1
|
Huang J, Bao W, Huang S, Yang W, Lizhi Z, Du G, Lee CS. Formal Synthesis of (+)-Phomactin A. Org Lett 2018; 20:7466-7469. [DOI: 10.1021/acs.orglett.8b03242] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Junrong Huang
- Key State Laboratory of Chemical Cancer Genomics, Peking University Shenzhen Graduate School, Shenzhen University Town, Xili, Shenzhen 518055, China
| | - Wenli Bao
- Key State Laboratory of Chemical Cancer Genomics, Peking University Shenzhen Graduate School, Shenzhen University Town, Xili, Shenzhen 518055, China
| | - Shuangping Huang
- Key State Laboratory of Chemical Cancer Genomics, Peking University Shenzhen Graduate School, Shenzhen University Town, Xili, Shenzhen 518055, China
| | - Wei Yang
- Key State Laboratory of Chemical Cancer Genomics, Peking University Shenzhen Graduate School, Shenzhen University Town, Xili, Shenzhen 518055, China
| | - Zhu Lizhi
- Key State Laboratory of Chemical Cancer Genomics, Peking University Shenzhen Graduate School, Shenzhen University Town, Xili, Shenzhen 518055, China
| | - Guangyan Du
- Key State Laboratory of Chemical Cancer Genomics, Peking University Shenzhen Graduate School, Shenzhen University Town, Xili, Shenzhen 518055, China
| | - Chi-Sing Lee
- Key State Laboratory of Chemical Cancer Genomics, Peking University Shenzhen Graduate School, Shenzhen University Town, Xili, Shenzhen 518055, China
- Institute of Research and Continuing Edition (Shenzhen), Hong Kong Baptist University, Industrialization Complex Building, Shenzhen Virtual
University Park, Shenzhen 518000, China
- Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong SAR, China
| |
Collapse
|
2
|
Hack D, Blümel M, Chauhan P, Philipps AR, Enders D. Catalytic Conia-ene and related reactions. Chem Soc Rev 2015; 44:6059-93. [PMID: 26031492 DOI: 10.1039/c5cs00097a] [Citation(s) in RCA: 101] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Since its initial inception, the Conia-ene reaction, known as the intramolecular addition of enols to alkynes or alkenes, has experienced a tremendous development and appealing catalytic protocols have emerged. This review fathoms the underlying mechanistic principles rationalizing how substrate design, substrate activation, and the nature of the catalyst work hand in hand for the efficient synthesis of carbocycles and heterocycles at mild reaction conditions. Nowadays, Conia-ene reactions can be found as part of tandem reactions, and the road for asymmetric versions has already been paved. Based on their broad applicability, Conia-ene reactions have turned into a highly appreciated synthetic tool with impressive examples in natural product synthesis reported in recent years.
Collapse
Affiliation(s)
- Daniel Hack
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany.
| | | | | | | | | |
Collapse
|
3
|
Du G, Bao W, Huang J, Huang S, Yue H, Yang W, Zhu L, Liang Z, Lee CS. Enantioselective Synthesis of the ABC-Tricyclic Core of Phomactin A by a γ-Hydroxylation Strategy. Org Lett 2015; 17:2062-5. [DOI: 10.1021/acs.orglett.5b00586] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Guangyan Du
- Laboratory of Chemical Genomics,
School of Chemical Biology and Biotechnology, Peking University Shenzhen
Graduate School, Shenzhen University Town, Xili, Shenzhen 518055, China
| | - Wenli Bao
- Laboratory of Chemical Genomics,
School of Chemical Biology and Biotechnology, Peking University Shenzhen
Graduate School, Shenzhen University Town, Xili, Shenzhen 518055, China
| | - Junrong Huang
- Laboratory of Chemical Genomics,
School of Chemical Biology and Biotechnology, Peking University Shenzhen
Graduate School, Shenzhen University Town, Xili, Shenzhen 518055, China
| | - Shuangping Huang
- Laboratory of Chemical Genomics,
School of Chemical Biology and Biotechnology, Peking University Shenzhen
Graduate School, Shenzhen University Town, Xili, Shenzhen 518055, China
| | - Hong Yue
- Laboratory of Chemical Genomics,
School of Chemical Biology and Biotechnology, Peking University Shenzhen
Graduate School, Shenzhen University Town, Xili, Shenzhen 518055, China
| | - Wei Yang
- Laboratory of Chemical Genomics,
School of Chemical Biology and Biotechnology, Peking University Shenzhen
Graduate School, Shenzhen University Town, Xili, Shenzhen 518055, China
| | - Lizhi Zhu
- Laboratory of Chemical Genomics,
School of Chemical Biology and Biotechnology, Peking University Shenzhen
Graduate School, Shenzhen University Town, Xili, Shenzhen 518055, China
| | - Zhenhao Liang
- Laboratory of Chemical Genomics,
