1
|
Stöhr F, Kulhanek N, Becker J, Göttlich R, Schindler S. Reactivity of Copper(I) Complexes Containing Ligands Derived from (1
S
,3
R
)‐Camphoric Acid with Dioxygen. Eur J Inorg Chem 2021. [DOI: 10.1002/ejic.202100187] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Fabian Stöhr
- Institute for Inorganic and Analytical Chemistry Justus-Liebig-University Gießen Heinrich-Buff-Ring 17 35392 Gießen Germany
- Institute for Organic Chemistry Justus-Liebig-University Gießen Heinrich-Buff-Ring 17 35392 Gießen Germany
| | - Niclas Kulhanek
- Institute for Organic Chemistry Justus-Liebig-University Gießen Heinrich-Buff-Ring 17 35392 Gießen Germany
| | - Jonathan Becker
- Institute for Inorganic and Analytical Chemistry Justus-Liebig-University Gießen Heinrich-Buff-Ring 17 35392 Gießen Germany
| | - Richard Göttlich
- Institute for Organic Chemistry Justus-Liebig-University Gießen Heinrich-Buff-Ring 17 35392 Gießen Germany
| | - Siegfried Schindler
- Institute for Inorganic and Analytical Chemistry Justus-Liebig-University Gießen Heinrich-Buff-Ring 17 35392 Gießen Germany
| |
Collapse
|
2
|
Paraja M, Hao X, Matile S. Polyether Natural Product Inspired Cascade Cyclizations: Autocatalysis on π-Acidic Aromatic Surfaces. Angew Chem Int Ed Engl 2020; 59:15093-15097. [PMID: 32181559 DOI: 10.1002/anie.202000681] [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] [Received: 01/14/2020] [Indexed: 01/03/2023]
Abstract
Anion-π catalysis functions by stabilizing anionic transition states on aromatic π surfaces, thus providing a new approach to molecular transformation. The delocalized nature of anion-π interactions suggests that they serve best in stabilizing long-distance charge displacements. Aiming therefore for an anionic cascade reaction that is as charismatic as the steroid cyclization is for conventional cation-π biocatalysis, reported here is the anion-π-catalyzed epoxide-opening ether cyclizations of oligomers. Only on π-acidic aromatic surfaces having a positive quadrupole moment, such as hexafluorobenzene to naphthalenediimides, do these polyether cascade cyclizations proceed with exceptionally high autocatalysis (rate enhancements kauto /kcat >104 m-1 ). This distinctive characteristic adds complexity to reaction mechanisms (Goldilocks-type substrate concentration dependence, entropy-centered substrate destabilization) and opens intriguing perspectives for future developments.
Collapse
Affiliation(s)
- Miguel Paraja
- Department of Organic Chemistry, University of Geneva, Geneva, Switzerland
| | - Xiaoyu Hao
- Department of Organic Chemistry, University of Geneva, Geneva, Switzerland
| | - Stefan Matile
- Department of Organic Chemistry, University of Geneva, Geneva, Switzerland
| |
Collapse
|
3
|
Paraja M, Hao X, Matile S. Polyether Natural Product Inspired Cascade Cyclizations: Autocatalysis on π‐Acidic Aromatic Surfaces. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202000681] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Miguel Paraja
- Department of Organic Chemistry University of Geneva Geneva Switzerland
| | - Xiaoyu Hao
- Department of Organic Chemistry University of Geneva Geneva Switzerland
| | - Stefan Matile
- Department of Organic Chemistry University of Geneva Geneva Switzerland
| |
Collapse
|
4
|
Chen R, Shen Y, Yang S, Zhang Y. Conformational Design Principles in Total Synthesis. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202003735] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Renzhi Chen
- Department of Chemistry and Key Laboratory of Chemical Biology of Fujian Province, iChEM College of Chemistry and Chemical Engineering Xiamen University Xiamen Fujian 361005 China
| | - Yang Shen
- Department of Chemistry and Key Laboratory of Chemical Biology of Fujian Province, iChEM College of Chemistry and Chemical Engineering Xiamen University Xiamen Fujian 361005 China
| | - Sihan Yang
- Department of Chemistry and Key Laboratory of Chemical Biology of Fujian Province, iChEM College of Chemistry and Chemical Engineering Xiamen University Xiamen Fujian 361005 China
| | - Yandong Zhang
- Department of Chemistry and Key Laboratory of Chemical Biology of Fujian Province, iChEM College of Chemistry and Chemical Engineering Xiamen University Xiamen Fujian 361005 China
| |
Collapse
|
5
|
Bandaru A, Kaliappan KP. Synthesis of the C
1
‐C
10
Fragment of Muamvatin. Chem Asian J 2020; 15:2208-2211. [DOI: 10.1002/asia.202000459] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Revised: 05/20/2020] [Indexed: 11/05/2022]
Affiliation(s)
- Anandaraju Bandaru
- Department of ChemistryIndian Institute of Technology Bombay Powai Mumbai 400076 India
- Department of ChemistryIndian Institute of Technology Bombay Powai Mumbai 400076 India
| | - Krishna P. Kaliappan
- Department of ChemistryIndian Institute of Technology Bombay Powai Mumbai 400076 India
- Department of ChemistryIndian Institute of Technology Bombay Powai Mumbai 400076 India
| |
Collapse
|
6
|
Chen R, Shen Y, Yang S, Zhang Y. Conformational Design Principles in Total Synthesis. Angew Chem Int Ed Engl 2020; 59:14198-14210. [DOI: 10.1002/anie.202003735] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Indexed: 12/17/2022]
Affiliation(s)
- Renzhi Chen
- Department of Chemistry and Key Laboratory of Chemical Biology of Fujian Province, iChEM College of Chemistry and Chemical Engineering Xiamen University Xiamen Fujian 361005 China
| | - Yang Shen
- Department of Chemistry and Key Laboratory of Chemical Biology of Fujian Province, iChEM College of Chemistry and Chemical Engineering Xiamen University Xiamen Fujian 361005 China
| | - Sihan Yang
- Department of Chemistry and Key Laboratory of Chemical Biology of Fujian Province, iChEM College of Chemistry and Chemical Engineering Xiamen University Xiamen Fujian 361005 China
| | - Yandong Zhang
- Department of Chemistry and Key Laboratory of Chemical Biology of Fujian Province, iChEM College of Chemistry and Chemical Engineering Xiamen University Xiamen Fujian 361005 China
| |
Collapse
|
7
|
Paraja M, Matile S. Primary Anion–π Catalysis of Epoxide‐Opening Ether Cyclization into Rings of Different Sizes: Access to New Reactivity. Angew Chem Int Ed Engl 2020; 59:6273-6277. [DOI: 10.1002/anie.202000579] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2020] [Indexed: 11/07/2022]
Affiliation(s)
- Miguel Paraja
- Department of Organic ChemistryUniversity of Geneva Geneva Switzerland
| | - Stefan Matile
- Department of Organic ChemistryUniversity of Geneva Geneva Switzerland
| |
Collapse
|
8
|
Primary Anion–π Catalysis of Epoxide‐Opening Ether Cyclization into Rings of Different Sizes: Access to New Reactivity. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202000579] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
|
9
|
Bentler P, Bergander K, Daniliuc CG, Mück‐Lichtenfeld C, Jumde RP, Hirsch AKH, Gilmour R. Inverting Small Molecule-Protein Recognition by the Fluorine Gauche Effect: Selectivity Regulated by Multiple H→F Bioisosterism. Angew Chem Int Ed Engl 2019; 58:10990-10994. [PMID: 31157945 PMCID: PMC6771710 DOI: 10.1002/anie.201905452] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2019] [Revised: 05/31/2019] [Indexed: 12/31/2022]
Abstract
Fluorinated motifs have a venerable history in drug discovery, but as C(sp3 )-F-rich 3D scaffolds appear with increasing frequency, the effect of multiple bioisosteric changes on molecular recognition requires elucidation. Herein we demonstrate that installation of a 1,3,5-stereotriad, in the substrate for a commonly used lipase from Pseudomonas fluorescens does not inhibit recognition, but inverts stereoselectivity. This provides facile access to optically active, stereochemically well-defined organofluorine compounds (up to 98 % ee). Whilst orthogonal recognition is observed with fluorine, the trend does not hold for the corresponding chlorinated substrates or mixed halogens. This phenomenon can be placed on a structural basis by considering the stereoelectronic gauche effect inherent to F-C-C-X systems (σ→σ*). Docking reveals that this change in selectivity (H versus F) with a common lipase results from inversion in the orientation of the bound substrate being processed as a consequence of conformation. This contrasts with the stereochemical interpretation of the biogenetic isoprene rule, whereby product divergence from a common starting material is also a consequence of conformation, albeit enforced by two discrete enzymes.
Collapse
Affiliation(s)
- Patrick Bentler
- Organisch Chemisches InstitutWestfälische Wilhelms-Universität MünsterCorrensstraße 4048149MünsterGermany
| | - Klaus Bergander
- Organisch Chemisches InstitutWestfälische Wilhelms-Universität MünsterCorrensstraße 4048149MünsterGermany
| | - Constantin G. Daniliuc
- Organisch Chemisches InstitutWestfälische Wilhelms-Universität MünsterCorrensstraße 4048149MünsterGermany
| | - Christian Mück‐Lichtenfeld
- Organisch Chemisches InstitutWestfälische Wilhelms-Universität MünsterCorrensstraße 4048149MünsterGermany
| | - Ravindra P. Jumde
- Helmholtz Institute for Pharmaceutical Research Saarland (HIPS)Helmholtz Centre for Infection Research (HZI)Department of Drug Design and OptimizationUniversity Campus E8.166123SaarbrückenGermany
| | - Anna K. H. Hirsch
- Helmholtz Institute for Pharmaceutical Research Saarland (HIPS)Helmholtz Centre for Infection Research (HZI)Department of Drug Design and OptimizationUniversity Campus E8.166123SaarbrückenGermany
- Department of PharmacySaarland University66123SaarbrückenGermany
| | - Ryan Gilmour
- Organisch Chemisches InstitutWestfälische Wilhelms-Universität MünsterCorrensstraße 4048149MünsterGermany
| |
Collapse
|
10
|
Bentler P, Bergander K, Daniliuc CG, Mück‐Lichtenfeld C, Jumde RP, Hirsch AKH, Gilmour R. Inverting Small Molecule–Protein Recognition by the Fluorine
Gauche
Effect: Selectivity Regulated by Multiple H→F Bioisosterism. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201905452] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Patrick Bentler
- Organisch Chemisches InstitutWestfälische Wilhelms-Universität Münster Corrensstraße 40 48149 Münster Germany
| | - Klaus Bergander
- Organisch Chemisches InstitutWestfälische Wilhelms-Universität Münster Corrensstraße 40 48149 Münster Germany
| | - Constantin G. Daniliuc
- Organisch Chemisches InstitutWestfälische Wilhelms-Universität Münster Corrensstraße 40 48149 Münster Germany
| | - Christian Mück‐Lichtenfeld
- Organisch Chemisches InstitutWestfälische Wilhelms-Universität Münster Corrensstraße 40 48149 Münster Germany
| | - Ravindra P. Jumde
- Helmholtz Institute for Pharmaceutical Research Saarland (HIPS)Helmholtz Centre for Infection Research (HZI)Department of Drug Design and Optimization University Campus E8.1 66123 Saarbrücken Germany
| | - Anna K. H. Hirsch
- Helmholtz Institute for Pharmaceutical Research Saarland (HIPS)Helmholtz Centre for Infection Research (HZI)Department of Drug Design and Optimization University Campus E8.1 66123 Saarbrücken Germany
- Department of PharmacySaarland University 66123 Saarbrücken Germany
| | - Ryan Gilmour
- Organisch Chemisches InstitutWestfälische Wilhelms-Universität Münster Corrensstraße 40 48149 Münster Germany
| |
Collapse
|
11
|
Kumar CVS, Holyoke CW, Fleming FF. Diastereoselective Electrophile-Directed Alkylations. European J Org Chem 2019. [DOI: 10.1002/ejoc.201900174] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
| | - Caleb W. Holyoke
- Department of Chemistry; Drexel University; 32 South 32nd St. Philadelphia PA 19104 USA
| | - Fraser F. Fleming
- Department of Chemistry; Drexel University; 32 South 32nd St. Philadelphia PA 19104 USA
| |
Collapse
|
12
|
Murayama T, Nozaki K. Single-Step Construction of the anti-Deoxypropionate Motif from Propylene: Formal Total Synthesis of the Cuticular Hydrocarbons Isolated from Antitrogus parvulus. Angew Chem Int Ed Engl 2018; 57:11394-11398. [PMID: 29953709 DOI: 10.1002/anie.201804711] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2018] [Revised: 06/06/2018] [Indexed: 11/06/2022]
Abstract
Reported herein is the single-step construction of an anti-configured deoxypropionate motif by syndiospecific propylene oligomerization catalyzed by a Cs -symmetric zirconocene complex. After oligomerization, oxidation of the oligomers by oxygen afforded oligopropylene alcohols in a single step. This strategy was applied to the single-step preparation of rel-(2R,4S,6R,8S)-2,4,6,8-tetramethylundecan-1-ol, the racemic mixture of the synthetic fragment of the cuticular hydrocarbons isolated from the cane beetle Antitrogus parvulus.
Collapse
Affiliation(s)
- Toshiki Murayama
- Department of Chemistry and Biotechnology, Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan
| | - Kyoko Nozaki
- Department of Chemistry and Biotechnology, Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan
| |
Collapse
|
13
|
Murayama T, Nozaki K. Single-Step Construction of the anti
-Deoxypropionate Motif from Propylene: Formal Total Synthesis of the Cuticular Hydrocarbons Isolated from Antitrogus parvulus. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201804711] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Toshiki Murayama
- Department of Chemistry and Biotechnology; Graduate School of Engineering; The University of Tokyo; 7-3-1 Hongo Bunkyo-ku Tokyo 113-8656 Japan
| | - Kyoko Nozaki
- Department of Chemistry and Biotechnology; Graduate School of Engineering; The University of Tokyo; 7-3-1 Hongo Bunkyo-ku Tokyo 113-8656 Japan
| |
Collapse
|
14
|
Lockhart Z, Knipe PC. Conformationally Programmable Chiral Foldamers with Compact and Extended Domains Controlled by Monomer Structure. Angew Chem Int Ed Engl 2018; 57:8478-8482. [PMID: 29737622 PMCID: PMC6055681 DOI: 10.1002/anie.201802822] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2018] [Revised: 04/24/2018] [Indexed: 11/17/2022]
Abstract
Foldamers are an important class of abiotic macromolecules, with potential therapeutic applications in the disruption of protein–protein interactions. The majority adopt a single conformational motif such as a helix. A class of foldamer is now introduced where the choice of heterocycle within each monomer, coupled with a strong conformation‐determining dipole repulsion effect, allows both helical and extended conformations to be selected. Combining these monomers into hetero‐oligomers enables highly controlled exploration of conformational space and projection of side‐chains along multiple vectors. The foldamers were rapidly constructed via an iterative deprotection‐cross‐coupling sequence, and their solid‐ and solution‐phase conformations were analysed by X‐ray crystallography and NMR and CD spectroscopy. These molecules may find applications in protein surface recognition where the interface does not involve canonical peptide secondary structures.
Collapse
Affiliation(s)
- Zachariah Lockhart
- School of Chemistry and Chemical Engineering, Queen's University Belfast, David Keir Building, Belfast, BT9 5AG, UK
| | - Peter C Knipe
- School of Chemistry and Chemical Engineering, Queen's University Belfast, David Keir Building, Belfast, BT9 5AG, UK
| |
Collapse
|
15
|
Lockhart Z, Knipe PC. Conformationally Programmable Chiral Foldamers with Compact and Extended Domains Controlled by Monomer Structure. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201802822] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Zachariah Lockhart
- School of Chemistry and Chemical Engineering Queen's University Belfast David Keir Building Belfast BT9 5AG UK
| | - Peter C. Knipe
- School of Chemistry and Chemical Engineering Queen's University Belfast David Keir Building Belfast BT9 5AG UK
| |
Collapse
|
16
|
Spreider PA, Breit B. Palladium-Catalyzed Stereoselective Cyclization of in Situ Formed Allenyl Hemiacetals: Synthesis of Rosuvastatin and Pitavastatin. Org Lett 2018; 20:3286-3290. [DOI: 10.1021/acs.orglett.8b01156] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Pierre A. Spreider
- Institut für Organische Chemie, Albert-Ludwigs-Universität Freiburg, Albertstrasse 21, 79104 Freiburg im Breisgau, Germany
| | - Bernhard Breit
- Institut für Organische Chemie, Albert-Ludwigs-Universität Freiburg, Albertstrasse 21, 79104 Freiburg im Breisgau, Germany
| |
Collapse
|
17
|
Chepyshev SV, Pitta BR, Vangala SR, Lujan-Montelongo JA, Steward OW, Fleming FF. Electrophile-Directed Diastereoselective Oxonitrile Alkylations. Chemistry 2018; 24:2850-2853. [PMID: 29327787 DOI: 10.1002/chem.201705791] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2017] [Indexed: 11/10/2022]
Abstract
Diastereoselective alkylation of prochiral oxonitrile dianions with secondary alkyl halides efficiently installs two contiguous stereogenic centers. The confluence of nucleophilic trajectory and the electrophile chirality causes distinct steric differences that allow efficient discrimination for one of the six possible conformers. Numerous oxonitrile-derived dianions efficiently displace secondary alkyl halides propagating the electrophile chirality to efficiently install two contiguous tertiary centers. The prevalence of chiral, secondary electrophiles makes the interdigitated alkylation of chiral electrophiles a particularly attractive route because the resulting oxonitriles are readily transformed into bioactive heterocycles.
Collapse
Affiliation(s)
- Sergiy V Chepyshev
- Department of Chemistry, Drexel University, Philadelphia, PA, 19104, USA
| | | | | | - J Armando Lujan-Montelongo
- Departamento de Química, Centro de Investigación y de Estudios Avanzados (Cinvestav), Av. Instituto Politécnico Nacional 2508, Ciudad de México, 07360, México
| | | | - Fraser F Fleming
- Department of Chemistry, Drexel University, Philadelphia, PA, 19104, USA
| |
Collapse
|
18
|
Stumpf TDJ, Steinbach M, Würtele C, Becker J, Becker S, Fröhlich R, Göttlich R, Schindler S. Reactivity of Copper Complexes with Bis(piperidinyl)methane and Bis(quinolinyl)methane Ligands. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201700755] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Tim-Daniel J. Stumpf
- Institute for Inorganic and Analytical Chemistry; Justus-Liebig-University Gießen; Heinrich-Buff-Ring 17 35392 Gießen Germany
- Institute for Organic Chemistry; Justus-Liebig-University Gießen; Heinrich-Buff-Ring 17 35392 Gießen Germany
| | - Manfred Steinbach
- Institute for Inorganic and Analytical Chemistry; Justus-Liebig-University Gießen; Heinrich-Buff-Ring 17 35392 Gießen Germany
- Institute for Organic Chemistry; Justus-Liebig-University Gießen; Heinrich-Buff-Ring 17 35392 Gießen Germany
| | - Christian Würtele
- Institute for Inorganic and Analytical Chemistry; Justus-Liebig-University Gießen; Heinrich-Buff-Ring 17 35392 Gießen Germany
| | - Jonathan Becker
- Institute for Inorganic and Analytical Chemistry; Justus-Liebig-University Gießen; Heinrich-Buff-Ring 17 35392 Gießen Germany
| | - Sabine Becker
- Institute for Inorganic and Analytical Chemistry; Justus-Liebig-University Gießen; Heinrich-Buff-Ring 17 35392 Gießen Germany
| | - Roland Fröhlich
- Institute for Organic Chemistry; WWU Münster; Corrensstraße 40 48149 Münster Germany
| | - Richard Göttlich
- Institute for Organic Chemistry; Justus-Liebig-University Gießen; Heinrich-Buff-Ring 17 35392 Gießen Germany
| | - Siegfried Schindler
- Institute for Inorganic and Analytical Chemistry; Justus-Liebig-University Gießen; Heinrich-Buff-Ring 17 35392 Gießen Germany
| |
Collapse
|
19
|
Polyunsaturated C-Glycosidic 4-Hydroxy-2-pyrone Derivatives: Total Synthesis Shows that Putative Orevactaene Is Likely Identical with Epipyrone A. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201702189] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
20
|
Preindl J, Schulthoff S, Wirtz C, Lingnau J, Fürstner A. Polyunsaturated C-Glycosidic 4-Hydroxy-2-pyrone Derivatives: Total Synthesis Shows that Putative Orevactaene Is Likely Identical with Epipyrone A. Angew Chem Int Ed Engl 2017; 56:7525-7530. [DOI: 10.1002/anie.201702189] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2017] [Revised: 04/03/2017] [Indexed: 01/08/2023]
Affiliation(s)
- Johannes Preindl
- Max-Planck-Institut für Kohlenforschung; 45470 Mülheim/Ruhr Germany
| | | | - Conny Wirtz
- Max-Planck-Institut für Kohlenforschung; 45470 Mülheim/Ruhr Germany
| | - Julia Lingnau
- Max-Planck-Institut für Kohlenforschung; 45470 Mülheim/Ruhr Germany
| | - Alois Fürstner
- Max-Planck-Institut für Kohlenforschung; 45470 Mülheim/Ruhr Germany
| |
Collapse
|
21
|
Scheidt F, Selter P, Santschi N, Holland MC, Dudenko DV, Daniliuc C, Mück-Lichtenfeld C, Hansen MR, Gilmour R. Emulating Natural Product Conformation by Cooperative, Non-Covalent Fluorine Interactions. Chemistry 2016; 23:6142-6149. [PMID: 27788283 DOI: 10.1002/chem.201604632] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2016] [Indexed: 01/22/2023]
Abstract
Pervasive in Nature, the propane unit is an essential component of numerous bioactive molecules. These range from acyclic systems, such as the neurotransmitter γ-aminobutyric acid, through to the bicyclic nuclei of various chromanes and dihydrobenzofurans. In the latter case, cyclisation via cyclic ether formation ensures a highly pre-organised structure, whilst linear scaffolds display more dynamic conformational behaviour resulting from rotation about the two internal C(sp3 )-C(sp3 ) bonds. In this study, the replacement of -[CH2 ]- units by -[CHF]- centres is evaluated as a strategy to achieve acyclic conformational control by hindering these internal rotations. Reinforcing, non-covalent fluorine interactions are validated as powerful design features that result in programmable conformational behaviours: These are encoded by the relative configuration of each centre. By exploiting cooperative neighbouring stereoelectronic effects in a multi-vicinal fluoroalkane it is possible to emulate the overall conformation of the dihydrobenzofuran scaffold found in a variety of natural products with an acyclic mimic. This is described as a function of two bond vectors at the chain termini and validated by combined theoretical, crystallographic and spectroscopic analyses. In view of the favourable physicochemical properties associated with fluorine introduction, this approach to bioactive scaffold design may prove to be expansive.
Collapse
Affiliation(s)
- Felix Scheidt
- Organic Chemistry Institute, Westfälische Wilhelms-Universität Münster, Corrensstraße 40, 48149, Germany
| | - Philipp Selter
- Institute for Physical Chemistry, Westfälische Wilhelms-Universität Münster, Corrensstraße 40, 48149, Germany
| | - Nico Santschi
- Organic Chemistry Institute, Westfälische Wilhelms-Universität Münster, Corrensstraße 40, 48149, Germany
| | - Mareike C Holland
- Organic Chemistry Institute, Westfälische Wilhelms-Universität Münster, Corrensstraße 40, 48149, Germany
| | - Dmytro V Dudenko
- Laboratory for Chemistry of Novel Materials, University of Mons, Place du Parc 20, 7000, Mons, Belgium
| | - Constantin Daniliuc
- Organic Chemistry Institute, Westfälische Wilhelms-Universität Münster, Corrensstraße 40, 48149, Germany
| | - Christian Mück-Lichtenfeld
- Organic Chemistry Institute, Westfälische Wilhelms-Universität Münster, Corrensstraße 40, 48149, Germany
| | - Michael Ryan Hansen
- Institute for Physical Chemistry, Westfälische Wilhelms-Universität Münster, Corrensstraße 40, 48149, Germany
| | - Ryan Gilmour
- Organic Chemistry Institute, Westfälische Wilhelms-Universität Münster, Corrensstraße 40, 48149, Germany.,Excellence Cluster EXC 1003, Cells in Motion, Westfälische Wilhelms-Universität Münster, Münster, Germany
| |
Collapse
|
22
|
Schwenk S, Ronco C, Oberheide A, Arndt HD. Biomimetic Synthesis of Urukthapelstatin A by Aza-Wittig Ring Contraction. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600994] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Sebastian Schwenk
- Friedrich-Schiller-Universität; Institut für Organische Chemie und Makromolekulare Chemie; Humboldtstr. 10 07743 Jena Germany
| | - Cyril Ronco
- Friedrich-Schiller-Universität; Institut für Organische Chemie und Makromolekulare Chemie; Humboldtstr. 10 07743 Jena Germany
| | - Ansgar Oberheide
- Friedrich-Schiller-Universität; Institut für Organische Chemie und Makromolekulare Chemie; Humboldtstr. 10 07743 Jena Germany
| | - Hans-Dieter Arndt
- Friedrich-Schiller-Universität; Institut für Organische Chemie und Makromolekulare Chemie; Humboldtstr. 10 07743 Jena Germany
| |
Collapse
|
23
|
Holt D, Gaunt MJ. Copper-Catalyzed Oxy-Alkenylation of Homoallylic Alcohols to Generate Functionalsyn-1,3-Diol Derivatives. Angew Chem Int Ed Engl 2015; 54:7857-61. [DOI: 10.1002/anie.201501995] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2015] [Indexed: 11/07/2022]
|
24
|
Holt D, Gaunt MJ. Copper-Catalyzed Oxy-Alkenylation of Homoallylic Alcohols to Generate Functionalsyn-1,3-Diol Derivatives. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201501995] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
25
|
Katayev D, Jia YX, Sharma AK, Banerjee D, Besnard C, Sunoj RB, Kündig EP. Synthesis of 3,3-Disubstituted Oxindoles by Palladium-Catalyzed Asymmetric Intramolecular α-Arylation of Amides: Reaction Development and Mechanistic Studies. Chemistry 2013; 19:11916-27. [DOI: 10.1002/chem.201301572] [Citation(s) in RCA: 78] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2013] [Indexed: 11/10/2022]
|
26
|
Okura K, Inoue M. The Orientation of the TerminaltBu Group of Antillatoxin is Important for Potent Toxicity: Design, Synthesis and Biological Evaluation of Conformationally Restricted Analogues of Antillatoxin. ASIAN J ORG CHEM 2013. [DOI: 10.1002/ajoc.201300111] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
27
|
Walleser P, Brückner R. Enantioselective Synthesis of (+)-Obolactone Based on a Symmetry-Breaking Wacker Monooxidation of a Diene. Org Lett 2013; 15:1294-7. [DOI: 10.1021/ol400232m] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Patrick Walleser
- Institut für Organische Chemie, Albert-Ludwigs-Universität, Albertstraße 21, 79104 Freiburg im Breisgau, Germany
| | - Reinhard Brückner
- Institut für Organische Chemie, Albert-Ludwigs-Universität, Albertstraße 21, 79104 Freiburg im Breisgau, Germany
| |
Collapse
|
28
|
Nilewski C, Carreira EM. Recent Advances in the Total Synthesis of Chlorosulfolipids. European J Org Chem 2012. [DOI: 10.1002/ejoc.201101525] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
29
|
Zimmer LE, Sparr C, Gilmour R. Konformative Fluoreffekte in der Organokatalyse: eine neuartige Strategie zum molekularen Design. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201102027] [Citation(s) in RCA: 116] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
|
30
|
Zimmer LE, Sparr C, Gilmour R. Fluorine conformational effects in organocatalysis: an emerging strategy for molecular design. Angew Chem Int Ed Engl 2011; 50:11860-71. [PMID: 21953782 DOI: 10.1002/anie.201102027] [Citation(s) in RCA: 239] [Impact Index Per Article: 18.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2011] [Indexed: 11/12/2022]
Abstract
