1
|
Wang G, Tan Y, Zou H, Sui X, Wang Z, Satz AL, Kuai L, Su W, Zhang Q. DNA-Compatible Cyclization Reaction to Access 1,3,4-Oxadiazoles and 1,2,4-Triazoles. Org Lett 2024; 26:1353-1357. [PMID: 38335275 DOI: 10.1021/acs.orglett.3c04240] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/12/2024]
Abstract
DNA-encoded chemical library (DECL) technology is a commonly employed screening platform in both the pharmaceutical industry and academia. To expand the chemical space of DECLs, new and robust DNA-compatible reactions are sought after. In particular, DNA-compatible cyclization reactions are highly valued, as these reactions tend to be atom economical and thus may provide lead- and drug-like molecules. Herein, we report two new methodologies employing DNA-conjugated thiosemicarbazides as a common precursor, yielding highly substituted 1,3,4-oxadiazoles and 1,2,4-triazoles. These two novel DNA-compatible reactions feature a high conversion efficiency and broad substrate scope under mild conditions that do not observably degrade DNA.
Collapse
Affiliation(s)
- Gaonan Wang
- WuXi AppTec, 288 Fute Zhong Road, Waigaoqiao Free Trade Zone, Shanghai 200131, China
| | - Yu Tan
- WuXi AppTec, 288 Fute Zhong Road, Waigaoqiao Free Trade Zone, Shanghai 200131, China
| | - Hanzhi Zou
- WuXi AppTec, 288 Fute Zhong Road, Waigaoqiao Free Trade Zone, Shanghai 200131, China
| | - Xihang Sui
- WuXi AppTec, 288 Fute Zhong Road, Waigaoqiao Free Trade Zone, Shanghai 200131, China
| | - Zhanlong Wang
- WuXi AppTec, 288 Fute Zhong Road, Waigaoqiao Free Trade Zone, Shanghai 200131, China
| | | | - Letian Kuai
- WuXi AppTec, 55 Cambridge Parkway, 8th Floor, Cambridge, Massachusetts 02142, United States
| | - Wenji Su
- WuXi AppTec, 288 Fute Zhong Road, Waigaoqiao Free Trade Zone, Shanghai 200131, China
| | - Qi Zhang
- WuXi AppTec, 288 Fute Zhong Road, Waigaoqiao Free Trade Zone, Shanghai 200131, China
| |
Collapse
|
2
|
Merrifield JL, Pimentel EB, Peters-Clarke TM, Nesbitt DJ, Coon JJ, Martell JD. DNA-Compatible Copper/TEMPO Oxidation for DNA-Encoded Libraries. Bioconjug Chem 2023; 34:1380-1386. [PMID: 37540561 PMCID: PMC10831869 DOI: 10.1021/acs.bioconjchem.3c00254] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/06/2023]
Abstract
Aldehydes are important synthons for DNA-encoded library (DEL) construction, but the development of a DNA-compatible method for the oxidation of alcohols to aldehydes remains a significant challenge in the field of DEL chemistry. We report that a copper/TEMPO catalyst system enables the solution-phase DNA-compatible oxidation of DNA-linked primary activated alcohols to aldehydes. The semiaqueous, room-temperature reaction conditions afford oxidation of benzylic, heterobenzylic, and allylic alcohols in high yield, with DNA compatibility verified by mass spectrometry, qPCR, Sanger sequencing, and ligation assays. Subsequent transformations of the resulting aldehydes demonstrate the potential of this method for robust library diversification.
Collapse
Affiliation(s)
- Justice L. Merrifield
- Department of Chemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
| | - Edward B. Pimentel
- Department of Chemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
| | - Trenton M. Peters-Clarke
- Department of Chemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
- Department of Biomolecular Chemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
| | - Daniel J. Nesbitt
- Department of Chemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
| | - Joshua J. Coon
- Department of Chemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
- Department of Biomolecular Chemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
- National Center for Quantitative Biology of Complex Systems, Madison, Wisconsin 53706, United States
- Morgridge Institute for Research, Madison, Wisconsin 53515, United States
| | - Jeffrey D. Martell
- Department of Chemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
- Carbone Cancer Center, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin 53705, United States
| |
Collapse
|
3
|
Xu H, Tan T, Zhang Y, Wang Y, Pan K, Yao Y, Zhang S, Gu Y, Chen W, Li J, Dong H, Meng Y, Ma P, Hou W, Yang G. Metal-Free and Open-Air Arylation Reactions of Diaryliodonium Salts for DNA-Encoded Library Synthesis. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 9:e2202790. [PMID: 35853237 PMCID: PMC9475524 DOI: 10.1002/advs.202202790] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/12/2022] [Revised: 06/17/2022] [Indexed: 06/15/2023]
Abstract
A successful DNA-encoded library (DEL) will consist of diverse skeletons and cover chemical space as comprehensive as possible to fully realize its potential in drug discovery and chemical biology. However, the lack of versatile on-DNA arylation methods for phenols that are less nucleophilic and reactive poses a great hurdle for DEL to include diaryl ether, a privileged chemotype in pharmaceuticals and natural products. This work describes the use of "substrate activation" approach to address the arylation of DNA-conjugated phenols. Diaryliodonium salt, a highly electrophilic and reactive arylation reagent, is employed as Ar+ sources to ensure highly selective on-DNA arylation of phenols and oximes with both high yields and DNA fidelity. Notably, the new on-DNA arylation reaction can be applied to the late-stage modification of peptides containing tyrosine side-chain and to synthesize DNA-tagged analogues of existing drug molecules such as sorafenib, a known pan-kinase inhibitor. The new on-DNA diaryliodonium salts chemistry affords a greater flexibility in DEL design and synthesis.
Collapse
Affiliation(s)
- Hongtao Xu
- Shanghai Institute for Advanced Immunochemical StudiesShanghaiTech UniversityShanghai201210P. R. China
| | - Tingting Tan
- Shanghai Institute for Advanced Immunochemical StudiesShanghaiTech UniversityShanghai201210P. R. China
| | - Yiyuan Zhang
- Shanghai Institute for Advanced Immunochemical StudiesShanghaiTech UniversityShanghai201210P. R. China
| | - Yan Wang
- Shanghai Institute for Advanced Immunochemical StudiesShanghaiTech UniversityShanghai201210P. R. China
| | - Kangyin Pan
- Shanghai Institute for Advanced Immunochemical StudiesShanghaiTech UniversityShanghai201210P. R. China
| | - Ying Yao
- Shanghai Institute for Advanced Immunochemical StudiesShanghaiTech UniversityShanghai201210P. R. China
| | - Shuning Zhang
- Shanghai Institute for Advanced Immunochemical StudiesShanghaiTech UniversityShanghai201210P. R. China
| | - Yuang Gu
- Shanghai Institute for Advanced Immunochemical StudiesShanghaiTech UniversityShanghai201210P. R. China
| | - Wanting Chen
- Shanghai Institute for Advanced Immunochemical StudiesShanghaiTech UniversityShanghai201210P. R. China
| | - Jie Li
- Shanghai Institute for Advanced Immunochemical StudiesShanghaiTech UniversityShanghai201210P. R. China
| | - Hewei Dong
- College of Pharmaceutical Science and Institute of Drug Development & Chemical BiologyZhejiang University of TechnologyHangzhou310014P. R. China
| | - Yu Meng
- College of Pharmaceutical Science and Institute of Drug Development & Chemical BiologyZhejiang University of TechnologyHangzhou310014P. R. China
| | - Peixiang Ma
- Shanghai Institute for Advanced Immunochemical StudiesShanghaiTech UniversityShanghai201210P. R. China
- Shanghai Key Laboratory of Orthopedic ImplantsDepartment of Orthopedic SurgeryShanghai Ninth People's HospitalShanghai Jiao Tong UniversitySchool of MedicineShanghai200011P. R. China
| | - Wei Hou
- College of Pharmaceutical Science and Institute of Drug Development & Chemical BiologyZhejiang University of TechnologyHangzhou310014P. R. China
| | - Guang Yang
- Shanghai Institute for Advanced Immunochemical StudiesShanghaiTech UniversityShanghai201210P. R. China
| |
Collapse
|
4
|
Melsen PRA, Yoshisada R, Jongkees SAK. Opportunities for Expanding Encoded Chemical Diversification and Improving Hit Enrichment in mRNA-Displayed Peptide Libraries. Chembiochem 2022; 23:e202100685. [PMID: 35100479 PMCID: PMC9306583 DOI: 10.1002/cbic.202100685] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Revised: 01/27/2022] [Indexed: 11/07/2022]
Abstract
DNA-encoded small-molecule libraries and mRNA displayed peptide libraries both use numerically large pools of oligonucleotide-tagged molecules to identify potential hits for protein targets. They differ dramatically, however, in the 'drug-likeness' of the molecules that each can be used to discover. We give here an overview of the two techniques, comparing some advantages and disadvantages of each, and suggest areas where particularly mRNA display can benefit from adopting advances developed with DNA-encoded small molecule libraries. We outline cases where chemical modification of the peptide library has already been used in mRNA display, and survey opportunities to expand this using examples from DNA-encoded small molecule libraries. We also propose potential opportunities for encoding such reactions within the mRNA/cDNA tag of an mRNA-displayed peptide library to allow a more diversity-oriented approach to library modification. Finally, we outline alternate approaches for enriching target-binding hits from a pooled and tagged library, and close by detailing several examples of how an adjusted mRNA-display based approach could be used to discover new 'drug-like' modified small peptides.
