1
|
Basu P, Satam N, Pati S, Suresh A, Namboothiri INN. Reactions of Sulfonylphthalide with Diverse Activated Imines for the Synthesis of Enaminophthalides, Spiro-isoquinolinones, and Homalicine Natural Products. J Org Chem 2022; 88:4038-4051. [PMID: 35797456 DOI: 10.1021/acs.joc.2c00816] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The reactivity of the Hauser-Kraus (H-K) donor, 3-sulfonylphthalide, with various activated imines under basic conditions is demonstrated. The reaction of 3-sulfonylphthalide with Boc-protected aldimine provides a rapid access to 1,2-imine adducts and alkylidenephthalides depending upon the stoichiometry of the base. The alkylidenephthalides could be transformed to ketophthalides, a new class of phthalides, on acid hydrolysis, which upon reductive cyclization using Zn/AcOH afforded the natural product homalicine. On the contrary, the Boc-protected isatinimines undergo an efficient H-K annulation to provide spiro-isoquinolinone-oxindoles in excellent yields. However, the corresponding conjugated ketimines afforded Michael adducts, which were converted to the corresponding alkylidenephthalides under TBAF conditions.
Collapse
Affiliation(s)
- Pallabita Basu
- Indian Institute of Technology Bombay, Mumbai 400 076, Maharashtra, India
| | - Nishikant Satam
- Indian Institute of Technology Bombay, Mumbai 400 076, Maharashtra, India
| | - Soumyaranjan Pati
- Indian Institute of Technology Bombay, Mumbai 400 076, Maharashtra, India
| | - Alati Suresh
- Indian Institute of Technology Bombay, Mumbai 400 076, Maharashtra, India
| | | |
Collapse
|
2
|
Xiong Q, Lu J, Shi L, Ran GY. Pd-Catalyzed Tandem [5 + 2] Cycloaddition/Ring Contraction of Phthalide-Derived Alkenes and Vinylethylene Carbonates for the Construction of Benzo-[5,5]-spiroketal Lactones. Org Lett 2022; 24:3363-3367. [DOI: 10.1021/acs.orglett.2c01114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Qiang Xiong
- Department of Medicinal Chemistry, College of Pharmacy, Chongqing Medical University, Chongqing 400016, China
| | - Ji Lu
- College of Pharmacy, Southwest Medical University, Luzhou 646000, China
| | - Liu Shi
- Department of Medicinal Chemistry, College of Pharmacy, Chongqing Medical University, Chongqing 400016, China
| | - Guang-Yao Ran
- Department of Medicinal Chemistry, College of Pharmacy, Chongqing Medical University, Chongqing 400016, China
| |
Collapse
|
3
|
Vinylogous and Arylogous Stereoselective Base-Promoted Phase-Transfer Catalysis. Catalysts 2021. [DOI: 10.3390/catal11121545] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Vinylogous enolate and enolate-type carbanions, generated by deprotonation of α,β-unsaturated compounds and characterized by delocalization of the negative charge over two or more carbon atoms, are extensively used in organic synthesis, enabling functionalization and C–C bond formation at remote positions. Similarly, reactions with electrophiles at benzylic and heterobenzylic position are performed through generation of arylogous and heteroarylogous enolate-type nucleophiles. Although widely exploited in metal-catalysis and organocatalysis, it is only in recent years that the vinylogy and arylogy principles have been translated fruitfully in phase-transfer catalyzed processes. This review provides an overview of the methods developed to date, involving vinylogous and (hetero)arylogous carbon nucleophiles under phase-transfer catalytic conditions, highlighting main mechanistic aspects.
