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Expeditious Asymmetric Synthesis of Polypropionates Relying on Sulfur Dioxide-Induced C–C Bond Forming Reactions. Catalysts 2021. [DOI: 10.3390/catal11111267] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
For a long time, the organic chemistry of sulfur dioxide (SO2) consisted of sulfinates that react with carbon electrophiles to generate sulfones. With alkenes and other unsaturated compounds, SO2 generates polymeric materials such as polysulfones. More recently, H-ene, sila-ene and hetero-Diels–Alder reactions of SO2 have been realized under conditions that avoid polymer formation. Sultines resulting from the hetero-Diels–Alder reactions of conjugated dienes and SO2 are formed more rapidly than the corresponding more stable sulfolenes resulting from the cheletropic additions. In the presence of a protic or Lewis acid catalyst, the sultines derived from 1-alkoxydienes are ionized into zwitterionic intermediates bearing 1-alkoxyallylic cation moieties which react with electro-rich alkenes such as enol silyl ethers and allylsilanes with high stereoselectivity. (C–C-bond formation through Umpolung induced by SO2). This produces silyl sulfinates that react with carbon electrophiles to give sulfones (one-pot four component asymmetric synthesis of sulfones), or with Cl2, generating the corresponding sulfonamides that can be reacted in situ with primary and secondary amines (one-pot four component asymmetric synthesis of sulfonamides). Alternatively, Pd-catalyzed desulfinylation generates enantiomerically pure polypropionate stereotriads in one-pot operations. The chirons so obtained are flanked by an ethyl ketone moiety on one side and by a prop-1-en-1-yl carboxylate group on the other. They are ready for two-directional chain elongations, realizing expeditious synthesis of long-chain polypropionates and polyketides. The stereotriads have also been converted into simpler polypropionates such as the cyclohexanone moiety of baconipyrone A and B, Kishi’s stereoheptad unit of rifamycin S, Nicolaou’s C1–C11-fragment and Koert’s C16–CI fragment of apoptolidin A. This has also permitted the first total synthesis of (-)-dolabriferol.
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Palani V, Hugelshofer CL, Sarpong R. A Unified Strategy for the Enantiospecific Total Synthesis of Delavatine A and Formal Synthesis of Incarviatone A. J Am Chem Soc 2019; 141:14421-14432. [DOI: 10.1021/jacs.9b07693] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Vignesh Palani
- Department of Chemistry, University of California, Berkeley, Berkeley, California 94720, United States
| | - Cedric L. Hugelshofer
- 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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3
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Kim JY, Kang BC, Ryu DH. Catalytic Asymmetric Roskamp Reaction of Silyl Diazoalkane: Synthesis of Enantioenriched α-Silyl Ketone. Org Lett 2017; 19:5936-5939. [PMID: 29052993 DOI: 10.1021/acs.orglett.7b02928] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
A catalytic enantioselective Roskamp reaction of silyl diazoalkane to synthesize a highly optically active α-silyl ketone from aldehydes is described. In the presence of a chiral oxazaborolidinium ion catalyst, the reaction provides α-chiral silyl ketones with good yields (up to 97%) and high enantioselectivities (up to >99% ee). In addition, a one-pot procedure using an asymmetric Roskamp/reduction strategy gives highly optically active syn-β-hydroxysilane in good yields (up to 94%) with high enantioselectivities (up to 99% ee) and syn stereoselectivities (>20:1).
