1
|
Liu B, Zhou X, Liu Q, Yang Z, Mao Y, He Q, Zhang T, Kong X, Zhang J, Liao W, Tang L. Carbene-Catalyzed [4+2] Cycloaddition of Cyclobutenones and Isatins for Quick Access to Chiral Chlorine-Containing Spirocyclic δ-Lactones. J Org Chem 2024; 89:7286-7294. [PMID: 38696309 DOI: 10.1021/acs.joc.4c00295] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/04/2024]
Abstract
Here we report a carbene-catalyzed enantio- and diastereoselective [4+2] cycloaddition reaction of cyclobutenones with isatins for the quick and efficient synthesis of spirocyclic δ-lactones bearing a chiral chlorine. A broad range of substrates with various substitution patterns proceed smoothly in this reaction, with the spirooxindole δ-lactone products afforded in generally good to excellent yields and optical purities under mild reaction conditions.
Collapse
Affiliation(s)
- Bin Liu
- Guizhou Provincial Engineering Technology Research Center for Chemical Drug R&D, School of Pharmacy, Guizhou Medical University, Guiyang 550004, China
| | - Xian Zhou
- Guizhou Provincial Engineering Technology Research Center for Chemical Drug R&D, School of Pharmacy, Guizhou Medical University, Guiyang 550004, China
| | - Qinqin Liu
- Guizhou Provincial Engineering Technology Research Center for Chemical Drug R&D, School of Pharmacy, Guizhou Medical University, Guiyang 550004, China
| | - Zaihui Yang
- Guizhou Provincial Engineering Technology Research Center for Chemical Drug R&D, School of Pharmacy, Guizhou Medical University, Guiyang 550004, China
| | - Yuanhu Mao
- Guizhou Provincial Engineering Technology Research Center for Chemical Drug R&D, School of Pharmacy, Guizhou Medical University, Guiyang 550004, China
| | - Qing He
- Guizhou Provincial Engineering Technology Research Center for Chemical Drug R&D, School of Pharmacy, Guizhou Medical University, Guiyang 550004, China
| | - Tianyuan Zhang
- Guizhou Provincial Engineering Technology Research Center for Chemical Drug R&D, School of Pharmacy, Guizhou Medical University, Guiyang 550004, China
| | - Xiangkai Kong
- Guizhou Provincial Engineering Technology Research Center for Chemical Drug R&D, School of Pharmacy, Guizhou Medical University, Guiyang 550004, China
| | - Jiquan Zhang
- Guizhou Provincial Engineering Technology Research Center for Chemical Drug R&D, School of Pharmacy, Guizhou Medical University, Guiyang 550004, China
| | - Weike Liao
- Guizhou Provincial Engineering Technology Research Center for Chemical Drug R&D, School of Pharmacy, Guizhou Medical University, Guiyang 550004, China
| | - Lei Tang
- Guizhou Provincial Engineering Technology Research Center for Chemical Drug R&D, School of Pharmacy, Guizhou Medical University, Guiyang 550004, China
| |
Collapse
|
2
|
Xiong TZ, Yisimayili N, Lu CD. Stereoselective Electrophilic Chlorination of β,β-Disubstituted Enesulfinamides with Chloramine-T: Asymmetric Synthesis of Acyclic α,α-Disubstituted α-Chlorinated Carbonyl Surrogates. Org Lett 2024; 26:1851-1856. [PMID: 38386702 DOI: 10.1021/acs.orglett.4c00059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/24/2024]
Abstract
Enamine and iminium ion-mediated asymmetric organocatalysis was not successful in achieving highly stereoselective α-chlorination of acyclic α,α-disubstituted carbonyls. To address this limitation, an alternative method was developed, which involved the use of geometry-defined persubstituted enesulfinamides to intercept the electrophilic chlorinating reagent. This approach enables the asymmetric construction of challenging acyclic α,α-disubstituted α-chlorinated ketimines with a high degree of stereoselectivity. The use of chloramine-T, a cost-effective and stable chlorine source rarely utilized in asymmetric electrophilic chlorination, plays a crucial role in achieving superior stereocontrol.