Collapse
|
4
|
Christoffers J, Kieslich D. Cyanide Anions as Nucleophilic Catalysts in Organic Synthesis. SYNTHESIS-STUTTGART 2021. [DOI: 10.1055/a-1499-8943] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
AbstractThe nucleophilic addition of a cyanide anion to a carbonyl group is the basis for several cyanide-catalyzed organic reactions, which are summarized in this review. Since cyanide is also a good leaving group, it is an excellent catalyst for transacylation reactions. As an electron-withdrawing group, it also stabilizes a negative charge in its α-position, thus allowing the umpolung of aldehydes to formyl anion equivalents. The two leading examples are the benzoin condensation and the Michael–Stetter reaction furnishing α-hydroxy ketones and 1,4-dicarbonyl compounds, which are both catalyzed by cyanides. The review also covers variants like the silyl-benzoin coupling, the aldimine coupling and the imino-Stetter reaction. Moreover, some cyanide-catalyzed heterocyclic syntheses are reviewed.1 Introduction2 Nucleophilic Additions2.1 Cyanohydrin Formation2.2 Corey–Gilman–Ganem and Related Oxidation Reactions2.3 Conjugate Addition2.4 Intramolecular Carbocyanation3 Transacylation Reactions3.1 Ester Hydrolysis and Transesterification3.2 Formation of Amides3.3 Ketones from Esters3.4 Esters from Ketones4 Transformations Involving an Umpolung4.1 Benzoin Condensation4.2 Aldimine Coupling4.3 Michael–Stetter Reaction4.4 Imino-Stetter Reaction5 Formation of Heterocycles5.1 Oxazolines from Isocyanoacetates5.2 Imidazoles from TosMIC via Oxazolines5.3 Bargellini Reaction6 Conclusion
Collapse
|
5
|
Xu SY, Zhang R, Zhang SS, Feng CG. Enantioselective synthesis of 3-aryl-phthalides through a nickel-catalyzed stereoconvergent cross-coupling reaction. Org Biomol Chem 2021; 19:4492-4496. [PMID: 33960992 DOI: 10.1039/d1ob00487e] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
A nickel-catalyzed asymmetric Suzuki-Miyaura cross-coupling of racemic 3-bromo-phthalides and arylboronic acids was realized for the synthesis of diverse chiral 3-aryl-phthalides in moderate to excellent reaction yields. The reaction proceeded in a stereoconvergent manner and high enantioselectivities were observed for most examined examples. A number of functional groups like aldehyde, ester and bromide were well tolerated. Heteroaromatic boronic acids were also competent coupling partners in this reaction.
Collapse
Affiliation(s)
- Si-Yu Xu
- The Research Center of Chiral Drugs, Innovation Research Institute of Traditional Chinese Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China.
| | - Rui Zhang
- The Research Center of Chiral Drugs, Innovation Research Institute of Traditional Chinese Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China.
| | - Shu-Sheng Zhang
- The Research Center of Chiral Drugs, Innovation Research Institute of Traditional Chinese Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China.
| | - Chen-Guo Feng
- The Research Center of Chiral Drugs, Innovation Research Institute of Traditional Chinese Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China. and CAS Key Laboratory of Synthetic Chemistry of Natural Substances, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, China and Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, Shanghai Jiao Tong University, Shanghai, 200240, China
| |
Collapse
|
6
|
Sicignano M, Schettini R, Pierri G, Marino ML, Izzo I, De Riccardis F, Bernardi L, Sala GD. An Entry to Enantioenriched 3,3-Disubstituted Phthalides through Asymmetric Phase-Transfer-Catalyzed γ-Alkylation. J Org Chem 2020; 85:7476-7484. [PMID: 32403930 PMCID: PMC8007094 DOI: 10.1021/acs.joc.0c00880] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Indexed: 12/04/2022]
Abstract
A novel asymmetric phase-transfer-catalyzed γ-alkylation of phthalide 3-carboxylic esters has been developed, giving access to 3,3-disubstituted phthalide derivatives, which present a chiral quaternary γ-carbon in good to excellent yields and good enantioselectivities (74-88% ee). The enantiomeric purity could be substantially enhanced to 94-95% ee by recrystallization. Both electron-withdrawing and electron-releasing substituents are well tolerated on the phthalide core as well as on the aromatic moiety of the alkylating agent. This methodology, enabling the introduction of an unfunctionalized group at the phthalide γ-position, fully complements previously reported organocatalytic strategies involving functionalized electrophiles, thus expanding the scope of accessible 3,3-disubstituted products. The high synthetic value of this asymmetric reaction has been proven by the formal synthesis of the naturally occurring alkaloid (+)-(9S,13R)-13-hydroxyisocyclocelabenzine.
