1
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Zhao Z, Deng G, Li CC. Synthesis of the [6-6-7-5-5] Pentacyclic Core of Calyciphylline N. Org Lett 2024; 26:2238-2242. [PMID: 38442391 DOI: 10.1021/acs.orglett.4c00437] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/07/2024]
Abstract
A new approach for the concise 11-step synthesis of the [6-6-7-5-5] BCDEF pentacyclic core of calyciphylline N is described. A type II [5 + 2] cycloaddition was employed to construct the strained BCD skeleton, which encompasses the challenging bicyclo[2.2.2] and bicyclo[4.3.1] ring systems. With a regio- and diastereoselective Lu's [3 + 2] cycloaddition, followed by intramolecular aldol cyclization and elimination, the desired [5-5]-fused EF ring system has been successfully installed, resulting in the complete carbocyclic skeleton of calyciphylline N.
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Affiliation(s)
- Zhiwen Zhao
- Shenzhen Grubbs Institute, Department of Chemistry, Guangming Advanced Research Institute, Southern University of Science and Technology, Shenzhen, Guangdong 518055, People's Republic of China
| | - Guowei Deng
- Shenzhen Grubbs Institute, Department of Chemistry, Guangming Advanced Research Institute, Southern University of Science and Technology, Shenzhen, Guangdong 518055, People's Republic of China
| | - Chuang-Chuang Li
- Shenzhen Grubbs Institute, Department of Chemistry, Guangming Advanced Research Institute, Southern University of Science and Technology, Shenzhen, Guangdong 518055, People's Republic of China
- Shenzhen Bay Laboratory, Shenzhen, Guangdong 518132, People's Republic of China
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2
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Wright BA, Regni A, Chaisan N, Sarpong R. Navigating Excess Complexity: Total Synthesis of Daphenylline. J Am Chem Soc 2024; 146:1813-1818. [PMID: 38207289 DOI: 10.1021/jacs.3c12953] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2024]
Abstract
Retrosynthetic analysis is a framework for designing synthetic routes to complex molecules that generally prioritizes disconnections which reduce molecular complexity. However, strict adherence to this principle can overlook pathways involving highly complex intermediates that can be easily prepared through powerful bond-forming transformations. Herein, we demonstrate this tactic of generating excess complexity, followed by strategic bond-cleavage, as a highly effective approach for the 11-step total synthesis of the Daphniphyllum alkaloid daphenylline. To implement this strategy, we accessed a bicyclo[4.1.0]heptane core through a dearomative Buchner cycloaddition, which enabled construction of the seven-membered ring after C-C bond cleavage. Installation of the synthetically challenging quaternary stereocenter methyl group was achieved through a thia-Paternò-Büchi [2 + 2] photocycloaddition followed by stereospecific thietane reduction, further illustrating how building excess complexity can enable desired synthetic outcomes after strategic bond-breaking events. This strategy leveraging bond cleavage transformations should serve as a complement to traditional bond-forming, complexity-generating synthetic strategies.
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Affiliation(s)
- Brandon A Wright
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - Alessio Regni
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - Nattawadee Chaisan
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - Richmond Sarpong
- Department of Chemistry, University of California, Berkeley, California 94720, United States
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3
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Wu BL, Yao JN, Long XX, Tan ZQ, Liang X, Feng L, Wei K, Yang YR. Enantioselective Total Synthesis of (-)-Daphenylline. J Am Chem Soc 2024; 146:1262-1268. [PMID: 38180776 DOI: 10.1021/jacs.3c12741] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2024]
Abstract
A concise enantioselective total synthesis of (-)-daphenylline, a hexacyclic Daphniphyllum alkaloid with a unique benzene ring, was achieved in 14 steps. The synthesis commences with two chiral stereocenters, C2 and C18, readily installed via Carreira's Ir/amine dual-catalyzed allylation. The allylic bridgehead amine 6 was rapidly prepared through Wickens' photoredox-catalyzed hydrocarboxylation of olefin and CuBr2-catalyzed α-amination of ketone. The tetracycle 4 was formed via Pd-catalyzed reductive Heck reaction or, more concisely, by Krische's Rh-catalyzed reductive 1,6-enyne cyclization. In this synthesis, newly reported Wickens' photoredox-catalyzed hydrocarboxylation was used twice, and Friedel-Crafts acylation thrice.
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Affiliation(s)
- Bing-Lu Wu
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jian-Neng Yao
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China
| | - Xiang-Xi Long
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zong-Qin Tan
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xiao Liang
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China
| | - Li Feng
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Kun Wei
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China
| | - Yu-Rong Yang
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China
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4
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Zhang W, Lu M, Ren L, Zhang X, Liu S, Ba M, Yang P, Li A. Total Synthesis of Four Classes of Daphniphyllum Alkaloids. J Am Chem Soc 2023; 145:26569-26579. [PMID: 38032297 DOI: 10.1021/jacs.3c06088] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2023]
Abstract
The macrodaphniphyllamine-type, calyciphylline A-type, daphnilongeranin A-type, and daphnicyclidin D-type alkaloids are four structurally related classes of Daphniphyllum alkaloids. On the basis of a systematic analysis of the biogenetic network of these classes, we developed synthetic strategies centered on the C4-N and C1-C8 bonds of calyciphylline A, which took full advantage of the suitable substrates, reactions, and pathways that are altered from their counterparts in the postulated biogenetic network. Through this generalized biomimetic approach, we achieved the first synthesis of 14 Daphniphyllum alkaloids from the four subfamilies.
