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Fernández S, Allegue D, Santamaría J, Ballesteros A. Diastereoselective and Synergistic Gold‐Catalyzed Bispropargylation of Xanthones and Thioxanthones: An Access to Xanthene Derivatives. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202200526] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Guo LD, Chen Y, Xu J. Total Synthesis of Daphniphyllum Alkaloids: From Bicycles to Diversified Caged Structures. Acc Chem Res 2020; 53:2726-2737. [PMID: 33074659 DOI: 10.1021/acs.accounts.0c00532] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Native to the Asia-Pacific region and widely applied in traditional Chinese medicine, the genus Daphniphyllum has produced over 330 known Daphniphyllum alkaloids. Investigations into these alkaloids have shown an exceptional range of interesting bioactivities. Challenging and caged polycyclic architectures and the promising biological profiles make Daphniphyllum alkaloids intriguing synthetic targets. Based on their backbones, these alkaloids can be categorized into 13-35 structurally distinct subfamilies. In addition to our work, almost 30 impressive total syntheses of Daphniphyllum alkaloids from seven subfamilies, namely, daphniphylline-type, secodaphniphylline-type, daphnilactone A-type, bukittinggine-type, daphmanidin A-type, calyciphylline A-type, and calyciphylline B-type alkaloids, have been reported by 11 research groups. However, many Daphniphyllum alkaloid subfamilies remain inaccessible by chemical synthesis.In this Account, we summarize our recent endeavors in the total synthesis of Daphniphyllum alkaloids commencing from simple chiral bicyclic synthons. Daphniphyllum alkaloids with diversified skeletons from four different subfamilies, namely, calyciphylline A-type, daphnezomine A-type, bukittinggine-type, and yuzurimine-type alkaloids, have been achieved. Furthermore, the tricyclic core structure of daphniglaucin C-type alkaloids daphnimacropodines was also synthesized. First, we describe a 14-step synthesis of calyciphylline A-type alkaloid (-)-himalensine A, which features a mild Cu-mediated nitrile hydration, an intramolecular Heck reaction to assemble the pivotal 2-azabicyclo[3.3.1]nonane moiety, and a Meinwald rearrangement to introduce the critical oxidative state into the skeleton. We then introduce the synthesis of daphnezomine A-type alkaloid dapholdhamine B, which possesses a unique aza-adamantane core. This target molecule was fabricated using key reactions including Huang's amide-activation-annulation. An unexpected radical detosylation during the synthesis of dapholdhamine B further inspired an ambitious radical cyclization cascade strategy, which eventually led to an efficient total synthesis of bukittinggine-type alkaloid (-)-caldaphnidine O. This highly chemo-, regio-, and stereoselective radical reaction cascade also shed light on the synthetic strategy of other alkaloids with caged structures. We next describe the first total synthesis of yuzurimine-type alkaloid (+)-caldaphnidine J. The key steps in our approach include a Pd-catalyzed regioselective hydroformylation and a novel Swern oxidation/ketene dithioacetal Prins reaction cascade. The work has achieved the first synthesis of a member of the largest subfamily of Daphniphyllum alkaloids. Finally, we show our efforts toward the total synthesis of daphniglaucin C-type alkaloids. Overall, we hope that the interesting strategies and synthetic methods demonstrated in our efforts could inspire a wide variety of additional applications to natural product synthesis.
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Affiliation(s)
- Lian-Dong Guo
- Department of Chemistry and Shenzhen Grubbs Institute and Guangdong Provincial Key Laboratory of Catalysis and Shenzhen Key Laboratory of Small Molecule Drug Discovery and Synthesis, Southern University of Science and Technology, Shenzhen 518055, China
| | - Yuye Chen
- Department of Chemistry and Shenzhen Grubbs Institute and Guangdong Provincial Key Laboratory of Catalysis and Shenzhen Key Laboratory of Small Molecule Drug Discovery and Synthesis, Southern University of Science and Technology, Shenzhen 518055, China
| | - Jing Xu
- Department of Chemistry and Shenzhen Grubbs Institute and Guangdong Provincial Key Laboratory of Catalysis and Shenzhen Key Laboratory of Small Molecule Drug Discovery and Synthesis, Southern University of Science and Technology, Shenzhen 518055, China
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Guo LD, Zhang Y, Hu J, Ning C, Fu H, Chen Y, Xu J. Asymmetric total synthesis of yuzurimine-type Daphniphyllum alkaloid (+)-caldaphnidine J. Nat Commun 2020; 11:3538. [PMID: 32669587 PMCID: PMC7363893 DOI: 10.1038/s41467-020-17350-x] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2020] [Accepted: 06/22/2020] [Indexed: 11/21/2022] Open
Abstract
Ever since Hirata’s report of yuzurimine in 1966, nearly fifty yuzurimine-type alkaloids have been isolated, which formed the largest subfamily of the Daphniphyllum alkaloids. Despite extensive synthetic studies towards this synthetically challenging and biologically intriguing family, no total synthesis of any yuzurimine-type alkaloids has been achieved to date. Here, the first enantioselective total synthesis of (+)-caldaphnidine J, a highly complex yuzurimine-type Daphniphyllum alkaloid, is described. Key transformations of this approach include a highly regioselective Pd-catalyzed hydroformylation, a samarium(II)-mediated pinacol coupling, and a one-pot Swern oxidation/ketene dithioacetal Prins reaction. Our approach paves the way for the synthesis of other yuzurimine-type alkaloids and related natural products. Despite being known for more than 50 years, yuzurimine-type alkaloids have not been accessed by total synthesis. Here, the authors report the first enantioselective total synthesis of (+)-Caldaphnidine J, a highly complex yuzurimine-type Daphniphyllum alkaloid.