Collapse
Affiliation(s)
- Marina Sicignano
- Dipartimento
di Chimica e Biologia “A. Zambelli”, Universitá degli Studi di Salerno, Via Giovanni Paolo II 132, 84084 Fisciano, SA, Italy
| | - Rosaria Schettini
- Dipartimento
di Chimica e Biologia “A. Zambelli”, Universitá degli Studi di Salerno, Via Giovanni Paolo II 132, 84084 Fisciano, SA, Italy
| | - Giovanni Pierri
- Dipartimento
di Chimica e Biologia “A. Zambelli”, Universitá degli Studi di Salerno, Via Giovanni Paolo II 132, 84084 Fisciano, SA, Italy
| | - Maria Leda Marino
- Dipartimento
di Chimica e Biologia “A. Zambelli”, Universitá degli Studi di Salerno, Via Giovanni Paolo II 132, 84084 Fisciano, SA, Italy
| | - Irene Izzo
- Dipartimento
di Chimica e Biologia “A. Zambelli”, Universitá degli Studi di Salerno, Via Giovanni Paolo II 132, 84084 Fisciano, SA, Italy
| | - Francesco De Riccardis
- Dipartimento
di Chimica e Biologia “A. Zambelli”, Universitá degli Studi di Salerno, Via Giovanni Paolo II 132, 84084 Fisciano, SA, Italy
| | - Luca Bernardi
- Department
of Industrial Chemistry “Toso Montanari” & INSTM
RU Bologna, Alma Mater Studiorum University
of Bologna, Viale del
Risorgimento 4, 40136 Bologna, Italy
| | - Giorgio Della Sala
- Dipartimento
di Chimica e Biologia “A. Zambelli”, Universitá degli Studi di Salerno, Via Giovanni Paolo II 132, 84084 Fisciano, SA, Italy
| |
Collapse
|
7
|
Awasthi A, Singh M, Rathee G, Chandra R. Recent advancements in synthetic methodologies of 3-substituted phthalides and their application in the total synthesis of biologically active natural products. RSC Adv 2020; 10:12626-12652. [PMID: 35497626 PMCID: PMC9051324 DOI: 10.1039/d0ra00701c] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Accepted: 03/06/2020] [Indexed: 01/19/2023] Open
Abstract
We have provided a critical review that focuses on key developments in the area of 3-substituted phthalides and their role in the development of important biologically active natural products. 3-Substituted phthalides are vital molecules owing to their fascinating biological activity. The scope, isolation, and characterization of various naturally occurring racemic and chiral 3-substituted phthalides have been covered. We have put significant emphasis on recently developed research methodologies for the synthesis of racemic and chiral 3-substituted phthalides. These newer approaches are essential for the development of newer and elegant strategies for the synthesis of phthalide-based or similar molecular architecture with broader substrate scope and higher stereoselectivities. Also, we have discussed the application of 3-substituted phthalides as a precursor for the synthesis of natural products and their analogs. We have provided contextual information on the chemistry of 3-substituted phthalides and their significance in natural product synthesis.![]()
Collapse
Affiliation(s)
- Amardeep Awasthi
- Drug Discovery and Development Laboratory
- Department of Chemistry
- University of Delhi
- Delhi-110007
- India
| | - Mandeep Singh
- Drug Discovery and Development Laboratory
- Department of Chemistry
- University of Delhi
- Delhi-110007
- India
| | - Garima Rathee
- Drug Discovery and Development Laboratory
- Department of Chemistry
- University of Delhi
- Delhi-110007
