1
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Badmus F, Thombal RS, Philkhana SC, Malone JA, Bailey CE, Armendariz-Gonzalez E, Mureka EW, Locicero CM, Fronczek FR, Kartika R. Directing the Stereoselectivity of the Claisen Rearrangement to Form Cyclic Ketones with Full Substitution at the α-Positions. Org Lett 2023; 25:7622-7627. [PMID: 37830497 PMCID: PMC10616857 DOI: 10.1021/acs.orglett.3c02752] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2023] [Indexed: 10/14/2023]
Abstract
We report an enantioselective synthesis of cyclic ketones with full substitutions at the α-positions in a highly diastereoselective manner. Our method is achieved by subjecting substrate motifs in 2-allyloxyenones to chiral organomagnesium reagents, which trigger the Claisen rearrangement upon direct 1,2-carbonyl addition. The observed diastereoselectivity of the allyl migration is proposed to originate from the intramolecular chelation of the magnesium alkoxide to the allyloxy moiety.
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Affiliation(s)
- Fatimat
O. Badmus
- Department of Chemistry, Louisiana State University, 232 Choppin Hall, Baton
Rouge, Louisiana 70803, United States
| | | | | | - Joshua A. Malone
- Department of Chemistry, Louisiana State University, 232 Choppin Hall, Baton
Rouge, Louisiana 70803, United States
| | - Christian E. Bailey
- Department of Chemistry, Louisiana State University, 232 Choppin Hall, Baton
Rouge, Louisiana 70803, United States
| | | | - Edward W. Mureka
- Department of Chemistry, Louisiana State University, 232 Choppin Hall, Baton
Rouge, Louisiana 70803, United States
| | - Cale M. Locicero
- Department of Chemistry, Louisiana State University, 232 Choppin Hall, Baton
Rouge, Louisiana 70803, United States
| | - Frank R. Fronczek
- Department of Chemistry, Louisiana State University, 232 Choppin Hall, Baton
Rouge, Louisiana 70803, United States
| | - Rendy Kartika
- Department of Chemistry, Louisiana State University, 232 Choppin Hall, Baton
Rouge, Louisiana 70803, United States
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2
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Zhang Y, Chen Y, Song M, Tan B, Jiang Y, Yan C, Jiang Y, Hu X, Zhang C, Chen W, Xu J. Total Syntheses of Calyciphylline A-Type Alkaloids (-)-10-Deoxydaphnipaxianine A, (+)-Daphlongamine E and (+)-Calyciphylline R via Late-Stage Divinyl Carbinol Rearrangements. J Am Chem Soc 2022; 144:16042-16051. [PMID: 36007885 DOI: 10.1021/jacs.2c05957] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Among the famous Daphniphyllum alkaloids family, the calyciphylline A-type subfamily has triggered particular interest from the organic synthesis community in recent years. Here, we report divergent total syntheses of three calyciphylline A-type alkaloids, namely, (-)-10-deoxydaphnipaxianine A, (+)-daphlongamine E, and (+)-calyciphylline R. Our work highlights an efficient, divergent strategy via late-stage divinyl carbinol rearrangements, including an unprecedented oxidative Nazarov electrocyclization using an unfunctionalized tertiary divinyl carbinol and an unusual allylic alcohol rearrangement. A highly efficient "donor-acceptor" platinum catalyst was used for a critical nitrile hydration step. Moreover, the power of selective amide reductions has also been showcased by novel and classic tactics.