Collapse
Affiliation(s)
- Paddy R. A. Melsen
- Department of Chemistry and Pharmaceutical SciencesVU AmsterdamDe Boelelaan 11081081 HZAmsterdamThe Netherlands
| | - Ryoji Yoshisada
- Department of Chemistry and Pharmaceutical SciencesVU AmsterdamDe Boelelaan 11081081 HZAmsterdamThe Netherlands
| | - Seino A. K. Jongkees
- Department of Chemistry and Pharmaceutical SciencesVU AmsterdamDe Boelelaan 11081081 HZAmsterdamThe Netherlands
| |
Collapse
|
5
|
Zhu Z, Boger DL. N1/N4 1,4-Cycloaddition of 1,2,4,5-Tetrazines with Enamines Promoted by the Lewis Acid ZnCl 2. J Org Chem 2022; 87:6288-6301. [PMID: 35417656 PMCID: PMC9081262 DOI: 10.1021/acs.joc.2c00543] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The second example of selective N1/N4 1,4-cycloaddition (vs C3/C6 1,4-cycloaddition) of 1,2,4,5-tetrazines with preformed or in situ generated enamines now promoted by the Lewis acid ZnCl2 and with an expanded scope is described. The reaction constitutes a formal [4 + 2] cycloaddition across two nitrogen atoms (N1/N4 vs C3/C6) of a 1,2,4,5-tetrazine followed by retro [4 + 2] cycloaddition loss of a nitrile and aromatization to provide 1,2,4-triazines. Optimization of reaction parameters, simplification of its implementation through in situ enamine generation from ketones, definition of the enamine reaction scope for 3,6-bis(thiomethyl)-1,2,4,5-tetrazine, exploration of the 1,2,4,5-tetrazine scope, and representative applications of the product 1,2,4-triazines are detailed. The work establishes and further extends a powerful method for efficient one-step regioselective synthesis of 1,2,4-triazines under mild reaction conditions directly now from easily accessible ketones. It extends the substrate scope of a solvent (hexafluoroisopropanol) hydrogen bonding-promoted reaction that we recently reported with aryl-conjugated enamines, permitting the use of simple ketone-derived enamines and expanding the generality of the remarkable reaction. The reaction is regioselective with respect to the site of reaction with unsymmetrical ketones and provides exclusively a single 1,2,4-triazine regioisomer consistent with our previously established stepwise mechanism of formal N1/N4 1,4-cycloaddition, overcoming the challenges observed in conventional approaches to 1,2,4-triazines.
Collapse
Affiliation(s)
- Zixi Zhu
- Department of Chemistry and The Skaggs Institute for Chemical Biology, The Scripps Research Institute, 10550 N. Torrey Pines Road, La Jolla, California 92037, United States
| | - Dale L Boger
- Department of Chemistry and The Skaggs Institute for Chemical Biology, The Scripps Research Institute, 10550 N. Torrey Pines Road, La Jolla, California 92037, United States
| |
Collapse
|
6
|
Fair RJ, Walsh RT, Hupp CD. The expanding reaction toolkit for DNA-encoded libraries. Bioorg Med Chem Lett 2021; 51:128339. [PMID: 34478840 DOI: 10.1016/j.bmcl.2021.128339] [Citation(s) in RCA: 50] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2021] [Revised: 08/13/2021] [Accepted: 08/20/2021] [Indexed: 12/30/2022]
Abstract
Over the past decade, DNA-encoded libraries (DELs) have emerged as a leading platform for small molecule drug discovery among pharmaceutical companies, biotech companies and academic drug hunters alike. This revolutionary technology has tremendous potential that is yet to be fully realized, as the exploration of therapeutically relevant chemical space is fueled by the ever-expanding repertoire of DNA-compatible reactions used to construct the libraries. Advances in direct coupling reactions, like photo-catalytic cross couplings, unique cyclizations such as the formation of 1,2,4-oxadiazoles, and new functional group transformations are valuable contributions to the DEL reaction toolkit, and indicate where future reaction development efforts should focus in order to maximize the productivity of DELs.
Collapse
Affiliation(s)
| | - Ryan T Walsh
- X-Chem Inc., 100 Beaver Street, Waltham, MA 02453, USA
| | | |
Collapse
|
7
|
Abstract
Click chemistry, proposed nearly 20 years ago, promised access to novel chemical space by empowering combinatorial library synthesis with a "few good reactions". These click reactions fulfilled key criteria (broad scope, quantitative yield, abundant starting material, mild reaction conditions, and high chemoselectivity), keeping the focus on molecules that would be easy to make, yet structurally diverse. This philosophy bears a striking resemblance to DNA-encoded library (DEL) technology, the now-dominant combinatorial chemistry paradigm. This review highlights the similarities between click and DEL reaction design and deployment in combinatorial library settings, providing a framework for the design of new DEL synthesis technologies to enable next-generation drug discovery.
Collapse
Affiliation(s)
- Patrick R Fitzgerald
- Skaggs Doctoral Program in the Chemical and Biological Sciences, The Scripps Research Institute, 130 Scripps Way, Jupiter, Florida 33458, United States
| | - Brian M Paegel
- Departments of Pharmaceutical Sciences, Chemistry, & Biomedical Engineering, University of California, Irvine, 101 Theory Suite 100, Irvine, California 92617, United States
- Department of Chemistry, The Scripps Research Institute, 130 Scripps Way, Jupiter, Florida 33458, United States
| |
Collapse
|
8
|
Lenci E, Baldini L, Trabocchi A. Diversity-oriented synthesis as a tool to expand the chemical space of DNA-encoded libraries. Bioorg Med Chem 2021; 41:116218. [PMID: 34030087 DOI: 10.1016/j.bmc.2021.116218] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Revised: 05/07/2021] [Accepted: 05/11/2021] [Indexed: 12/12/2022]
Abstract
DNA-encoded libraries (DEL) represent a powerful technology for generating compound collections for drug discovery campaigns, that have allowed for the selection of many hit compounds over last three decades. However, the application of split-and-pool combinatorial methodologies, as well as the limitation imposed by DNA-compatible chemistry, has often brought to a limited exploration of the chemical space, with an over-representation of flat aromatic or peptide-like structures, whereas a higher scaffold complexity is generally associated with a more successful biological activity of the library. In this context, the application of Diversity-Oriented Synthesis, capable of creating sp3-rich molecular entities even starting from simple flat building blocks, can represent an efficient strategy to significantly broaden the chemical space explored by DELs. In this review, we present selected examples of DNA-compatible complexity-generating reactions that can be applied for the generation of DNA-encoded DOS libraries, including: (i) multicomponent reactions; (ii) C-H/C-X functionalization; (iii) tandem approaches; (iv) cycloadditions; (v) reactions introducing privileged elements. Also, selected case studies on the generation of DELs with high scaffold diversity are discussed, reporting their application in drug discovery programs.