- India
| | - Ramesh Chandra
- Drug Discovery and Development Laboratory
- Department of Chemistry
- University of Delhi
- Delhi-110007
- India
| |
Collapse
|
8
|
Wang J, Li X, Cheng JP. Quinine-derived thiourea promoted enantioselective Michael addition reactions of 3-substituted phthalides to maleimides. Sci China Chem 2019. [DOI: 10.1007/s11426-018-9393-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
|
9
|
Affiliation(s)
- Huanzhen Ni
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, 117543 Singapore
| | - Wai-Lun Chan
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, 117543 Singapore
| | - Yixin Lu
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, 117543 Singapore
| |
Collapse
|
10
|
Faderl C, Budde S, Kachkovskyi G, Rackl D, Reiser O. Visible Light-Mediated Decarboxylation Rearrangement Cascade of ω-Aryl-N-(acyloxy)phthalimides. J Org Chem 2018; 83:12192-12206. [DOI: 10.1021/acs.joc.8b01538] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Christian Faderl
- Institut für Organische Chemie, Universität Regensburg, Universitätsstrasse 31, 93053 Regensburg, Germany
| | - Simon Budde
- Institut für Organische Chemie, Universität Regensburg, Universitätsstrasse 31, 93053 Regensburg, Germany
| | - Georgiy Kachkovskyi
- Institut für Organische Chemie, Universität Regensburg, Universitätsstrasse 31, 93053 Regensburg, Germany
| | - Daniel Rackl
- Institut für Organische Chemie, Universität Regensburg, Universitätsstrasse 31, 93053 Regensburg, Germany
| | - Oliver Reiser
- Institut für Organische Chemie, Universität Regensburg, Universitätsstrasse 31, 93053 Regensburg, Germany
| |
Collapse
|
11
|
Hong KB, Kim D, Kim BK, Woo SY, Lee JH, Han SH, Bae GU, Kang S. CF₃-Substituted Mollugin 2-(4-Morpholinyl)-ethyl ester as a Potential Anti-inflammatory Agent with Improved Aqueous Solubility and Metabolic Stability. Molecules 2018; 23:E2030. [PMID: 30110934 PMCID: PMC6222789 DOI: 10.3390/molecules23082030] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2018] [Revised: 08/08/2018] [Accepted: 08/13/2018] [Indexed: 12/14/2022] Open
Abstract
Although mollugin, the main ingredient of the oriental medicinal herb Rubia cordifolia, has considerable anti-inflammatory effects, it has poor aqueous solubility as well as poor metabolic and plasma stability. To overcome these shortfalls, various mollugin derivatives have been synthesized and evaluated for their ability to inhibit U937 monocyte cell adhesion to HT-29 colonic epithelial cells in TNF-α- or IL-6-induced models of colon inflammation. The 2-(4-morpholinyl)-ethyl ester of CF3-substituted mollugin (compound 15c) showed good water solubility, improved metabolic and plasma stability, and greater inhibitory activity than mesalazine in both the TNF-α- and IL-6-induced colonic epithelial cell adhesion assays, suggesting that 15c is a potential anti-inflammatory agent.
Collapse
Affiliation(s)
- Ki Bum Hong
- New Drug Development Center, Daegu-Gyeongbuk Medical Innovation Foundation (DGMIF), Daegu 41061, Korea.
| | - Darong Kim
- New Drug Development Center, Daegu-Gyeongbuk Medical Innovation Foundation (DGMIF), Daegu 41061, Korea.
| | - Bo-Kyung Kim
- New Drug Development Center, Daegu-Gyeongbuk Medical Innovation Foundation (DGMIF), Daegu 41061, Korea.
