1
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Ganguly A, Javed S, Bodugam M, Dissanayake GC, Chegondi R, Hanson PR. Synthesis of the C1−C16 Polyol‐Containing Macrolactone of 13‐Desmethyl Lyngbouilloside, an Unnatural Analog of the Originally Assigned Structure of (−)‐Lyngbouilloside. Isr J Chem 2021. [DOI: 10.1002/ijch.202100019] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Arghya Ganguly
- Department of Chemistry University of Kansas 1251 Wescoe Hall Drive Lawrence KS 66045-7582 USA
- Department of Chemistry University of Kansas, 1140 Gray-Little Hall 1567 Irving Hill Road Lawrence KS 66045 USA
| | - Salim Javed
- Department of Chemistry University of Kansas 1251 Wescoe Hall Drive Lawrence KS 66045-7582 USA
| | - Mahipal Bodugam
- Department of Chemistry University of Kansas 1251 Wescoe Hall Drive Lawrence KS 66045-7582 USA
| | - Gihan C. Dissanayake
- Department of Chemistry University of Kansas 1251 Wescoe Hall Drive Lawrence KS 66045-7582 USA
- Department of Chemistry University of Kansas, 1140 Gray-Little Hall 1567 Irving Hill Road Lawrence KS 66045 USA
| | - Rambabu Chegondi
- Department of Chemistry University of Kansas 1251 Wescoe Hall Drive Lawrence KS 66045-7582 USA
| | - Paul R. Hanson
- Department of Chemistry University of Kansas 1251 Wescoe Hall Drive Lawrence KS 66045-7582 USA
- Department of Chemistry University of Kansas, 1140 Gray-Little Hall 1567 Irving Hill Road Lawrence KS 66045 USA
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2
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Rohde LN, Wild TH, Diver ST. Ene-Yne Metathesis of Allylphosphonates and Allylphosphates: Synthesis of Phosphorus-Containing 1,3-Dienes. J Org Chem 2021; 86:1371-1384. [PMID: 33400866 DOI: 10.1021/acs.joc.0c02886] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A variety of ene-yne cross metathesis reactions were performed using unsaturated phosphonate and phosphate reagents, affording the corresponding phosphorylated 1,3-diene products in good to excellent yields. These difficult ene-yne metatheses employed a Grubbs catalyst bearing a cyclic amino alkyl carbene ligand. A variety of terminal alkynes of varying substitution underwent the reaction, and different phosphorus-containing alkenes were found to give the conjugated diene products in high yields. The resulting dienes were further transformed by Horner-type Wittig reactions and a Diels-Alder cycloaddition.
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Affiliation(s)
- Laurence N Rohde
- Department of Chemistry, University at Buffalo, the State University of New York, Buffalo, New York 14260, United States
| | - Thérèse H Wild
- Department of Chemistry, University at Buffalo, the State University of New York, Buffalo, New York 14260, United States
| | - Steven T Diver
- Department of Chemistry, University at Buffalo, the State University of New York, Buffalo, New York 14260, United States
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3
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Sharifzadeh S, Brown NW, Shirley JD, Bruce KE, Winkler ME, Carlson EE. Chemical tools for selective activity profiling of bacterial penicillin-binding proteins. Methods Enzymol 2020; 638:27-55. [PMID: 32416917 DOI: 10.1016/bs.mie.2020.02.015] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Penicillin-binding proteins (PBPs) are membrane-associated proteins involved in the biosynthesis of peptidoglycan (PG), the main component of bacterial cell walls. These proteins were discovered and named for their affinity to bind the β-lactam antibiotic penicillin. The importance of the PBPs has long been appreciated; however, specific roles of individual family members in each bacterial strain, as well as their protein-protein interactions, are yet to be understood. The apparent functional redundancy of the 4-18 PBPs that most eubacteria possess makes determination of their individual roles difficult. Existing techniques to study PBPs are not ideal because they do not directly visualize protein activity and can suffer from artifacts and perturbations of native PBP function. Therefore, development of new methods for studying the roles of individual PBPs in cell wall synthesis is required. We recently generated a library of fluorescent chemical probes containing a β-lactone scaffold that specifically targets the PBPs, enabling the visualization of their catalytic activity. Herein, we describe a general protocol to label and detect the activity of individual PBPs in Streptococcus pneumoniae using our fluorescent β-lactone probes.
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Affiliation(s)
- Shabnam Sharifzadeh
- Department of Chemistry, University of Minnesota, Minneapolis, MN, United States
| | - Nathaniel W Brown
- Department of Chemistry, University of Minnesota, Minneapolis, MN, United States
| | - Joshua D Shirley
- Department of Medicinal Chemistry, University of Minnesota, Minneapolis, MN, United States
| | - Kevin E Bruce
- Department of Biology, Indiana University, Bloomington, IN, United States
| | - Malcolm E Winkler
- Department of Biology, Indiana University, Bloomington, IN, United States
| | - Erin E Carlson
- Department of Chemistry, University of Minnesota, Minneapolis, MN, United States; Department of Medicinal Chemistry, University of Minnesota, Minneapolis, MN, United States; Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Minneapolis, MN, United States.
