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Friedrich RM, Friestad GK. Inspirations from tetrafibricin and related polyketides: new methods and strategies for 1,5-polyol synthesis. Nat Prod Rep 2020; 37:1229-1261. [PMID: 32412021 DOI: 10.1039/c9np00070d] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Covering: up to 2019 Selective synthesis with control of remote stereogenic centers has long been a challenge in organic chemistry. In recent years the interest in this topic has been energized by isolation and synthetic studies of tetrafibricin and other natural products containing 1,5-polyols, such as amphidinol 3, marinomycins, and caylobolide. Here we discuss recent developments in 1,5-polyol synthesis, including an overview of selected bioactive natural products in this class and examples of new synthetic methodologies and strategies dedicated to remote stereocontrol in these structures. To illustrate in greater depth, we review several instructive examples of how these innovations have been applied in synthetic studies on tetrafibricin.
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Affiliation(s)
- Ryan M Friedrich
- Department of Chemistry, University of Iowa, Iowa City, Iowa 52242, USA.
| | - Gregory K Friestad
- Department of Chemistry, University of Iowa, Iowa City, Iowa 52242, USA.
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Rahman MA, Reddy NM, Yadav JS. Progress towards the Synthesis of (‐)‐Ushikulide A: Synthesis of C1‐C15 Aliphatic and C17‐C31 Spiroketal Fragments by an Aldol Approach. ChemistrySelect 2019. [DOI: 10.1002/slct.201900252] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Mohammad Ataur Rahman
- Centre for Semiochemicals DivisionCSIR-Indian Institute of Chemical Technology Hyderabad
- Department of Chemistry and Chemical BiologyHarvard University, Cambridge Massachusetts 02138 United States
| | - N. Mallikarjuna Reddy
- Centre for Semiochemicals DivisionCSIR-Indian Institute of Chemical Technology Hyderabad
| | - Jhillu Singh Yadav
- Centre for Semiochemicals DivisionCSIR-Indian Institute of Chemical Technology Hyderabad
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Friedrich RM, Bell JQ, Garcia A, Shen Z, Friestad GK. Unified Strategy for 1,5,9- and 1,5,7-Triols via Configuration-Encoded 1,5-Polyol Synthesis: Preparation and Coupling of C15-C25 and C26-C40 Fragments of Tetrafibricin. J Org Chem 2018; 83:13650-13669. [PMID: 30372076 DOI: 10.1021/acs.joc.8b02034] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Diverse classes of natural products contain chiral 1,5,9- and 1,5,7-triol stereotriads, including the novel fibrinogen receptor antagonist tetrafibricin. Biological activities associated with compounds containing these motifs warrant targeted synthetic strategies to 1,5-polyol families from cheap and easily accessible reagents while avoiding the need to determine configurations at each alcohol stereocenter. In the accompanying paper, we present a solution to these problems via an iterative configuration-encoded strategy that exploits Julia-Kocienski couplings of enantiopure α-silyloxy-γ-sulfononitrile building blocks. The stereocontrol is unambiguous, and the building blocks are available in multigram quantities via asymmetric catalysis. This approach efficiently accessed a C26-C40 subunit of tetrafibricin that contains a syn, syn-1,5,9-triol and all of the stereochemistry and functionality needed to advance toward tetrafibricin. A modification afforded the anti, syn-1,5,7-triol within the C15-C25 fragment of tetrafibricin by merging 1,5-polyol synthesis with diastereoselective intramolecular conjugate addition. The union of the C15-C25 and C26-C40 fragments was achieved via a BF3·OEt2-mediated Mukaiyama aldol construction with high 1,3- anti stereoinduction, revealing some unexpected insights on the impact of silyl protecting groups on 1,3- anti diastereocontrol by a β-siloxyaldehyde aldol acceptor. Directed 1,3- anti reduction completed the stereostructure of the C15-C40 portion of tetrafibricin, with configurations established by a combination of NMR experiments.
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Affiliation(s)
- Ryan M Friedrich
- Department of Chemistry , University of Iowa , Iowa City , Iowa 52242 , United States
| | - Jay Q Bell
- Department of Chemistry , University of Iowa , Iowa City , Iowa 52242 , United States
| | - Alfredo Garcia
- Department of Chemistry , University of Iowa , Iowa City , Iowa 52242 , United States
| | - Zican Shen
- Department of Chemistry , University of Iowa , Iowa City , Iowa 52242 , United States
| | - Gregory K Friestad
- Department of Chemistry , University of Iowa , Iowa City , Iowa 52242 , United States
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Friedrich RM, Sreenilayam G, Hackbarth J, Friestad GK. Unified Strategy for 1,5,9- and 1,5,7-Triols via Configuration-Encoded 1,5-Polyol Synthesis: Enantioselective Preparation of γ-Sulfonyl-α-silyloxyaldehydes and Iterative Julia-Kocienski Coupling. J Org Chem 2018; 83:13636-13649. [PMID: 30365891 DOI: 10.1021/acs.joc.8b02033] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Diverse classes of natural products contain chiral 1,5-polyols, within which may be stereochemical triads of 1,5,9- and 1,5,7-triols. Biological activities associated with compounds containing these motifs warrant targeted synthetic strategies to access all stereoisomers of a 1,5-polyol family from cheap and easily accessible reagents while avoiding the need to determine configurations at each alcohol stereocenter. Here, we address these problems via design and implementation of an iterative configuration-encoded strategy to access 1,5-polyols with unambiguous stereocontrol; the coupling event exploits Julia-Kocienski reactions of enantiopure α-silyloxy-γ-sulfononitriles. These building blocks, bearing sulfone at one terminus and α-silyloxyaldehyde (in latent form) at the other, were prepared via asymmetric catalysis. An efficient scalable route to these building blocks was developed, leading to enantiopure samples in multigram quantities. Preliminary studies of acetals as the latent aldehyde functionality in the α-silyloxyaldehyde showed that Julia-Kocienski coupling of these building blocks was effective, but iterative application was thwarted during acetal hydrolysis, leading to use of nitrile to perform the latent aldehyde function. A variety of 1,5-polyols, including a 1,5,9,13-tetraol and a differentially protected 1,5,9-triol, were prepared, validating the approach. The accompanying paper describes the application of this configuration-encoded 1,5-polyol synthesis to 1,5,9- and 1,5,7-triols found in tetrafibricin.
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Affiliation(s)
- Ryan M Friedrich
- Department of Chemistry , University of Iowa , Iowa City , Iowa 52242 , United States
| | | | - Jacob Hackbarth
- Department of Chemistry , University of Iowa , Iowa City , Iowa 52242 , United States
| | - Gregory K Friestad
- Department of Chemistry , University of Iowa , Iowa City , Iowa 52242 , United States
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Hetzler BE, Volpin G, Vignoni E, Petrovic AG, Proni G, Hu CT, Trauner D. A Versatile Bis-Allylboron Reagent for the Stereoselective Synthesis of Chiral Diols. Angew Chem Int Ed Engl 2018; 57:14276-14280. [PMID: 30144261 DOI: 10.1002/anie.201808234] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2018] [Indexed: 01/03/2023]
Abstract
Allylboron reagents are popular in synthesis owing to their versatility and the predictable stereochemical outcomes of their reactions with carbonyl compounds. Herein, we describe the synthesis of (Z,Z)-hexadienyl bis-boronate 1, a configurationally stable, crystalline, and easy to handle compound, which represents a class of bis-allylic boron reagents with heretofore untapped synthetic potential. In combination with a chiral phosphoric acid catalyst, the reagent can be employed for the enantioselective allyl transfer reaction to a variety of one-pot transformations, enabling swift access to functionalized 1,n-diols. The in situ conversion of the reagent into the corresponding bis-borinic ester allows for the direct and diastereoselective two-fold allyl transfer to aldehydes. This affords C2 - or Ci -symmetric stereotetrads containing a 1,4-diol moiety for natural product synthesis. The usefulness of our method was demonstrated with a short synthesis of the lignan (±)-neo-olivil.