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Affiliation(s)
- Wenhao Zhang
- State Key Laboratory of Chemical Biology, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200032, China
| | - Ming Lu
- State Key Laboratory of Chemical Biology, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200032, China
| | - Lu Ren
- State Key Laboratory of Chemical Biology, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200032, China
| | - Xiang Zhang
- State Key Laboratory of Chemical Biology, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200032, China
| | - Shaonan Liu
- State Key Laboratory of Chemical Biology, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200032, China
| | - Mengyu Ba
- State Key Laboratory of Chemical Biology, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200032, China
- Henan Institute of Advanced Technology and College of Chemistry, Zhengzhou University, Zhengzhou 450001, China
| | - Peng Yang
- Henan Institute of Advanced Technology and College of Chemistry, Zhengzhou University, Zhengzhou 450001, China
| | - Ang Li
- State Key Laboratory of Chemical Biology, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200032, China
- Henan Institute of Advanced Technology and College of Chemistry, Zhengzhou University, Zhengzhou 450001, China
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5
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Zou YP, Lai ZL, Zhang MW, Peng J, Ning S, Li CC. Total Synthesis of (±)- and (-)-Daphnillonin B. J Am Chem Soc 2023; 145:10998-11004. [PMID: 37167083 DOI: 10.1021/jacs.3c03755] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
The first total synthesis of (±)- and (-)-daphnillonin B, a daphnicyclidin-type alkaloid with a new [7-6-5-7-5-5] A/B/C/D/E/F hexacyclic core, has been achieved. The [6-5-7] B/C/D ring system was efficiently and diastereoselectively constructed via a mild type I intramolecular [5+2] cycloaddition, followed by a Grubbs II catalyst-catalyzed radical cyclization. The [5-5] fused E/F ring system was synthesized via a diastereoselective intramolecular Pauson-Khand reaction. Notably, the synthetically challenging [7-6-5-7-5-5] hexacyclic core was reassembled by a unique Wagner-Meerwein-type rearrangement from the [6-6-5-7-5-5] hexacyclic framework found in calyciphylline A-type Daphniphyllum alkaloids.
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Affiliation(s)
- Yun-Peng Zou
- Shenzhen Grubbs Institute, Department of Chemistry, Guangming Advanced Research Institute, Southern University of Science and Technology, Shenzhen 518055, China
| | - Zheng-Lin Lai
- Shenzhen Grubbs Institute, Department of Chemistry, Guangming Advanced Research Institute, Southern University of Science and Technology, Shenzhen 518055, China
| | - Meng-Wei Zhang
- Shenzhen Grubbs Institute, Department of Chemistry, Guangming Advanced Research Institute, Southern University of Science and Technology, Shenzhen 518055, China
| | - Jianzhao Peng
- Shenzhen Grubbs Institute, Department of Chemistry, Guangming Advanced Research Institute, Southern University of Science and Technology, Shenzhen 518055, China
| | - Shuai Ning
- Shenzhen Grubbs Institute, Department of Chemistry, Guangming Advanced Research Institute, Southern University of Science and Technology, Shenzhen 518055, China
| | - Chuang-Chuang Li
- Shenzhen Grubbs Institute, Department of Chemistry, Guangming Advanced Research Institute, Southern University of Science and Technology, Shenzhen 518055, China
- Shenzhen Bay Laboratory, Shenzhen 518132, China
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6
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Kučera R, Ellis SR, Yamazaki K, Hayward Cooke J, Chekshin N, Christensen KE, Hamlin TA, Dixon DJ. Enantioselective Total Synthesis of (-)-Himalensine A via a Palladium and 4-Hydroxyproline Co-catalyzed Desymmetrization of Vinyl-bromide-tethered Cyclohexanones. J Am Chem Soc 2023; 145:5422-5430. [PMID: 36820616 PMCID: PMC9999414 DOI: 10.1021/jacs.2c13710] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
Abstract
Herein, we describe the convergent enantioselective total synthesis of himalensine A in 18 steps, enabled by a highly enantio- and diastereoselective construction of the morphan core via a palladium/hydroxy proline co-catalyzed desymmetrization of vinyl-bromide-tethered cyclohexanones. The reaction pathway was illuminated by density functional theory calculations, which support an intramolecular Heck reaction of an in situ-generated enamine intermediate, where exquisite enantioselectivity arises from intramolecular carboxylate coordination to the vinyl palladium species in the rate- and enantio-determining carbopalladation steps. The reaction tolerates diverse N-derivatives, all-carbon quaternary centers, and trisubstituted olefins, providing access to molecular scaffolds found in a range of complex natural products. Following large-scale preparation of a key substrate and installation of a β-substituted enone moiety, the rapid construction of himalensine A was achieved using a highly convergent strategy based on an amide coupling/Michael addition/allylation/ring-closing metathesis sequence which allowed the introduction of three of the five rings in only three synthetic steps (after telescoping). Moreover, our strategy provides a new enantioselective access to a known tetracyclic late-stage intermediate that has been used previously in the synthesis of many Daphniphyllum alkaloids.
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Affiliation(s)
- Roman Kučera
- Department of Chemistry, Chemical Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, U.K
| | - Sam R Ellis
- Department of Chemistry, Chemical Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, U.K
| | - Ken Yamazaki
- Department of Chemistry, Chemical Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, U.K.,Department of Theoretical Chemistry, Amsterdam Institute of Molecular and Life Sciences (AIMMS), and Amsterdam Center for Multiscale Modeling (ACMM), Vrije Universiteit Amsterdam, De Boelelaan 1083, Amsterdam 1081 HV, The Netherlands
| | - Jack Hayward Cooke
- Department of Chemistry, Chemical Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, U.K
| | - Nikita Chekshin
- Department of Chemistry, Chemical Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, U.K
| | - Kirsten E Christensen
- Department of Chemistry, Chemical Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, U.K
| | - Trevor A Hamlin
- Department of Theoretical Chemistry, Amsterdam Institute of Molecular and Life Sciences (AIMMS), and Amsterdam Center for Multiscale Modeling (ACMM), Vrije Universiteit Amsterdam, De Boelelaan 1083, Amsterdam 1081 HV, The Netherlands
| | - Darren J Dixon
- Department of Chemistry, Chemical Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, U.K
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7
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Han F, Lu GS, Wu DP, Huang PQ. Iridium and B(C6F5)3 co-catalyzed chemoselective deoxygenative reduction of tertiary amides: application to the efficient synthesis and late-stage modification of pharmaceuticals. Sci China Chem 2023. [DOI: 10.1007/s11426-022-1501-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/15/2023]
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8
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Hu J, Chen W, Jiang Y, Xu J. Synthesis of Tetracyclic Core Structure of Daphnezomines A and B. CHINESE J ORG CHEM 2023. [DOI: 10.6023/cjoc202208014] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
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9
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Nakajima D, Yokoshima S. Construction of the [7-5-5] Tricyclic Core of Daphniphyllum Alkaloids via a Cationic Cascade Reaction. Org Lett 2022; 24:9520-9524. [PMID: 36524720 DOI: 10.1021/acs.orglett.2c04023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The [7-5-5] tricyclic core of daphniphyllum alkaloids, containing contiguous stereogenic centers at C14 and C15 and a tetrasubstituted alkene moiety between C9 and C10, was constructed via a cascade reaction that involved an electrocyclic reaction of a pentadienyl cation and intramolecular interception of the resultant cyclopentenyl cation.