| | - Seo Yeon Woo
- New Drug Development Center, Daegu-Gyeongbuk Medical Innovation Foundation (DGMIF), Daegu 41061, Korea.
| | - Ji Hoon Lee
- New Drug Development Center, Daegu-Gyeongbuk Medical Innovation Foundation (DGMIF), Daegu 41061, Korea.
| | - Seung-Hee Han
- Central Research Laboratory, KOREA PHARMA Co. Ltd., jeyakgongdan 3-gil, Hyangnam-eup, Hwaseong-si, Gyeonggi-do 18622, Korea.
| | - Gyu-Un Bae
- Research Center for Cell Fate Control, College of Pharmacy, Sookmyung Women's University, Seoul 03760, Korea.
| | - Soosung Kang
- New Drug Development Center, Daegu-Gyeongbuk Medical Innovation Foundation (DGMIF), Daegu 41061, Korea.
- College of Pharmacy and Graduate School of Pharmaceutical Sciences, Ewha Womans University, Seoul 03760, Korea.
| |
Collapse
|
12
|
Liu W, Hu ZP, Yan Y, Liao WW. Highly diastereo- and enantioselective construction of phthalide-oxindole hybrids bearing vicinal quaternary chiral centers via an organocatalytic allylic alkylation. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2018.07.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
13
|
Du ST, Sun Z, Liu W, Liao WW. Lewis Base-Catalyzed One-Pot Cascade Sequences of O-Alkenyl-Substituted Cyanohydrins: Diastereoselective Synthesis of Multisubstituted Dihydrofurans. Org Lett 2017; 19:6598-6601. [PMID: 29182288 DOI: 10.1021/acs.orglett.7b03301] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The first example of the diastereoselective construction of polysubstituted 2,3-dihydrofurans incorporating contiguous quaternary and tertiary carbon centers via a Lewis base-catalyzed one-pot cascade sequence is described. The diversity and complexity of the final products can be efficiently constructed with high diastereoselectivities via this catalytic multistep process under mild reaction conditions.
Collapse
Affiliation(s)
- Shan-Tao Du
- College of Chemistry, Jilin University , 2699 Qianjin Street, Changchun 130012, China
| | - Zhen Sun
- College of Chemistry, Jilin University , 2699 Qianjin Street, Changchun 130012, China
| | - Wei Liu
- College of Chemistry, Jilin University , 2699 Qianjin Street, Changchun 130012, China
| | - Wei-Wei Liao
- College of Chemistry, Jilin University , 2699 Qianjin Street, Changchun 130012, China
| |
Collapse
|
14
|
Wang W, Wang Y, Zheng L, Qiao Y, Wei D. A DFT Study on Mechanisms and Origin of Selectivity of Phosphine-Catalyzed Vicinal Acylcyanation of Alkynoates. ChemistrySelect 2017. [DOI: 10.1002/slct.201700996] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Wei Wang
- The College of Chemistry and Molecular Engineering, Center of Computational Chemistry; Zhengzhou University; Zhengzhou, Henan Province 450001 P. R. China
| | - Yang Wang
- The College of Chemistry and Molecular Engineering, Center of Computational Chemistry; Zhengzhou University; Zhengzhou, Henan Province 450001 P. R. China
| | - Linjie Zheng
- The College of Chemistry and Molecular Engineering, Center of Computational Chemistry; Zhengzhou University; Zhengzhou, Henan Province 450001 P. R. China
| | - Yan Qiao
- Department of Pathophysiology, School of Basic Medical Sciences; Zhengzhou University; Zhengzhou, Henan Province 450001 P. R. China
| | - Donghui Wei
- The College of Chemistry and Molecular Engineering, Center of Computational Chemistry; Zhengzhou University; Zhengzhou, Henan Province 450001 P. R. China
| |
Collapse
|
15
|
Ghosh B, Chakraborty S, Mal D. TMSCN-PhI(OAc)2Promoted Synthesis of 3-Cyanophthalides from Phthalaldehydic Acids. ChemistrySelect 2016. [DOI: 10.1002/slct.201600755] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Bidhan Ghosh
- Department of Chemistry; Indian Institute of Technology Kharagpur; Kharagpur 721302 India
| | - Soumen Chakraborty
- Department of Chemistry; Indian Institute of Technology Kharagpur; Kharagpur 721302 India