School of Chemical Biology and Biotechnology, Peking University Shenzhen
Graduate School, Shenzhen University Town, Xili, Shenzhen 518055, China
| | - Chi-Sing Lee
- Laboratory of Chemical Genomics,
School of Chemical Biology and Biotechnology, Peking University Shenzhen
Graduate School, Shenzhen University Town, Xili, Shenzhen 518055, China
| |
Collapse
|
4
|
Ciesielski J, Frontier A. The Phomactin Natural Products from Isolation to Total Synthesis: A Review. ORG PREP PROCED INT 2014. [DOI: 10.1080/00304948.2014.903142] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
5
|
Buchanan GS, Cole KP, Li G, Tang Y, You LF, Hsung RP. Constructing the Architecturally Distinctive ABD-Tricycle of Phomactin A through an Intramolecular Oxa-[3 + 3] Annulation Strategy. Tetrahedron 2011; 67:10105-10118. [PMID: 23750054 PMCID: PMC3676308 DOI: 10.1016/j.tet.2011.09.111] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Our efforts in constructing the ABD-ring of phomactin A through an intramolecular oxa-[3 + 3] annulation strategy is described. This struggle entailed finding a practical and efficient preparation of annulation precursor, and a realization of the unexpected competing regioisomeric pathway. The success entailed accessing the A-ring through Diels-Alder cycloaddition of Rawal's diene. Furthermore, the discovery that the regioisomers from the annulation existed as atropisomers with respect to the D-ring olefin and that they could be equilibrated to the desired ABD-tricycle, allowing large quantities of tricycle to be accessed.
Collapse
Affiliation(s)
- Grant S Buchanan
- Division of Pharmaceutical Sciences and Department of Chemistry, University of Wisconsin, Madison, WI 53705 USA
| | | | | | | | | | | |
Collapse
|
6
|
Buchanan GS, Cole KP, Tang Y, Hsung RP. Total synthesis of (±)-phomactin A. Lessons learned from respecting a challenging structural topology. J Org Chem 2011; 76:7027-39. [PMID: 21819039 PMCID: PMC3163054 DOI: 10.1021/jo200936r] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Our struggles and ultimate success in achieving a total synthesis of phomactin A are described. Our strategy features an intramolecular oxa-[3 + 3] annulation to construct its unique ABD-tricyclic manifold. Although the synthesis would constitute a distinctly new approach with the 12-membered D-ring of phomactin A being assembled simultaneously with the 1-oxadecalin at an early stage, the ABD-tricycle represents a unique structural topology that would pose a number of unprecedented challenges. One challenge concerned elaborating this tricycle to have oxygenation at the proper carbon atoms. To overcome this, we would utilize a Kornblum-DeLaMare ring-opening of a peroxide bridge as well as a challenging late-stage 1,3-allylic alcohol transposition. Further, the structural intricacies of the ABD-tricycle were uncovered by a conformational analysis that would be critical for the C5a-homologation.
Collapse
Affiliation(s)
- Grant S. Buchanan
- Division of Pharmaceutical Sciences and Department of Chemistry University of Wisconsin, Madison, WI 53705
| | - Kevin P. Cole
- Chemical Product R&D, Eli Lilly and Company, Indianapolis, IN 46284
| | - Yu Tang
- School of Pharmaceutical Science and Technology, Tianjin University, Tianjin, 300072 P. R. China
| | - Richard P. Hsung
- Division of Pharmaceutical Sciences and Department of Chemistry University of Wisconsin, Madison, WI 53705
| |
Collapse
|
7
|
Huang S, Du G, Lee CS. Construction of the Tricyclic Furanochroman Skeleton of Phomactin A via the Prins/Conia-Ene Cascade Cyclization Approach. J Org Chem 2011; 76:6534-41. [DOI: 10.1021/jo200644t] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Shuangping Huang
- Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, Shenzhen University Town, Xili, Shenzhen 518055, China
| | - Guangyan Du
- Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, Shenzhen University Town, Xili, Shenzhen 518055, China
| | - Chi-Sing Lee
- Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, Shenzhen University Town, Xili, Shenzhen 518055, China
| |
Collapse
|
8
|
Abstract
A total synthesis of (+/-)-phomactin A is described to highlight the final completion of a complex natural product target that had commenced with an intramolecular oxa-[3 + 3] annulation strategy in the construction of the ABD-tricycle. These efforts reveal structural intricacies of this ABD-tricycle with an illustrative example being the conformational analysis that was ultimately critical for the C5a-homolgation.