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Affiliation(s)
- Daisuke Nakajima
- Graduate School of Pharmaceutical Sciences, Nagoya University, Nagoya 464-8601, Japan
| | - Satoshi Yokoshima
- Graduate School of Pharmaceutical Sciences, Nagoya University, Nagoya 464-8601, Japan
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10
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Li LX, Min L, Yao TB, Ji SX, Qiao C, Tian PL, Sun J, Li CC. Total Synthesis of Yuzurine-type Alkaloid Daphgraciline. J Am Chem Soc 2022; 144:18823-18828. [PMID: 36198113 DOI: 10.1021/jacs.2c09548] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The first total synthesis of daphgraciline has been achieved, which also represents the first example of the synthesis of Daphniphyllum yuzurine-type alkaloids (∼50 members). The unique bridged azabicyclo[4.3.1] ring system in the yuzurine-type subfamily was efficiently and diastereoselectively assembled via a mild type II [5+2] cycloaddition for the first time. The compact tetracyclic [6-7-5-5] skeleton was installed efficiently via an intramolecular Diels-Alder reaction, followed by a benzilic acid-type rearrangement. The synthetically challenging spiro tetrahydropyran moiety in the final product was installed diastereoselectively via a TiIII-mediated reductive epoxide coupling reaction. Potential access to enantioenriched daphgraciline is presented.
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Affiliation(s)
- Li-Xuan Li
- Shenzhen Grubbs Institute, Department of Chemistry, Guangdong Provincial Key Laboratory of Catalytic Chemistry, Southern University of Science and Technology, Shenzhen 518055, China.,Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China
| | - Long Min
- Shenzhen Grubbs Institute, Department of Chemistry, Guangdong Provincial Key Laboratory of Catalytic Chemistry, Southern University of Science and Technology, Shenzhen 518055, China
| | - Tian-Bing Yao
- Shenzhen Grubbs Institute, Department of Chemistry, Guangdong Provincial Key Laboratory of Catalytic Chemistry, Southern University of Science and Technology, Shenzhen 518055, China
| | - Shu-Xiao Ji
- Shenzhen Grubbs Institute, Department of Chemistry, Guangdong Provincial Key Laboratory of Catalytic Chemistry, Southern University of Science and Technology, Shenzhen 518055, China
| | - Chuang Qiao
- Shenzhen Grubbs Institute, Department of Chemistry, Guangdong Provincial Key Laboratory of Catalytic Chemistry, Southern University of Science and Technology, Shenzhen 518055, China
| | - Pei-Lin Tian
- Shenzhen Grubbs Institute, Department of Chemistry, Guangdong Provincial Key Laboratory of Catalytic Chemistry, Southern University of Science and Technology, Shenzhen 518055, China
| | - Jianwei Sun
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China
| | - Chuang-Chuang Li
- Shenzhen Grubbs Institute, Department of Chemistry, Guangdong Provincial Key Laboratory of Catalytic Chemistry, Southern University of Science and Technology, Shenzhen 518055, China.,Shenzhen Bay Laboratory, Shenzhen 518132, China
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11
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Hu J, Guo LD, Chen W, Jiang Y, Pu F, Ning C, Xu J. Total Syntheses of Daphnezomine L-type and Secodaphniphylline-type Daphniphyllum Alkaloids via Late-Stage C-N Bond Activation. Org Lett 2022; 24:7416-7420. [PMID: 36191161 DOI: 10.1021/acs.orglett.2c02988] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Here, we report the first total syntheses of daphnezomine L-type alkaloids daphnezomine L methyl ester and calyciphylline K via late-stage C-N bond activation. The first synthesis of secodaphniphylline-type alkaloid caldaphnidine D was also achieved via a similar strategy. Other key transformations employed in our synthesis were a facile vicinal diol olefination and an efficient radical cyclization cascade. Biological studies indicated two synthetic compounds possess promising neuroprotective activity.
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Affiliation(s)
- Jingping Hu
- School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin150001, China.,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, Shenzhen518055, China
| | - 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, Shenzhen518055, 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, Shenzhen518055, 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, Shenzhen518055, China
| | - Fan Pu
- 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, Shenzhen518055, China
| | - Chengqing Ning
- 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, Shenzhen518055, China.,SUSTech Academy for Advanced Interdisciplinary Studies, Shenzhen, Guangdong518055, 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, Shenzhen518055, China.,Shenzhen Bay Laboratory, Shenzhen518132, China
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12
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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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13
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Cao MY, Ma BJ, Gu QX, Fu B, Lu HH. Concise Enantioselective Total Synthesis of Daphenylline Enabled by an Intramolecular Oxidative Dearomatization. J Am Chem Soc 2022; 144:5750-5755. [PMID: 35289615 DOI: 10.1021/jacs.2c01674] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Daphenylline is a structurally unique member of the triterpenoid Daphniphyllum natural alkaloids, which exhibit intriguing biological activities. Six total syntheses have been reported, five of which utilize aromatization approaches. Herein, we report a concise protecting-group-free total synthesis by means of a novel intramolecular oxidative dearomatization reaction, which concurrently generates the critical seven-membered ring and the quaternary-containing vicinal stereocenters. Other notable transformations include a tandem reductive amination/amidation double cyclization reaction, to assemble the cage-like architecture, and installation of the other two chiral stereocenters via a highly enantioselective rhodium-catalyzed challenging hydrogenation of the diene intermediate (90% e.e.) and an unprecedented remote acid-directed Mukaiyama-Michael reaction of the complex benzofused cyclohexanone (13:1 d.r.).