| | - Dipakranjan Mal
- Department of Chemistry; Indian Institute of Technology Kharagpur; Kharagpur 721302 India
| |
Collapse
|
16
|
Xu QQ, Hou QL, Liu W, Wang HJ, Liao WW. Copper-Promoted Cyclization of α-Amino Nitrile-Tethered Enynes: Controllable Synthesis of 3-Azabicyclo[4.1.0]hepta-2,4-dienes and 4,5-Dihydro-3H-azepines. Org Lett 2016; 18:3854-7. [DOI: 10.1021/acs.orglett.6b01864] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Qiu-Qin Xu
- College of Chemistry and ‡College of Life
Science, Jilin University, 2699
Qianjin Street, Changchun 130012, China
| | - Qi-Lan Hou
- College of Chemistry and ‡College of Life
Science, Jilin University, 2699
Qianjin Street, Changchun 130012, China
| | - Wei Liu
- College of Chemistry and ‡College of Life
Science, Jilin University, 2699
Qianjin Street, Changchun 130012, China
| | - Hai-Jing Wang
- College of Chemistry and ‡College of Life
Science, Jilin University, 2699
Qianjin Street, Changchun 130012, China
| | - Wei-Wei Liao
- College of Chemistry and ‡College of Life
Science, Jilin University, 2699
Qianjin Street, Changchun 130012, China
| |
Collapse
|
17
|
Zhao MN, Yu L, Hui RR, Ren ZH, Wang YY, Guan ZH. Iron-Catalyzed Dehydrogenative [4 + 2] Cycloaddition of Tertiary Anilines and Enamides for the Synthesis of Tetrahydroquinolines with Amido-Substituted Quaternary Carbon Centers. ACS Catal 2016. [DOI: 10.1021/acscatal.6b00849] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Mi-Na Zhao
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, Department of Chemistry & Materials Science, Northwest University, Xi’an 710127, P. R. China
| | - Le Yu
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, Department of Chemistry & Materials Science, Northwest University, Xi’an 710127, P. R. China
| | - Rong-Rong Hui
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, Department of Chemistry & Materials Science, Northwest University, Xi’an 710127, P. R. China
| | - Zhi-Hui Ren
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, Department of Chemistry & Materials Science, Northwest University, Xi’an 710127, P. R. China
| | - Yao-Yu Wang
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, Department of Chemistry & Materials Science, Northwest University, Xi’an 710127, P. R. China
| | - Zheng-Hui Guan
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, Department of Chemistry & Materials Science, Northwest University, Xi’an 710127, P. R. China
| |
Collapse
|
18
|
Murayama H, Nagao K, Ohmiya H, Sawamura M. Phosphine-Catalyzed Vicinal Acylcyanation of Alkynoates. Org Lett 2016; 18:1706-9. [DOI: 10.1021/acs.orglett.6b00677] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hiroaki Murayama
- Department of Chemistry,
Faculty of Science, Hokkaido University, Sapporo 060-0810, Japan
| | - Kazunori Nagao
- Department of Chemistry,
Faculty of Science, Hokkaido University, Sapporo 060-0810, Japan
| | - Hirohisa Ohmiya
- Department of Chemistry,
Faculty of Science, Hokkaido University, Sapporo 060-0810, Japan
| | - Masaya Sawamura
- Department of Chemistry,
Faculty of Science, Hokkaido University, Sapporo 060-0810, Japan
| |
Collapse
|
19
|
Roy J, Mal T, Jana S, Mal D. Regiodefined synthesis of brominated hydroxyanthraquinones related to proisocrinins. Beilstein J Org Chem 2016; 12:531-6. [PMID: 27340445 PMCID: PMC4901998 DOI: 10.3762/bjoc.12.52] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2015] [Accepted: 02/26/2016] [Indexed: 11/23/2022] Open
Abstract
Dibromobenzoisofuranone 12, synthesized in six steps, was regiospecifically annulated with 5-substituted cyclohexenones 13/36 in the presence of LiOt-Bu to give brominated anthraquinones 14/38 in good yields. Darzens condensation of 30 was shown to give chain-elongated anthraquinone 32. Alkaline hydrolysis of 38 furnished 39 representing desulfoproisocrinin F.