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Affiliation(s)
- Lian-Dong Guo
- Shenzhen Grubbs Institute and Department of Chemistry and Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, 518055, Shenzhen, China
| | - Yan Zhang
- Shenzhen Grubbs Institute and Department of Chemistry and Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, 518055, Shenzhen, China
| | - Jingping Hu
- Shenzhen Grubbs Institute and Department of Chemistry and Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, 518055, Shenzhen, China
| | - Chengqing Ning
- Shenzhen Grubbs Institute and Department of Chemistry and Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, 518055, Shenzhen, China
| | - Heyifei Fu
- Shenzhen Grubbs Institute and Department of Chemistry and Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, 518055, Shenzhen, China
| | - Yuye Chen
- Shenzhen Grubbs Institute and Department of Chemistry and Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, 518055, Shenzhen, China
| | - Jing Xu
- Shenzhen Grubbs Institute and Department of Chemistry and Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, 518055, Shenzhen, China.
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Liu C, Taheri A, Lai B, Gu Y. Synergistic catalysis-induced ring-opening reactions of 2-substituted 3,4-dihydropyrans with α-oxoketene dithioacetals. Catal Sci Technol 2015. [DOI: 10.1039/c4cy01212g] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Synergistic catalysis enables ring-opening reactions of 2-substituted 3,4-dihydropyrans with α-oxoketene dithioacetals to proceed very well.
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Affiliation(s)
- Changhui Liu
- Key Laboratory for Large-Format Battery
- Materials and System
- Ministry of Education
- School of Chemistry and Chemical Engineering
- Huazhong University of Science and Technology (HUST)
| | - Amir Taheri
- Key Laboratory for Large-Format Battery
- Materials and System
- Ministry of Education
- School of Chemistry and Chemical Engineering
- Huazhong University of Science and Technology (HUST)
| | - Bingbing Lai
- Key Laboratory for Large-Format Battery
- Materials and System
- Ministry of Education
- School of Chemistry and Chemical Engineering
- Huazhong University of Science and Technology (HUST)
| | - Yanlong Gu
- Key Laboratory for Large-Format Battery
- Materials and System
- Ministry of Education
- School of Chemistry and Chemical Engineering
- Huazhong University of Science and Technology (HUST)
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Jung N, Stanek B, Gräßle S, Nieger M, Bräse S. Reactions of Resin-Bound Triazenes with Dithianylium Tetrafluoroborates: Efficient Synthesis of α-Azo Ketene Dithioacetals and Related Hydrazones. Org Lett 2014; 16:1112-5. [DOI: 10.1021/ol4037133] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Nicole Jung
- Karlsruhe Institute of Technology, Campus North , Hermann-von-Helmholtz Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
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Abstract
Ketene dithioacetals are versatile intermediates in organic synthesis. Extensive research, since the last decade, has given rise to new prospects in their chemistry. The objective of this review is twofold: first, to highlight the new prospects in the chemistry of functionalized ketene dithioacetals, and second, to provide an intrinsic link between ketene dithioacetal groups and a variety of other functional groups, which has brought out many new facts that will assist in future designs.