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Affiliation(s)
- Meng-Yue Cao
- Department of Chemistry, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, China.,Key Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province, School of Science, Westlake University, 18 Shilongshan Road, Hangzhou 310024, China.,Institute of Natural Sciences, Westlake Institute for Advanced Study, Hangzhou 310024, China
| | - Bin-Jie Ma
- Key Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province, School of Science, Westlake University, 18 Shilongshan Road, Hangzhou 310024, China.,Institute of Natural Sciences, Westlake Institute for Advanced Study, Hangzhou 310024, China
| | - Qing-Xiu Gu
- Department of Chemistry, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, China.,Key Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province, School of Science, Westlake University, 18 Shilongshan Road, Hangzhou 310024, China.,Institute of Natural Sciences, Westlake Institute for Advanced Study, Hangzhou 310024, China
| | - Bei Fu
- Key Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province, School of Science, Westlake University, 18 Shilongshan Road, Hangzhou 310024, China.,Institute of Natural Sciences, Westlake Institute for Advanced Study, Hangzhou 310024, China
| | - Hai-Hua Lu
- Department of Chemistry, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, China.,Key Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province, School of Science, Westlake University, 18 Shilongshan Road, Hangzhou 310024, China.,Institute of Natural Sciences, Westlake Institute for Advanced Study, Hangzhou 310024, China
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14
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Zhang X, Xu J. Five-membered carbocycle construction in the synthesis of Daphniphyllum alkaloids: recent strategic and methodological advances. Org Chem Front 2022. [DOI: 10.1039/d2qo01410f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
In this review article, we summarize novel or non-standard strategies and methods for the five-membered carbocycle construction in recent Daphniphyllum alkaloid synthesis.
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Affiliation(s)
- Xiaofeng Zhang
- School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China
- 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
- Shenzhen Bay Laboratory, Shenzhen 518132, China
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15
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Cui Y, Ren J, Lv J, Wang Z. Studies toward the Total Syntheses of Calyciphylline D-Type Daphniphyllum Alkaloids. Org Lett 2021; 23:9189-9193. [PMID: 34791884 DOI: 10.1021/acs.orglett.1c03497] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
An efficient construction of an aza-[5.7.6.5] tetracyclic core structure of calyciphylline D-type Daphniphyllum alkaloids has been achieved. The synthetic route features a diastereoselective cyclopropanation, efficient construction of the core bridged 8-aza-[3.2.1]octane skeleton through a [3 + 2] IMCC strategy, oxidative dearomatization of phenol, and gram-scale preparation in each step.
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Affiliation(s)
- Yi Cui
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, PR China
| | - Jun Ren
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, PR China
| | - Jiayuan Lv
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, PR China
| | - Zhongwen Wang
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, PR China
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16
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Li X, Huang Y. Phosphine-catalyzed sequential (2+3)/(2+4) annulation of γ-vinyl allenoates: access to the synthesis of chromeno[4,3- b]pyrroles. Chem Commun (Camb) 2021; 57:9934-9937. [PMID: 34498650 DOI: 10.1039/d1cc04199a] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
A phosphine-catalyzed cascade (2+3)/(2+4) cyclization reaction of γ-vinyl allenoates with aldimine esters has been developed to provide a series of chromeno[4,3-b]pyrrole derivatives that contain three contiguous stereogenic centers. The method gives a good yield, excellent chemoselectivity and diastereoselectivity under mild conditions.
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Affiliation(s)
- Xiaohu Li
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China.
| | - You Huang
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China.
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17
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Chen Y, Guo LD, Xu J. Synthesis of the tricyclic skeleton of Daphniphyllum alkaloids daphnimacropodines. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2021.153030] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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18
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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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19
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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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20
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Li H, Zhang J, She X. The Total Synthesis of Diquinane-Containing Natural Products. Chemistry 2021; 27:4839-4858. [PMID: 32955141 DOI: 10.1002/chem.202003741] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Revised: 09/15/2020] [Indexed: 12/18/2022]
Abstract
Diquinane or bicyclo[3.3.0]octane is a conspicuous structural unit existing in the carbo-frameworks of a wide range of natural products such as alkaloids and terpenoids. These diquinane-containing molecules not merely exhibit intriguing architectures, but also showcase a broad spectrum of significant bioactivities, which draw widespread attention from the global synthetic community. During the past decade, with an aim to accomplish the total syntheses of such specified cornucopias of natural products, a variety of elegant strategies for construction of the diquinane ring system have been disclosed. In this Minireview, the achievements on this subject in the timeline from 2010 to June 2020 are demonstrated and it is discussed how the diquinane unit is strategically forged in the context of the specific target structure. In addition, impacts of the selected works to the field of natural product total synthesis is highlighted and the particular outlook of diquinane-containing natural product synthesis is provided.
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Affiliation(s)
- Huilin Li
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, 222 South Tianshui Road, Lanzhou, 730000, Gansu, P. R. China
| | - Jing Zhang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, 222 South Tianshui Road, Lanzhou, 730000, Gansu, P. R. China
| | - Xuegong She
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, 222 South Tianshui Road, Lanzhou, 730000, Gansu, P. R. China
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21
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Fan JH, Hu YJ, Li LX, Wang JJ, Li SP, Zhao J, Li CC. Recent advances in total syntheses of natural products containing the benzocycloheptane motif. Nat Prod Rep 2021; 38:1821-1851. [PMID: 33650613 DOI: 10.1039/d1np00003a] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Covering: 2010 to 2020Benzocycloheptane is a fundamental and unique structural motif found in pharmaceuticals and natural products. The total syntheses of natural products bearing the benzocycloheptane subunit are challenging and there are only a few efficient approaches to access benzocycloheptane. Thus, new methods and innovative strategies for preparing such natural products need to be developed. In this review, recent progress in the total syntheses of natural products bearing the benzocycloheptane motif is presented, and key transformations for the construction of benzocycloheptane are highlighted. This review provides a useful guide for those engaged in the syntheses of natural products containing the benzocycloheptane motif.
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Affiliation(s)
- Jian-Hong Fan
- Institute of Chinese Medical Sciences, University of Macau, Macau, China. and Shenzhen Grubbs Institute and Department of Chemistry, Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen 518055, China.
| | - Ya-Jian Hu
- Institute of Chinese Medical Sciences, University of Macau, Macau, China. and Shenzhen Grubbs Institute and Department of Chemistry, Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen 518055, China.
| | - Li-Xuan Li
- Shenzhen Grubbs Institute and Department of Chemistry, Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen 518055, China.
| | - Jing-Jing Wang
- Shenzhen Grubbs Institute and Department of Chemistry, Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen 518055, China.
| | - Shao-Ping Li
- Institute of Chinese Medical Sciences, University of Macau, Macau, China.
| | - Jing Zhao
- Institute of Chinese Medical Sciences, University of Macau, Macau, China.
| | - Chuang-Chuang Li
- Shenzhen Grubbs Institute and Department of Chemistry, Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen 518055, China.