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4
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Liu X, Wang Y, Duclos RI, O’Doherty GA. Stereochemical Structure Activity Relationship Studies (S-SAR) of Tetrahydrolipstatin. ACS Med Chem Lett 2018. [PMID: 29541373 DOI: 10.1021/acsmedchemlett.8b00050] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Tetrahydrolipstatin (THL), its enantiomer, and an additional six diastereomers were evaluated as inhibitors of the hydrolysis of p-nitrophenyl butyrate by porcine pancreatic lipase. IC50s were found for all eight stereoisomers ranging from a low of 4.0 nM for THL to a high of 930 nM for the diastereomer with the inverted stereocenters at the 2,3,2'-positions. While the enantiomer of THL was also significantly less active (77 nM) the remaining five stereoisomers retained significant inhibitory activities (IC50s = 8.0 to 20 nM). All eight compounds were also evaluated against three human cancer cell lines (human breast cancers MCF-7 and MDA-MB-231, human large-cell lung carcinoma H460). No appreciable cytotoxicity was observed for THL and its seven diastereomers, as their IC50s in a MTT cytotoxicity assay were all greater than 3 orders of magnitude of camptothecin.
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Affiliation(s)
- Xiaofan Liu
- Department of Chemistry and Chemical Biology, Northeastern University, Boston, Massachusetts 02115, United States
| | - Yanping Wang
- Department of Chemistry and Chemical Biology, Northeastern University, Boston, Massachusetts 02115, United States
| | - Richard I. Duclos
- Department of Chemistry and Chemical Biology, Northeastern University, Boston, Massachusetts 02115, United States
| | - George A. O’Doherty
- Department of Chemistry and Chemical Biology, Northeastern University, Boston, Massachusetts 02115, United States
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5
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Sharifzadeh S, Boersma MJ, Kocaoglu O, Shokri A, Brown CL, Shirley JD, Winkler ME, Carlson EE. Novel Electrophilic Scaffold for Imaging of Essential Penicillin-Binding Proteins in Streptococcus pneumoniae. ACS Chem Biol 2017; 12:2849-2857. [PMID: 28990753 DOI: 10.1021/acschembio.7b00614] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Peptidoglycan (PG) is a mesh-like heteropolymer made up of glycan chains cross-linked by short peptides and is the major scaffold of eubacterial cell walls, determining cell shape, size, and chaining. This structure, which is required for growth and survival, is located outside of the cytoplasmic membrane of bacterial cells, making it highly accessible to antibiotics. Penicillin-binding proteins (PBPs) are essential for construction of PG and perform transglycosylase activities to generate the glycan strands and transpeptidation to cross-link the appended peptides. The β-lactam antibiotics, which are among the most clinically effective antibiotics for the treatment of bacterial infections, inhibit PBP transpeptidation, ultimately leading to cell lysis. Despite this importance, the discrete functions of individual PBP homologues have been difficult to determine. These major gaps in understanding of PBP activation and macromolecular interactions largely result from a lack of tools to assess the functional state of specific PBPs in bacterial cells. We have identified β-lactones as a privileged scaffold for the generation of PBP-selective probes and utilized these compounds for imaging of the essential proteins, PBP2x and PBP2b, in Streptococcus pneumoniae. We demonstrated that while PBP2b activity is restricted to a ring surrounding the division sites, PBP2x activity is present both at the septal center and at the surrounding ring. These spatially separate regions of PBP2x activity could not be detected by previous activity-based approaches, which highlights a critical strength of our PBP-selective imaging strategy.