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Affiliation(s)
- Yan Zhang
- 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
| | - Manrong Song
- 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
| | - Bin Tan
- 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
| | - Yujia Jiang
- 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
| | - Chongyuan Yan
- 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
| | - Yuyang Jiang
- 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
| | - Xinyue Hu
- 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
| | - Chengqian Zhang
- 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
| | - Wenqing 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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3
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Tian X, Zhang Y, Dong H, Ren W, Wang Y. Asymmetric α-Regioselective [3 + 2] Annulation of Morita-Baylis-Hillman Carbonates: Construction of Three Contiguous Stereocenters with Vicinal Quaternary Carbon Centers. J Org Chem 2022; 87:9593-9606. [PMID: 35833878 DOI: 10.1021/acs.joc.2c00582] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Asymmetric α-regioselective annulation of MBH carbonates with 4-arylmethylisoxazol-5-ones has been developed to afford spirocyclic oxindole derivatives containing three contiguous stereogenic centers and vicinal all-carbon quaternary chiral centers. This reaction exhibits a broad substrate scope and excellent functional group tolerance. Excellent yields with high diastereo- and enantioselectivities were obtained in this efficient organocatalytic reaction.
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Affiliation(s)
- Xiaochen Tian
- Molecular Synthesis Center & Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao 266003, China
| | - Yongxing Zhang
- Molecular Synthesis Center & Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao 266003, China
| | - Hao Dong
- Molecular Synthesis Center & Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao 266003, China
| | - Weiwu Ren
- Molecular Synthesis Center & Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao 266003, China.,Laboratory for Marine Drugs and Bioproducts, Qingdao National Laboratory for Marine Science and Technology (QNLM), Qingdao 266237, China
| | - Yang Wang
- Molecular Synthesis Center & Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao 266003, China.,Laboratory for Marine Drugs and Bioproducts, Qingdao National Laboratory for Marine Science and Technology (QNLM), Qingdao 266237, China
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4
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Pan Y, Ren W, Zhang Z, Luo F, Hou X, Li X, Yang YF, Wang Y. Tandem 1,6-addition/cyclopropanation/rearrangement reaction of vinylogous para-quinone methides with 3-chlorooxindoles: construction of vicinal quaternary carbon centers. Org Chem Front 2022. [DOI: 10.1039/d2qo00471b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel tandem 1,6-addition/cyclopropanation/rearrangement reaction of vinylogous para-quinone methides with 3-chlorooxindoles has been developed, providing dispirooxindole–cyclopentane–cyclohexadienones with vicinal quaternary carbon centers.
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Affiliation(s)
- Yuan Pan
- Molecular Synthesis Center & Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao 266003, China
| | - Weiwu Ren
- Molecular Synthesis Center & Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao 266003, China
- Laboratory for Marine Drugs and Bioproducts, Qingdao National Laboratory for Marine Science and Technology (QNLM), Qingdao 266237, China
| | - Zhanhao Zhang
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, Zhejiang 310014, China
| | - Fengbiao Luo
- Molecular Synthesis Center & Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao 266003, China
| | - Xiaohan Hou
- Molecular Synthesis Center & Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao 266003, China
| | - Xiaoyang Li
- Molecular Synthesis Center & Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao 266003, China
| | - Yun-Fang Yang
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, Zhejiang 310014, China
| | - Yang Wang
- Molecular Synthesis Center & Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao 266003, China
- Laboratory for Marine Drugs and Bioproducts, Qingdao National Laboratory for Marine Science and Technology (QNLM), Qingdao 266237, China
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5
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Wang B, Xu B, Xun W, Guo Y, Zhang J, Qiu FG. A General Strategy for the Construction of Calyciphylline A‐Type Alkaloids: Divergent Total Syntheses of (−)‐Daphenylline and (−)‐Himalensine A. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202016212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Bingyang Wang