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22
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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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23
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Wang Z, Liu J. All-carbon [3 + 2] cycloaddition in natural product synthesis. Beilstein J Org Chem 2020; 16:3015-3031. [PMID: 33363670 PMCID: PMC7736699 DOI: 10.3762/bjoc.16.251] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Accepted: 11/21/2020] [Indexed: 12/28/2022] Open
Abstract
Many natural products possess interesting medicinal properties that arise from their intriguing chemical structures. The highly-substituted carbocycle is one of the most common structural features in many structurally complicated natural products. However, the construction of highly-substituted, stereo-congested, five-membered carbocycles containing all-carbon quaternary center(s) is, at present, a distinct challenge in modern synthetic chemistry, which can be accessed through the all-carbon [3 + 2] cycloaddition. More importantly, the all-carbon [3 + 2] cycloaddition can forge vicinal all-carbon quaternary centers in a single step and has been demonstrated in the synthesis of complex natural products. In this review, we present the development of all-carbon [3 + 2] cycloadditions and illustrate their application in natural product synthesis reported in the last decade covering 2011-2020 (inclusive).
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Affiliation(s)
- Zhuo Wang
- School of Medicine, Southern University of Science and Technology, Shenzhen, 518055, People's Republic of China
| | - Junyang Liu
- Academy for Advanced Interdisciplinary Studies, Southern University of Science and Technology, Shenzhen, 518055, People's Republic of China
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24
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Synthetic studies towards the mannolides: Construction of the bowl-shaped B/C/D ring system. Tetrahedron 2020. [DOI: 10.1016/j.tet.2020.131629] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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25
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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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26
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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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27
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Mies T, Ma TK, Barrett AGM. Syntheses of polyfunctional aromatic compounds from non-aromatic precursors. RUSSIAN CHEMICAL REVIEWS 2020. [DOI: 10.1070/rcr4931] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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28
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Komine K, Lambert KM, Savage QR, Cox JB, Wood JL. Synthetic studies toward longeracemine: a SmI 2-mediated spirocyclization and rearrangement cascade to construct the 2-azabicyclo[2.2.1]heptane framework. Chem Sci 2020; 11:9488-9493. [PMID: 34094215 PMCID: PMC8162136 DOI: 10.1039/d0sc03422c] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Longeracemine, a member of the Daphniphyllum family of alkaloids contains a novel carbon framework featuring a highly functionalized 2-azabicyclo[2.2.1]heptane core as part of an overall 5/6/5/5/6/5 skeleton. A synthetic intermediate containing the core of longeracemine has been efficiently prepared by employing a stereoselective SmI2-mediated cascade reaction to advance a 7-azabicyclo[2.2.1]heptadiene to a 2-azabicyclo[2.2.1]heptene that is functionally poised for conversion to the natural product.
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Affiliation(s)
- Keita Komine
- Department of Chemistry and Biochemistry, Baylor University One Bear Place 97348 Waco TX 76798 USA
| | - Kyle M. Lambert
- Department of Chemistry and Biochemistry, Baylor UniversityOne Bear Place 97348WacoTX 76798USA
| | - Quentin R. Savage
- Department of Chemistry and Biochemistry, Baylor UniversityOne Bear Place 97348WacoTX 76798USA
| | - Joshua B. Cox
- Department of Chemistry and Biochemistry, Baylor UniversityOne Bear Place 97348WacoTX 76798USA
| | - John L. Wood
- Department of Chemistry and Biochemistry, Baylor UniversityOne Bear Place 97348WacoTX 76798USA
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29
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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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30
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Li X, Ren B, Xie X, Tian Z, Chen FY, Gamble AB, Han B. Regiodivergent synthesis of aza-quaternary carbon derivatives from pyrazolinone ketimines and 1,2-dihydroquinolines. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2020.152055] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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31
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Sasano Y. Total Syntheses of Calyciphylline A-type Alkaloids with Highly Condensed Polycyclic Structures. J SYN ORG CHEM JPN 2020. [DOI: 10.5059/yukigoseikyokaishi.78.353] [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)
- Yusuke Sasano
- Graduate School of Pharmaceutical Sciences, Tohoku University
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32
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Zhai S, Qiu S, Chen L, Niu Y, Yu Y, Yang B, Zhang B, Han C, Yang L, Zhai H. Synthesis of cyclobutane-fused oxygen-containing tricyclic framework via thermally promoted intramolecular cycloaddition of cyclohexadienone-tethered allenes. Chem Commun (Camb) 2020; 56:3405-3408. [PMID: 32091059 DOI: 10.1039/d0cc00061b] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We have developed a unique approach for the thermally promoted cycloaddition of cyclohexadienone-tethered allenes to form a versatile cyclobutane-fused oxygen-containing tricyclic framework in an environmentally friendly and atomic economic fashion with high regioselectivity. The reaction encompasses a broad substrate scope and functional group tolerance of cyclohexadienone moieties. Moreover, the cycloaddition was also applicable to the late-stage functionalization of pharmaceutically relevant compounds.