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Affiliation(s)
- Jae Yeon Kim
- Department of Chemistry, Sungkyunkwan University , Suwon, 440-746, Korea
| | - Byung Chul Kang
- Department of Chemistry, Sungkyunkwan University , Suwon, 440-746, Korea
| | - Do Hyun Ryu
- Department of Chemistry, Sungkyunkwan University , Suwon, 440-746, Korea
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4
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Zhu S, Wu Y. Synthesis and Configuration of Neomaclafungin A. Chem Asian J 2017; 12:2211-2215. [DOI: 10.1002/asia.201700950] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2017] [Revised: 07/06/2017] [Indexed: 01/25/2023]
Affiliation(s)
- Shijun Zhu
- State Key Laboratory of Bioorganic and Natural Products Chemistry; Collaborative Innovative Center for Chemistry and Life Sciences; Shanghai Institute of Organic Chemistry and the University of Chinese Academy of Sciences; Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 China
| | - Yikang Wu
- State Key Laboratory of Bioorganic and Natural Products Chemistry; Collaborative Innovative Center for Chemistry and Life Sciences; Shanghai Institute of Organic Chemistry and the University of Chinese Academy of Sciences; Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 China
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5
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Verification of oligomycin A structure: synthesis and biological evaluation of 33-dehydrooligomycin A. J Antibiot (Tokyo) 2017; 70:871-877. [PMID: 28420869 DOI: 10.1038/ja.2017.48] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2016] [Revised: 01/27/2017] [Accepted: 02/23/2017] [Indexed: 11/09/2022]
Abstract
Although, the structure of oligomycin A (1) was confirmed by spectroscopic and chemical evaluations, some crystallographic data cast doubt on the originally adopted structure of the side 2-hydroxypropyl moiety of this antibiotic. It was suggested that the side chain of the oligomycin is enol-related (2-hydroxy-1-propenyl). To clarify this matter we synthesized and evaluated 33-dehydrooligomycin A (2) prepared by the Kornblum oxidation of 33-O-mesyloligomycin A (3) by dimethyl sulfoxide. NMR data for 33-dehydrooligomycin (2) and results of quantum chemical calculations have shown that this derivative exists in the keto rather than in the enol tautomer 2a. The in vitro antimicrobial activity of 2 was approximately two times weaker in comparison with oligomycin A against Streptomyces fradiae ATCC-19609 and reference Candida spp. strains and similar activity against certain filamentous fungi. The docking binding estimate of 2 with FOF1ATP synthase showed a slight decrease in binding affinity for 2 when compared with oligomycin A; that correlated with its activity against S. fradiae ATCC 19609 that is supersensitive to oligomycin A. The in vitro antiproliferative activities of 2 are also discussed.
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An P, Huo Y, Chen Z, Song C, Ma Y. Metal-free enantioselective addition of nucleophilic silicon to aromatic aldehydes catalyzed by a [2.2]paracyclophane-based N-heterocyclic carbene catalyst. Org Biomol Chem 2017; 15:3202-3206. [DOI: 10.1039/c7ob00243b] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
A transition metal-free enantioselective 1,2-silylation of aromatic aldehydes to yield chiral α-hydroxysilanes was developed for the first time.
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Affiliation(s)
- Ping An
- School of Pharmaceutical Sciences
- Shandong University
- Jinan 250012
- P. R. China
| | - Yuwen Huo
- Department of Chemistry
- Shandong University
- Jinan 250100
- P. R. China
| | - Zhen Chen
- School of Chemistry and Chemical Engineering
- Hebei Normal University For Nationalities
- Chengde 0670000
- P. R. China
| | - Chun Song
- School of Pharmaceutical Sciences
- Shandong University
- Jinan 250012
- P. R. China
| | - Yudao Ma
- Department of Chemistry
- Shandong University
- Jinan 250100
- P. R. China
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Kumar P, Tripathi D, Sharma BM, Dwivedi N. Transition metal catalysis—a unique road map in the stereoselective synthesis of 1,3-polyols. Org Biomol Chem 2017; 15:733-761. [DOI: 10.1039/c6ob01925k] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
The present review summarizes recent diverse reactions employed in the formation of 1,3-polyols providing an overview of the mechanistic pathway and the enantioselectivity obtained, in terms of the properties of transition metals directly involved in the catalytic transformations and their interaction with various ligands.
