Q, Akhmedov NG, Wojtas L, Shi X. Regioselective Amine–Borane Cyclization: Towards the Synthesis of 1,2‐BN‐3‐Cyclohexene by Copper‐Assisted Triazole/Gold Catalysis. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201604986] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Stephen E. Motika
- Department of Chemistry University of South Florida Tampa FL 33620 USA
| | - Qiaoyi Wang
- Department of Chemistry West Virginia University Morgantown WV 26505 USA
| | - Novruz G. Akhmedov
- Department of Chemistry West Virginia University Morgantown WV 26505 USA
| | - Lukasz Wojtas
- Department of Chemistry University of South Florida Tampa FL 33620 USA
| | - Xiaodong Shi
- Department of Chemistry University of South Florida Tampa FL 33620 USA
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Motika SE, Wang Q, Akhmedov NG, Wojtas L, Shi X. Regioselective Amine–Borane Cyclization: Towards the Synthesis of 1,2‐BN‐3‐Cyclohexene by Copper‐Assisted Triazole/Gold Catalysis. Angew Chem Int Ed Engl 2016; 55:11582-6. [DOI: 10.1002/anie.201604986] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2016] [Indexed: 01/19/2023]
Affiliation(s)
- Stephen E. Motika
- Department of Chemistry University of South Florida Tampa FL 33620 USA
| | - Qiaoyi Wang
- Department of Chemistry West Virginia University Morgantown WV 26505 USA
| | - Novruz G. Akhmedov
- Department of Chemistry West Virginia University Morgantown WV 26505 USA
| | - Lukasz Wojtas
- Department of Chemistry University of South Florida Tampa FL 33620 USA
| | - Xiaodong Shi
- Department of Chemistry University of South Florida Tampa FL 33620 USA
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12
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Affiliation(s)
- Stephen E. Motika
- C. Eugene Bennett Department
of Chemistry, West Virginia University, Morgantown, West Virginia 26506, United States
| | - Qiaoyi Wang
- C. Eugene Bennett Department
of Chemistry, West Virginia University, Morgantown, West Virginia 26506, United States
| | - Xiaohan Ye
- C. Eugene Bennett Department
of Chemistry, West Virginia University, Morgantown, West Virginia 26506, United States
| | - Xiaodong Shi
- C. Eugene Bennett Department
of Chemistry, West Virginia University, Morgantown, West Virginia 26506, United States
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Wang Q, Motika SE, Akhmedov NG, Petersen JL, Shi X. Synthesis of Cyclic Amine Boranes through Triazole-Gold(I)-Catalyzed Alkyne Hydroboration. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201402614] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [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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14
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Wang Q, Motika SE, Akhmedov NG, Petersen JL, Shi X. Synthesis of Cyclic Amine Boranes through Triazole-Gold(I)-Catalyzed Alkyne Hydroboration. Angew Chem Int Ed Engl 2014; 53:5418-22. [DOI: 10.1002/anie.201402614] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2014] [Indexed: 11/09/2022]
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Affiliation(s)
- James A. MacKay
- Department of Chemistry and Biochemistry, Elizabethtown College, 1 Alpha Drive, Elizabethtown, Pennsylvania
17022, United States
| | - Zachary C. Landis
- Department of Chemistry and Biochemistry, Elizabethtown College, 1 Alpha Drive, Elizabethtown, Pennsylvania
17022, United States
| | - Stephen E. Motika
- Department of Chemistry and Biochemistry, Elizabethtown College, 1 Alpha Drive, Elizabethtown, Pennsylvania
17022, United States
| | - Margaret H. Kench
- Department of Chemistry and Biochemistry, Elizabethtown College, 1 Alpha Drive, Elizabethtown, Pennsylvania
17022, United States
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