Collapse
Affiliation(s)
- Teng-Zhao Xiong
- School of Chemical Science and Technology, Yunnan University, Kunming, Yunnan 650091, China
| | | | - Chong-Dao Lu
- School of Chemical Science and Technology, Yunnan University, Kunming, Yunnan 650091, China
- School of Health, Jiangxi Normal University, Nanchang, Jiangxi 330022, China
| |
Collapse
|
3
|
Li Z, Wang B, Zhang C, Lo WY, Yang L, Sun J. Catalytic Enantioselective Nucleophilic α-Chlorination of Ketones with NaCl. J Am Chem Soc 2024; 146:2779-2788. [PMID: 38238317 DOI: 10.1021/jacs.3c12826] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2024]
Abstract
Catalytic enantioselective α-chlorination of ketones is a highly desirable process. Different from the conventional approaches that employ corrosive electrophilic chlorination reagents, the process disclosed here employs nucleophilic chloride, aqueous NaCl solution, and even seawater, as green inexpensive chlorine sources. This mechanistically distinct and electronically opposite approach provides facile access to diverse highly enantioenriched acyclic α-chloro ketones that are less straightforward by conventional approaches. With a chiral thiourea catalyst, a range of racemic α-keto sulfonium salts underwent enantioconvergent carbon-chlorine bond formation with high efficiency and excellent enantioselectivity under mild conditions. The sulfonium motif plays a crucial triple role by permitting smooth dynamic kinetic resolution to take place via a chiral anion binding mechanism in a well-designed phase-transfer system. This protocol represents a new general platform for the asymmetric nucleophilic α-functionalization of carbonyl compounds.
Collapse
Affiliation(s)
- Zhiyang Li
- Department of Chemistry and the Hong Kong Branch of Chinese National Engineering Research Centre for Tissue Restoration & Reconstruction, The Hong Kong University of Science and Technology (HKUST), Clear Water Bay, Kowloon, Hong Kong SAR 999077, China
- Shenzhen Research Institute, HKUST, No. 9 Yuexing First Rd, Shenzhen 518057, China
| | - Baocheng Wang
- Department of Chemistry and the Hong Kong Branch of Chinese National Engineering Research Centre for Tissue Restoration & Reconstruction, The Hong Kong University of Science and Technology (HKUST), Clear Water Bay, Kowloon, Hong Kong SAR 999077, China
| | - Chaoshen Zhang
- Department of Chemistry and the Hong Kong Branch of Chinese National Engineering Research Centre for Tissue Restoration & Reconstruction, The Hong Kong University of Science and Technology (HKUST), Clear Water Bay, Kowloon, Hong Kong SAR 999077, China
| | - Wai Yam Lo
- Department of Chemistry and the Hong Kong Branch of Chinese National Engineering Research Centre for Tissue Restoration & Reconstruction, The Hong Kong University of Science and Technology (HKUST), Clear Water Bay, Kowloon, Hong Kong SAR 999077, China
| | - Liangliang Yang
- Department of Chemistry and the Hong Kong Branch of Chinese National Engineering Research Centre for Tissue Restoration & Reconstruction, The Hong Kong University of Science and Technology (HKUST), Clear Water Bay, Kowloon, Hong Kong SAR 999077, China
| | - Jianwei Sun
- Department of Chemistry and the Hong Kong Branch of Chinese National Engineering Research Centre for Tissue Restoration & Reconstruction, The Hong Kong University of Science and Technology (HKUST), Clear Water Bay, Kowloon, Hong Kong SAR 999077, China
- Shenzhen Research Institute, HKUST, No. 9 Yuexing First Rd, Shenzhen 518057, China
| |
Collapse
|
4
|
Christin O, Roulland E. Advancements in Enacyloxins Total Synthesis: Access to the Chlorinated Polyunsaturated Chain Peculiar to this Promising Family of Antibiotics. Org Lett 2023; 25:6869-6874. [PMID: 37676860 DOI: 10.1021/acs.orglett.3c02477] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/09/2023]
Abstract
The first synthesis of the protected chain specific to the enacyloxin antibiotic family is reported. The noticeable features are (a) the construction of the chlorinated undecapentaenoic moiety implementing the sequence Tsuji's alkyne syn allyl-chlorination, E-selective Pd/Cu-catalyzed allene-alkyne coupling, Horner-Wadsworth-Emmons olefination, dehydration; (b) control of the C18 chlorinated stereogenic center by organo-catalyzed aldehyde α-chlorination; and (c) the assemblage of this aldehyde with the C1-C16 ketone using a highly diastereoselective Mukaiyama aldol.