Collapse
Affiliation(s)
- Elena Lenci
- Department of Chemistry "Ugo Schiff", University of Florence, Via della Lastruccia 13, 50019 Sesto Fiorentino, Italy
| | - Lorenzo Baldini
- Department of Chemistry "Ugo Schiff", University of Florence, Via della Lastruccia 13, 50019 Sesto Fiorentino, Italy
| | - Andrea Trabocchi
- Department of Chemistry "Ugo Schiff", University of Florence, Via della Lastruccia 13, 50019 Sesto Fiorentino, Italy; Interdepartmental Center for Preclinical Development of Molecular Imaging (CISPIM), University of Florence, Viale Morgagni 85, 50134 Florence, Italy.
| |
Collapse
|
9
|
Kölmel DK, Zhu H, Flanagan ME, Sakata SK, Harris AR, Wan J, Morgan BA. Employing Photocatalysis for the Design and Preparation of DNA‐Encoded Libraries: A Case Study. CHEM REC 2021; 21:616-630. [DOI: 10.1002/tcr.202000148] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2020] [Revised: 01/18/2021] [Accepted: 01/19/2021] [Indexed: 02/06/2023]
Affiliation(s)
- Dominik K. Kölmel
- Worldwide Research and Development Pfizer Inc Eastern Point Road Groton CT 06340 United States
| | - Hongyao Zhu
- Worldwide Research and Development Pfizer Inc Eastern Point Road Groton CT 06340 United States
| | - Mark E. Flanagan
- Worldwide Research and Development Pfizer Inc Eastern Point Road Groton CT 06340 United States
| | - Sylvie K. Sakata
- Worldwide Research and Development Pfizer Inc 10770 Science Center Drive San Diego CA 92121 United States
| | - Anthony R. Harris
- Worldwide Research and Development Pfizer Inc Eastern Point Road Groton CT 06340 United States
| | - Jinqiao Wan
- HitGen Inc Building 6, No. 8 Huigu first East Road, Tianfu International Bio-Town, Shuangliu District Chengdu City Sichuan Province P. R. China
| | - Barry A. Morgan
- HitGen Inc Building 6, No. 8 Huigu first East Road, Tianfu International Bio-Town, Shuangliu District Chengdu City Sichuan Province P. R. China
- HitGen Pharmaceuticals Inc PO Box 88240 Houston TX 77288 United States
| |
Collapse
|
10
|
Shi Y, Wu YR, Yu JQ, Zhang WN, Zhuang CL. DNA-encoded libraries (DELs): a review of on-DNA chemistries and their output. RSC Adv 2021; 11:2359-2376. [PMID: 35424149 PMCID: PMC8693808 DOI: 10.1039/d0ra09889b] [Citation(s) in RCA: 62] [Impact Index Per Article: 20.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2020] [Accepted: 12/21/2020] [Indexed: 12/27/2022] Open
Abstract
A DNA-encoded library is a collection of small molecules covalently linked to DNA that has unique information about the identity and the structure of each library member. A DNA-encoded chemical library (DEL) is broadly adopted by major pharmaceutical companies and used in numerous drug discovery programs. The application of the DEL technology is advantageous at the initial period of drug discovery because of reduced cost, time, and storage space for the identification of target compounds. The key points for the construction of DELs comprise the development and the selection of the encoding methods, transfer of routine chemical reaction from off-DNA to on-DNA, and exploration of new chemical reactions on DNA. The limitations in the chemical space and the diversity of DEL were reduced gradually by using novel DNA-compatible reactions based on the formation and the cleavage of various bonds. Here, we summarized a series of novel DNA-compatible chemistry reactions for DEL building blocks and analysed the druggability of screened hit molecules via DELs in the past five years.
Collapse
Affiliation(s)
- Ying Shi
- School of Pharmacy, Key Laboratory of Hui Ethnic Medicine Modernization, Ministry of Education, Ningxia Medical University 1160 Shengli Street Yinchuan 750004 China
| | - Yan-Ran Wu
- School of Pharmacy, Key Laboratory of Hui Ethnic Medicine Modernization, Ministry of Education, Ningxia Medical University 1160 Shengli Street Yinchuan 750004 China
| | - Jian-Qiang Yu
- School of Pharmacy, Key Laboratory of Hui Ethnic Medicine Modernization, Ministry of Education, Ningxia Medical University 1160 Shengli Street Yinchuan 750004 China
| | - Wan-Nian Zhang
- School of Pharmacy, Key Laboratory of Hui Ethnic Medicine Modernization, Ministry of Education, Ningxia Medical University 1160 Shengli Street Yinchuan 750004 China
- School of Pharmacy, Second Military Medical University 325 Guohe Road Shanghai 200433 China
| | - Chun-Lin Zhuang
- School of Pharmacy, Key Laboratory of Hui Ethnic Medicine Modernization, Ministry of Education, Ningxia Medical University 1160 Shengli Street Yinchuan 750004 China
- School of Pharmacy, Second Military Medical University 325 Guohe Road Shanghai 200433 China
| |
Collapse
|
11
|
Mao W, Tang J, Dai L, He X, Li J, Cai L, Liao P, Jiang R, Zhou J, Wu H. A General Strategy to Design Highly Fluorogenic Far-Red and Near-Infrared Tetrazine Bioorthogonal Probes. Angew Chem Int Ed Engl 2020; 60:2393-2397. [PMID: 33079440 DOI: 10.1002/anie.202011544] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2020] [Revised: 10/05/2020] [Indexed: 02/05/2023]
Abstract
Highly fluorogenic tetrazine bioorthogonal probes emitting at near-infrared wavelengths are in strong demand for biomedical imaging applications. Herein, we have developed a strategy for forming a palette of novel Huaxi-Fluor probes in situ, whose fluorescence increases hundreds of times upon forming the bioorthogonal reaction product, pyridazine. The resulting probes show large Stokes shifts and high quantum yields. Manipulating the conjugate length and pull-push strength in the fluorophore skeleton allows the emission wavelength to be fine-tuned from 556 to 728 nm. The highly photo-stable and biocompatible probes are suitable for visualizing organelles in live cells without a washing step and for imaging of tumors in live small animals to depths of 500 μm by two-photon excitation.
Collapse
Affiliation(s)
- Wuyu Mao
- Huaxi MR Research Center, Department of Nuclear Medicine, Frontiers Science Center for Disease-related Molecular Network, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, 610041, China
| | - Jie Tang
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, St Lucia, Brisbane, QLD, 4072, Australia
| | - Liqun Dai
- Huaxi MR Research Center, Department of Nuclear Medicine, Frontiers Science Center for Disease-related Molecular Network, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, 610041, China
| | - Xinyu He
- Huaxi MR Research Center, Department of Nuclear Medicine, Frontiers Science Center for Disease-related Molecular Network, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, 610041, China
| | - Jie Li
- Huaxi MR Research Center, Department of Nuclear Medicine, Frontiers Science Center for Disease-related Molecular Network, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, 610041, China
| | - Larry Cai
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, St Lucia, Brisbane, QLD, 4072, Australia
| | - Ping Liao
- Laboratory of Anesthesia and Critical Care Medicine, Department of Anesthesiology, West China Hospital of Sichuan University, Chengdu, Sichuan, 610000, China
| | - Ruotian Jiang
- Laboratory of Anesthesia and Critical Care Medicine, Department of Anesthesiology, West China Hospital of Sichuan University, Chengdu, Sichuan, 610000, China
| | - Jingwei Zhou
- Institute of clinical pharmacology, Science and Technology Innovation Center, Guangzhou University of Chinese Medicine, Guangzhou, 510405, Guangdong, China
| | - Haoxing Wu
- Huaxi MR Research Center, Department of Nuclear Medicine, Frontiers Science Center for Disease-related Molecular Network, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, 610041, China
| |
Collapse
|
12
|
Kölmel DK, Ratnayake AS, Flanagan ME. Photoredox cross-electrophile coupling in DNA-encoded chemistry. Biochem Biophys Res Commun 2020; 533:201-208. [DOI: 10.1016/j.bbrc.2020.04.028] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2019] [Accepted: 04/06/2020] [Indexed: 12/22/2022]
|
13
|
Mao W, Tang J, Dai L, He X, Li J, Cai L, Liao P, Jiang R, Zhou J, Wu H. A General Strategy to Design Highly Fluorogenic Far‐Red and Near‐Infrared Tetrazine Bioorthogonal Probes. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202011544] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Wuyu Mao
- Huaxi MR Research Center Department of Nuclear Medicine Frontiers Science Center for Disease-related Molecular Network National Clinical Research Center for Geriatrics West China Hospital Sichuan University Chengdu 610041 China
| | - Jie Tang
- Australian Institute for Bioengineering and Nanotechnology The University of Queensland, St Lucia Brisbane QLD 4072 Australia
| | - Liqun Dai
- Huaxi MR Research Center Department of Nuclear Medicine Frontiers Science Center for Disease-related Molecular Network National Clinical Research Center for Geriatrics West China Hospital Sichuan University Chengdu 610041 China
| | - Xinyu He
- Huaxi MR Research Center Department of Nuclear Medicine Frontiers Science Center for Disease-related Molecular Network National Clinical Research Center for Geriatrics West China Hospital Sichuan University Chengdu 610041 China
| | - Jie Li
- Huaxi MR Research Center Department of Nuclear Medicine Frontiers Science Center for Disease-related Molecular Network National Clinical Research Center for Geriatrics West China Hospital Sichuan University Chengdu 610041 China
| | - Larry Cai
- Australian Institute for Bioengineering and Nanotechnology The University of Queensland, St Lucia Brisbane QLD 4072 Australia
| | - Ping Liao
- Laboratory of Anesthesia and Critical Care Medicine Department of Anesthesiology West China Hospital of Sichuan University Chengdu Sichuan 610000 China
| | - Ruotian Jiang
- Laboratory of Anesthesia and Critical Care Medicine Department of Anesthesiology West China Hospital of Sichuan University Chengdu Sichuan 610000 China
| | - Jingwei Zhou
- Institute of clinical pharmacology Science and Technology Innovation Center Guangzhou University of Chinese Medicine Guangzhou 510405 Guangdong China
| | - Haoxing Wu
- Huaxi MR Research Center Department of Nuclear Medicine Frontiers Science Center for Disease-related Molecular Network National Clinical Research Center for Geriatrics West China Hospital Sichuan University Chengdu 610041 China
| |
Collapse
|
14
|
Yuen J, Chai J, Ding Y. Condensation of DNA-Conjugated Imines with Homophthalic Anhydride for the Synthesis of Isoquinolones on DNA. Bioconjug Chem 2020; 31:2712-2718. [DOI: 10.1021/acs.bioconjchem.0c00508] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Josephine Yuen
- Encoded Library Technologies/NCE Molecular Discovery, R&D Medicinal Science and Technology, GlaxoSmithKline, 200 Cambridgepark Drive, Cambridge, Massachusetts 02140, United States
| | - Jing Chai
- Encoded Library Technologies/NCE Molecular Discovery, R&D Medicinal Science and Technology, GlaxoSmithKline, 200 Cambridgepark Drive, Cambridge, Massachusetts 02140, United States
| | - Yun Ding
- Encoded Library Technologies/NCE Molecular Discovery, R&D Medicinal Science and Technology, GlaxoSmithKline, 200 Cambridgepark Drive, Cambridge, Massachusetts 02140, United States
| |
Collapse
|
15
|
Fan Z, Zhao S, Liu T, Shen PX, Cui ZN, Zhuang Z, Shao Q, Chen JS, Ratnayake AS, Flanagan ME, Kölmel DK, Piotrowski DW, Richardson P, Yu JQ. Merging C(sp 3)-H activation with DNA-encoding. Chem Sci 2020; 11:12282-12288. [PMID: 34094436 PMCID: PMC8162953 DOI: 10.1039/d0sc03935g] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
DNA-encoded library (DEL) technology has the potential to dramatically expedite hit identification in drug discovery owing to its ability to perform protein affinity selection with millions or billions of molecules in a few experiments. To expand the molecular diversity of DEL, it is critical to develop different types of DNA-encoded transformations that produce billions of molecules with distinct molecular scaffolds. Sequential functionalization of multiple C–H bonds provides a unique avenue for creating diversity and complexity from simple starting materials. However, the use of water as solvent, the presence of DNA, and the extremely low concentration of DNA-encoded coupling partners (0.001 M) have hampered the development of DNA-encoded C(sp3)–H activation reactions. Herein, we report the realization of palladium-catalyzed C(sp3)–H arylation of aliphatic carboxylic acids, amides and ketones with DNA-encoded aryl iodides in water. Notably, the present method enables the use of alternative sets of monofunctional building blocks, providing a linchpin to facilitate further setup for DELs. Furthermore, the C–H arylation chemistry enabled the on-DNA synthesis of structurally-diverse scaffolds containing enriched C(sp3) character, chiral centers, cyclopropane, cyclobutane, and heterocycles. DNA-compatible C(sp3)–H activation reactions of aliphatic carboxylic acids, amides, and ketones were developed for efficient access to DEL synthesis.![]()
Collapse
Affiliation(s)
- Zhoulong Fan
- Department of Chemistry, The Scripps Research Institute 10550 North Torrey Pines Road, La Jolla CA 92037 USA
| | - Shuai Zhao
- Department of Chemistry, The Scripps Research Institute 10550 North Torrey Pines Road, La Jolla CA 92037 USA
| | - Tao Liu
- Department of Chemistry, The Scripps Research Institute 10550 North Torrey Pines Road, La Jolla CA 92037 USA
| | - Peng-Xiang Shen
- Department of Chemistry, The Scripps Research Institute 10550 North Torrey Pines Road, La Jolla CA 92037 USA
| | - Zi-Ning Cui
- Department of Chemistry, The Scripps Research Institute 10550 North Torrey Pines Road, La Jolla CA 92037 USA
| | - Zhe Zhuang
- Department of Chemistry, The Scripps Research Institute 10550 North Torrey Pines Road, La Jolla CA 92037 USA
| | - Qian Shao
- Department of Chemistry, The Scripps Research Institute 10550 North Torrey Pines Road, La Jolla CA 92037 USA
| | - Jason S Chen
- Automated Synthesis Facility, The Scripps Research Institute 10550 North Torrey Pines Road, La Jolla CA 92037 USA
| | - Anokha S Ratnayake
- Pfizer Medicinal Chemistry Eastern Point Road, Groton Connecticut 06340 USA
| | - Mark E Flanagan
- Pfizer Medicinal Chemistry Eastern Point Road, Groton Connecticut 06340 USA
| | - Dominik K Kölmel
- Pfizer Medicinal Chemistry Eastern Point Road, Groton Connecticut 06340 USA
| | - David W Piotrowski
- Pfizer Medicinal Chemistry Eastern Point Road, Groton Connecticut 06340 USA
| | - Paul Richardson
- Pfizer Medicinal Chemistry, 10578 Science Center Drive San Diego CA 09121 USA
| | - Jin-Quan Yu
- Department of Chemistry, The Scripps Research Institute 10550 North Torrey Pines Road, La Jolla CA 92037 USA
| |
Collapse
|
16
|
Li K, Liu X, Liu S, An Y, Shen Y, Sun Q, Shi X, Su W, Cui W, Duan Z, Kuai L, Yang H, Satz AL, Chen K, Jiang H, Zheng M, Peng X, Lu X. Solution-Phase DNA-Compatible Pictet-Spengler Reaction Aided by Machine Learning Building Block Filtering. iScience 2020; 23:101142. [PMID: 32446221 PMCID: PMC7243192 DOI: 10.1016/j.isci.2020.101142] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2020] [Revised: 04/14/2020] [Accepted: 05/04/2020] [Indexed: 02/05/2023] Open
Abstract
The application of machine learning toward DNA encoded library (DEL) technology is lacking despite obvious synergy between these two advancing technologies. Herein, a machine learning algorithm has been developed that predicts the conversion rate for the DNA-compatible reaction of a building block with a model DNA-conjugate. We exemplify the value of this technique with a challenging reaction, the Pictet-Spengler, where acidic conditions are normally required to achieve the desired cyclization between tryptophan and aldehydes to provide tryptolines. This is the first demonstration of using a machine learning algorithm to cull potential building blocks prior to their purchase and testing for DNA-encoded library synthesis. Importantly, this allows for a challenging reaction, with an otherwise very low building block pass rate in the test reaction, to still be used in DEL synthesis. Furthermore, because our protocol is solution phase it is directly applicable to standard plate-based DEL synthesis.
Collapse
Affiliation(s)
- Ke Li
- DNA Encoded Library Platform, WuXi AppTec, 288 Fute Zhong Road, Waigaoqiao Free Trade Zone, Shanghai 200131, China
| | - Xiaohong Liu
- Shanghai Institute for Advanced Immunochemical Studies, and School of Life Science and Technology, ShanghaiTech University, Shanghai, China; Drug Discovery and Design Center, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Shanghai 201203, China; University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing 100049, China
| | - Sixiu Liu
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 501 Haike Road, Zhang Jiang Hi-Tech Park, Pudong, Shanghai 201203, P. R. China; University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing 100049, China
| | - Yulong An
- DNA Encoded Library Platform, WuXi AppTec, 288 Fute Zhong Road, Waigaoqiao Free Trade Zone, Shanghai 200131, China
| | - Yanfang Shen
- DNA Encoded Library Platform, WuXi AppTec, 288 Fute Zhong Road, Waigaoqiao Free Trade Zone, Shanghai 200131, China
| | - Qingxia Sun
- DNA Encoded Library Platform, WuXi AppTec, 288 Fute Zhong Road, Waigaoqiao Free Trade Zone, Shanghai 200131, China
| | - Xiaodong Shi
- DNA Encoded Library Platform, WuXi AppTec, 288 Fute Zhong Road, Waigaoqiao Free Trade Zone, Shanghai 200131, China
| | - Wenji Su
- DNA Encoded Library Platform, WuXi AppTec, 288 Fute Zhong Road, Waigaoqiao Free Trade Zone, Shanghai 200131, China
| | - Weiren Cui
- DNA Encoded Library Platform, WuXi AppTec, 288 Fute Zhong Road, Waigaoqiao Free Trade Zone, Shanghai 200131, China
| | - Zhiqiang Duan
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 501 Haike Road, Zhang Jiang Hi-Tech Park, Pudong, Shanghai 201203, P. R. China; University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing 100049, China
| | - Letian Kuai
- DNA Encoded Library Platform, WuXi AppTec, 288 Fute Zhong Road, Waigaoqiao Free Trade Zone, Shanghai 200131, China
| | - Hongfang Yang
- DNA Encoded Library Platform, WuXi AppTec, 288 Fute Zhong Road, Waigaoqiao Free Trade Zone, Shanghai 200131, China
| | - Alexander L Satz
- DNA Encoded Library Platform, WuXi AppTec, 288 Fute Zhong Road, Waigaoqiao Free Trade Zone, Shanghai 200131, China
| | - Kaixian Chen
- Shanghai Institute for Advanced Immunochemical Studies, and School of Life Science and Technology, ShanghaiTech University, Shanghai, China; Drug Discovery and Design Center, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Shanghai 201203, China; University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing 100049, China
| | - Hualiang Jiang
- Shanghai Institute for Advanced Immunochemical Studies, and School of Life Science and Technology, ShanghaiTech University, Shanghai, China; Drug Discovery and Design Center, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Shanghai 201203, China; University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing 100049, China
| | - Mingyue Zheng
- Drug Discovery and Design Center, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Shanghai 201203, China; University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing 100049, China.
| | - Xuanjia Peng
- DNA Encoded Library Platform, WuXi AppTec, 288 Fute Zhong Road, Waigaoqiao Free Trade Zone, Shanghai 200131, China.
| | - Xiaojie Lu
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 501 Haike Road, Zhang Jiang Hi-Tech Park, Pudong, Shanghai 201203, P. R. China; University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing 100049, China.
| |
Collapse
|
17
|
Gerry CJ, Schreiber SL. Recent achievements and current trajectories of diversity-oriented synthesis. Curr Opin Chem Biol 2020; 56:1-9. [DOI: 10.1016/j.cbpa.2019.08.008] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2019] [Revised: 08/21/2019] [Accepted: 08/26/2019] [Indexed: 12/14/2022]
|
18
|
Li J, Li Y, Lu F, Liu L, Ji Q, Song K, Yin Q, Lerner RA, Yang G, Xu H, Ma P. A DNA-encoded library for the identification of natural product binders that modulate poly (ADP-ribose) polymerase 1, a validated anti-cancer target. Biochem Biophys Res Commun 2020; 533:241-248. [PMID: 32381359 DOI: 10.1016/j.bbrc.2020.04.022] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2020] [Accepted: 04/09/2020] [Indexed: 01/01/2023]
Abstract
Natural products have been an invaluable source of drug discovery, but their targets remain largely unknown. Natural products enriched DNA-encoded chemical libraries (nDELs) empower the researchers to rapidly and economically screen numerous natural products against various protein targets, and therefore promote the elucidation of the molecular mechanisms. In this work, we used poly (ADP-ribose) polymerase 1 (PARP1), as an example to explore the usage of nDEL for the functional natural products selection. We used late-stage modification approach to label three positive binders with unique DNA barcodes, whose dissociation constants range from sub-micromolar to micromolar. The selection criterion was set up according to the enrichment of these controls. Five natural products selected by this criterion directly bind to PARP1 in SPR, among which luteolin exhibits the highest inhibitory activity against PARP1. Moreover, luteolin selectively induces accumulation of DNA double-strand breaks and G2/M phase arrest in BRCA-deficient cells. All the findings from these investigations on luteolin support that PARP1 inhibition is one of the mechanisms for its anti-cancer activity.
Collapse
Affiliation(s)
- Jie Li
- Shanghai Institute for Advanced Immunochemical Studies, ShanghaiTech University, 201210, Shanghai, China; School of Life Science and Technology, ShanghaiTech University, 201210, Shanghai, China; Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, 200031, Shanghai, China; University of Chinese Academy of Sciences, 100049, Beijing, China
| | - Yu Li
- Shanghai Institute for Advanced Immunochemical Studies, ShanghaiTech University, 201210, Shanghai, China; School of Life Science and Technology, ShanghaiTech University, 201210, Shanghai, China; Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, 200031, Shanghai, China; University of Chinese Academy of Sciences, 100049, Beijing, China
| | - Fengping Lu
- Shanghai Institute for Advanced Immunochemical Studies, ShanghaiTech University, 201210, Shanghai, China
| | - Lili Liu
- Shanghai Institute for Advanced Immunochemical Studies, ShanghaiTech University, 201210, Shanghai, China
| | - Qun Ji
- Shanghai Institute for Advanced Immunochemical Studies, ShanghaiTech University, 201210, Shanghai, China
| | - Ke Song
- Shanghai Institute for Advanced Immunochemical Studies, ShanghaiTech University, 201210, Shanghai, China
| | - Qianqian Yin
- Shanghai Institute for Advanced Immunochemical Studies, ShanghaiTech University, 201210, Shanghai, China
| | - Richard A Lerner
- Department of Chemistry, Scripps Research Institute, La Jolla, CA, 92037, USA
| | - Guang Yang
- Shanghai Institute for Advanced Immunochemical Studies, ShanghaiTech University, 201210, Shanghai, China
| | - Hongtao Xu
- Shanghai Institute for Advanced Immunochemical Studies, ShanghaiTech University, 201210, Shanghai, China.
| | - Peixiang Ma
- Shanghai Institute for Advanced Immunochemical Studies, ShanghaiTech University, 201210, Shanghai, China.
| |
Collapse
|
19
|
Turkett JA, Ringuette AE, Lindsley CW, Bender AM. Synthesis of Substituted 6,7-Dihydro-5 H-pyrrolo[2,3- c]pyridazines/pyrazines via Catalyst-Free Tandem Hydroamination-Aromatic Substitution. J Org Chem 2020; 85:6123-6130. [PMID: 32227869 DOI: 10.1021/acs.joc.9b03463] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Herein, we report an efficient and operationally simple synthesis of 6,7-dihydro-5H-pyrrolo[2,3-c]pyridazines and 6,7-dihydro-5H-pyrrolo[2,3-b]pyrazines via a tandem hydroamination-SNAr sequence that makes use of mild reagents under catalyst-free conditions in moderate to high yields. This chemistry expands the known scope of pyridazine/pyrazine chemistry and can be applied toward the synthesis of novel drug-like molecules with favorable bioactivity and pharmacokinetic properties.
Collapse
|
20
|
Madsen D, Azevedo C, Micco I, Petersen LK, Hansen NJV. An overview of DNA-encoded libraries: A versatile tool for drug discovery. PROGRESS IN MEDICINAL CHEMISTRY 2020; 59:181-249. [PMID: 32362328 DOI: 10.1016/bs.pmch.2020.03.001] [Citation(s) in RCA: 46] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
DNA-encoded libraries (DELs) are collections of small molecules covalently attached to amplifiable DNA tags carrying unique information about the structure of each library member. A combinatorial approach is used to construct the libraries with iterative DNA encoding steps, facilitating tracking of the synthetic history of the attached compounds by DNA sequencing. Various screening protocols have been developed which allow protein target binders to be selected out of pools containing up to billions of different small molecules. The versatile methodology has allowed identification of numerous biologically active compounds and is now increasingly being adopted as a tool for lead discovery campaigns and identification of chemical probes. A great focus in recent years has been on developing DNA compatible chemistries that expand the structural diversity of the small molecule library members in DELs. This chapter provides an overview of the challenges and accomplishments in DEL technology, reviewing the technological aspects of producing and screening DELs with a perspective on opportunities, limitations, and future directions.
Collapse
|
21
|
Westphal MV, Hudson L, Mason JW, Pradeilles JA, Zécri FJ, Briner K, Schreiber SL. Water-Compatible Cycloadditions of Oligonucleotide-Conjugated Strained Allenes for DNA-Encoded Library Synthesis. J Am Chem Soc 2020; 142:7776-7782. [PMID: 32267148 DOI: 10.1021/jacs.9b13186] [Citation(s) in RCA: 60] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
DNA-encoded libraries of small molecules are being explored extensively for the identification of binders in early drug-discovery efforts. Combinatorial syntheses of such libraries require water- and DNA-compatible reactions, and the paucity of these reactions currently limit the chemical features of resulting barcoded products. The present work introduces strain-promoted cycloadditions of cyclic allenes under mild conditions to DNA-encoded library synthesis. Owing to distinct cycloaddition modes of these reactive intermediates with activated olefins, 1,3-dipoles, and dienes, the process generates diverse molecular architectures from a single precursor. The resulting DNA-barcoded compounds exhibit unprecedented ring and topographic features, related to elements found to be powerful in phenotypic screening.
Collapse
Affiliation(s)
- Matthias V Westphal
- Chemical Biology and Therapeutics Science Program, Broad Institute, 415 Main Street, Cambridge, Massachusetts 02142, United States.,Novartis Institutes for BioMedical Research, 181 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Liam Hudson
- Chemical Biology and Therapeutics Science Program, Broad Institute, 415 Main Street, Cambridge, Massachusetts 02142, United States.,Novartis Institutes for BioMedical Research, 181 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Jeremy W Mason
- Chemical Biology and Therapeutics Science Program, Broad Institute, 415 Main Street, Cambridge, Massachusetts 02142, United States.,Novartis Institutes for BioMedical Research, 181 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Johan A Pradeilles
- Chemical Biology and Therapeutics Science Program, Broad Institute, 415 Main Street, Cambridge, Massachusetts 02142, United States.,Novartis Institutes for BioMedical Research, 181 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Frédéric J Zécri
- Novartis Institutes for BioMedical Research, 181 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Karin Briner
- Novartis Institutes for BioMedical Research, 181 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Stuart L Schreiber
- Chemical Biology and Therapeutics Science Program, Broad Institute, 415 Main Street, Cambridge, Massachusetts 02142, United States.,Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge, Massachusetts 02138, United States
| |
Collapse
|
22
|
Wu W, Sun Z, Wang X, Lu X, Dai D. Construction of Thiazole-Fused Dihydropyrans via Formal [4 + 2] Cycloaddition Reaction on DNA. Org Lett 2020; 22:3239-3244. [PMID: 32243186 DOI: 10.1021/acs.orglett.0c01016] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
An efficient and facile formal [4 + 2] cycloaddition reaction was developed to synthesize diverse thiazole-fused dihydropyrans (TFDP) on DNA. Mild reaction conditions, broad substrate scope, and compatibility with subsequent enzymatic ligation demonstrated the utility of this methodology in DNA-encoded library synthesis.
Collapse
Affiliation(s)
- Wenting Wu
- Department of Therapeutic Discovery, Amgen Asia R&D Center, Amgen Research, 4560 Jinke Road, Pudong, Shanghai 201210, P. R. China
| | - Zhen Sun
- Department of Therapeutic Discovery, Amgen Asia R&D Center, Amgen Research, 4560 Jinke Road, Pudong, Shanghai 201210, P. R. China
| | - Xuan Wang
- Department of Therapeutic Discovery, Amgen Asia R&D Center, Amgen Research, 4560 Jinke Road, Pudong, Shanghai 201210, P. R. China.,State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Science, 501 Haike Road, Zhang Jiang Hi-Tech Park, Pudong, Shanghai 201203, P. R. China
| | - Xiaojie Lu
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Science, 501 Haike Road, Zhang Jiang Hi-Tech Park, Pudong, Shanghai 201203, P. R. China
| | - Dongcheng Dai
- Department of Therapeutic Discovery, Amgen Asia R&D Center, Amgen Research, 4560 Jinke Road, Pudong, Shanghai 201210, P. R. China
| |
Collapse
|
23
|
Kölmel DK, Ratnayake AS, Flanagan ME, Tsai MH, Duan C, Song C. Photocatalytic [2 + 2] Cycloaddition in DNA-Encoded Chemistry. Org Lett 2020; 22:2908-2913. [PMID: 32239950 DOI: 10.1021/acs.orglett.0c00574] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
The on-DNA synthesis of highly substituted cyclobutanes was achieved through a photocatalytic [2 + 2] cycloaddition reaction in aqueous solution. Readily available DNA-tagged styrene derivatives were reacted with structurally diverse cinnamates in the presence of an iridium-based photocatalyst, Ir(ppy)2(dtbbpy)PF6, to forge two new C(sp3)-C(sp3) bonds. This transformation was demonstrated to have excellent functional group tolerance and allowed for the facile installation of a variety of heteroaromatic substituents on a densely functionalized cyclobutane scaffold.
Collapse
Affiliation(s)
- Dominik K Kölmel
- Pfizer Worldwide Research and Development, Groton, Connecticut 06340, United States
| | - Anokha S Ratnayake
- Pfizer Worldwide Research and Development, Groton, Connecticut 06340, United States
| | - Mark E Flanagan
- Pfizer Worldwide Research and Development, Groton, Connecticut 06340, United States
| | - Mei-Hsuan Tsai
- HitGen Inc, Building 6, No. 8, Huigu first East Road, Tianfu International Bio-Town, Shuangliu District, Chengdu City, Sichuan Province P. R. China
| | - Cong Duan
- HitGen Inc, Building 6, No. 8, Huigu first East Road, Tianfu International Bio-Town, Shuangliu District, Chengdu City, Sichuan Province P. R. China
| | - Chao Song
- HitGen Inc, Building 6, No. 8, Huigu first East Road, Tianfu International Bio-Town, Shuangliu District, Chengdu City, Sichuan Province P. R. China
| |
Collapse
|
24
|
Sergeev PG, Nenajdenko VG. Recent advances in the chemistry of pyridazine — an important representative of six-membered nitrogen heterocycles. RUSSIAN CHEMICAL REVIEWS 2020. [DOI: 10.1070/rcr4922] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
25
|
Nguyen VT, Pandith A, Seo YJ. Propargylamine-selective dual fluorescence turn-on method for post-synthetic labeling of DNA. Chem Commun (Camb) 2020; 56:3199-3202. [PMID: 32068200 DOI: 10.1039/d0cc00255k] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
We have developed a propargylamine-selective dual fluorescence turn-on system, using ylidenemalononitrile enamines, for post-synthetic DNA labeling, allowing the direct monitoring of DNA using dual emission in living cells.
Collapse
Affiliation(s)
- Van Thang Nguyen
- Department of Bioactive Material Sciences, Jeonbuk National University, South Korea
| | - Anup Pandith
- Department of Chemistry, Jeonbuk National University, South Korea.
| | - Young Jun Seo
- Department of Bioactive Material Sciences, Jeonbuk National University, South Korea and Department of Chemistry, Jeonbuk National University, South Korea.
| |
Collapse
|
26
|
Song M, Hwang GT. DNA-Encoded Library Screening as Core Platform Technology in Drug Discovery: Its Synthetic Method Development and Applications in DEL Synthesis. J Med Chem 2020; 63:6578-6599. [PMID: 32039601 DOI: 10.1021/acs.jmedchem.9b01782] [Citation(s) in RCA: 99] [Impact Index Per Article: 24.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
DNA-encoded library technology (DELT) was introduced to our medicinal chemistry society more than 20 years ago. The application of DELT in the development of clinical candidates has been actively reported in the literature recently. A few representative examples include RIP1K inhibitors for inflammatory diseases and sEH inhibitors for endothelial dysfunction or abnormal tissue repair, among many others. Here, the authors would like to recall the recent developments in on-DNA synthetic methodologies for DEL construction and to analyze recent examples in the literature of DELT-based drug development efforts pursued in both the academic and industrial sectors. With this perspective, we hope to provide a useful summary of recent DELT-based drug discovery research and to discuss the future scope of DELT in medicinal chemistry.
Collapse
Affiliation(s)
- Minsoo Song
- New Drug Development Center (NDDC), Daegu-Gyeongbuk Medical Innovation Foundation (DGMIF), 80 Cheombok-ro, Dong-gu, Daegu 41061, Korea
| | - Gil Tae Hwang
- Department of Chemistry and Green-Nano Materials Research Center, Kyungpook National University, Daegu 41566, Korea
| |
Collapse
|
27
|
Xiong H, Gu Y, Zhang S, Lu F, Ji Q, Liu L, Ma P, Yang G, Hou W, Xu H. Iridium-catalyzed C–H amidation of s-tetrazines. Chem Commun (Camb) 2020; 56:4692-4695. [DOI: 10.1039/d0cc01647k] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Synthesis of ortho-amino substituted s-tetrazines by iridium-catalyzed C–H activation for bioconjugation and DNA-encoded library.
Collapse
Affiliation(s)
- Huan Xiong
- Shanghai Institute for Advanced Immunochemical Studies
- ShanghaiTech University
- Shanghai
- China
| | - Yuang Gu
- Shanghai Institute for Advanced Immunochemical Studies
- ShanghaiTech University
- Shanghai
- China
- School of Life Science and Technology
| | - Shuning Zhang
- Shanghai Institute for Advanced Immunochemical Studies
- ShanghaiTech University
- Shanghai
- China
- School of Life Science and Technology
| | - Fengping Lu
- Shanghai Institute for Advanced Immunochemical Studies
- ShanghaiTech University
- Shanghai
- China
| | - Qun Ji
- Shanghai Institute for Advanced Immunochemical Studies
- ShanghaiTech University
- Shanghai
- China
| | - Lili Liu
- Shanghai Institute for Advanced Immunochemical Studies
- ShanghaiTech University
- Shanghai
- China
| | - Peixiang Ma
- Shanghai Institute for Advanced Immunochemical Studies
- ShanghaiTech University
- Shanghai
- China
| | - Guang Yang
- Shanghai Institute for Advanced Immunochemical Studies
- ShanghaiTech University
- Shanghai
- China
| | - Wei Hou
- College of Pharmaceutical Science, and Institute of Drug Development & Chemical Biology, Zhejiang University of Technology
- Hangzhou
- China
| | - Hongtao Xu
- Shanghai Institute for Advanced Immunochemical Studies
- ShanghaiTech University
- Shanghai
- China
| |
Collapse
|
28
|
Singh B, Bhatia R, Pani B, Gupta D. Synthesis, crystal structures and biological evaluation of new pyridazine derivatives. J Mol Struct 2020. [DOI: 10.1016/j.molstruc.2019.127084] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
29
|
Gironda-Martínez A, Neri D, Samain F, Donckele EJ. DNA-Compatible Diazo-Transfer Reaction in Aqueous Media Suitable for DNA-Encoded Chemical Library Synthesis. Org Lett 2019; 21:9555-9558. [DOI: 10.1021/acs.orglett.9b03726] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
| | - Dario Neri
- Department of Chemistry and Applied Biosciences, Swiss Federal Institute of Technology (ETH Zürich), Vladimir-Prelog-Weg 3, CH-8093 Zürich, Switzerland
| | - Florent Samain
- Philochem AG, Libernstrasse 3, CH-8112 Otelfingen, Switzerland
| | | |
Collapse
|
30
|
Li JY, Miklossy G, Modukuri RK, Bohren KM, Yu Z, Palaniappan M, Faver JC, Riehle K, Matzuk MM, Simmons N. Palladium-Catalyzed Hydroxycarbonylation of (Hetero)aryl Halides for DNA-Encoded Chemical Library Synthesis. Bioconjug Chem 2019; 30:2209-2215. [PMID: 31329429 PMCID: PMC6706801 DOI: 10.1021/acs.bioconjchem.9b00447] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
![]()
A strategy
for DNA-compatible, palladium-catalyzed hydroxycarbonylation
of (hetero)aryl halides on DNA–chemical conjugates has been
developed. This method generally provided the corresponding carboxylic
acids in moderate to very good conversions for (hetero)aryl iodides
and bromides, and in poor to moderate conversions for (hetero)aryl
chlorides. These conditions were further validated by application
within a DNA-encoded chemical library synthesis and subsequent discovery
of enriched features from the library in selection experiments against
two protein targets.
Collapse
Affiliation(s)
- Jian-Yuan Li
- Center for Drug Discovery, Department of Pathology and Immunology , Baylor College of Medicine , Houston , Texas 77030 , United States
| | - Gabriella Miklossy
- Center for Drug Discovery, Department of Pathology and Immunology , Baylor College of Medicine , Houston , Texas 77030 , United States
| | - Ram K Modukuri
- Center for Drug Discovery, Department of Pathology and Immunology , Baylor College of Medicine , Houston , Texas 77030 , United States
| | - Kurt M Bohren
- Center for Drug Discovery, Department of Pathology and Immunology , Baylor College of Medicine , Houston , Texas 77030 , United States
| | - Zhifeng Yu
- Center for Drug Discovery, Department of Pathology and Immunology , Baylor College of Medicine , Houston , Texas 77030 , United States
| | - Murugesan Palaniappan
- Center for Drug Discovery, Department of Pathology and Immunology , Baylor College of Medicine , Houston , Texas 77030 , United States
| | - John C Faver
- Center for Drug Discovery, Department of Pathology and Immunology , Baylor College of Medicine , Houston , Texas 77030 , United States
| | - Kevin Riehle
- Center for Drug Discovery, Department of Pathology and Immunology , Baylor College of Medicine , Houston , Texas 77030 , United States
| | - Martin M Matzuk
- Center for Drug Discovery, Department of Pathology and Immunology , Baylor College of Medicine , Houston , Texas 77030 , United States
| | - Nicholas Simmons
- Center for Drug Discovery, Department of Pathology and Immunology , Baylor College of Medicine , Houston , Texas 77030 , United States
| |
Collapse
|
31
|
Škopić MK, Götte K, Gramse C, Dieter M, Pospich S, Raunser S, Weberskirch R, Brunschweiger A. Micellar Brønsted Acid Mediated Synthesis of DNA-Tagged Heterocycles. J Am Chem Soc 2019; 141:10546-10555. [PMID: 31244181 DOI: 10.1021/jacs.9b05696] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The translation of well-established molecular biology methods such as genetic coding, selection, and DNA sequencing to combinatorial organic chemistry and compound identification has made extremely large compound collections, termed DNA-encoded libraries, accessible for drug screening. However, the reactivity of the DNA imposes limitations on the choice of chemical methods for encoded library synthesis. For example, strongly acidic reaction conditions must be avoided because they damage the DNA by depurination, i.e. the cleavage of purine bases from the oligomer. Application of micellar catalysis holds much promise for encoded chemistry. Aqueous micellar dispersions enabled compound synthesis under often appealingly mild conditions. Amphiphilic block copolymers covalently functionalized with sulfonic acid moieties in the lipophilic portion assemble in water and locate the Brønsted catalyst in micelles. These acid nanoreactors enabled the reaction of DNA-conjugated aldehydes to diverse substituted tetrahydroquinolines and aminoimidazopyridines by Povarov and Groebke-Blackburn-Bienaymé reactions, respectively, and the cleavage of tBoc protective groups from amines. The polymer micelle design was successfully translated to the Cu/Bipyridine/TEMPO system mediating the oxidation of DNA-coupled alcohols to the corresponding aldehydes. These results suggest a potentially broad applicability of polymer micelles for encoded chemistry.
Collapse
Affiliation(s)
- M Klika Škopić
- Faculty of Chemistry and Chemical Biology , TU Dortmund University , Otto-Hahn-Straße 6 , 44227 Dortmund , Germany
| | - K Götte
- Faculty of Chemistry and Chemical Biology , TU Dortmund University , Otto-Hahn-Straße 6 , 44227 Dortmund , Germany
| | - C Gramse
- Faculty of Chemistry and Chemical Biology , TU Dortmund University , Otto-Hahn-Straße 6 , 44227 Dortmund , Germany
| | - M Dieter
- Faculty of Chemistry and Chemical Biology , TU Dortmund University , Otto-Hahn-Straße 6 , 44227 Dortmund , Germany
| | - S Pospich
- Max Planck Institute of Molecular Physiology , Otto-Hahn-Straße 11 , 44227 Dortmund , Germany
| | - S Raunser
- Max Planck Institute of Molecular Physiology , Otto-Hahn-Straße 11 , 44227 Dortmund , Germany
| | - R Weberskirch
- Faculty of Chemistry and Chemical Biology , TU Dortmund University , Otto-Hahn-Straße 6 , 44227 Dortmund , Germany
| | - A Brunschweiger
- Faculty of Chemistry and Chemical Biology , TU Dortmund University , Otto-Hahn-Straße 6 , 44227 Dortmund , Germany
| |
Collapse
|
32
|
Zhao G, Huang Y, Zhou Y, Li Y, Li X. Future challenges with DNA-encoded chemical libraries in the drug discovery domain. Expert Opin Drug Discov 2019; 14:735-753. [DOI: 10.1080/17460441.2019.1614559] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Guixian Zhao
- Tumour Targeted Therapy and Chemical Biology Research Center, School of Pharmaceutical Sciences, Chongqing University, Chongqing, China
| | - Yiran Huang
- Department of Chemistry, The University of Hong Kong, Hong Kong SAR, China
| | - Yu Zhou
- Department of Chemistry, The University of Hong Kong, Hong Kong SAR, China
- Key Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, Shenzhen, China
| | - Yizhou Li
- Tumour Targeted Therapy and Chemical Biology Research Center, School of Pharmaceutical Sciences, Chongqing University, Chongqing, China
| | - Xiaoyu Li
- Department of Chemistry, The University of Hong Kong, Hong Kong SAR, China
| |
Collapse
|
33
|
Nicholas F, Bassi G, Zanetti T, Scheuermann J, Neri D. Screening of copper and palladium-mediated reactions compatible with DNA-encoded chemical libraries. Helv Chim Acta 2019; 102. [PMID: 32292208 DOI: 10.1002/hlca.201900033] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The construction of DNA-encoded chemical libraries (DECLs) crucially relies on the availability of chemical reactions, which are DNA-compatible and which exhibit high conversion rates for a large number of diverse substrates. In this work, we present our optimization and validation procedures for three copper and palladium-catalyzed reactions (Suzuki cross-coupling, Sonogashira cross-coupling and copper(I)-catalyzed alkyne-azide cycloaddition (CuAAC)), which have been successfully used by our group for the construction of large encoded libraries.
Collapse
Affiliation(s)
- Favalli Nicholas
- Institute of Pharmaceutical Sciences, ETH Zürich, 8093 Zürich (Switzerland)
| | - Gabriele Bassi
- Institute of Pharmaceutical Sciences, ETH Zürich, 8093 Zürich (Switzerland)
| | - Tania Zanetti
- Institute of Pharmaceutical Sciences, ETH Zürich, 8093 Zürich (Switzerland)
| | - Jörg Scheuermann
- Institute of Pharmaceutical Sciences, ETH Zürich, 8093 Zürich (Switzerland)
| | - Dario Neri
- Institute of Pharmaceutical Sciences, ETH Zürich, 8093 Zürich (Switzerland)
| |
Collapse
|
34
|
Gerry CJ, Yang Z, Stasi M, Schreiber SL. DNA-Compatible [3 + 2] Nitrone-Olefin Cycloaddition Suitable for DEL Syntheses. Org Lett 2019; 21:1325-1330. [PMID: 30762372 DOI: 10.1021/acs.orglett.9b00017] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The limited scope of DNA-compatible chemistry restricts the types of chemical features that can be incorporated into DNA-encoded libraries (DELs). Here, a method to synthesize DNA-conjugated polycyclic isoxazolidines via a [3 + 2] nitrone-olefin cycloaddition is described. The reaction is compatible with many olefin-containing substrates and diverse N-alkylhydroxylamines. The ability to perform subsequent DNA ligation and PCR amplification was also confirmed. This methodology facilitates the synthesis of DELs containing topographically complex compounds with underexplored chemical features.
Collapse
Affiliation(s)
- Christopher J Gerry
- Department of Chemistry and Chemical Biology , Harvard University , 12 Oxford Street , Cambridge , Massachusetts 02138 , United States.,Chemical Biology and Therapeutics Science Program , Broad Institute , 415 Main Street , Cambridge , Massachusetts 02142 , United States
| | - Zhenhua Yang
- Chemical Biology and Therapeutics Science Program , Broad Institute , 415 Main Street , Cambridge , Massachusetts 02142 , United States
| | - Michele Stasi
- Chemical Biology and Therapeutics Science Program , Broad Institute , 415 Main Street , Cambridge , Massachusetts 02142 , United States
| | - Stuart L Schreiber
- Department of Chemistry and Chemical Biology , Harvard University , 12 Oxford Street , Cambridge , Massachusetts 02138 , United States.,Chemical Biology and Therapeutics Science Program , Broad Institute , 415 Main Street , Cambridge , Massachusetts 02142 , United States
| |
Collapse
|
35
|
Phelan JP, Lang SB, Sim J, Berritt S, Peat AJ, Billings K, Fan L, Molander GA. Open-Air Alkylation Reactions in Photoredox-Catalyzed DNA-Encoded Library Synthesis. J Am Chem Soc 2019; 141:3723-3732. [PMID: 30753065 DOI: 10.1021/jacs.9b00669] [Citation(s) in RCA: 224] [Impact Index Per Article: 44.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
DNA-encoded library (DEL) technology is a powerful tool commonly used by the pharmaceutical industry for the identification of compounds with affinity to biomolecular targets. Success in this endeavor lies in sampling diverse chemical libraries. However, current DELs tend to be deficient in C(sp3) carbon counts. We report unique solutions to the challenge of increasing both the chemical diversity of these libraries and their C(sp3) carbon counts by merging Ni/photoredox dual catalytic C(sp2)-C(sp3) cross-coupling as well as photoredox-catalyzed radical/polar crossover alkylation protocols with DELs. The successful integration of multiple classes of radical sources enables the rapid incorporation of a diverse set of alkyl fragments.
Collapse
Affiliation(s)
- James P Phelan
- Roy and Diana Vagelos Laboratories, Department of Chemistry , University of Pennsylvania , 231 South 34th Street , Philadelphia , Pennsylvania 19104-6323 , United States
| | - Simon B Lang
- Roy and Diana Vagelos Laboratories, Department of Chemistry , University of Pennsylvania , 231 South 34th Street , Philadelphia , Pennsylvania 19104-6323 , United States
| | - Jaehoon Sim
- Roy and Diana Vagelos Laboratories, Department of Chemistry , University of Pennsylvania , 231 South 34th Street , Philadelphia , Pennsylvania 19104-6323 , United States
| | - Simon Berritt
- Roy and Diana Vagelos Laboratories, Department of Chemistry , University of Pennsylvania , 231 South 34th Street , Philadelphia , Pennsylvania 19104-6323 , United States
| | - Andrew J Peat
- GlaxoSmithKline , 1250 South Collegeville Road , Collegeville , Pennsylvania 19426 , United States
| | - Katelyn Billings
- GlaxoSmithKline , 200 Cambridge Park Drive , Cambridge , Massachusetts 02140 , United States
| | - Lijun Fan
- GlaxoSmithKline , 200 Cambridge Park Drive , Cambridge , Massachusetts 02140 , United States
| | - Gary A Molander
- Roy and Diana Vagelos Laboratories, Department of Chemistry , University of Pennsylvania , 231 South 34th Street , Philadelphia , Pennsylvania 19104-6323 , United States
| |
Collapse
|