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Affiliation(s)
- Pradeep Kumar
- Organic Chemistry Division
- CSIR-National Chemical Laboratory
- Pune 411008
- India
| | - Divya Tripathi
- Organic Chemistry Division
- CSIR-National Chemical Laboratory
- Pune 411008
- India
| | - Brijesh M. Sharma
- Organic Chemistry Division
- CSIR-National Chemical Laboratory
- Pune 411008
- India
| | - Namrata Dwivedi
- Organic Chemistry Division
- CSIR-National Chemical Laboratory
- Pune 411008
- India
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8
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Trost BM, Knopf JD, Brindle CS. Synthetic Strategies Employed for the Construction of Fostriecin and Related Natural Products. Chem Rev 2016; 116:15035-15088. [PMID: 28027648 PMCID: PMC5720176 DOI: 10.1021/acs.chemrev.6b00488] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Fostriecin and related natural products present a significant challenge for synthetic chemists due to their structural complexity and chemical sensitivity. This review will chronicle the successful efforts of synthetic chemists in the construction of these biologically active molecules. Key carbon-carbon bond forming reactions will be highlighted, as well as the methods used to install the numerous stereocenters present in this class of compounds.
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Affiliation(s)
- Barry M. Trost
- Department of Chemistry, Stanford University, Stanford, California 94305-5080, United States
| | - Joshua D. Knopf
- Department of Chemistry, Trinity College, 300 Summit Street, Hartford, Connecticut 06106, United States
| | - Cheyenne S. Brindle
- Department of Chemistry, Trinity College, 300 Summit Street, Hartford, Connecticut 06106, United States
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9
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Affiliation(s)
- Sunghyun Hwang
- Department
of Chemistry, Seoul National University, Seoul 08826, Republic of Korea
| | - Inhwan Baek
- Department
of Chemistry, Seoul National University, Seoul 08826, Republic of Korea
| | - Chulbom Lee
- Department
of Chemistry, Seoul National University, Seoul 08826, Republic of Korea
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10
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Ruiz J, Karre N, Roisnel T, Chandrasekhar S, Grée R. From Protectedβ-Hydroxy Acylsilanes to Functionalized Silyl Enol Ethers and Applications in Mukaiyama Aldol Reactions. European J Org Chem 2016. [DOI: 10.1002/ejoc.201501344] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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11
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Kitanosono T, Zhu L, Liu C, Xu P, Kobayashi S. An Insoluble Copper(II) Acetylacetonate–Chiral Bipyridine Complex that Catalyzes Asymmetric Silyl Conjugate Addition in Water. J Am Chem Soc 2015; 137:15422-5. [DOI: 10.1021/jacs.5b11418] [Citation(s) in RCA: 67] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Taku Kitanosono
- Department of Chemistry,
School of Science, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Lei Zhu
- Department of Chemistry,
School of Science, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Chang Liu
- Department of Chemistry,
School of Science, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Pengyu Xu
- Department of Chemistry,
School of Science, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Shu̅ Kobayashi
- Department of Chemistry,
School of Science, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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12
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Lee J, Panek JS. Synthesis of the C13–C29 fragment of leiodolide A: allylic asymmetric induction on the stereochemical course of iodolactonization. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.10.087] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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13
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Ward DE, Kundu D, Biniaz M, Jana S. A Systematic Study of the Effects of Relative Configuration, Protecting Group, and Enolate Type on the Diastereoselectivities of Aldol Reactions of a Chiral Ethyl Ketone with 2-Methylpropanal. J Org Chem 2014; 79:6868-94. [DOI: 10.1021/jo500927x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Dale E. Ward
- Department of Chemistry, University of Saskatchewan, 110
Science Place, Saskatoon, Saskatchewan S7N 5C9, Canada
| | - Diptarghya Kundu
- Department of Chemistry, University of Saskatchewan, 110
Science Place, Saskatoon, Saskatchewan S7N 5C9, Canada
| | - Mojtaba Biniaz
- Department of Chemistry, University of Saskatchewan, 110
Science Place, Saskatoon, Saskatchewan S7N 5C9, Canada
| | - Sushital Jana
- Department of Chemistry, University of Saskatchewan, 110
Science Place, Saskatoon, Saskatchewan S7N 5C9, Canada
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14
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Lee ASY, Wang SH, Chang YT. Synthesis of β-Haloketones by β-Addition Reactions of α,β-Unsaturated Ketones with BX3(X = Br, Cl) as Halide Source. J CHIN CHEM SOC-TAIP 2013. [DOI: 10.1002/jccs.201300394] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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15