- Guangzhou Institutes of Biomedicine and Health Chinese Academy of Sciences Guangzhou 510530 China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Bo Xu
- Guangzhou Institutes of Biomedicine and Health Chinese Academy of Sciences Guangzhou 510530 China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Wen Xun
- Guangzhou Institutes of Biomedicine and Health Chinese Academy of Sciences Guangzhou 510530 China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Yiming Guo
- Guangzhou Institutes of Biomedicine and Health Chinese Academy of Sciences Guangzhou 510530 China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Jing Zhang
- Guangzhou Institutes of Biomedicine and Health Chinese Academy of Sciences Guangzhou 510530 China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Fayang G. Qiu
- Guangzhou Institutes of Biomedicine and Health Chinese Academy of Sciences Guangzhou 510530 China
- University of Chinese Academy of Sciences Beijing 100049 China
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6
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Wang B, Xu B, Xun W, Guo Y, Zhang J, Qiu FG. A General Strategy for the Construction of Calyciphylline A-Type Alkaloids: Divergent Total Syntheses of (-)-Daphenylline and (-)-Himalensine A. Angew Chem Int Ed Engl 2021; 60:9439-9443. [PMID: 33569888 DOI: 10.1002/anie.202016212] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2020] [Revised: 01/31/2021] [Indexed: 12/16/2022]
Abstract
An efficient general strategy for the synthesis of the Daphniphyllum alkaloids via the rapid construction of a common core intermediate has been established, based on which a divergent total synthesis of (-)-daphenylline and (-)-himalensine A has been accomplished in 16 and 19 steps, respectively. The present work features an enantioselective Mg(ClO4 )2 -catalyzed intramolecular amidocyclization to construct the aza-bridged core structure; a Cu-catalyzed intramolecular cyclopropanation and subsequent phosphine-catalyzed Cope-type rearrangement to furnish the himalensine A scaffold; and a one-pot Diels-Alder/aromatization method to assemble the aromatic skeleton of daphenylline.
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Affiliation(s)
- Bingyang Wang
- Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530, China.,University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Bo Xu
- Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530, China.,University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Wen Xun
- Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530, China.,University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Yiming Guo
- Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530, China.,University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Jing Zhang
- Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530, China.,University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Fayang G Qiu
- Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530, China.,University of Chinese Academy of Sciences, Beijing, 100049, China
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7
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8
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Abstract
The triterpenoids Daphniphyllum alkaloids share the unique fused hexacyclic ring framework are isolated from the genus Daphniphyllum. These natural products possess comprehensive biological activities and exhibit excellent potential medicinal appliment. This review covers the reported isolation studies and biological activities of Daphniphyllum alkaloids spanning the period from 1966 to the beginning of 2020, In the meantime, the total synthesis of Daphniphyllum alkaloids will be emphatically summarized for supplement over this review series.
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9
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Abstract
Daphnezomines A and B are structurally unusual Daphniphyllum alkaloids that contain a unique aza-adamantane core skeleton. Herein, a modular approach to these alkaloids is presented that exploits a diverse array of reaction strategies. Commencing from a chiral pool terpene-(S)-carvone, the azabicyclo[3.3.1]nonane backbone, which occurs widely in Daphniphyllum alkaloids, was easily accessed through a Sharpless allylic amination and a palladium-catalyzed oxidative cyclization. A protecting group enabled a stereoselective B-alkyl Suzuki-Miyaura coupling sequence and an Fe-mediated hydrogen atom transfer (HAT)-based radical cyclization were then applied to construct C6 and C8 stereocenters. A final epimer locking strategy enabled the assembly of the highly congested aza-adamantane core, thereby achieving the first total synthesis of (-)-daphnezomines A and B in 14 steps.