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Affiliation(s)
- Shengxian Zhai
- College of Chemistry & Environmental Engineering, Anyang Institute of Technology, Anyang, Henan 455000, China and The State Key Laboratory of Chemical Oncogenomics, Shenzhen Engineering Laboratory of Nano Drug Slow-Release, School of Chemical Biology and Biotechnology, Shenzhen Graduate School of Peking University, Shenzhen 518055, China. and School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Coal Mine Safety of Henan Province, Henan Polytechnic University, Jiaozuo, Henan 454000, China
| | - Shuxian Qiu
- The State Key Laboratory of Chemical Oncogenomics, Shenzhen Engineering Laboratory of Nano Drug Slow-Release, School of Chemical Biology and Biotechnology, Shenzhen Graduate School of Peking University, Shenzhen 518055, China. and Department of Chemistry, Guangdong University of Education, Guangzhou 510303, China
| | - Lunjian Chen
- School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Coal Mine Safety of Henan Province, Henan Polytechnic University, Jiaozuo, Henan 454000, China
| | - Yongsheng Niu
- College of Chemistry & Environmental Engineering, Anyang Institute of Technology, Anyang, Henan 455000, China
| | - Youzhu Yu
- College of Chemistry & Environmental Engineering, Anyang Institute of Technology, Anyang, Henan 455000, China
| | - Bo Yang
- College of Chemistry & Environmental Engineering, Anyang Institute of Technology, Anyang, Henan 455000, China
| | - Beining Zhang
- College of Chemistry & Environmental Engineering, Anyang Institute of Technology, Anyang, Henan 455000, China
| | - Chuchu Han
- College of Chemistry & Environmental Engineering, Anyang Institute of Technology, Anyang, Henan 455000, China
| | - Liguo Yang
- College of Chemistry & Environmental Engineering, Anyang Institute of Technology, Anyang, Henan 455000, China
| | - Hongbin Zhai
- The State Key Laboratory of Chemical Oncogenomics, Shenzhen Engineering Laboratory of Nano Drug Slow-Release, School of Chemical Biology and Biotechnology, Shenzhen Graduate School of Peking University, Shenzhen 518055, China. and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300071, China
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33
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34
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Zhang J, Yan Y, Hu R, Li T, Bai W, Yang Y. Enantioselective Total Syntheses of Lyconadins A–E through a Palladium‐Catalyzed Heck‐Type Reaction. Angew Chem Int Ed Engl 2020; 59:2860-2866. [DOI: 10.1002/anie.201912948] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2019] [Revised: 11/18/2019] [Indexed: 11/07/2022]
Affiliation(s)
- Jiayang Zhang
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource EvaluationSchool of PharmacyHuazhong University of Science and Technology 13 Hangkong Road Wuhan Hubei 430030 China
| | - Yangtian Yan
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource EvaluationSchool of PharmacyHuazhong University of Science and Technology 13 Hangkong Road Wuhan Hubei 430030 China
| | - Rong Hu
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource EvaluationSchool of PharmacyHuazhong University of Science and Technology 13 Hangkong Road Wuhan Hubei 430030 China
| | - Ting Li
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource EvaluationSchool of PharmacyHuazhong University of Science and Technology 13 Hangkong Road Wuhan Hubei 430030 China
| | - Wen‐Ju Bai
- Department of ChemistryStanford University Stanford CA 94305-5080 USA
| | - Yang Yang
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource EvaluationSchool of PharmacyHuazhong University of Science and Technology 13 Hangkong Road Wuhan Hubei 430030 China
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35
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Zhang J, Yan Y, Hu R, Li T, Bai W, Yang Y. Enantioselective Total Syntheses of Lyconadins A–E through a Palladium‐Catalyzed Heck‐Type Reaction. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201912948] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Jiayang Zhang
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource EvaluationSchool of PharmacyHuazhong University of Science and Technology 13 Hangkong Road Wuhan Hubei 430030 China
| | - Yangtian Yan
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource EvaluationSchool of PharmacyHuazhong University of Science and Technology 13 Hangkong Road Wuhan Hubei 430030 China
| | - Rong Hu
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource EvaluationSchool of PharmacyHuazhong University of Science and Technology 13 Hangkong Road Wuhan Hubei 430030 China
| | - Ting Li
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource EvaluationSchool of PharmacyHuazhong University of Science and Technology 13 Hangkong Road Wuhan Hubei 430030 China
| | - Wen‐Ju Bai
- Department of ChemistryStanford University Stanford CA 94305-5080 USA
| | - Yang Yang
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource EvaluationSchool of PharmacyHuazhong University of Science and Technology 13 Hangkong Road Wuhan Hubei 430030 China
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36
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Sk MR, Maji MS. Cobalt(iii)-catalyzed ketone-directed C–H vinylation using vinyl acetate. Org Chem Front 2020. [DOI: 10.1039/c9qo01164a] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Weakly coordinating, ketone-directed C–H vinylation using vinyl acetate is reported here for a wide range of aromatic ketones such as acetophenones, diaryl ketones, chromones and chalcones under cost-effective and air-stable cobalt(iii)-catalysis.
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Affiliation(s)
- Md Raja Sk
- Department of Chemistry
- Indian Institute of Technology Kharagpur
- Kharagpur 721302
- India
| | - Modhu Sudan Maji
- Department of Chemistry
- Indian Institute of Technology Kharagpur
- Kharagpur 721302
- India
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37
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Baidilov D, Miskey S, Hudlicky T. Rapid Access to the Tricyclic Core of Calyciphylline A
-Type Alkaloids Through Allyl Cyanate-to-Isocyanate Rearrangement. European J Org Chem 2019. [DOI: 10.1002/ejoc.201901549] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Daler Baidilov
- Department of Chemistry and Centre for Biotechnology; Brock University; 1812 Sir Isaac Brock Way L2S 3A1 St. Catharines ON Canada
| | - Scott Miskey
- Department of Chemistry and Centre for Biotechnology; Brock University; 1812 Sir Isaac Brock Way L2S 3A1 St. Catharines ON Canada
| | - Tomas Hudlicky
- Department of Chemistry and Centre for Biotechnology; Brock University; 1812 Sir Isaac Brock Way L2S 3A1 St. Catharines ON Canada
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38
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Du C, Fang J, Chen J, Liu Z, Li H, Wang X, Xie X, She X. Construction of the Tetracyclic Core of Calyciphylline B-Type Daphniphyllum Alkaloids. Org Lett 2019; 21:8718-8721. [PMID: 31613108 DOI: 10.1021/acs.orglett.9b03322] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
A double cyclization strategy was developed to construct the common tetracyclic core of calyciphylline B-type alkaloids. Key features of the synthesis included asymmetric Evans alkylation, ring-closing metathesis reaction, intermolecular amidation, intramolecular aza-Michael addition, and aldol condensation reactions. This strategy may be applied to the total syntheses of this type of natural product.