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Ding F, William R, Leow ML, Chai H, Fong JZM, Liu XW. Directed Orthometalation and the Asymmetric Total Synthesis of N-Deoxymilitarinone A and Torrubiellone B. Org Lett 2013; 16:26-9. [DOI: 10.1021/ol402820d] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Feiqing Ding
- Division
of Chemistry and Biological Chemistry, School of Physical
and Mathematical Sciences, Nanyang Technological University, Singapore 637371
| | - Ronny William
- Division
of Chemistry and Biological Chemistry, School of Physical
and Mathematical Sciences, Nanyang Technological University, Singapore 637371
| | - Min Li Leow
- Division
of Chemistry and Biological Chemistry, School of Physical
and Mathematical Sciences, Nanyang Technological University, Singapore 637371
| | - Hua Chai
- Division
of Chemistry and Biological Chemistry, School of Physical
and Mathematical Sciences, Nanyang Technological University, Singapore 637371
| | - Jacqueline Zi Mei Fong
- Division
of Chemistry and Biological Chemistry, School of Physical
and Mathematical Sciences, Nanyang Technological University, Singapore 637371
| | - Xue-Wei Liu
- Division
of Chemistry and Biological Chemistry, School of Physical
and Mathematical Sciences, Nanyang Technological University, Singapore 637371
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16
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Zhu HT, Wang J, Qiu ZH, Wang LJ, Zhong MJ, Liu XY, Liang YM. Electrophile-Promoted Tandem Cyclization of α,β-Diynyl Ketodiols: A Facile Synthesis of Tetrahalogenated Spiroketals. ASIAN J ORG CHEM 2013. [DOI: 10.1002/ajoc.201300202] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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17
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Lee ASY, Lin MC, Lin CC, Chang YT. Me3SiOTf Promoted Aza-Michael Addition Reaction of 1°-Amides with α,β-Unsaturated Ketones. J CHIN CHEM SOC-TAIP 2013. [DOI: 10.1002/jccs.201000110] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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18
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Zimmermann N, Pinard P, Carboni B, Gosselin P, Gaulon-Nourry C, Dujardin G, Collet S, Lebreton J, Mathé-Allainmat M. Convergent Strategy Towards the Synthesis of Restricted Analogues of Peloruside A. European J Org Chem 2013. [DOI: 10.1002/ejoc.201201728] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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19
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Raghavan S, Vinoth Kumar V. A stereoselective synthesis of the C9–C19 subunit of (+)-peloruside A. Org Biomol Chem 2013; 11:2847-58. [DOI: 10.1039/c3ob27508f] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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20
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Affiliation(s)
- Dale E. Ward
- Department of Chemistry, University of Saskatchewan, 110 Science Place, Saskatoon SK S7N 5C9, Canada
| | - M. Mehdi Zahedi
- Department of Chemistry, University of Saskatchewan, 110 Science Place, Saskatoon SK S7N 5C9, Canada
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21
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Saha J, Lorenc C, Surana B, Peczuh MW. Discovery of a Phosphine-Mediated Cycloisomerization of Alkynyl Hemiketals: Access to Spiroketals and Dihydropyrazoles via Tandem Reactions. J Org Chem 2012; 77:3846-58. [PMID: 22428530 DOI: 10.1021/jo3001854] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Jaideep Saha
- Department of Chemistry, University of Connecticut, 55 North Eagleville Road U3060, Storrs,
Connecticut 06269, United States
| | - Chris Lorenc
- Department of Chemistry, University of Connecticut, 55 North Eagleville Road U3060, Storrs,
Connecticut 06269, United States
| | - Bikash Surana
- Department of Chemistry, University of Connecticut, 55 North Eagleville Road U3060, Storrs,
Connecticut 06269, United States
| | - Mark W. Peczuh
- Department of Chemistry, University of Connecticut, 55 North Eagleville Road U3060, Storrs,
Connecticut 06269, United States
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22
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Jessen HJ, Schumacher A, Schmid F, Pfaltz A, Gademann K. Catalytic Enantioselective Total Synthesis of (+)-Torrubiellone C. Org Lett 2011; 13:4368-70. [DOI: 10.1021/ol201692h] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Henning J. Jessen
- University of Basel, Department of Chemistry, 4056 Basel, Switzerland
| | | | - Fabian Schmid
- University of Basel, Department of Chemistry, 4056 Basel, Switzerland
| | - Andreas Pfaltz
- University of Basel, Department of Chemistry, 4056 Basel, Switzerland
| | - Karl Gademann
- University of Basel, Department of Chemistry, 4056 Basel, Switzerland
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23
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Chan DG, Winternheimer DJ, Merlic CA. Enol silyl ethers via copper(II)-catalyzed C-O bond formation. Org Lett 2011; 13:2778-81. [PMID: 21510621 DOI: 10.1021/ol2009297] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Copper(II) acetate catalyzes the coupling of pinacol vinylboronates with silanols producing enol silyl ethers. This represents a novel enol silyl ether synthesis via formation of the C-O bond instead of the conventional Si-O bond. This also constitutes the first transition-metal-catalyzed oxidative cross-coupling with silanols.