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Affiliation(s)
- Shabnam Sharifzadeh
- Departments
of Chemistry, ‡Medicinal Chemistry, and Biochemistry, §Molecular Biology
and Biophysics, University of Minnesota, Minneapolis, Minnesota 55455, United States
- Departments of Biology, ⊥Molecular and Cellular Biochemistry,
and #Chemistry, Indiana University, Bloomington, Indiana 47405, United States
| | - Michael J. Boersma
- Departments
of Chemistry, ‡Medicinal Chemistry, and Biochemistry, §Molecular Biology
and Biophysics, University of Minnesota, Minneapolis, Minnesota 55455, United States
- Departments of Biology, ⊥Molecular and Cellular Biochemistry,
and #Chemistry, Indiana University, Bloomington, Indiana 47405, United States
| | - Ozden Kocaoglu
- Departments
of Chemistry, ‡Medicinal Chemistry, and Biochemistry, §Molecular Biology
and Biophysics, University of Minnesota, Minneapolis, Minnesota 55455, United States
- Departments of Biology, ⊥Molecular and Cellular Biochemistry,
and #Chemistry, Indiana University, Bloomington, Indiana 47405, United States
| | - Alireza Shokri
- Departments
of Chemistry, ‡Medicinal Chemistry, and Biochemistry, §Molecular Biology
and Biophysics, University of Minnesota, Minneapolis, Minnesota 55455, United States
- Departments of Biology, ⊥Molecular and Cellular Biochemistry,
and #Chemistry, Indiana University, Bloomington, Indiana 47405, United States
| | - Clayton L. Brown
- Departments
of Chemistry, ‡Medicinal Chemistry, and Biochemistry, §Molecular Biology
and Biophysics, University of Minnesota, Minneapolis, Minnesota 55455, United States
- Departments of Biology, ⊥Molecular and Cellular Biochemistry,
and #Chemistry, Indiana University, Bloomington, Indiana 47405, United States
| | - Joshua D. Shirley
- Departments
of Chemistry, ‡Medicinal Chemistry, and Biochemistry, §Molecular Biology
and Biophysics, University of Minnesota, Minneapolis, Minnesota 55455, United States
- Departments of Biology, ⊥Molecular and Cellular Biochemistry,
and #Chemistry, Indiana University, Bloomington, Indiana 47405, United States
| | - Malcolm E. Winkler
- Departments
of Chemistry, ‡Medicinal Chemistry, and Biochemistry, §Molecular Biology
and Biophysics, University of Minnesota, Minneapolis, Minnesota 55455, United States
- Departments of Biology, ⊥Molecular and Cellular Biochemistry,
and #Chemistry, Indiana University, Bloomington, Indiana 47405, United States
| | - Erin E. Carlson
- Departments
of Chemistry, ‡Medicinal Chemistry, and Biochemistry, §Molecular Biology
and Biophysics, University of Minnesota, Minneapolis, Minnesota 55455, United States
- Departments of Biology, ⊥Molecular and Cellular Biochemistry,
and #Chemistry, Indiana University, Bloomington, Indiana 47405, United States
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6
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Abstract
The synthesis of the C9-C25 subunit of the marine natural product spirastrellolide B is reported. The key synthetic features included the union of the two key fragments 5 and 6 via a Suzuki-Miyaura coupling reaction and a late-stage, one-pot sequential deprotection/cascade Achmatowicz rearrangement-spiroketalization to install the key spirocyclic intermediate present in the C9-C25 fragment of spirastrellolide B. The synthesis of the C9-C16 fragment 6 was accomplished via a phosphate tether mediated ring-closing metathesis (RCM), a subsequent hydroboration-oxidation protocol, followed by other stereoselective transformations in a facile manner. The spirocyclic intermediate was further functionalized utilizing a Lindlar/NaBH4 reduction protocol to furnish the C9-C25 subunit 3.
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Affiliation(s)
- Soma Maitra
- Department of Chemistry, University of Kansas , 1251 Wescoe Hall Drive, Lawrence, Kansas 66045-7582, United States
| | - Mahipal Bodugam
- Department of Chemistry, University of Kansas , 1251 Wescoe Hall Drive, Lawrence, Kansas 66045-7582, United States
| | - Salim Javed
- Department of Chemistry, University of Kansas , 1251 Wescoe Hall Drive, Lawrence, Kansas 66045-7582, United States
| | - Paul R Hanson
- Department of Chemistry, University of Kansas , 1251 Wescoe Hall Drive, Lawrence, Kansas 66045-7582, United States
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7
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Javed S, Bodugam M, Torres J, Ganguly A, Hanson PR. Modular Synthesis of Novel Macrocycles Bearing α,β-Unsaturated Chemotypes through a Series of One-Pot, Sequential Protocols. Chemistry 2016; 22:6755-6758. [PMID: 27059428 PMCID: PMC5094705 DOI: 10.1002/chem.201601004] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2016] [Indexed: 11/08/2022]
Abstract
A series of one-pot, sequential protocols was developed for the synthesis of novel macrocycles bearing α,β-unsaturated chemotypes. The method highlights a phosphate tether-mediated approach to establish asymmetry, and consecutive one-pot, sequential processes to access the macrocycles with minimal purification procedures. This library amenable strategy provided diverse macrocycles containing α,β-unsaturated carbon-, sulfur-, or phosphorus-based warheads.