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Affiliation(s)
- Belinda E Hetzler
- Department of Chemistry, New York University, 100 Washington Square East, New York, NY, 10003, USA
| | - Giulio Volpin
- Department of Chemistry, New York University, 100 Washington Square East, New York, NY, 10003, USA
| | - Elisa Vignoni
- Department of Drug Sciences, University of Pavia, Via Taramelli 12, 27100, Pavia, Italy
| | - Ana G Petrovic
- Department of Life Sciences, New York Institute of Technology, 1855 Broadway, New York, NY, 10023, USA
| | - Gloria Proni
- Department of Sciences, John Jay College of Criminal Justice, 524 West 54th Street, New York, NY, 10019, USA
| | - Chunhua T Hu
- Department of Chemistry, New York University, 100 Washington Square East, New York, NY, 10003, USA
| | - Dirk Trauner
- Department of Chemistry, New York University, 100 Washington Square East, New York, NY, 10003, USA
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Hetzler BE, Volpin G, Vignoni E, Petrovic AG, Proni G, Hu CT, Trauner D. Ein vielseitiges Bisallylbor‐Reagenz für die stereoselektive Synthese von chiralen Diolen. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201808234] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Belinda E. Hetzler
- Department of Chemistry New York University 100 Washington Square East New York NY 10003 USA
| | - Giulio Volpin
- Department of Chemistry New York University 100 Washington Square East New York NY 10003 USA
| | - Elisa Vignoni
- Department of Drug Sciences University of Pavia Via Taramelli 12 27100 Pavia Italien
| | - Ana G. Petrovic
- Department of Life Sciences New York Institute of Technology 1855 Broadway New York NY 10023 USA
| | - Gloria Proni
- Department of Sciences John Jay College of Criminal Justice 524 West 54th Street New York NY 10019 USA
| | - Chunhua T. Hu
- Department of Chemistry New York University 100 Washington Square East New York NY 10003 USA
| | - Dirk Trauner
- Department of Chemistry New York University 100 Washington Square East New York NY 10003 USA
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Allais C, Roush WR. Enantio- and Diastereoselective Synthesis of 1,5-syn-(Z)-Amino Alcohols via Imine Double Allylboration: Synthesis of trans-1,2,3,6-Tetrahydropyridines and Total Synthesis of Andrachcine. Org Lett 2017; 19:2646-2649. [DOI: 10.1021/acs.orglett.7b00995] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Christophe Allais
- Department of Chemistry, Scripps Florida, Jupiter, Florida 33458, United States
| | - William R. Roush
- Department of Chemistry, Scripps Florida, Jupiter, Florida 33458, United States
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Friedrich RM, Friestad GK. Access to ananti,syn-1,5,7-Triol by Configuration-Encoded 1,5-Polyol Synthesis: The C15-C25 Fragment of Tetrafibricin. European J Org Chem 2017. [DOI: 10.1002/ejoc.201700373] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Ryan M. Friedrich
- Department of Chemistry; University of Iowa; 52242 Iowa City Iowa USA
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Kister J, Ess DH, Roush WR. Enantio- and diastereoselective synthesis of syn-β-hydroxy-α-vinyl carboxylic esters via reductive aldol reactions of ethyl allenecarboxylate with 10-TMS-9-Borabicyclo[3.3.2]decane and DFT analysis of the hydroboration pathway. Org Lett 2013; 15:5436-9. [PMID: 24138187 DOI: 10.1021/ol4025277] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
An enantio- and diastereoselective synthesis of syn-β-hydroxy-α-vinyl carboxylate esters 3 via the reductive aldol reaction of ethyl allenecarboxylate (2) with 10-trimethylsilyl-9-borabicyclo[3.3.2]decane (1R) has been developed. Density functional theory calculations suggest that the allene hydroboration involves the 1,4-reduction of 2 with the 1R, leading directly to dienolborinate Z-(O)-8a.
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Affiliation(s)
- Jeremy Kister
- Department of Chemistry, Scripps Florida , Jupiter, Florida 33458, United States, and Department of Chemistry and Biochemistry, Brigham Young University , Provo, Utah 84602, United States
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Kamptmann SB, Brückner R. Stereocontrolled Synthesis of a Cn-Cn+7Building Block (“Eastern Moiety”) for the Unnatural Enantiomers of Important Polyol,Polyene Antibiotics Based on a Ring-Closing Metathesis and an Aldol Addition of a Lactone Enolate. European J Org Chem 2013. [DOI: 10.1002/ejoc.201300183] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Allais C, Nuhant P, Roush WR. (Diisopinocampheyl)borane-mediated reductive aldol reactions of acrylate esters: enantioselective synthesis of anti-aldols. Org Lett 2013; 15:3922-5. [PMID: 23885946 DOI: 10.1021/ol401679g] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The (diisopinocampheyl)borane promoted reductive aldol reaction of acrylate esters 4 is described. Isomerization of the kinetically formed Z(O)-enolborinate 5Z to the thermodynamic E(O)-enolborinate 5E via 1,3-boratropic shifts, followed by treatment with representative achiral aldehydes, leads to anti-α-methyl-β-hydroxy esters 9 or 10 with excellent diastereo- (up to ≥20:1 dr) and enantioselectivity (up to 87% ee). The results of double asymmetric reactions of 5E with several chiral aldehydes are also presented.