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Affiliation(s)
- Chenglong Du
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering , Lanzhou University , Lanzhou 730000 , P.R. China
| | - Jing Fang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering , Lanzhou University , Lanzhou 730000 , P.R. China
| | - Jinyan Chen
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering , Lanzhou University , Lanzhou 730000 , P.R. China
| | - Zaimin Liu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering , Lanzhou University , Lanzhou 730000 , P.R. China
| | - Huilin Li
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering , Lanzhou University , Lanzhou 730000 , P.R. China
| | - Xiaolei Wang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering , Lanzhou University , Lanzhou 730000 , P.R. China
| | - Xingang Xie
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering , Lanzhou University , Lanzhou 730000 , P.R. China
| | - Xuegong She
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering , Lanzhou University , Lanzhou 730000 , P.R. China
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39
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Jansana S, Coussanes G, Puig J, Diaba F, Bonjoch J. Synthesis of Azabicyclic Building Blocks for
Daphniphyllum
Alkaloid Intermediates Featuring
N
‐Trichloroacetyl Enamide 5‐
endo
‐
trig
Radical Cyclizations. Helv Chim Acta 2019. [DOI: 10.1002/hlca.201900188] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Sergi Jansana
- Laboratori de Química Orgànica, Facultat de Farmàcia, IBUBUniversitat de Barcelona Av. Joan XXIII s/n 08028 Barcelona Spain
| | - Guilhem Coussanes
- Laboratori de Química Orgànica, Facultat de Farmàcia, IBUBUniversitat de Barcelona Av. Joan XXIII s/n 08028 Barcelona Spain
- Syngenta Crop Protection AG Route de l'Ile au Bois–site chimique CH-1870 Monthey
| | - Jordi Puig
- Laboratori de Química Orgànica, Facultat de Farmàcia, IBUBUniversitat de Barcelona Av. Joan XXIII s/n 08028 Barcelona Spain
| | - Faiza Diaba
- Laboratori de Química Orgànica, Facultat de Farmàcia, IBUBUniversitat de Barcelona Av. Joan XXIII s/n 08028 Barcelona Spain
| | - Josep Bonjoch
- Laboratori de Química Orgànica, Facultat de Farmàcia, IBUBUniversitat de Barcelona Av. Joan XXIII s/n 08028 Barcelona Spain
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40
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Hugelshofer CL, Palani V, Sarpong R. Calyciphylline B-type Alkaloids: Evolution of a Synthetic Strategy to (−)-Daphlongamine H. J Org Chem 2019; 84:14069-14091. [DOI: 10.1021/acs.joc.9b02223] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Cedric L. Hugelshofer
- Department of Chemistry, University of California Berkeley, Berkeley, California 94720, United States
| | - Vignesh Palani
- Department of Chemistry, University of California Berkeley, Berkeley, California 94720, United States
| | - Richmond Sarpong
- Department of Chemistry, University of California Berkeley, Berkeley, California 94720, United States
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41
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Hayakawa I, Nagatani R, Ikeda M, Yoo DE, Saito K, Kigoshi H, Sakakura A. Toward the Synthesis of Yuzurimine-Type Alkaloids: Stereoselective Construction of the Heterocyclic Portions of Deoxyyuzurimine and Macrodaphnine. Org Lett 2019; 21:6337-6341. [PMID: 31361502 DOI: 10.1021/acs.orglett.9b02232] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The heterocyclic portions of yuzurimine-type alkaloids, such as deoxyyuzurimine and macrodaphnine, were synthesized by using a stereoselective hydroboration-oxidation reaction to install the C20 methyl group, the intramolecular Mitsunobu reaction to construct the E-ring portion, and the intramolecular SN2 reaction to construct the F-ring portion as key steps.
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Affiliation(s)
- Ichiro Hayakawa
- Division of Applied Chemistry, Graduate School of Natural Science and Technology , Okayama University , 3-1-1 Tsushima-naka , Kita-ku, Okayama 700-8530 , Japan
| | - Ryosuke Nagatani
- Division of Applied Chemistry, Graduate School of Natural Science and Technology , Okayama University , 3-1-1 Tsushima-naka , Kita-ku, Okayama 700-8530 , Japan
| | - Masaki Ikeda
- Division of Applied Chemistry, Graduate School of Natural Science and Technology , Okayama University , 3-1-1 Tsushima-naka , Kita-ku, Okayama 700-8530 , Japan
| | - Dong-Eun Yoo
- Division of Applied Chemistry, Graduate School of Natural Science and Technology , Okayama University , 3-1-1 Tsushima-naka , Kita-ku, Okayama 700-8530 , Japan
| | - Keita Saito
- Department of Chemistry, Graduate School of Pure and Applied Sciences , University of Tsukuba , 1-1-1 Tennodai , Tsukuba 305-8571 , Japan
| | - Hideo Kigoshi
- Department of Chemistry, Graduate School of Pure and Applied Sciences , University of Tsukuba , 1-1-1 Tennodai , Tsukuba 305-8571 , Japan
| | - Akira Sakakura
- Division of Applied Chemistry, Graduate School of Natural Science and Technology , Okayama University , 3-1-1 Tsushima-naka , Kita-ku, Okayama 700-8530 , Japan
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42
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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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43
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Sun H, Wu G, Xie X. Synthetic studies towards daphniyunnine B: Construction of AC bicyclic skeleton with two vicinal all carbon quaternary stereocenters. CHINESE CHEM LETT 2019. [DOI: 10.1016/j.cclet.2019.06.049] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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44
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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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45
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Zhang K, Cai L, Hong S, Kwon O. Phosphine-Catalyzed α-Umpolung-Aldol Reaction for the Synthesis of Benzo[ b]azapin-3-ones. Org Lett 2019; 21:5143-5146. [PMID: 31247774 PMCID: PMC7338222 DOI: 10.1021/acs.orglett.9b01749] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
A novel phosphine-catalyzed intermolecular cyclization between 2-sulfonamidobenzaldehyes and ynones is reported. This methodology serves as a conduit for the construction of benzo[ b]azepin-3-ones in good to excellent yields under mild conditions. The resulting 2-benzylidene moieties are formed exclusively in the E-configuration. Mechanistically, this unusual annulation occurs through a phosphine-catalyzed α-umpolung addition, followed by an aldol reaction. One of the benzo[ b]azepin-3-one products was converted to the core structure of 3-amino-[ a]benzazepin-2-one-1-alkanoic acids, many of which function as angiotensin-converting enzyme inhibitors.
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Affiliation(s)
- Kui Zhang
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095-1569, United States
| | - Lingchao Cai
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095-1569, United States
| | - Sooji Hong
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095-1569, United States
| | - Ohyun Kwon
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095-1569, United States
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46
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Nakamura H, Kawakami M, Tsukano C, Takemoto Y. Concise Construction of the ACDE Ring System of Calyciphylline A Type Alkaloids by a [5+2] Cycloaddition. Chemistry 2019; 25:8701-8704. [PMID: 31063603 DOI: 10.1002/chem.201901690] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2019] [Indexed: 12/27/2022]
Abstract
A concise route for construction of the ACDE ring skeleton in calyciphylline A type alkaloids was developed using an intramolecular [5+2] cycloaddition reaction of an oxidopyrylium species bearing a tetrasubstituted olefin. Key to the success of this reaction was the combination of acid and base, which accelerated the construction of this skeleton containing a spiro ring and vicinal quaternary carbon centers. The resultant tricyclic ADE ring compound was converted to an ACDE ring model through C-H oxidation and an aza-Wittig reaction.