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Affiliation(s)
- Salim Javed
- Department of Chemistry, University of Kansas, Lawrence, Kansas 66045 (USA)
| | - Mahipal Bodugam
- Department of Chemistry, University of Kansas, Lawrence, Kansas 66045 (USA)
| | - Jessica Torres
- Department of Chemistry, University of Kansas, Lawrence, Kansas 66045 (USA)
| | - Arghya Ganguly
- Department of Chemistry, University of Kansas, Lawrence, Kansas 66045 (USA)
| | - Paul R. Hanson
- Department of Chemistry, University of Kansas, Lawrence, Kansas 66045 (USA)
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8
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Perez F, Waldeck AR, Krische MJ. Total Synthesis of Cryptocaryol A by Enantioselective Iridium-Catalyzed Alcohol C-H Allylation. Angew Chem Int Ed Engl 2016; 55:5049-52. [PMID: 27079820 PMCID: PMC4834877 DOI: 10.1002/anie.201600591] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2016] [Indexed: 11/06/2022]
Abstract
The polyketide natural product cryptocaryol A is prepared in 8 steps via iridium catalyzed enantioselective diol double C-H allylation, which directly generates an acetate-based triketide stereodiad. In 4 previously reported total syntheses, 17-28 steps were required.
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Affiliation(s)
- Felix Perez
- University of Texas at Austin, Department of Chemistry, 105 E 24th St. (A5300), Austin, TX, 78712-1167, USA
| | - Andrew R Waldeck
- University of Texas at Austin, Department of Chemistry, 105 E 24th St. (A5300), Austin, TX, 78712-1167, USA
| | - Michael J Krische
- University of Texas at Austin, Department of Chemistry, 105 E 24th St. (A5300), Austin, TX, 78712-1167, USA.
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9
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Perez F, Waldeck AR, Krische MJ. Total Synthesis of Cryptocaryol A by Enantioselective Iridium-Catalyzed Alcohol C−H Allylation. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201600591] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Felix Perez
- University of Texas at Austin; Department of Chemistry; 105 E 24th St. (A5300) Austin TX 78712-1167 USA
| | - Andrew R. Waldeck
- University of Texas at Austin; Department of Chemistry; 105 E 24th St. (A5300) Austin TX 78712-1167 USA
| | - Michael J. Krische
- University of Texas at Austin; Department of Chemistry; 105 E 24th St. (A5300) Austin TX 78712-1167 USA
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10
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Schmidt B, Audörsch S. Stereoselective Total Synthesis of Atractylodemayne A, a Conjugated 2(E),8(Z),10(E)-Triene-4,6-diyne. Org Lett 2016; 18:1162-5. [DOI: 10.1021/acs.orglett.6b00274] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Bernd Schmidt
- Universitaet Potsdam, Institut fuer Chemie (Organische
Synthesechemie), Karl-Liebknecht-Strasse
24-25, D-14476 Potsdam-Golm, Germany
| | - Stephan Audörsch
- Universitaet Potsdam, Institut fuer Chemie (Organische
Synthesechemie), Karl-Liebknecht-Strasse
24-25, D-14476 Potsdam-Golm, Germany
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11
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Markley JL, Maitra S, Hanson PR. Phosphate Tether-Mediated Ring-Closing Metathesis for the Generation of P-Stereogenic, Z-Configured Bicyclo[7.3.1]- and Bicyclo[8.3.1]phosphates. J Org Chem 2016; 81:899-911. [PMID: 26794367 DOI: 10.1021/acs.joc.5b02473] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A phosphate tether-mediated ring-closing metathesis (RCM) study to the synthesis of Z-configured, P-stereogenic bicyclo[7.3.1]- and bicyclo[8.3.1]phosphates is reported. Investigations suggest that C3-substitution, olefin substitution, and proximity of the forming olefin to the bridgehead carbon of the bicyclic affect the efficiency and stereochemical outcome of the RCM event. This study demonstrates the utility of phosphate tether-mediated desymmetrization of C2-symmetric, 1,3-anti-diol-containing dienes in the generation of macrocyclic phosphates with potential synthetic and biological utility.
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Affiliation(s)
- Jana L Markley
- Department of Chemistry, University of Kansas , 1251 Wescoe Hall Drive, Lawrence, Kansas 66045-7582, United States
| | - Soma Maitra
- Department of Chemistry, University of Kansas , 1251 Wescoe Hall Drive, Lawrence, Kansas 66045-7582, United States
| | - Paul R Hanson
- Department of Chemistry, University of Kansas , 1251 Wescoe Hall Drive, Lawrence, Kansas 66045-7582, United States
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12
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Bodugam M, Javed S, Ganguly A, Torres J, Hanson PR. A Pot-Economical Approach to the Total Synthesis of Sch-725674. Org Lett 2016; 18:516-9. [PMID: 26760683 PMCID: PMC4852165 DOI: 10.1021/acs.orglett.5b03547] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A pot-economical total synthesis of antifungal Sch-725674, 1, is reported. The approach takes advantage of a number of one-pot, sequential transformations, including a phosphate tether-mediated one-pot, sequential RCM/CM/chemoselective hydrogenation protocol, a one-pot tosylation/acrylation sequence, and a one-pot, sequential Finkelstein reaction/Boord olefination/acetonide deprotection procedure to streamline the synthesis route by reducing isolation and purification procedures, thus saving time. Overall, an asymmetric route has been developed that is efficiently accomplished in seven pots from phosphate (S,S)-triene and with minimal purification.
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Affiliation(s)
| | | | - Arghya Ganguly
- Department of Chemistry, University of Kansas, 1251 Wescoe Hall Drive, Lawrence, KS 66045-7582
| | - Jessica Torres
- Department of Chemistry, University of Kansas, 1251 Wescoe Hall Drive, Lawrence, KS 66045-7582
| | - Paul R. Hanson
- Department of Chemistry, University of Kansas, 1251 Wescoe Hall Drive, Lawrence, KS 66045-7582
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13
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Phosphate Tether-Mediated Ring-Closing Metathesis for the Generation of Medium to Large, P-Stereogenic Bicyclo[n.3.1]phosphates. Tetrahedron 2015; 71:5734-5740. [PMID: 26430283 DOI: 10.1016/j.tet.2015.06.016] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
A phosphate tether-mediated ring-closing metathesis study towards the synthesis of P-stereogenic bicyclo[6.3.1]-, bicyclo[7.3.1]-, and bicyclo[8.3.1]phosphates is reported. This study demonstrates expanded utility of phosphate tether-mediated desymmetrization of C2-symmetric, 1,3-anti-diol dienes in generating complex medium to large, P-stereogenic bicyclo[n.3.1]phosphates..
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14
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Affiliation(s)
- Xiaofan Liu
- Department of Chemistry and Chemical Biology Northeastern University, 102 Hurtig Hall 360 Huntington Ave Boston MA 02115 USA
| | - Yanping Wang
- Department of Chemistry and Chemical Biology Northeastern University, 102 Hurtig Hall 360 Huntington Ave Boston MA 02115 USA
| | - George A. O'Doherty
- Department of Chemistry and Chemical Biology Northeastern University, 102 Hurtig Hall 360 Huntington Ave Boston MA 02115 USA
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15
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Mineeva IV. Asymmetric syntheses of the lactone core of tetrahydrolipstatin and tetrahydroesterastin and of the oriental hornet Vespa Orientalis pheromone. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2015. [DOI: 10.1134/s1070428015060044] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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16
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Chegondi R, Hanson PR. Synthetic Studies to Lyngbouilloside: A Phosphate Tether-Mediated Synthesis of the Macrolactone Core. Tetrahedron Lett 2015; 56:3330-3333. [PMID: 26388654 PMCID: PMC4572573 DOI: 10.1016/j.tetlet.2015.01.109] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
A concise synthetic pathway to the originally assigned structure of lyngbouilloside macrolactone (3) is reported. The core macrocycle 3 was synthesized via a phosphate tether-mediated, one-pot, sequential RCM/CM/chemoselective hydrogenation reaction, Roskamp homologation, and a high yielding Boeckman acylketene cyclization.
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Affiliation(s)
- Rambabu Chegondi
- Department of Chemistry, University of Kansas, 1251 Wescoe Hall Drive, Lawrence, KS 66045-7582
| | - Paul R. Hanson
- Department of Chemistry, University of Kansas, 1251 Wescoe Hall Drive, Lawrence, KS 66045-7582
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17
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Hanson PR, Jayasinghe S, Maitra S, Markley JL. Phosphate tethers in natural product synthesis. Top Curr Chem (Cham) 2014; 361:253-71. [PMID: 25518970 DOI: 10.1007/128_2014_572] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Abstract
Recent advances in phosphate tether-mediated natural product synthesis are reviewed. Synthetic approaches toward dolabelide C, (-)-salicylihalimide A, (-)-tetrahydrolipstatin, and (+)-strictifolione are included. In addition, current efforts in method development are briefly reviewed, including a detailed study on the effect of stereochemical complexity on the phosphate-mediated, diastereoselective ring-closing metathesis reaction and recent advances in multi-reaction, one-pot sequential processes mediated by the phosphate tether. Overall, this review seeks to highlight the utility of phosphate triesters to serve as multifunctional tethers with protecting group and latent leaving group characteristics and the ability to orchestrate multiple, orthogonal reaction pathways to allow for the facile synthesis of complex, bioactive small molecules and their analogs.
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Affiliation(s)
- Paul R Hanson
- Department of Chemistry, University of Kansas, 1251 Wescoe Hall Dr., 2010 Malott Hall, Lawrence, KS, 66045-7572, USA,
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18
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19
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Hanson PR, Jayasinghe S, Maitra S, Ndi CN, Chegondi R. A modular phosphate tether-mediated divergent strategy to complex polyols. Beilstein J Org Chem 2014; 10:2332-2337. [PMID: 25298800 PMCID: PMC4187035 DOI: 10.3762/bjoc.10.242] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2014] [Accepted: 09/05/2014] [Indexed: 12/20/2022] Open
Abstract
An efficient and divergent synthesis of polyol subunits utilizing a phosphate tether-mediated, one-pot, sequential RCM/CM/reduction process is reported. A modular, 3-component coupling strategy has been developed, in which, simple “order of addition” of a pair of olefinic-alcohol components to a pseudo-C2-symmetric phosphoryl chloride, coupled with the RCM/CM/reduction protocol, yields five polyol fragments. Each of the product polyols bears a central 1,3-anti-diol subunit with differential olefinic geometries at the periphery.
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Affiliation(s)
- Paul R Hanson
- Department of Chemistry, University of Kansas, 1251 Wescoe Hall Drive, Lawrence, KS 66045-7582, USA
| | - Susanthi Jayasinghe
- Department of Chemistry, University of Kansas, 1251 Wescoe Hall Drive, Lawrence, KS 66045-7582, USA
| | - Soma Maitra
- Department of Chemistry, University of Kansas, 1251 Wescoe Hall Drive, Lawrence, KS 66045-7582, USA
| | - Cornelius N Ndi
- Department of Chemistry, University of Kansas, 1251 Wescoe Hall Drive, Lawrence, KS 66045-7582, USA
| | - Rambabu Chegondi
- Department of Chemistry, University of Kansas, 1251 Wescoe Hall Drive, Lawrence, KS 66045-7582, USA
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20
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Mulzer M, Tiegs B, Wang Y, Coates GW, O’Doherty GA. Total synthesis of tetrahydrolipstatin and stereoisomers via a highly regio- and diastereoselective carbonylation of epoxyhomoallylic alcohols. J Am Chem Soc 2014; 136:10814-20. [PMID: 25004122 PMCID: PMC4120994 DOI: 10.1021/ja505639u] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2014] [Indexed: 02/04/2023]
Abstract
A concise enantioselective synthesis of tetrahydrolipstatin (THL) and seven stereoisomers has been achieved. The synthesis of THL was accomplished in 10 steps and 31% overall yield from an achiral ynone. Key to the success of the approach is the use of a bimetallic [Lewis acid](+)[Co(CO)4](-) catalyst for a late-stage regioselective carbonylation of an enantiomerically pure cis-epoxide to a trans-β-lactone. The success of this route to THL and its stereoisomers also demonstrated the practicality of the carbonylation catalyst for complex molecule synthesis as well as its functional group compatibility.
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Affiliation(s)
- Michael Mulzer
- Department
of Chemistry and Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853, United States
| | - Brandon
J. Tiegs
- Department
of Chemistry and Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853, United States
| | - Yanping Wang
- Department
of Chemistry and Chemical Biology, Northeastern
University, Boston, Massachusetts 02115, United States
| | - Geoffrey W. Coates
- Department
of Chemistry and Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853, United States
| | - George A. O’Doherty
- Department
of Chemistry and Chemical Biology, Northeastern
University, Boston, Massachusetts 02115, United States
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21
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Janetzko J, Batey RA. Organoboron-Based Allylation Approach to the Total Synthesis of the Medium-Ring Dilactone (+)-Antimycin A1b. J Org Chem 2014; 79:7415-24. [DOI: 10.1021/jo501134d] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- John Janetzko
- Davenport Research Laboratories,
Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, ON M5S
3H6, Canada
| | - Robert A. Batey
- Davenport Research Laboratories,
Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, ON M5S
3H6, Canada
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22
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Shiina I. An Adventurous Synthetic Journey with MNBA from Its Reaction Chemistry to the Total Synthesis of Natural Products. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2014. [DOI: 10.1246/bcsj.20130216] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Isamu Shiina
- Department of Applied Chemistry, Faculty of Science, Tokyo University of Science
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23
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Jayasinghe S, Venukadasula PKM, Hanson PR. An efficient, modular approach for the synthesis of (+)-strictifolione and a related natural product. Org Lett 2014; 16:122-5. [PMID: 24294936 PMCID: PMC4179430 DOI: 10.1021/ol403110p] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
An efficient, library amenable, "pot economical" total synthesis of (+)-strictifolione and the related natural product, (6R)-6[(E,4R,6R)-4,6-dihydroxy-10-phenyl-1-decenyl]-5,6-dihydro-2H-2-pyrone, are reported. This modular approach takes advantage of two consecutive phosphate tether-mediated, one-pot, sequential protocols, followed by a final cross metathesis to deliver both antifungal natural products in a three-pot process from the respective enantiomeric (R,R)- and (S,S)-trienes with minimal purification. A salient feature of this route is that additional protecting groups are not required as a result of the orthogonal protecting- and leaving-group properties innate to phosphate triesters.