Molecular design strategies that profit from the intrinsic stereoelectronic and electrostatic effects of fluorinated organic molecules have mainly been restricted to bio-organic chemistry. Indeed, many fluorine conformational effects remain academic curiosities with no immediate application. However, the renaissance of organocatalysis offers the possibility to exploit many of these well-described phenomena for molecular preorganization. In this minireview, we highlight examples of catalyst refinement by introduction of an aliphatic C-F bond which functions as a chemically inert steering group for conformational control.
Collapse
Affiliation(s)
- Lucie E Zimmer
- ETH Zürich, Laboratorium für Organische Chemie, Departement Chemie und Angewandte Biowissenschaften, Wolfgang-Pauli-Str. 10, CH-8093 Zürich, Switzerland
| | | | | |
Collapse
|
31
|
Theurer M, El Baz Y, Koschorreck K, Urlacher VB, Rauhut G, Baro A, Laschat S. Chemoenzymatic Synthesis of the C3-C11-Fragment of Borrelidin. European J Org Chem 2011. [DOI: 10.1002/ejoc.201100412] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
32
|
Paterson I, Dalby SM, Roberts JC, Naylor GJ, Guzmán EA, Isbrucker R, Pitts TP, Linley P, Divlianska D, Reed JK, Wright AE. Leiodermatolide, a potent antimitotic macrolide from the marine sponge Leiodermatium sp. Angew Chem Int Ed Engl 2011; 50:3219-23. [PMID: 21374771 PMCID: PMC3875319 DOI: 10.1002/anie.201007719] [Citation(s) in RCA: 79] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2010] [Revised: 01/18/2011] [Indexed: 11/11/2022]
Abstract
Leiodermatolide is a structurally unique macrolide, isolated from the deep-water marine sponge Leiodermatium sp ., which exhibits potent antiproliferative activity against a range of human cancer cell lines (IC50 <10 nM) and dramatic effects on spindle formation in mitotic cells. Its unprecedented polyketide skeleton and stereochemistry were established using a combination of experimental and computational (DP4) NMR methods, and molecular modelling.
Collapse
Affiliation(s)
- Ian Paterson
- University Chemical Laboratory, Lensfield Road, Cambridge, CB2 1EW, UK, Fax: (+44)1223-336362, Homepage: http://www-paterson.ch.cam.ac.uk/
| | - Stephen M. Dalby
- University Chemical Laboratory, Lensfield Road, Cambridge, CB2 1EW, UK, Fax: (+44)1223-336362, Homepage: http://www-paterson.ch.cam.ac.uk/
| | - Jill C. Roberts
- Harbor Branch Oceanographic Institute at Florida Atlantic University, 5600 US 1 North, Fort Pierce, Florida, USA FL 34946, Fax: (+00)1-772-242-2332
| | - Guy J. Naylor
- University Chemical Laboratory, Lensfield Road, Cambridge, CB2 1EW, UK, Fax: (+44)1223-336362, Homepage: http://www-paterson.ch.cam.ac.uk/
| | - Esther A. Guzmán
- Harbor Branch Oceanographic Institute at Florida Atlantic University, 5600 US 1 North, Fort Pierce, Florida, USA FL 34946, Fax: (+00)1-772-242-2332
| | - Richard Isbrucker
- Harbor Branch Oceanographic Institute at Florida Atlantic University, 5600 US 1 North, Fort Pierce, Florida, USA FL 34946, Fax: (+00)1-772-242-2332
| | - Tara P. Pitts
- Harbor Branch Oceanographic Institute at Florida Atlantic University, 5600 US 1 North, Fort Pierce, Florida, USA FL 34946, Fax: (+00)1-772-242-2332
| | - Pat Linley
- Harbor Branch Oceanographic Institute at Florida Atlantic University, 5600 US 1 North, Fort Pierce, Florida, USA FL 34946, Fax: (+00)1-772-242-2332
| | - Daniela Divlianska
- Harbor Branch Oceanographic Institute at Florida Atlantic University, 5600 US 1 North, Fort Pierce, Florida, USA FL 34946, Fax: (+00)1-772-242-2332
| | - John K. Reed
- Harbor Branch Oceanographic Institute at Florida Atlantic University, 5600 US 1 North, Fort Pierce, Florida, USA FL 34946, Fax: (+00)1-772-242-2332
| | - Amy E. Wright
- Harbor Branch Oceanographic Institute at Florida Atlantic University, 5600 US 1 North, Fort Pierce, Florida, USA FL 34946, Fax: (+00)1-772-242-2332
| |
Collapse
|
33
|
Paterson I, Dalby SM, Roberts JC, Naylor GJ, Guzmán EA, Isbrucker R, Pitts TP, Linley P, Divlianska D, Reed JK, Wright AE. Leiodermatolide, a Potent Antimitotic Macrolide from the Marine Sponge Leiodermatium sp. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201007719] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
34
|
Paterson I, Naylor GJ, Gardner NM, Guzmán E, Wright AE. Total synthesis and biological evaluation of a series of macrocyclic hybrids and analogues of the antimitotic natural products dictyostatin, discodermolide, and taxol. Chem Asian J 2011; 6:459-73. [PMID: 21254424 PMCID: PMC3050503 DOI: 10.1002/asia.201000541] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2010] [Indexed: 11/09/2022]
Abstract