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Affiliation(s)
- Daniel G Chan
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095-1569, United States
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24
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Ollivier A, Sinibaldi ME, Toupet L, Traïkia M, Canet I. An entry to 1,6-dioxaspiro[4.6]undecanes and 1,7-dioxaspiro[5.6]dodecanes. Tetrahedron Lett 2010. [DOI: 10.1016/j.tetlet.2010.06.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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25
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Lazny R, Nodzewska A. N,N-Dialkylhydrazones in Organic Synthesis. From Simple N,N-Dimethylhydrazones to Supported Chiral Auxiliaries. Chem Rev 2009; 110:1386-434. [PMID: 20000672 DOI: 10.1021/cr900067y] [Citation(s) in RCA: 199] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ryszard Lazny
- Institute of Chemistry, University of Bialystok, ul. Hurtowa 15-399, Bialystok, Poland
| | - Aneta Nodzewska
- Institute of Chemistry, University of Bialystok, ul. Hurtowa 15-399, Bialystok, Poland
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26
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Lysenkova LN, Turchin KF, Danilenko VN, Korolev AM, Preobrazhenskaya MN. The first examples of chemical modification of oligomycin A. J Antibiot (Tokyo) 2009; 63:17-22. [DOI: 10.1038/ja.2009.112] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Abstract
We report the determination of the full stereostructure of (-)-ushikulide A (1), a spiroketal containing macrolide by total synthesis. Ushikulide A (1) was isolated from a culture broth of Streptomyces sp. IUK-102 and exhibits potent immunosuppressant activity (IC(50) = 70 nM). To embark upon an ushikulide A synthesis, a tentative assignment was made based on analogy to cytovaricin (2), a related macrolide isolated from a culture of Streptomyces diastatochromogenes whose full structure was previously established via synthesis and X-ray crystallography. This report delineates studies on several key steps, namely a direct aldol reaction catalyzed by the dinuclear zinc ProPhenol complex, a metal catalyzed spiroketalization, as well as application of an unprecedented asymmetric alkynylation of a simple saturated aldehyde with methyl propiolate to prepare the nucleophilic partner for a Marshall-Tamaru propargylation. These studies culminated in the first total synthesis and stereochemical assignment of (-)-ushikulide A and significantly extended the scope of the above-mentioned methodologies.