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Affiliation(s)
- Susanthi Jayasinghe
- Department of Chemistry, University of Kansas, 1251 Wescoe Hall Drive, Lawrence, KS 66045-7582
| | | | - Paul R. Hanson
- Department of Chemistry, University of Kansas, 1251 Wescoe Hall Drive, Lawrence, KS 66045-7582
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24
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Chegondi R, Maitra S, Markley JL, Hanson PR. Phosphate-tether-mediated ring-closing metathesis for the preparation of complex 1,3-anti-diol-containing subunits. Chemistry 2013; 19:8088-93. [PMID: 23712660 DOI: 10.1002/chem.201300913] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2013] [Indexed: 11/10/2022]
Abstract
An array of examples of diastereoselective, phosphate-tether-mediated ring-closing metathesis reactions, which highlight the importance of product ring size and substrate stereochemical compatibility, as well as complexity, is reported. Studies focus primarily on the formation of bicyclo[n.3.1]phosphates, involving the coupling of C₂-symmetric dienediol subunits with a variety of simple, as well as complex, alcohol partners.
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Affiliation(s)
- Rambabu Chegondi
- Department of Chemistry, University of Kansas, Lawrence, KS 66045, USA
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25
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Herndon JW. The chemistry of the carbon–transition metal double and triple bond: Annual survey covering the year 2010. Coord Chem Rev 2012. [DOI: 10.1016/j.ccr.2012.02.015] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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26
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Venukadasula PKM, Chegondi R, Suryn GM, Hanson PR. A phosphate tether-mediated, one-pot, sequential ring-closing metathesis/cross-metathesis/chemoselective hydrogenation protocol. Org Lett 2012; 14:2634-7. [PMID: 22568560 PMCID: PMC3858481 DOI: 10.1021/ol301007h] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A versatile three-step, one-pot, sequential reaction protocol involving ring-closing metathesis, cross-metathesis, and chemoselective hydrogenation is reported. This phosphate tether-mediated process occurs without intermediate isolation, is chemoselective, and is governed by stereoelectronic properties innate to phosphate tethers, which ultimately act to preserve the integrity of the bisallylic, bicyclic phosphate for subsequent nucleophilic additions. Overall, this process can be used to efficiently generate advanced polyol synthons.
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Affiliation(s)
| | - Rambabu Chegondi
- Department of Chemistry, University of Kansas, 1251 Wescoe Hall Drive, Lawrence, KS 66045-7582
| | - Gregory M. Suryn
- Department of Chemistry, University of Kansas, 1251 Wescoe Hall Drive, Lawrence, KS 66045-7582
| | - Paul R. Hanson
- Department of Chemistry, University of Kansas, 1251 Wescoe Hall Drive, Lawrence, KS 66045-7582
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27
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Shiina I, Umezaki Y, Kuroda N, Iizumi T, Nagai S, Katoh T. MNBA-Mediated β-Lactone Formation: Mechanistic Studies and Application for the Asymmetric Total Synthesis of Tetrahydrolipstatin. J Org Chem 2012; 77:4885-901. [DOI: 10.1021/jo300139r] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Isamu Shiina
- Department of Applied Chemistry, Faculty of Science, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku,
Tokyo 162-8601, Japan
| | - Yuma Umezaki
- Department of Applied Chemistry, Faculty of Science, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku,
Tokyo 162-8601, Japan
| | - Nobutaka Kuroda
- Department of Applied Chemistry, Faculty of Science, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku,
Tokyo 162-8601, Japan
| | - Takashi Iizumi
- Department of Applied Chemistry, Faculty of Science, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku,
Tokyo 162-8601, Japan
| | - Shunsuke Nagai
- Department of Applied Chemistry, Faculty of Science, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku,
Tokyo 162-8601, Japan
| | - Takashi Katoh
- Department of Applied Chemistry, Faculty of Science, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku,
Tokyo 162-8601, Japan
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28
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Maity PK, Kainz QM, Faisal S, Rolfe A, Samarakoon TB, Basha FZ, Reiser O, Hanson PR. Intramolecular monomer-on-monomer (MoM) Mitsunobu cyclization for the synthesis of benzofused thiadiazepine-dioxides. Chem Commun (Camb) 2011; 47:12524-6. [PMID: 22027744 PMCID: PMC3271939 DOI: 10.1039/c1cc14807a] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The utilization of a monomer-on-monomer (MoM) intramolecular Mitsunobu cyclization reaction employing norbornenyl-tagged (Nb-tagged) reagents is reported for the synthesis of benzofused thiadiazepine-dioxides. Facile purification was achieved via ring-opening metathesis (ROM) polymerization initiated by one of three metathesis catalyst methods: (i) free metathesis catalyst, (ii) surface-initiated catalyst-armed silica, or (iii) surface-initiated catalyst-armed Co/C magnetic nanoparticles.
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Affiliation(s)
- Pradip K. Maity
- Department of Chemistry, University of Kansas, 1251 Wescoe Hall Drive, Lawrence, KS, 66045 and The University of Kansas Center for Chemical Methodologies and Library Development (KU-CMLD), 2034 Becker Drive, Delbert M. Shankel Structural Biology Center, Lawrence, KS 66047
| | - Quirin M. Kainz
- Department of Chemistry, University of Kansas, 1251 Wescoe Hall Drive, Lawrence, KS, 66045 and The University of Kansas Center for Chemical Methodologies and Library Development (KU-CMLD), 2034 Becker Drive, Delbert M. Shankel Structural Biology Center, Lawrence, KS 66047
- Institute for Organic Chemistry, University of Regensburg, Universitätsstr. 31, D-93053 Regensburg, Germany
| | - Saqib Faisal
- Department of Chemistry, University of Kansas, 1251 Wescoe Hall Drive, Lawrence, KS, 66045 and The University of Kansas Center for Chemical Methodologies and Library Development (KU-CMLD), 2034 Becker Drive, Delbert M. Shankel Structural Biology Center, Lawrence, KS 66047
- H. E. J. Research Institute of Chemistry, International Center for Chemical and Biological Science, University of Karachi, Karachi, Pakistan
| | - Alan Rolfe
- Department of Chemistry, University of Kansas, 1251 Wescoe Hall Drive, Lawrence, KS, 66045 and The University of Kansas Center for Chemical Methodologies and Library Development (KU-CMLD), 2034 Becker Drive, Delbert M. Shankel Structural Biology Center, Lawrence, KS 66047
| | - Thiwanka. B. Samarakoon
- Department of Chemistry, University of Kansas, 1251 Wescoe Hall Drive, Lawrence, KS, 66045 and The University of Kansas Center for Chemical Methodologies and Library Development (KU-CMLD), 2034 Becker Drive, Delbert M. Shankel Structural Biology Center, Lawrence, KS 66047
| | - Fatima Z. Basha
- H. E. J. Research Institute of Chemistry, International Center for Chemical and Biological Science, University of Karachi, Karachi, Pakistan
| | - Oliver Reiser
- Institute for Organic Chemistry, University of Regensburg, Universitätsstr. 31, D-93053 Regensburg, Germany
| | - Paul R. Hanson
- Department of Chemistry, University of Kansas, 1251 Wescoe Hall Drive, Lawrence, KS, 66045 and The University of Kansas Center for Chemical Methodologies and Library Development (KU-CMLD), 2034 Becker Drive, Delbert M. Shankel Structural Biology Center, Lawrence, KS 66047
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29
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Chegondi R, Tan MML, Hanson PR. Phosphate tether-mediated approach to the formal total synthesis of (-)-salicylihalamides A and B. J Org Chem 2011; 76:3909-16. [PMID: 21504150 PMCID: PMC3271935 DOI: 10.1021/jo200337v] [Citation(s) in RCA: 22] [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
A concise formal synthesis of the cytotoxic macrolides (-)-salicylihalamides A and B is reported. Key features of the synthetic strategy include a chemoselective hydroboration, highly regio- and diastereoselective methyl cuprate addition, Pd-catalyzed formate reduction, and an E-selective ring-closing metathesis to construct the 12-membered macrocycle subunit. Overall, two routes have been developed from a readily prepared bicyclic phosphate (4 steps), a 13-step route and a more efficient 9-step sequence relying on regioselective esterification of a key diol.
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Affiliation(s)
- Rambabu Chegondi
- Department of Chemistry, University of Kansas, 1251 Wescoe Hall Drive, Lawrence, Kansas 66045
| | - Mary M. L. Tan
- Department of Chemistry, University of Kansas, 1251 Wescoe Hall Drive, Lawrence, Kansas 66045
| | - Paul R. Hanson
- Department of Chemistry, University of Kansas, 1251 Wescoe Hall Drive, Lawrence, Kansas 66045
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30
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Hanson PR, Chegondi R, Nguyen J, Thomas CD, Waetzig JD, Whitehead A. Total synthesis of dolabelide C: a phosphate-mediated approach. J Org Chem 2011; 76:4358-70. [PMID: 21528846 DOI: 10.1021/jo2003506] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The first synthesis of dolabelide C (1), a cytotoxic marine macrolide, is reported utilizing a phosphate tether-mediated approach. Bicyclic phosphates (S,S,S(P))-5 and (R,R,R(P))-5 serve as the central building blocks for the construction of two major 1,3-anti-diol subunits in 1 through selective cleavage pathways, regioselective olefin reduction, and cross-metathesis. Overall, phosphate-mediated processes provided copious amounts of both major subunits allowing for a detailed RCM macrocyclization study to the 24-membered macrolactone 1.
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Affiliation(s)
- Paul R Hanson
- Department of Chemistry, University of Kansas, Lawrence, Kansas 66045, United States.
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31
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Cros F, Pelotier B, Piva O. Regioselective Tandem Ring Closing/Cross Metathesis of 1,5-Hexadien-3-ol Derivatives: Application to the Total Synthesis of Rugulactone. European J Org Chem 2010. [DOI: 10.1002/ejoc.201000187] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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