The design, synthesis, and biological evaluation of a series of hybrids and analogues of the microtubule-stabilizing anticancer agents dictyostatin, discodermolide, and taxol is described. A 22-membered macrolide scaffold was prepared by adapting earlier synthetic routes directed towards dictyostatin and discodermolide, taking advantage of the distinctive structural and stereochemical similarities between these two polyketide-derived marine natural products. Initial endeavors towards accessing novel discodermolide/dictyostatin hybrids led to the adoption of a late-stage diversification strategy and the construction of a small library of methyl-ether derivatives, along with the first triple hybrids bearing the side-chain of taxol or taxotere attached through an ester linkage. Biological assays of the anti-proliferative activity of these compounds in a series of human cancer cell lines, including the taxol-resistant NCI/ADR-Res cell line, allowed the proposal of various structure-activity relationships. This led to the identification of a potent macrocyclic discodermolide/dictyostatin hybrid 12 and its C9 methoxy derivative 38, accessible by an efficient total synthesis and with a similar biological profile to dictyostatin.
Collapse
Affiliation(s)
- Ian Paterson
- University Chemical Laboratory, Lensfield Road, Cambridge, CB2 1EW UK.
| | | | | | | | | |
Collapse
|
35
|
Stang EM, White MC. On the macrocyclization of the erythromycin core: preorganization is not required. Angew Chem Int Ed Engl 2011; 50:2094-7. [PMID: 21344559 DOI: 10.1002/anie.201007309] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2010] [Revised: 12/31/2010] [Indexed: 11/07/2022]
Affiliation(s)
- Erik M Stang
- Department of Chemistry, Roger Adams Laboratory, University of Illinois, Urbana, IL 61801, USA
| | | |
Collapse
|
36
|
Stang EM, White MC. On the Macrocyclization of the Erythromycin Core: Preorganization is Not Required. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201007309] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
37
|
|
38
|
Jia YX, Katayev D, Bernardinelli G, Seidel T, Kündig E. New Chiral N-Heterocyclic Carbene Ligands in Palladium-Catalyzed α-Arylations of Amides: Conformational Locking through Allylic Strain as a Device for Stereocontrol. Chemistry 2010; 16:6300-9. [DOI: 10.1002/chem.201000031] [Citation(s) in RCA: 86] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
|
39
|
Syntheses and structural analyses of chiral rhenium containing amines of the formula (η5-C5H5)Re(NO)(PPh3)((CH2)nNRR′) (n=0, 1). Inorganica Chim Acta 2010. [DOI: 10.1016/j.ica.2009.03.047] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
40
|
Jung ME, Salehi-Rad R. Total synthesis of auripyrone A using a tandem non-aldol aldol/Paterson aldol process as a key step. Angew Chem Int Ed Engl 2010; 48:8766-9. [PMID: 19824033 DOI: 10.1002/anie.200904607] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Michael E Jung
- Department of Chemistry and Biochemistry, University of California, Los Angeles, 405 Hilgard Ave, Los Angeles, CA 90095-1569, USA.
| | | |
Collapse
|
41
|
Jung M, Salehi-Rad R. Total Synthesis of Auripyrone A Using a Tandem Non-Aldol Aldol/Paterson Aldol Process as a Key Step. Angew Chem Int Ed Engl 2009. [DOI: 10.1002/ange.200904607] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
42
|
Grošelj U, Schweizer W, Ebert MO, Seebach D. 5-Benzyl-3-methylimidazolidin-4-one-Derived Reactive Intermediates of Organocatalysis - A Comforting Resemblance of X-Ray, NMR, and DFT Solid-Phase, Liquid-Phase, and Gas-Phase Structures. Helv Chim Acta 2009. [DOI: 10.1002/hlca.200800432] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
43
|
Waldmann H, Hu TS, Renner S, Menninger S, Tannert R, Oda T, Arndt HD. Total Synthesis of Chondramide C and Its Binding Mode to F-Actin. Angew Chem Int Ed Engl 2008; 47:6473-7. [DOI: 10.1002/anie.200801010] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
44
|
Waldmann H, Hu TS, Renner S, Menninger S, Tannert R, Oda T, Arndt HD. Totalsynthese von Chondramid C und Bindung an F-Aktin. Angew Chem Int Ed Engl 2008. [DOI: 10.1002/ange.200801010] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
45
|
Schmauder A, Müller S, Maier ME. Concise route to defined stereoisomers of the hydroxy acid of the chondramides. Tetrahedron 2008; 64:6263-6269. [PMID: 22140278 DOI: 10.1016/j.tet.2008.04.109] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
The use of Kobayashi vinylogous aldol reaction in the reaction with acetaldehyde led to anti-aldol product 11. After reductive removal of the chiral auxiliary, the primary alcohol was converted to the allyliodide 14. This compound could be engaged in an Evans alkylation reaction, leading eventually to hydroxy acid 19. Inclusion of a Mitsunobu inversion reaction on the sequence starting with ent-11 led to hydroxy ester 30, featuring a 6,7-syn-configuration. These hydroxy acids should help to elucidate the correct stereostructure of the chondramide depsipeptides.