Collapse
Affiliation(s)
- Orane Christin
- CiTCoM, UMR 8038, CNRS-Université Paris Cité, Faculté de Pharmacie, 4, avenue de l'Observatoire, 75006 Paris, France
| | - Emmanuel Roulland
- CiTCoM, UMR 8038, CNRS-Université Paris Cité, Faculté de Pharmacie, 4, avenue de l'Observatoire, 75006 Paris, France
| |
Collapse
|
5
|
Lazib Y, Naves JG, Labande A, Dauban P, Saget T. Asymmetric Syntheses of Enantioenriched 2,5-Disubstituted Pyrrolidines. ACS ORGANIC & INORGANIC AU 2023; 3:120-129. [PMID: 37303503 PMCID: PMC10251504 DOI: 10.1021/acsorginorgau.2c00061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Revised: 02/17/2023] [Accepted: 02/22/2023] [Indexed: 06/13/2023]
Abstract
C2-Symmetrical scaffolds are privileged ligands in metal catalysis and are also widely used in organocatalysis. Among these, 2,5-disubstituted pyrrolidines hold a paramount importance, especially since they also find application in medicinal chemistry. This review highlights the stereoselective syntheses of these C2-symmetrical nitrogen heterocycles. It includes synthetic strategies based on the use of the chiral pool as well as the more recent sequences designed following major achievements in asymmetric catalysis.
Collapse
Affiliation(s)
- Yanis Lazib
- Université
Paris-Saclay, CNRS, Institut de Chimie des Substances Naturelles, UPR 2301, 91198 Gif-sur-Yvette, France
| | - Junio Guimaraes Naves
- Université
Paris-Saclay, CNRS, Institut de Chimie des Substances Naturelles, UPR 2301, 91198 Gif-sur-Yvette, France
| | - Agnès Labande
- LCC-CNRS, Université de Toulouse, CNRS, INPT, 205 route de Narbonne, 31077 Toulouse, France
| | - Philippe Dauban
- Université
Paris-Saclay, CNRS, Institut de Chimie des Substances Naturelles, UPR 2301, 91198 Gif-sur-Yvette, France
| | - Tanguy Saget
- Université
Paris-Saclay, CNRS, Institut de Chimie des Substances Naturelles, UPR 2301, 91198 Gif-sur-Yvette, France
| |
Collapse
|
6
|
Conforti I, Benzi A, Caffa I, Bruzzone S, Nencioni A, Marra A. Iminosugar-Based Nicotinamide Phosphoribosyltransferase (NAMPT) Inhibitors as Potential Anti-Pancreatic Cancer Agents. Pharmaceutics 2023; 15:pharmaceutics15051472. [PMID: 37242714 DOI: 10.3390/pharmaceutics15051472] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Revised: 04/28/2023] [Accepted: 05/09/2023] [Indexed: 05/28/2023] Open
Abstract
The nicotinamide phosphoribosyltransferase (NAMPT) is considered a very promising therapeutic target because it is overexpressed in pancreatic cancer. Although many inhibitors have been prepared and tested, clinical trials have shown that NAMPT inhibition may result in severe haematological toxicity. Therefore, the development of conceptually new inhibitors is an important and challenging task. We synthesized ten β-d-iminoribofuranosides bearing various heterocycle-based chains carbon-linked to the anomeric position starting from non-carbohydrate derivatives. They were then submitted to NAMPT inhibition assays, as well as to pancreatic tumor cells viability and intracellular NAD+ depletion evaluation. The biological activity of the compounds was compared to that of the corresponding analogues lacking the carbohydrate unit to assess, for the first time, the contribution of the iminosugar moiety to the properties of these potential antitumor agents.
Collapse
Affiliation(s)
- Irene Conforti
- Institut des Biomolécules Max Mousseron (IBMM, UMR 5247), Université de Montpellier, