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Trojan M, Hroch A, Gruden E, Cvačka J, Čejka J, Tavčar G, Rybáčková M, Kvíčala J. Modified aryldifluorophenylsilicates with improved activity and selectivity in nucleophilic fluorination of secondary substrates. RSC Adv 2024; 14:22326-22334. [PMID: 39010913 PMCID: PMC11247957 DOI: 10.1039/d4ra04332d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2024] [Accepted: 07/04/2024] [Indexed: 07/17/2024] Open
Abstract
Nucleophilic fluorination of secondary aliphatic substrates, especially of halides, still remains a challenge. Among the available reagents, TBAT belongs to one of the best choices due to its stability, affordable price and low toxicity. With the aim to improve its selectivity, we synthesized three analogues modified in the aryl part of the TBAT reagent with one or two electron donating methoxy groups or with one electron withdrawing trifluoromethyl group. All three reagents are air-stable compounds and their structure was confirmed by a single crystal X-ray analysis. In testing the reactivity and selectivity of the reagents with a library of secondary bromides, as well as of other selected primary and secondary substrates, we found that substitution with methoxy groups mostly improves both reactivity and selectivity compared to TBAT, while the substitution with trifluoromethyl group leads to inferior results. Difluorosilicates modified by more than two electron donating methoxy groups proved to be unstable and decomposed spontaneously to the HF2 - anion. DFT calculations of tetramethylammonium analogues of the studied reagents disclosed that the substitution of the phenyl group with the methoxy substituent lowers the transitions state energy of the decomposition to a fluorosilane-fluoride complex, while the substitution with the trifluoromethyl group has an opposite effect.
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Affiliation(s)
- Michal Trojan
- Department of Organic Chemistry, University of Chemistry and Technology, Prague Technická 5 166 28 Prague 6 Czech Republic
| | - Adam Hroch
- Department of Organic Chemistry, University of Chemistry and Technology, Prague Technická 5 166 28 Prague 6 Czech Republic
| | - Evelin Gruden
- Department of Inorganic Chemistry and Technology, "Jožef Stefan" Institute Jamova Cesta 39 Ljubljana Slovenia
| | - Josef Cvačka
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences Flemingovo Náměstí 542/2 160 00 Prague 6 Czech Republic
| | - Jan Čejka
- Department of Solid State Chemistry, University of Chemistry and Technology, Prague Technická 5 166 28 Prague 6 Czech Republic
| | - Gašper Tavčar
- Department of Inorganic Chemistry and Technology, "Jožef Stefan" Institute Jamova Cesta 39 Ljubljana Slovenia
| | - Markéta Rybáčková
- Department of Organic Chemistry, University of Chemistry and Technology, Prague Technická 5 166 28 Prague 6 Czech Republic
| | - Jaroslav Kvíčala
- Department of Organic Chemistry, University of Chemistry and Technology, Prague Technická 5 166 28 Prague 6 Czech Republic
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2
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Cycloaddition of epoxides and CO2 catalyzed by C2-symmetric cobaltoporphyrins: Structural effects and a kinetic study. J CO2 UTIL 2022. [DOI: 10.1016/j.jcou.2022.102242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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3
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Li Y, Xin S, Weng R, Liu X, Feng X. Asymmetric synthesis of chromanone lactones via vinylogous conjugate addition of butenolide to 2-ester chromones. Chem Sci 2022; 13:8871-8875. [PMID: 35975160 PMCID: PMC9350614 DOI: 10.1039/d2sc02541h] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2022] [Accepted: 07/04/2022] [Indexed: 11/23/2022] Open
Abstract
Chiral chromanone lactones are a class of natural products with important biological activity. We report a direct diastereo- and enantioselective vinylogous conjugate addition of butenolide to 2-ester substituted chromones. The transformation proceeded well in the presence of as low as 1 mol% of a chiral N,N'-dioxide/ScIII complex, 3 Å MS and a catalytic amount of hexafluoroisopropanol (HFIP). The scope of Michael acceptors includes a variety of substituted chromones at different positions, and the desired chromanone lactones upon reduction are afforded in good yield and diastereoselectivity, and excellent enantioselectivity (up to 99% ee). The strategy could be used in the concise synthesis of blennolide C and gonytolide A, C and G.
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Affiliation(s)
- Yi Li
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University Chengdu 610064 China
| | - Shuang Xin
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University Chengdu 610064 China
| | - Rui Weng
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University Chengdu 610064 China
| | - Xiaohua Liu
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University Chengdu 610064 China
| | - Xiaoming Feng
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University Chengdu 610064 China
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Kang L, Mao Y, Jiang S, Lu S. A practical synthesis of voxelotor. J Heterocycl Chem 2022. [DOI: 10.1002/jhet.4535] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Linlin Kang
- College of Chemistry and Chemical Engineering Shanghai University of Engineering Science, 333 Longteng Road Shanghai China
| | - Yongjun Mao
- College of Chemistry and Chemical Engineering Shanghai University of Engineering Science, 333 Longteng Road Shanghai China
| | - Shun Jiang
- College of Chemistry and Chemical Engineering Shanghai University of Engineering Science, 333 Longteng Road Shanghai China
| | - Sheng Lu
- College of Chemistry and Chemical Engineering Shanghai University of Engineering Science, 333 Longteng Road Shanghai China
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Cui J, Oriez R, Noda H, Watanabe T, Shibasaki M. Concise and Stereodivergent Approach to Chromanone Lactones through Copper‐Catalyzed Asymmetric Vinylogous Addition of Siloxyfurans to 2‐Ester‐Substituted Chromones. Angew Chem Int Ed Engl 2022; 61:e202203128. [DOI: 10.1002/anie.202203128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Indexed: 11/11/2022]
Affiliation(s)
- Jin Cui
- Institute of Microbial Chemistry (BIKAKEN) Tokyo, 3-14-23 Kamiosaki Shinagawa-ku, Tokyo 141-0021 Japan
| | - Raphaël Oriez
- Institute of Microbial Chemistry (BIKAKEN) Tokyo, 3-14-23 Kamiosaki Shinagawa-ku, Tokyo 141-0021 Japan
| | - Hidetoshi Noda
- Institute of Microbial Chemistry (BIKAKEN) Tokyo, 3-14-23 Kamiosaki Shinagawa-ku, Tokyo 141-0021 Japan
| | - Takumi Watanabe
- Institute of Microbial Chemistry (BIKAKEN) Tokyo, 3-14-23 Kamiosaki Shinagawa-ku, Tokyo 141-0021 Japan
| | - Masakatsu Shibasaki
- Institute of Microbial Chemistry (BIKAKEN) Tokyo, 3-14-23 Kamiosaki Shinagawa-ku, Tokyo 141-0021 Japan
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6
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Cui J, Oriez R, Noda H, Watanabe T, Shibasaki M. Concise and Stereodivergent Approach to Chromanone Lactones through Copper‐Catalyzed Asymmetric Vinylogous Addition of Siloxyfurans to 2‐Ester‐Substituted Chromones. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202203128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Jin Cui
- Institute of Microbial Chemistry (BIKAKEN) Tokyo, 3-14-23 Kamiosaki Shinagawa-ku, Tokyo 141-0021 Japan
| | - Raphaël Oriez
- Institute of Microbial Chemistry (BIKAKEN) Tokyo, 3-14-23 Kamiosaki Shinagawa-ku, Tokyo 141-0021 Japan
| | - Hidetoshi Noda
- Institute of Microbial Chemistry (BIKAKEN) Tokyo, 3-14-23 Kamiosaki Shinagawa-ku, Tokyo 141-0021 Japan
| | - Takumi Watanabe
- Institute of Microbial Chemistry (BIKAKEN) Tokyo, 3-14-23 Kamiosaki Shinagawa-ku, Tokyo 141-0021 Japan
| | - Masakatsu Shibasaki
- Institute of Microbial Chemistry (BIKAKEN) Tokyo, 3-14-23 Kamiosaki Shinagawa-ku, Tokyo 141-0021 Japan
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Abstract
AbstractCarbonylation, one of the most powerful approaches to the preparation of carbonylated compounds, has received significant attention from researchers active in various fields. Indeed, impressive progress has been made on this subject over the past few decades. Among the various types of carbonylation reactions, asymmetric carbonylation is a straightforward methodology for constructing chiral compounds. Although rhodium-catalyzed enantioselective hydroformylations have been discussed in several elegant reviews, a general review on palladium-catalyzed asymmetric carbonylations is still missing. In this review, we summarize and discuss recent achievements in palladium-catalyzed asymmetric carbonylation reactions. Notably, this review’s contents are categorized by reaction type.
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Sun J, Gu W, Yang H, Tang W. Enantioselective total synthesis of parnafungin A1 and 10a- epi-hirtusneanine. Chem Sci 2021; 12:10313-10320. [PMID: 34377417 PMCID: PMC8336460 DOI: 10.1039/d1sc02919c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Accepted: 06/30/2021] [Indexed: 12/11/2022] Open
Abstract
The first and enantioselective total synthesis of the heterodimeric biaryl antifungal natural product parnafungin A1 as well as complex biaryl tetrahydroxanthone 10a-epi-hirtusneanine is accomplished, by employing cross-coupling through the benzoxaborole strategy to construct their sterically hindered biaryl cores. Besides the powerful Suzuki-Miyaura cross-coupling, the synthesis of parnafungin A1 also features a highly diastereoselective oxa-Michael addition to construct a tetrahydroxanthone skeleton, and an effective Zn-mediated reductive cyclization-Mitsunobu sequence to furnish the isoxazolidinone structure. Key innovations in total synthesis of 10a-epi-hirtusneanine include the employment of DTBS protection for functional group manipulation on the tetrahydroxanthone skeleton, stereoselective methylations, and complete reversal of the stereochemistry of the C5-hydroxy group using oxidation/Evans-Saksena reduction, as well as the strategy of preparing both complex tetrahydroxanthone monomers from the same chiral intermediate 25.
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Affiliation(s)
- Jiawei Sun
- State Key Laboratory of Bio-Organic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences 345 Ling Ling Rd Shanghai 200032 China
| | - Wei Gu
- State Key Laboratory of Bio-Organic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences 345 Ling Ling Rd Shanghai 200032 China
| | - He Yang
- State Key Laboratory of Bio-Organic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences 345 Ling Ling Rd Shanghai 200032 China
| | - Wenjun Tang
- State Key Laboratory of Bio-Organic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences 345 Ling Ling Rd Shanghai 200032 China.,School of Chemistry and Materials Science, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences 1 Sub-lane Xiangshan Hangzhou 310024 China
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Guan Y, Buivydas TA, Lalisse RF, Attard JW, Ali R, Stern C, Hadad CM, Mattson AE. Robust, Enantioselective Construction of Challenging, Biologically Relevant Tertiary Ether Stereocenters. ACS Catal 2021; 11:6325-6333. [PMID: 37636585 PMCID: PMC10457089 DOI: 10.1021/acscatal.1c01095] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
A robust, catalytic enantioselective method to construct challenging, biologically relevant, tertiary ether stereocenters has been developed. The process capitalizes on readily accessible bis(oxazoline) ligands to control the facial selectivity of the addition of copper acetylides to benzopyrylium triflates, reactive species generated in situ. Up to 99% enantiomeric excesses are achieved with a broad substrate scope. Using density functional theory (DFT) calculations, the origin of the experimentally observed enantiocontrol was attributed to additional non-covalent interactions observed in the transition state leading to the major enantiomer, such as π-stacking. The resultant substrates have direct applications in the synthesis of naturally occurring bioactive chromanones and tetrahydroxanthones.
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Affiliation(s)
- Yong Guan
- Department of Chemistry and Biochemistry, Worcester Polytechnic Institute, 60 Prescott St., Worcester, MA 01609
| | - Tadas A. Buivydas
- Department of Chemistry and Biochemistry, Worcester Polytechnic Institute, 60 Prescott St., Worcester, MA 01609
| | - Remy F. Lalisse
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, OH 43210
| | - Jonathan W. Attard
- Department of Chemistry and Biochemistry, Worcester Polytechnic Institute, 60 Prescott St., Worcester, MA 01609
| | - Rameez Ali
- Department of Chemistry and Biochemistry, Worcester Polytechnic Institute, 60 Prescott St., Worcester, MA 01609
| | - Charlotte Stern
- Integrated Molecular Structure Education and Research Center, Northwestern University, Evanston, IL, 60208
| | - Christopher M. Hadad
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, OH 43210
| | - Anita E. Mattson
- Department of Chemistry and Biochemistry, Worcester Polytechnic Institute, 60 Prescott St., Worcester, MA 01609
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Kumamoto T, Hasegawa S, Adachi K, Katakawa K. Total Synthesis of (±)-4-Deoxyblennolide C via Spirochromanone. HETEROCYCLES 2021. [DOI: 10.3987/com-20-s(k)60] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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11
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Affiliation(s)
- Jianhua Chen
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, 3663 North Zhongshan Road, Shanghai 200062, China
| | - Yayue Li
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, 3663 North Zhongshan Road, Shanghai 200062, China
| | - Zheming Xiao
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, 3663 North Zhongshan Road, Shanghai 200062, China
| | - Haibing He
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, East China Normal University, 3663 North Zhongshan Road, Shanghai 200062, China
| | - Shuanhu Gao
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, 3663 North Zhongshan Road, Shanghai 200062, China
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, East China Normal University, 3663 North Zhongshan Road, Shanghai 200062, China
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12
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Guan Y, Attard JW, Mattson AE. Copper Bis(oxazoline)-Catalyzed Enantioselective Alkynylation of Benzopyrylium Ions. Chemistry 2020; 26:1742-1747. [PMID: 31867810 DOI: 10.1002/chem.201904822] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2019] [Indexed: 12/25/2022]
Abstract
The stereocontrolled construction of biologically relevant chromanones and tetrahydroxanthones has been achieved through the addition of alkynes to benzopyrylium trilfates under the influence of copper bis(oxazoline) catalysis. Excellent levels of enantiocontrol (63-98 % ee) are achieved in the addition of a variety of alkynes to an array of chromenones with a hydrogen in the 2-position. Promising levels of enantiocontrol (54-67 % ee) are achieved in the alkynylation of chromenones with esters in the 2-position, generating tertiary ether stereocenters resembling those frequently found in naturally occurring metabolites.
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Affiliation(s)
- Yong Guan
- Department of Chemistry and Biochemistry, Worcester Polytechnic Institute, 100 Institute Road, Worcester, MA, 01605, USA
| | - Jonathan W Attard
- Department of Chemistry and Biochemistry, Worcester Polytechnic Institute, 100 Institute Road, Worcester, MA, 01605, USA
| | - Anita E Mattson
- Department of Chemistry and Biochemistry, Worcester Polytechnic Institute, 100 Institute Road, Worcester, MA, 01605, USA
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F. Tietze L, A. Khan T. Synthesis of a Poly-Heterocyclic Tetra-Substituted Alkene via a Palladium-Catalyzed Four-Fold Domino Reaction for the Design of Polymeric Molecular Switches. HETEROCYCLES 2019. [DOI: 10.3987/com-18-s(f)94] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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14
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Lotz F, Kahle K, Kangani M, Senthilkumar S, Tietze LF. Domino C-H Activation Reactions through Proximity Effects. European J Org Chem 2018. [DOI: 10.1002/ejoc.201801289] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Florian Lotz
- Institute of Organic und Biomolecular Chemistry; Georg-August-University of Göttingen; Tammannstr. 2 37077 Göttingen Germany
| | - Klaus Kahle
- Institute of Organic und Biomolecular Chemistry; Georg-August-University of Göttingen; Tammannstr. 2 37077 Göttingen Germany
| | - Mehrnoush Kangani
- Institute of Organic und Biomolecular Chemistry; Georg-August-University of Göttingen; Tammannstr. 2 37077 Göttingen Germany
| | - Soundararasu Senthilkumar
- Institute of Organic und Biomolecular Chemistry; Georg-August-University of Göttingen; Tammannstr. 2 37077 Göttingen Germany
| | - Lutz F. Tietze
- Institute of Organic und Biomolecular Chemistry; Georg-August-University of Göttingen; Tammannstr. 2 37077 Göttingen Germany
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15
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Lee SY, Chiu YJ, Yang SM, Chen CM, Huang CC, Lee-Chen GJ, Lin W, Chang KH. Novel synthetic chalcone-coumarin hybrid for Aβ aggregation reduction, antioxidation, and neuroprotection. CNS Neurosci Ther 2018; 24:1286-1298. [PMID: 30596401 DOI: 10.1111/cns.13058] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2018] [Revised: 08/11/2018] [Accepted: 08/11/2018] [Indexed: 12/23/2022] Open
Abstract
BACKGROUND Aggregation of misfolded amyloid β (Aβ) in senile plaques causes oxidative stress and neuronal death in Alzheimer's disease (AD). Compounds possessing antiaggregation and antioxidant properties are promising candidate compounds for AD treatment. METHODS We examined the potential of synthetic derivatives of licochalcone A and coumarin for inhibiting Aβ aggregation, scavenging reactive oxygen species (ROS), and providing neuroprotection by using biochemical assays and Tet-On Aβ-GFP 293/SH-SY5Y cell models for AD. RESULTS Among test compounds, LM-031, a novel chalcone-coumarin hybrid, inhibited Aβ aggregation and scavenged free oxygen radicals. LM-031 markedly reduced Aβ misfolding and ROS as well as promoted neurite outgrowth and inhibited acetylcholinesterase in Tet-On Aβ-GFP 293/SH-SY5Y cells. Mechanistic studies showed upregulation of the HSPB1 chaperone, NRF2/NQO1/GCLC pathway, and CREB/BDNF/BCL2 pathway. Decreased neurite outgrowth upon the induction of Aβ-GFP was rescued by LM-031, which was counteracted by knockdown of HSPB1, NRF2, or CREB. CONCLUSION Taken together, these findings demonstrate that LM-031 exhibited antiaggregation, antioxidant, and neuroprotective effects against Aβ toxicity by enhancing HSPB1 and the NRF2-related antioxidant pathway as well as by activating the CREB-dependent survival and antiapoptosis pathway. These results imply that LM-031 may be a new therapeutic compound for AD.
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Affiliation(s)
- Shin-Ying Lee
- Department of Life Science, National Taiwan Normal University, Taipei, Taiwan
| | - Ya-Jen Chiu
- Department of Life Science, National Taiwan Normal University, Taipei, Taiwan
| | - Shu-Mei Yang
- Department of Chemistry, National Taiwan Normal University, Taipei, Taiwan
| | - Chiung-Mei Chen
- Department of Neurology, Chang Gung Memorial Hospital-Linkou Medical Center, Chang Gung University College of Medicine, Taoyuan, Taiwan
| | - Chin-Chang Huang
- Department of Neurology, Chang Gung Memorial Hospital-Linkou Medical Center, Chang Gung University College of Medicine, Taoyuan, Taiwan
| | - Guey-Jen Lee-Chen
- Department of Life Science, National Taiwan Normal University, Taipei, Taiwan
| | - Wenwei Lin
- Department of Chemistry, National Taiwan Normal University, Taipei, Taiwan
| | - Kuo-Hsuan Chang
- Department of Neurology, Chang Gung Memorial Hospital-Linkou Medical Center, Chang Gung University College of Medicine, Taoyuan, Taiwan
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Khan TA, Fornefeld T, Hübner D, Vana P, Tietze LF. Palladium-Catalyzed 4-Fold Domino Reaction for the Synthesis of a Polymeric Double Switch. Org Lett 2018; 20:2007-2010. [PMID: 29558155 DOI: 10.1021/acs.orglett.8b00553] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
A palladium-catalyzed 4-fold domino reaction consisting of two carbopalladation reactions and two C-H activation reactions, followed by the introduction of an acrylate moiety, led to the tetra-substituted helical alkene A2, using the dialkyne A3 as a substrate. The alkene was copolymerized with butyl acrylate by using the reversible addition-fragmentation chain transfer polymerization (RAFT) to give the desired polymeric switch A1.
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Affiliation(s)
- Taukeer A Khan
- Institute of Organic and Biomolecular Chemistry , Georg-August-University of Göttingen , Tammannstr. 2 , D-37077 Göttingen , Germany
| | - Torsten Fornefeld
- Institute of Physical Chemistry , Georg-August-University of Göttingen , Tammannstr. 6 , D-37077 Göttingen , Germany
| | - Dennis Hübner
- Institute of Physical Chemistry , Georg-August-University of Göttingen , Tammannstr. 6 , D-37077 Göttingen , Germany
| | - Philipp Vana
- Institute of Physical Chemistry , Georg-August-University of Göttingen , Tammannstr. 6 , D-37077 Göttingen , Germany
| | - Lutz F Tietze
- Institute of Organic and Biomolecular Chemistry , Georg-August-University of Göttingen , Tammannstr. 2 , D-37077 Göttingen , Germany
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Senthilkumar S, Valdomir G, Ganapathy D, Zhang Y, Tietze LF. Enantioselective Total Synthesis of the Fungal Metabolite Blennolide D and the Enantiomers of Blennolide E and F. Org Lett 2018; 20:2186-2189. [DOI: 10.1021/acs.orglett.8b00487] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Soundararasu Senthilkumar
- Institute of Organic and Biomolecular Chemistry, Georg-August University Göttingen, Tammannstrasse 2, 37077 Göttingen, Germany
| | - Guillermo Valdomir
- Institute of Organic and Biomolecular Chemistry, Georg-August University Göttingen, Tammannstrasse 2, 37077 Göttingen, Germany
| | - Dhandapani Ganapathy
- Institute of Organic and Biomolecular Chemistry, Georg-August University Göttingen, Tammannstrasse 2, 37077 Göttingen, Germany
| | - Yun Zhang
- Institute of Organic and Biomolecular Chemistry, Georg-August University Göttingen, Tammannstrasse 2, 37077 Göttingen, Germany
| | - Lutz F. Tietze
- Institute of Organic and Biomolecular Chemistry, Georg-August University Göttingen, Tammannstrasse 2, 37077 Göttingen, Germany
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18
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Desimoni G, Faita G, Quadrelli P. Forty Years after “Heterodiene Syntheses with α,β-Unsaturated Carbonyl Compounds”: Enantioselective Syntheses of 3,4-Dihydropyran Derivatives. Chem Rev 2018; 118:2080-2248. [DOI: 10.1021/acs.chemrev.7b00322] [Citation(s) in RCA: 76] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Giovanni Desimoni
- Department of Chemistry, University of Pavia, Viale Taramelli 10, 27100 Pavia, Italy
| | - Giuseppe Faita
- Department of Chemistry, University of Pavia, Viale Taramelli 10, 27100 Pavia, Italy
| | - Paolo Quadrelli
- Department of Chemistry, University of Pavia, Viale Taramelli 10, 27100 Pavia, Italy
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20
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Xiao Z, Li Y, Gao S. Total Synthesis and Structural Determination of the Dimeric Tetrahydroxanthone Ascherxanthone A. Org Lett 2017; 19:1834-1837. [DOI: 10.1021/acs.orglett.7b00592] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Zheming Xiao
- Shanghai Key Laboratory of
Green Chemistry and Chemical Processes, School of Chemistry and Molecular
Engineering, East China Normal University, 3663N Zhongshan Road, Shanghai 200062, China
| | - Yayue Li
- Shanghai Key Laboratory of
Green Chemistry and Chemical Processes, School of Chemistry and Molecular
Engineering, East China Normal University, 3663N Zhongshan Road, Shanghai 200062, China
| | - Shuanhu Gao
- Shanghai Key Laboratory of
Green Chemistry and Chemical Processes, School of Chemistry and Molecular
Engineering, East China Normal University, 3663N Zhongshan Road, Shanghai 200062, China
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21
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Ganapathy D, Reiner JR, Valdomir G, Senthilkumar S, Tietze LF. Enantioselective Total Synthesis and Structure Confirmation of the Natural Dimeric Tetrahydroxanthenone Dicerandrol C. Chemistry 2017; 23:2299-2302. [DOI: 10.1002/chem.201700020] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2017] [Indexed: 12/15/2022]
Affiliation(s)
- Dhandapani Ganapathy
- Institute of Organic and Biomolecular Chemistry; Georg-August University of Göttingen; Tammannstr. 2 37077 Göttingen Germany
| | - Johannes R. Reiner
- Institute of Organic and Biomolecular Chemistry; Georg-August University of Göttingen; Tammannstr. 2 37077 Göttingen Germany
| | - Guillermo Valdomir
- Institute of Organic and Biomolecular Chemistry; Georg-August University of Göttingen; Tammannstr. 2 37077 Göttingen Germany
| | - Soundararasu Senthilkumar
- Institute of Organic and Biomolecular Chemistry; Georg-August University of Göttingen; Tammannstr. 2 37077 Göttingen Germany
| | - Lutz F. Tietze
- Institute of Organic and Biomolecular Chemistry; Georg-August University of Göttingen; Tammannstr. 2 37077 Göttingen Germany
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Qin T, Iwata T, Ransom TT, Beutler JA, Porco JA. Syntheses of Dimeric Tetrahydroxanthones with Varied Linkages: Investigation of "Shapeshifting" Properties. J Am Chem Soc 2015; 137:15225-33. [PMID: 26544765 PMCID: PMC4863954 DOI: 10.1021/jacs.5b09825] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
The 2,4'- and 4,4'-linked variants of the cytotoxic agent secalonic acid A and their analogues have been synthesized. Kinetic resolution of an unprotected tetrahydroxanthone scaffold followed by copper-mediated biaryl coupling allowed for efficient access to these compounds. Evaluation of the "shapeshifting" properties of 2,2'-, 2,4'-, and 4,4'-linked variants of the secalonic acids A in a polar solvent in conjunction with assays of the compounds against select cancer cell lines was conducted to study possible correlations between linkage variation and cytotoxicity.
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Affiliation(s)
- Tian Qin
- Department of Chemistry and Center for Molecular Discovery (BU-CMD), Boston University, 590 Commonwealth Avenue, Boston, Massachusetts 02215, United States
| | - Takayuki Iwata
- Department of Chemistry and Center for Molecular Discovery (BU-CMD), Boston University, 590 Commonwealth Avenue, Boston, Massachusetts 02215, United States
| | - Tanya T. Ransom
- Molecular Targets Laboratory, Frederick National Laboratory for Cancer Research, National Cancer Institute, Frederick, Maryland 21702, United States
| | - John A. Beutler
- Molecular Targets Laboratory, Frederick National Laboratory for Cancer Research, National Cancer Institute, Frederick, Maryland 21702, United States
| | - John A. Porco
- Department of Chemistry and Center for Molecular Discovery (BU-CMD), Boston University, 590 Commonwealth Avenue, Boston, Massachusetts 02215, United States
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Lindner S, Nieger M, Bräse S. Stannylation and Stille Coupling of Base-Sensitive Tetrahydroxanthones to Heteromeric Biaryls. Adv Synth Catal 2015. [DOI: 10.1002/adsc.201500524] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Ganapathy D, Reiner JR, Löffler LE, Ma L, Gnanaprakasam B, Niepötter B, Koehne I, Tietze LF. Enantioselective Total Synthesis of Secalonic Acid E. Chemistry 2015; 21:16807-10. [DOI: 10.1002/chem.201503593] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2015] [Indexed: 11/10/2022]
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Liu K, Jiang X. Regioselective and Enantioselective Domino Aldol-Oxa-Michael Reactions to Construct Quaternary (Chroman) Stereocenters. European J Org Chem 2015. [DOI: 10.1002/ejoc.201501065] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Tietze LF, Waldecker B, Ganapathy D, Eichhorst C, Lenzer T, Oum K, Reichmann SO, Stalke D. Four- and Sixfold Tandem-Domino Reactions Leading to Dimeric Tetrasubstituted Alkenes Suitable as Molecular Switches. Angew Chem Int Ed Engl 2015; 54:10317-21. [DOI: 10.1002/anie.201503538] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2015] [Indexed: 01/17/2023]
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Tietze LF, Waldecker B, Ganapathy D, Eichhorst C, Lenzer T, Oum K, Reichmann SO, Stalke D. Vier- und sechsfache Tandem-Dominoreaktionen zur Synthese von dimeren tetrasubstituierten Alkenen als molekulare Doppelschalter. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201503538] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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Qin T, Skraba-Joiner SL, Khalil ZG, Johnson RP, Capon RJ, Porco JA. Atropselective syntheses of (-) and (+) rugulotrosin A utilizing point-to-axial chirality transfer. Nat Chem 2015; 7:234-40. [PMID: 25698333 PMCID: PMC4339264 DOI: 10.1038/nchem.2173] [Citation(s) in RCA: 69] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2014] [Accepted: 12/16/2014] [Indexed: 02/05/2023]
Abstract
Chiral, dimeric natural products containing complex structures and interesting biological properties have inspired chemists and biologists for decades. A seven step total synthesis of the axially chiral, dimeric tetrahydroxanthone natural product rugulotrosin A is described. The synthesis employs a one-pot Suzuki coupling/dimerization to generate the requisite 2,2'-linked biaryl linkage. Highly selective point-to-axial chirality transfer was achieved using palladium catalysis with achiral phosphine ligands. Single X-ray crystal diffraction data was obtained to confirm both the atropisomeric configuration and absolute stereochemistry of rugulotrosin A. Computational studies are described to rationalize the atropselectivity observed in the key dimerization step. Comparison of the crude fungal extract with synthetic rugulotros in A and its atropisomer verified that nature generates a single atropisomer of the natural product.