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Affiliation(s)
- Hugh Nakamura
- Graduate School of Pharmaceutical Sciences, Kyoto University, Yoshida, Sakyo-ku, Kyoto, 606-8501, Japan
| | - Manami Kawakami
- Graduate School of Pharmaceutical Sciences, Kyoto University, Yoshida, Sakyo-ku, Kyoto, 606-8501, Japan
| | - Chihiro Tsukano
- Graduate School of Pharmaceutical Sciences, Kyoto University, Yoshida, Sakyo-ku, Kyoto, 606-8501, Japan
| | - Yoshiji Takemoto
- Graduate School of Pharmaceutical Sciences, Kyoto University, Yoshida, Sakyo-ku, Kyoto, 606-8501, Japan
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47
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Jansana S, Diaba F, Bonjoch J. Stereocontrolled Synthesis of the Daphenylline Pentacyclic ACDEF Ring System. Org Lett 2019; 21:5757-5761. [DOI: 10.1021/acs.orglett.9b02211] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sergi Jansana
- Laboratori de Química Orgànica, Facultat de Farmàcia, IBUB, Universitat de Barcelona, Av. Joan XXIII s/n, Barcelona 08028, Spain
| | - Faïza Diaba
- Laboratori de Química Orgànica, Facultat de Farmàcia, IBUB, Universitat de Barcelona, Av. Joan XXIII s/n, Barcelona 08028, Spain
| | - Josep Bonjoch
- Laboratori de Química Orgànica, Facultat de Farmàcia, IBUB, Universitat de Barcelona, Av. Joan XXIII s/n, Barcelona 08028, Spain
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48
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Chen Y, Hu J, Guo LD, Tian P, Xu T, Xu J. Synthesis of the Core Structure of Daphnimacropodines. Org Lett 2019; 21:4309-4312. [PMID: 31141376 DOI: 10.1021/acs.orglett.9b01486] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Daphniphyllum alkaloids daphnimacropodines A-C possess a highly congested ring system and share a common tetracyclic ring skeleton. To access the challenging chemical structure of daphnimacropodines, a divergent synthetic approach toward their total synthesis is described. A stereoselective synthesis of the core structure of daphnimacropodines has been achieved from a simple diketone building block. Our approach features an intramolecular carbamate aza-Michael addition and a hydropyrrole synthesis via a Au-catalyzed alkyne hydration followed by an aldol condensation, whereas all the other attempts failed.
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Affiliation(s)
- Yuye Chen
- Department of Chemistry and Shenzhen Grubbs Institute , Southern University of Science and Technology , Shenzhen , Guangdong 518055 , China.,State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences , University of Macau , Taipa , Macau 999078 , China
| | - Jingping Hu
- Department of Chemistry and Shenzhen Grubbs Institute , Southern University of Science and Technology , Shenzhen , Guangdong 518055 , China.,School of Chemistry and Chemical Engineering , Harbin Institute of Technology , Harbin , Heilongjiang 150006 , China
| | - Lian-Dong Guo
- Department of Chemistry and Shenzhen Grubbs Institute , Southern University of Science and Technology , Shenzhen , Guangdong 518055 , China
| | - Peilin Tian
- Department of Chemistry and Shenzhen Grubbs Institute , Southern University of Science and Technology , Shenzhen , Guangdong 518055 , China
| | - Tianyue Xu
- Department of Chemistry and Shenzhen Grubbs Institute , Southern University of Science and Technology , Shenzhen , Guangdong 518055 , China
| | - Jing Xu
- Department of Chemistry and Shenzhen Grubbs Institute , Southern University of Science and Technology , Shenzhen , Guangdong 518055 , China
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49
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Chen Y, Hu J, Guo L, Zhong W, Ning C, Xu J. A Concise Total Synthesis of (−)‐Himalensine A. Angew Chem Int Ed Engl 2019; 58:7390-7394. [DOI: 10.1002/anie.201902908] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2019] [Indexed: 12/14/2022]
Affiliation(s)
- Yuye Chen
- Department of Chemistry and Shenzhen Grubbs InstituteSouthern University of Science and Technology Shenzhen Guangdong China
- State Key Laboratory of Quality Research in Chinese MedicineInstitute of Chinese Medical SciencesUniversity of Macau China
| | - Jingping Hu
- Department of Chemistry and Shenzhen Grubbs InstituteSouthern University of Science and Technology Shenzhen Guangdong China
- School of Chemistry and Chemical EngineeringHarbin Institute of Technology Harbin Heilongjiang China
| | - Lian‐Dong Guo
- Department of Chemistry and Shenzhen Grubbs InstituteSouthern University of Science and Technology Shenzhen Guangdong China
| | - Weihe Zhong
- Department of Chemistry and Shenzhen Grubbs InstituteSouthern University of Science and Technology Shenzhen Guangdong China
| | - Chengqing Ning
- Department of Chemistry and Shenzhen Grubbs InstituteSouthern University of Science and Technology Shenzhen Guangdong China
- SUSTech Academy for Advanced Interdisciplinary Studies Shenzhen Guangdong China
| | - Jing Xu
- Department of Chemistry and Shenzhen Grubbs InstituteSouthern University of Science and Technology Shenzhen Guangdong China
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50
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Hugelshofer CL, Palani V, Sarpong R. Calyciphylline B-Type Alkaloids: Total Syntheses of (-)-Daphlongamine H and (-)-Isodaphlongamine H. J Am Chem Soc 2019; 141:8431-8435. [PMID: 31074980 DOI: 10.1021/jacs.9b03576] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
The first total synthesis of the complex hexacylic Daphniphyllum alkaloid (-)-daphlongamine H has been accomplished. Key to the success of the strategy are a complexity-building Mannich reaction, efficient cyclizations, and a highly diastereoselective hydrogenation to assemble multigram quantities of the tricyclic core bearing four contiguous stereocenters. Following construction of the hydro-indene substructure by means of a Pauson-Khand reaction, endgame redox manipulations delivered the natural product. Importantly, the synthetic studies have also given access to (-)-isodaphlongamine H and led to a revision of the reported structure of deoxyisocalyciphylline B.
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Affiliation(s)
- Cedric L Hugelshofer
- Department of Chemistry , University of California , Berkeley , California 94720 , United States
| | - Vignesh Palani
- Department of Chemistry , University of California , Berkeley , California 94720 , United States
| | - Richmond Sarpong
- Department of Chemistry , University of California , Berkeley , California 94720 , United States
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