Collapse
Affiliation(s)
- Yu Tang
- Division of Pharmaceutical Sciences and Department of Chemistry, University of Wisconsin, Madison, WI 53705
| | - Kevin P. Cole
- Division of Pharmaceutical Sciences and Department of Chemistry, University of Wisconsin, Madison, WI 53705
| | - Grant S. Buchanan
- Division of Pharmaceutical Sciences and Department of Chemistry, University of Wisconsin, Madison, WI 53705
| | - Gang Li
- Division of Pharmaceutical Sciences and Department of Chemistry, University of Wisconsin, Madison, WI 53705
| | - Richard P. Hsung
- Division of Pharmaceutical Sciences and Department of Chemistry, University of Wisconsin, Madison, WI 53705
| |
Collapse
|
9
|
You LF, Hsung RP, Bedermann AA, Kurdyumov AV, Tang Y, Buchanan GS, Cole KP. An Enantioselective Synthesis of the ABD Tricycle for (-)-Phomactin A Featuring Rawal's Asymmetric Diels-Alder Cycloaddition. Adv Synth Catal 2008; 350:10.1002/adsc.200800552. [PMID: 24273477 PMCID: PMC3834967 DOI: 10.1002/adsc.200800552] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
An enantioselective synthesis of the ABD-ring of (-)-phomactin A is described here. The sequence features Rawal's asymmetric Diels-Alder cycloaddition. The overall length is significantly reduced from our previous attempt.
Collapse
Affiliation(s)
- Ling-Feng You
- Division of Pharmaceutical Sciences and Department of Chemistry, Rennebohm Hall, 777 Highland Avenue, University of Wisconsin, Madison, WI 53705
| | - Richard P. Hsung
- Division of Pharmaceutical Sciences and Department of Chemistry, Rennebohm Hall, 777 Highland Avenue, University of Wisconsin, Madison, WI 53705
| | - Aaron A. Bedermann
- Division of Pharmaceutical Sciences and Department of Chemistry, Rennebohm Hall, 777 Highland Avenue, University of Wisconsin, Madison, WI 53705
| | - Aleksey V. Kurdyumov
- Division of Pharmaceutical Sciences and Department of Chemistry, Rennebohm Hall, 777 Highland Avenue, University of Wisconsin, Madison, WI 53705
| | - Yu Tang
- Division of Pharmaceutical Sciences and Department of Chemistry, Rennebohm Hall, 777 Highland Avenue, University of Wisconsin, Madison, WI 53705
| | - Grant S. Buchanan
- Division of Pharmaceutical Sciences and Department of Chemistry, Rennebohm Hall, 777 Highland Avenue, University of Wisconsin, Madison, WI 53705
| | - Kevin P. Cole
- Division of Pharmaceutical Sciences and Department of Chemistry, Rennebohm Hall, 777 Highland Avenue, University of Wisconsin, Madison, WI 53705
| |
Collapse
|
10
|
Goldring WPD, Alexander SPH, Kendall DA, Pattenden G. Novel phomactin analogues as PAF receptor ligands. Bioorg Med Chem Lett 2005; 15:3263-6. [PMID: 15922596 DOI: 10.1016/j.bmcl.2005.04.048] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2005] [Accepted: 04/25/2005] [Indexed: 11/16/2022]
Abstract
A range of natural and unnatural phomactins, recently synthesised in our laboratory, were found to exhibit PAF antagonism with pIC(50) values in the range 5.6-6.2. The variation in structural and stereochemical features between the phomactins was found to have only a modest effect on the inhibition of binding of PAF to its human platelet receptors.
Collapse
Affiliation(s)
- William P D Goldring
- School of Chemistry, The University of Nottingham, University Park, Nottingham NG7 2RD, UK
| | | | | | | |
Collapse
|