Collapse
Affiliation(s)
- Anke Schmauder
- Institut für Organische Chemie, Universität Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany
| | | | | |
Collapse
|
46
|
Owen G, Stahl J, Hampel F, Gladysz J. Coordination-Driven Self-Assembly, Structures, and Dynamic Properties of Diplatinum Hexatriynediyl and Butadiynediyl Complexes in which the sp Carbon Chains are Shielded by sp3Carbon Chains: Towards Endgroup-Endgroup Interactions. Chemistry 2007; 14:73-87. [DOI: 10.1002/chem.200701268] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
47
|
Zhou J, Ogle JW, Fan Y, Banphavichit V, Zhu Y, Burgess K. Asymmetric Hydrogenation Routes to Deoxypolyketide Chirons. Chemistry 2007; 13:7162-70. [PMID: 17582818 DOI: 10.1002/chem.200700390] [Citation(s) in RCA: 81] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Asymmetric hydrogenations of monoenes and dienes were performed to obtain terminal deoxypolyketide fragments A and the corresponding internal chirons B and C. The chiral N-heterocyclic carbene catalyst 1 was used throughout. Modest selectivities for hydrogenations of simple monoenes relayed into high selectivities for preparations of the terminal deoxypolyketide fragments in which either two hydrogenations or one and an optically pure starting material were used. Curiously, the face selectivities for hydrogenation of alpha,beta-unsaturated esters were consistently opposite to those that had been observed for styrene and stilbene derivatives in previous work, and to closely related allylic alcohol and ether derivatives in this work. Plausible mechanisms for this differing behavior were deduced by using DFT calculations. It appears that the origin of the unusual stereoselectivity for the ester derivatives is transient metal-coordination of the ester carbonyl whereas there is no evidence that the allylic alcohol or ethers coordinate. The routes developed to alpha,omega-functionalized internal deoxypolyketide fragments are extremely practical. These begin with the Roche ester being converted into alkene and, in one case, diene derivatives. Catalyst control prevails in the hydrogenations of these substrates, but there is a significant "substrate vector" (a term we used to describe the influence of the substrate on a catalyst-controlled reaction). This is determined by minimization of 1,3-allylic strain and, in some cases, syn pentane interactions. This substrate vector can be constructively paired with the (dominant) catalyst vector by use of the appropriate enantiomer of 1. In the hydrogenation of a diene derivative, two chiral centers could be formed simultaneously with overall 11:1.0 selectivity; this is the first time this has been achieved in any asymmetric synthesis of a deoxypolyketide fragment. Throughout, diastereoselectivities of the crude material in the syntheses of alpha,omega-functionalized internal deoxypolyketide fragments were in excess of 11:1.0 and chromatographically purified samples could be isolated in high yields with dr (dr=diastereomeric ratio) values consistently in excess of 40:1.0.
Collapse
Affiliation(s)
- Jianguang Zhou
- Department of Chemistry, Texas A&M University, P.O. Box 30012, College Station, TX 77842-3012, USA
| | | | | | | | | | | |
Collapse
|
48
|
Marimganti S, Wieneke R, Geyer A, Maier ME. Synthesis and Conformational Analysis of Geodiamolide Analogues. European J Org Chem 2007. [DOI: 10.1002/ejoc.200700024] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
49
|
Zhou J, Burgess K. Alpha,omega-functionalized 2,4-dimethylpentane dyads and 2,4,6-trimethylheptane triads through asymmetric hydrogenation. Angew Chem Int Ed Engl 2007; 46:1129-31. [PMID: 17200966 DOI: 10.1002/anie.200603635] [Citation(s) in RCA: 70] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Jianguang Zhou
- Department of Chemistry, Texas A & M University, Box 30012, College Station, TX 77841-3012, USA
| | | |
Collapse
|
50
|
Kay ER, Leigh DA, Zerbetto F. Synthetic molecular motors and mechanical machines. Angew Chem Int Ed Engl 2007; 46:72-191. [PMID: 17133632 DOI: 10.1002/anie.200504313] [Citation(s) in RCA: 2050] [Impact Index Per Article: 120.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The widespread use of controlled molecular-level motion in key natural processes suggests that great rewards could come from bridging the gap between the present generation of synthetic molecular systems, which by and large rely upon electronic and chemical effects to carry out their functions, and the machines of the macroscopic world, which utilize the synchronized movements of smaller parts to perform specific tasks. This is a scientific area of great contemporary interest and extraordinary recent growth, yet the notion of molecular-level machines dates back to a time when the ideas surrounding the statistical nature of matter and the laws of thermodynamics were first being formulated. Here we outline the exciting successes in taming molecular-level movement thus far, the underlying principles that all experimental designs must follow, and the early progress made towards utilizing synthetic molecular structures to perform tasks using mechanical motion. We also highlight some of the issues and challenges that still need to be overcome.
Collapse
Affiliation(s)
- Euan R Kay
- School of Chemistry, University of Edinburgh, The King's Buildings, West Mains Road, Edinburgh EH9 3JJ, UK
| | | | | |
Collapse
|