Collapse
Affiliation(s)
- Joyeeta Roy
- Department of Chemistry, Indian Institute of Technology, Kharagpur- 721302, India
| | - Tanushree Mal
- Department of Chemistry, Indian Institute of Technology, Kharagpur- 721302, India
| | - Supriti Jana
- Department of Chemistry, Indian Institute of Technology, Kharagpur- 721302, India
| | - Dipakranjan Mal
- Department of Chemistry, Indian Institute of Technology, Kharagpur- 721302, India
| |
Collapse
|
20
|
Hauser annulation of furoindolones in the synthesis of carbazole-1,4-quinones and benzo[b]carbazoloquinones. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.09.081] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
21
|
Huang JK, Yang Lauderdale TL, Shia KS. Studies on Antibiotics Active against Resistant Bacteria. Total Synthesis of MRSA-Active Tetarimycin A and Its Analogues. Org Lett 2015; 17:4248-51. [PMID: 26273719 DOI: 10.1021/acs.orglett.5b02039] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Making use of the Hauser-Kraus annulation as a key step, the first total synthesis of tetarimycin A has been accomplished in a highly convergent and operationally simple manner. Preliminary SAR not only validated that tetarimycin A exhibited potent activity against MRSA and VRE at a low MIC value but also identified that the hydroxyl group at C-10 was essential for antibacterial activities.
Collapse
Affiliation(s)
- Jing-Kai Huang
- Institute of Biotechnology and Pharmaceutical Research and ‡National Institute of Infectious Diseases and Vaccinology, National Health Research Institutes , Miaoli County 35053, Taiwan, R.O.C
| | - Tsai-Ling Yang Lauderdale
- Institute of Biotechnology and Pharmaceutical Research and ‡National Institute of Infectious Diseases and Vaccinology, National Health Research Institutes , Miaoli County 35053, Taiwan, R.O.C
| | - Kak-Shan Shia
- Institute of Biotechnology and Pharmaceutical Research and ‡National Institute of Infectious Diseases and Vaccinology, National Health Research Institutes , Miaoli County 35053, Taiwan, R.O.C
| |
Collapse
|
22
|
Hu ZP, Zhuang Z, Liao WW. Asymmetric Synthesis of Dihydronaphthoquinones Containing Adjacent Stereocenters via a Sulfa-Michael Addition Triggered Ring-Expansion Approach. J Org Chem 2015; 80:4627-37. [PMID: 25871849 DOI: 10.1021/acs.joc.5b00502] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A novel asymmetric synthetic approach for the construction of enantioenriched functionalized dihydroquinones incorporating adjacent quaternary and tertiary stereocenters has been reported, in which enantioenriched 3-allylic phthalides engaged in an unprecedented sulfa-Michael addition-triggered stereoselective ring-expansion reaction, and furnished the desired sulfur-incoporated dihydronaphthoquinones with high stereoselectivity.
Collapse
Affiliation(s)
- Zhi-Peng Hu
- Department of Organic Chemistry, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, China
| | - Zhe Zhuang
- Department of Organic Chemistry, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, China
| | - Wei-Wei Liao
- Department of Organic Chemistry, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, China
| |
Collapse
|