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Affiliation(s)
- Tian Qin
- Department of Chemistry and Center for Molecular Discovery (BU-CMD), Boston University, Boston, Massachusetts 02215, USA
| | - Sarah L Skraba-Joiner
- Department of Chemistry, University of New Hampshire, Durham, New Hampshire 03824, USA
| | - Zeinab G Khalil
- The University of Queensland, Institute of Molecular Bioscience, 306 Carmody Road, St Lucia, Queensland 4072, Australia
| | - Richard P Johnson
- Department of Chemistry, University of New Hampshire, Durham, New Hampshire 03824, USA
| | - Robert J Capon
- The University of Queensland, Institute of Molecular Bioscience, 306 Carmody Road, St Lucia, Queensland 4072, Australia
| | - John A Porco
- Department of Chemistry and Center for Molecular Discovery (BU-CMD), Boston University, Boston, Massachusetts 02215, USA
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Tietze LF, Eichhorst C, Hungerland T, Steinert M. A Fast Way to Fluorescence: A Fourfold Domino Reaction to Condensed Polycyclic Compounds. Chemistry 2014; 20:12553-8. [DOI: 10.1002/chem.201402961] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2014] [Indexed: 12/24/2022]
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30
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Meister AC, Encinas A, Sahin H, Singer EMC, Nising CF, Nieger M, Bräse S. Total Synthesis of Blennolide Mycotoxins: Design, Synthetic Routes and Completion. European J Org Chem 2014. [DOI: 10.1002/ejoc.201402083] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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31
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Tietze LF, Jackenkroll S, Hierold J, Ma L, Waldecker B. A Domino Approach to the Enantioselective Total Syntheses of Blennolide C and Gonytolide C. Chemistry 2014; 20:8628-35. [DOI: 10.1002/chem.201402495] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2014] [Indexed: 01/07/2023]
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Wezeman T, Masters KS, Bräse S. Doppelt genäht hält besser - die Kunst der Synthese chiraler dimerer Naturstoffe. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201402384] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Wezeman T, Masters KS, Bräse S. Double trouble--the art of synthesis of chiral dimeric natural products. Angew Chem Int Ed Engl 2014; 53:4524-6. [PMID: 24700517 DOI: 10.1002/anie.201402384] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2014] [Indexed: 11/08/2022]
Abstract
Double or nothing! Recently the total synthesis of secalonic acids A and D was reported. This work and other natural product syntheses with a dimerization step as a common feature are featured in this Highlight. The significant biological activity of the secalonic acids and the fact that their synthesis has fascinated synthetic chemists for the past forty years make this work a milestone in natural product synthesis.
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Affiliation(s)
- Tim Wezeman
- Institute of Organic Chemistry (IOC), Karlsruhe Institute of Technology (KIT), Fritz-Haber-Weg 6, 76131 Karlsruhe (Germany)
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Abstract
Total syntheses of the dimeric tetrahydroxanthone natural products secalonic acids A and D are described. Key steps involve kinetic resolution of the tetrahydroxanthone core structure using homobenzotetramisole catalysis and late-stage copper(I)-mediated homodimerization of complex aryl stannane monomers.
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Affiliation(s)
- Tian Qin
- Department of Chemistry and Center for Chemical Methodology and Library Development (CMLD-BU), Boston University, 590 Commonwealth Avenue, Boston, MA 02215 (USA)
| | - John A. Porco
- Department of Chemistry and Center for Chemical Methodology and Library Development (CMLD-BU), Boston University, 590 Commonwealth Avenue, Boston, MA 02215 (USA)
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Masters KS, Bihlmeier A, Klopper W, Bräse S. Tethering for Selective Synthesis of 2,2′-Biphenols: The Acetal Method. Chemistry 2013; 19:17827-35. [DOI: 10.1002/chem.201301969] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2013] [Indexed: 01/11/2023]
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37
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Meister AC, Sauter PF, Bräse S. A Stereoselective Approach to Functionalized Cyclohexenones. European J Org Chem 2013. [DOI: 10.1002/ejoc.201300752] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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