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Affiliation(s)
- Barry M. Trost
- Department of Chemistry, Stanford University, Stanford, California, 94305-5080
| | - Brendan M. O’Boyle
- Department of Chemistry, Stanford University, Stanford, California, 94305-5080
| | - Daniel Hund
- Department of Chemistry, Stanford University, Stanford, California, 94305-5080
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28
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Helmboldt H, Hiersemann M. Synthetic Studies toward Jatrophane Diterpenes from Euphorbia characias. Enantioselective Synthesis of (−)-15-O-Acetyl-3-O-propionyl-17-norcharaciol. J Org Chem 2009; 74:1698-708. [DOI: 10.1021/jo802581g] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hannes Helmboldt
- Fakultät Chemie, Technische Universität Dortmund, Dortmund 44227, Germany
| | - Martin Hiersemann
- Fakultät Chemie, Technische Universität Dortmund, Dortmund 44227, Germany
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29
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Miyashita K, Tsunemi T, Hosokawa T, Ikejiri M, Imanishi T. Total Synthesis of Leustroducsin B. J Org Chem 2008; 73:5360-70. [DOI: 10.1021/jo8005599] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kazuyuki Miyashita
- Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamadaoka, Suita, Osaka 565-0871, Japan, and Faculty of Pharmacy, Osaka Ohtani University, 3-11-1 Nishikiori-kita, Tondabayashi, Osaka 584-8540, Japan
| | - Tomoyuki Tsunemi
- Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamadaoka, Suita, Osaka 565-0871, Japan, and Faculty of Pharmacy, Osaka Ohtani University, 3-11-1 Nishikiori-kita, Tondabayashi, Osaka 584-8540, Japan
| | - Takafumi Hosokawa
- Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamadaoka, Suita, Osaka 565-0871, Japan, and Faculty of Pharmacy, Osaka Ohtani University, 3-11-1 Nishikiori-kita, Tondabayashi, Osaka 584-8540, Japan
| | - Masahiro Ikejiri
- Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamadaoka, Suita, Osaka 565-0871, Japan, and Faculty of Pharmacy, Osaka Ohtani University, 3-11-1 Nishikiori-kita, Tondabayashi, Osaka 584-8540, Japan
| | - Takeshi Imanishi
- Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamadaoka, Suita, Osaka 565-0871, Japan, and Faculty of Pharmacy, Osaka Ohtani University, 3-11-1 Nishikiori-kita, Tondabayashi, Osaka 584-8540, Japan
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Yu W, Williams L, Malveaux E, Camp VM, Olson JJ, Goodman MM. Synthesis and evaluation of [123I] labeled iodovinyl amino acids syn-, anti-1-amino-3-[2-iodoethenyl]-cyclobutane-1-carboxylic acid, and 1-amino-3-iodomethylene-cyclobutane-1-carboxylic acid as potential SPECT brain tumor imaging agents. Bioorg Med Chem Lett 2008; 18:1264-8. [PMID: 18258425 PMCID: PMC2362394 DOI: 10.1016/j.bmcl.2008.01.035] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2007] [Revised: 01/08/2008] [Accepted: 01/10/2008] [Indexed: 10/22/2022]
Abstract
syn- and anti-1-amino-3-[2-iodoethenyl]-cyclobutane-1-carboxylic acid (syn-, anti-IVACBC 16, 17) and their analogue 1-amino-3-iodomethylene-cyclobutane-1-carboxylic acid (gem-IVACBC 18) were synthesized and radioiodoinated with [(123)I] in 34-43% delay-corrected yield. All these amino acids entered 9L gliosarcoma cells primarily via L-type transport in vitro with high uptake of 8-10% ID/1 x 10(6) cells. Biodistribution studies of [(123)I]16, 17 and 18 in rats with 9L gliosarcoma brain tumors demonstrated high tumor to brain ratios (4.7-7.3:1 at 60 min post-injection). In this model, syn-, anti-, and gem-[(123)I]IVACBC are promising radiotracers for SPECT brain tumor imaging.
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Affiliation(s)
- Weiping Yu
- Department of Radiology, Emory University, School of Medicine, Atlanta, GA 30322, USA
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Yu W, McConathy J, Olson J, Camp VM, Goodman MM. Facile Stereospecific Synthesis and Biological Evaluation of (S)- and (R)-2-Amino-2-methyl-4-[123I]iodo-3-(E)-butenoic Acid for Brain Tumor Imaging with Single Photon Emission Computerized Tomography. J Med Chem 2007; 50:6718-21. [DOI: 10.1021/jm070476u] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Weiping Yu
- Departments of Radiology and Neurosurgery, Emory University, Atlanta, Georgia 30322
| | - Jonathan McConathy
- Departments of Radiology and Neurosurgery, Emory University, Atlanta, Georgia 30322
| | - Jeffrey Olson
- Departments of Radiology and Neurosurgery, Emory University, Atlanta, Georgia 30322
| | - Vernon M. Camp
- Departments of Radiology and Neurosurgery, Emory University, Atlanta, Georgia 30322
| | - Mark M. Goodman
- Departments of Radiology and Neurosurgery, Emory University, Atlanta, Georgia 30322
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Wagenaar MM, Williamson RT, Ho DM, Carter GT. Structure and absolute stereochemistry of 21-hydroxyoligomycin A. JOURNAL OF NATURAL PRODUCTS 2007; 70:367-71. [PMID: 17249728 DOI: 10.1021/np060519u] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
21-Hydroxyoligomycin A (1) was isolated from Streptomyces cyaneogriseus ssp. noncyanogenus (LL-F28249) and fully characterized by NMR and single-crystal X-ray diffraction methods. The complete 1H and 13C NMR chemical shift assignments for 1 were made using 2D NMR experiments, and the chirality at C-21 was deduced to be R from a J-based configuration analysis. The absolute configuration at C-21 and at the other 18 chiral centers in the molecule were independently confirmed by anomalous dispersion measurements on a crystal of the chloroform methanol solvate of 21-hydroxyoligomycin A (1).
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Abstract
The size and positioning of substituents on a tetraene, along with the Woodward-Hoffmann rules, control the relative stereochemistry at the four adjacent chiral centers that are generated in the 8pi/6pi electrocyclization cascade. A biomimetic synthesis of (-)-SNF4435 C and (+)-SNF4435 D exploits these steric effects and allows confirmation of the predicted absolute stereochemistry of the natural products.
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Affiliation(s)
- Kathlyn A Parker
- Department of Chemistry, State University of New York at Stony Brook, Stoney Brook, New York 11794-3400, USA.
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Liu B, Zhou WS. Toward the Total Synthesis of Natural Peloruside A: Stereoselective Synthesis of the Backbone of the Core. Org Lett 2003; 6:71-4. [PMID: 14703353 DOI: 10.1021/ol036058a] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
[reaction: see text] An asymmetric synthesis of the backbone of the core of natural peloruside A is described. Key elements include reiterative application of enantioselective allylation to establish the stereochemistry of the backbone and a double asymmetric aldol reaction to successfully couple two fragments.
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Affiliation(s)
- Bo Liu
- Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 354 Fenglin Road, Shanghai 200032, P. R. China
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Liu P, Binnun ED, Schaus JV, Valentino NM, Panek JS. Stereoselective additions of chiral (E)-crotylsilanes to thionium ions: asymmetric synthesis of homoallylic thioethers. J Org Chem 2002; 67:1705-7. [PMID: 11871910 DOI: 10.1021/jo011025z] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Stereochemically well-defined homoallylic thioethers 3 are synthesized via Lewis acid promoted condensation reaction between chiral organosilane reagents 2 and in situ generated thionium ions. The stereochemical course of the reaction is consistent with earlier reports concerning crotylsilations of oxonium ions.
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Affiliation(s)
- Ping Liu
- Department of Chemistry and Center for Streamline Synthesis, Metcalf Center for Science and Engineering, 590 Commonwealth Avenue, Boston University, Boston, Massachusetts 02215, USA
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White JD, Hanselmann R, Jackson RW, Porter WJ, Ohba Y, Tiller T, Wang S. Total synthesis of rutamycin B, a macrolide antibiotic from Streptomyces aureofaciens. J Org Chem 2001; 66:5217-31. [PMID: 11463276 DOI: 10.1021/jo0104429] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Rutamycin B (2) was synthesized from three principal subunits, spiroketal 75, keto aldehyde 83, and aldehyde 108. First, triol 62 was assembled by Julia coupling of sulfone 56 with aldehyde 58 followed by an acid-catalyzed spiroketalization. The three hydroxyl functions of 62 were successfully differentiated, leading to phosphonate 75. The latter was condensed in a Wadsworth-Emmons reaction with 83, prepared in six steps from (R)-aldehyde 76, to give 92. Coupling of the titanium enolate of 92 with 108 afforded Felkin product 109 with high stereoselectivity in a process that is critically dependent on the presence of the p-methoxybenzyl ether in the aldehyde. Transformation of 109 via aldehyde 116 to vinylboronate 122 was followed by macrocyclization under Suzuki conditions to yield 123. Exhaustive desilylation of the latter yielded rutamycin B.
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Affiliation(s)
- J D White
- Department of Chemistry, Oregon State University, Corvallis, Oregon 97331-4003, USA.
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