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Affiliation(s)
- Guangpeng Xu
- College of Life Sciences, Beijing Normal University, Beijing, 100875, China.,National Institute of Biological Sciences (NIBS), Beijing, 102206, China
| | - Jinbao Wu
- National Institute of Biological Sciences (NIBS), Beijing, 102206, China
| | - Luyang Li
- National Institute of Biological Sciences (NIBS), Beijing, 102206, China
| | - Yunan Lu
- National Institute of Biological Sciences (NIBS), Beijing, 102206, China
| | - Chao Li
- National Institute of Biological Sciences (NIBS), Beijing, 102206, China.,Tsinghua Institute of Multidisciplinary Biomedical Research, Tsinghua University, Beijing, 100084, China
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10
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Wang Q, Zhang C, Yang J. Synthesis of ACE tricyclic systems of daphnicyclidin A and dehy-droxymacropodumine A. CHINESE CHEM LETT 2020. [DOI: 10.1016/j.cclet.2019.12.018] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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11
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Guo LD, Hu J, Zhang Y, Tu W, Zhang Y, Pu F, Xu J. Enantioselective Total Synthesis of (-)-Caldaphnidine O via a Radical Cyclization Cascade. J Am Chem Soc 2019; 141:13043-13048. [PMID: 31381311 DOI: 10.1021/jacs.9b07558] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The synthetically challenging, diverse chemical skeletons and promising biological profiles of the Daphniphyllum alkaloids have generated intense interest from the synthetic chemistry community. Herein, the first and enantioselective total synthesis of (-)-caldaphnidine O, a complex bukittinggine-type Daphniphyllum alkaloid, is described. The key transformations in this concise approach included an intramolecular aza-Michael addition, a ring expansion reaction sequence, a Sm(II)/Fe(III)-mediated Kagan-Molander coupling, and the rapid formation of the entire hexacyclic ring skeleton of the target molecule via a radical cyclization cascade reaction, which was inspired by an unexpected radical detosylation observed in our recent dapholdhamine B synthesis.
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Affiliation(s)
- Lian-Dong Guo
- Department of Chemistry and Shenzhen Grubbs Institute , Southern University of Science and Technology , Shenzhen , China
| | - Jingping Hu
- Department of Chemistry and Shenzhen Grubbs Institute , Southern University of Science and Technology , Shenzhen , China
| | - Yan Zhang
- Department of Chemistry and Shenzhen Grubbs Institute , Southern University of Science and Technology , Shenzhen , China
| | - Wentong Tu
- Department of Chemistry and Shenzhen Grubbs Institute , Southern University of Science and Technology , Shenzhen , China
| | - Yue Zhang
- Department of Chemistry and Shenzhen Grubbs Institute , Southern University of Science and Technology , Shenzhen , China
| | - Fan Pu
- Department of Chemistry and Shenzhen Grubbs Institute , Southern University of Science and Technology , Shenzhen , China
| | - Jing Xu
- Department of Chemistry and Shenzhen Grubbs Institute , Southern University of Science and Technology , Shenzhen , China
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12
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Guo LD, Hou J, Tu W, Zhang Y, Zhang Y, Chen L, Xu J. Total Synthesis of Dapholdhamine B and Dapholdhamine B Lactone. J Am Chem Soc 2019; 141:11713-11720. [DOI: 10.1021/jacs.9b05641] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Lian-Dong Guo
- Department of Chemistry and Shenzhen Grubbs Institute, Southern University of Science and Technology, Shenzhen, China
| | - Jieping Hou
- Department of Chemistry and Shenzhen Grubbs Institute, Southern University of Science and Technology, Shenzhen, China
| | - Wentong Tu
- Department of Chemistry and Shenzhen Grubbs Institute, Southern University of Science and Technology, Shenzhen, China
| | - Yan Zhang
- Department of Chemistry and Shenzhen Grubbs Institute, Southern University of Science and Technology, Shenzhen, China
| | - Yue Zhang
- Department of Chemistry and Shenzhen Grubbs Institute, Southern University of Science and Technology, Shenzhen, China
| | - Louxi Chen
- Department of Chemistry and Shenzhen Grubbs Institute, Southern University of Science and Technology, Shenzhen, China
| | - Jing Xu
- Department of Chemistry and Shenzhen Grubbs Institute, Southern University of Science and Technology, Shenzhen, China
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13
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Zhong J, He H, Gao S. Exploration of 1,3-dipolar cycloaddition reactions to construct the core skeleton of Calyciphylline A-type alkaloids. Org Chem Front 2019. [DOI: 10.1039/c9qo01111k] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Nitrone induced 1,3-dipolar [3 + 2] cycloadditions were studied to construct the core structure of Calyciphylline A-type Daphniphyllum alkaloids.
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Affiliation(s)
- Jiaxin Zhong
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai 200062
- China
| | - Haibing He
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development
- East China Normal University
- Shanghai 200062
- China
| | - Shuanhu Gao
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai 200062
- China
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