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Affiliation(s)
- Christophe Allais
- Department of Chemistry, Scripps Florida, Jupiter, Florida 33458, USA
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Nuhant P, Allais C, Roush WR. Diisopinocampheylborane-Mediated Reductive Aldol Reactions: Highly Enantio- and Diastereoselective Synthesis ofsynAldols fromN-Acryloylmorpholine. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201302535] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Nuhant P, Allais C, Roush WR. Diisopinocampheylborane-mediated reductive aldol reactions: highly enantio- and diastereoselective synthesis of syn aldols from N-acryloylmorpholine. Angew Chem Int Ed Engl 2013; 52:8703-7. [PMID: 23818095 DOI: 10.1002/anie.201302535] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2013] [Indexed: 11/08/2022]
Affiliation(s)
- Philippe Nuhant
- Department of Chemistry, The Scripps Research Institute, 130 Scripps Way, 3A2, Jupiter, FL 33458, USA
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Nuhant P, Roush WR. Enantio- and diastereoselective synthesis of N-acetyl dihydrotetrafibricin methyl ester. J Am Chem Soc 2013; 135:5340-3. [PMID: 23530855 PMCID: PMC3679187 DOI: 10.1021/ja401918r] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A highly diastereoselective synthesis of N-acetyl dihydrotetrafibricin methyl ester (34) is described. The synthesis features three enantioselective double allylboration reactions and an intramolecular hydrosilylation/Fleming-Tamao oxidation sequence to establish seven of the hydroxy-bearing stereocenters of 34. Especially noteworthy is the fragment-assembly double allyboration reaction of 2 and 7 using reagent 3, which provides the advanced intermediate 6 with >20:1 diastereoselectivity.
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Affiliation(s)
- Philippe Nuhant
- Department of Chemistry, Scripps Florida, Jupiter, Florida 33458
| | - William R. Roush
- Department of Chemistry, Scripps Florida, Jupiter, Florida 33458
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Han JL, Chen M, Roush WR. Diastereo- and enantioselective synthesis of (E)-2-Methyl-1,2-syn- and (E)-2-Methyl-1,2-anti-3-pentenediols via allenylboronate kinetic resolution with ((d)Ipc)2BH and aldehyde allylboration. Org Lett 2012; 14:3028-31. [PMID: 22646839 PMCID: PMC3426628 DOI: 10.1021/ol3010968] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Enantioselective hydroboration of racemic allenylboronate (±)-1 with 0.48 equiv of ((d)Ipc)(2)BH at -25 °C proceeds with efficient kinetic resolution and provides allylborane (R)-Z-4. When heated to 95 °C, allylborane (R)-Z-4 isomerizes to the thermodynamically more stable allylborane isomer (S)-E-7. Subsequent allylboration of aldehydes with (R)-Z-4 or (S)-E-7 at -78 °C followed by oxidative workup provides 1,2-syn- or 1,2-anti-diols, 2 or 3, respectively, in 87-94% ee.
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Affiliation(s)
- Jeng-Liang Han
- Department of Chemistry, Scripps Florida, Jupiter, Florida 33458
| | - Ming Chen
- Department of Chemistry, Scripps Florida, Jupiter, Florida 33458
| | - William R. Roush
- Department of Chemistry, Scripps Florida, Jupiter, Florida 33458
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(E)- and (Z)-β-Borylallylsilanes by Alkyne Silaboration Followed by Regio- and Stereoselective Double-Bond Migration. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201106077] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Ohmura T, Oshima K, Suginome M. (E)- and (Z)-β-Borylallylsilanes by Alkyne Silaboration Followed by Regio- and Stereoselective Double-Bond Migration. Angew Chem Int Ed Engl 2011; 50:12501-4. [DOI: 10.1002/anie.201106077] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2011] [Indexed: 11/06/2022]
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