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Affiliation(s)
- Ling Pan
- Department of Chemistry, Northeast Normal University, 5268 Renmin Street, Changchun, 130024, China
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Yuan H, Wang M, Liu Y, Wang L, Liu J, Liu Q. Unexpected Hydrobromic Acid-Catalyzed CC Bond-Forming Reactions and Facile Synthesis of Coumarins and Benzofurans Based on Ketene Dithioacetals. Chemistry 2010; 16:13450-7. [DOI: 10.1002/chem.201002107] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Yuan HJ, Wang M, Liu YJ, Liu Q. Copper(II)-Catalyzed CC Bond-Forming Reactions of α-Electron-Withdrawing Group-Substituted Ketene S,S-Acetals with Carbonyl Compounds and a Facile Synthesis of Coumarins. Adv Synth Catal 2008. [DOI: 10.1002/adsc.200800584] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Fu Z, Wang M, Ma Y, Liu Q, Liu J. Synthesis of Functionalized Allylic Sulfoxides and Their Use in the Construction of 2,3,4-Trisubstituted Furans via a [3 + 2] Annulation. J Org Chem 2008; 73:7625-30. [DOI: 10.1021/jo801406p] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Zhenqian Fu
- Department of Chemistry, Northeast Normal University, Changchun, 130024, People's Republic of China
| | - Mang Wang
- Department of Chemistry, Northeast Normal University, Changchun, 130024, People's Republic of China
| | - Yuhui Ma
- Department of Chemistry, Northeast Normal University, Changchun, 130024, People's Republic of China
| | - Qun Liu
- Department of Chemistry, Northeast Normal University, Changchun, 130024, People's Republic of China
| | - Jun Liu
- Department of Chemistry, Northeast Normal University, Changchun, 130024, People's Republic of China
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Xiao Y, Zhang J. Tetrasubstituted Furans by a PdII-Catalyzed Three-Component Michael Addition/Cyclization/Cross-Coupling Reaction. Angew Chem Int Ed Engl 2008. [DOI: 10.1002/ange.200704531] [Citation(s) in RCA: 77] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Xiao Y, Zhang J. Tetrasubstituted Furans by a PdII-Catalyzed Three-Component Michael Addition/Cyclization/Cross-Coupling Reaction. Angew Chem Int Ed Engl 2008; 47:1903-6. [DOI: 10.1002/anie.200704531] [Citation(s) in RCA: 197] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Zhao YL, Zhang W, Wang S, Liu Q. Ethynyl Ketene-S,S-acetals: The Highly Reactive Electron-Rich Dienophiles and Applications in the Synthesis of 4-Functionalized Quinolines via a One-Pot Three-Component Reaction. J Org Chem 2007; 72:4985-8. [PMID: 17523657 DOI: 10.1021/jo070069q] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
An efficient synthetic method for 4-functionalized quinoline derivatives, 4-((1,3-dithian-2-ylidene)methyl)quinolines, has been developed. Mediated by trifluoromethanesulfonic acid, ethynyl ketene-S,S-acetals can react in a one-pot procedure with various arylamines and aldehydes under mild conditions to give the corresponding quinoline derivatives in good to high yields via a consecutive arylimine formation, regiospecific aza-Diels-Alder (Povarov) reaction, and reductive amination.
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Affiliation(s)
- Yu-Long Zhao
- Department of Chemistry, Northeast Normal University, Changchun, 130024, People's Republic of China.
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Lee KY, Gowrisankar S, Lee YJ, Kim JN. Synthesis of 2-amino-2,3-dihydrobenzofurans and fully substituted furans from modified Baylis–Hillman adducts. Tetrahedron 2006. [DOI: 10.1016/j.tet.2006.06.093] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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A C–C bond formation reaction at the α-carbon atom of α-oxo ketene dithioacetals via the Baylis–Hillman type reaction. Tetrahedron Lett 2005. [DOI: 10.1016/j.tetlet.2005.04.108] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Metwally M, Abdel-Latif E. Versatile α-oxoketene dithioacetals and analogues in heterocycle synthesis. J Sulphur Chem 2004. [DOI: 10.1080/17415990412331300025] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Yahiro S, Shibata K, Saito T, Okauchi T, Minami T. Acid-promoted reaction of trimethylsilylketene bis(ethylthio)acetal with imines. Synthesis of gamma,gamma-bis(ethylthio)allylamines. J Org Chem 2003; 68:4947-50. [PMID: 12790607 DOI: 10.1021/jo020748v] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Acid-catalyzed reaction of silylketene dithioacetal 1 with iminium salts or imines 3b,d-h gave the corresponding gamma,gamma-bis(ethylthio)allylamines 2a-h or 5b,d-h in generally high yields. Similar reactions of 1 with (salicylidene)amines 6a-e afforded 4-amino-2,2-bis(ethylthio)chromans 8a-e in good to moderate yields.
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Affiliation(s)
- Shuhei Yahiro
- Department of Applied Chemistry, Kyushu Institute of Technology, Sensui-cho, Tobata, Kitakyushu 804-8550, Japan
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Arimori S, Kouno R, Okauchi T, Minami T. The first synthesis of phosphonoacrolein. Application to Diels-Alder reaction as heterodiene. J Org Chem 2002; 67:7303-8. [PMID: 12375958 DOI: 10.1021/jo020403c] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The first synthesis of phosphonoacrolein 3 was made in quantitative yield by acidic treatment of beta-ethoxy-alpha-(methoxymethyl)vinylphosphonate 2, derived from a beta-ethoxy-alpha-phosphonovinyl anion and MOMCl. The phosphonoacrolein 3 easily underwent a hetero-Diels-Alder reaction with electron-rich alkenes 4a-f or alkynes 9a-c under mild conditions, and phosphono-substituted pyrans 5a-d, 6e,f or pyranopyrans 11a-c were obtained in good to excellent yields. The reaction of 3 with cyclopentadiene and cyclohexadiene led to mixtures of [2 + 4] and [4 + 2] cycloadducts 7a, 8a and 7b, 8b in modest yields. The cycloaddition reaction between 3 and pyranopyran 13 or dibromocarbene and 13 resulted in [4 + 2] or [2 + 1] cycloadducts 14 or 15 in good yields.
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Affiliation(s)
- Sadayuki Arimori
- Department of Applied Chemistry, Kyushu Institute of Technology, Sensui-cho, Tobata, Kitakyushu 804-8550, Japan
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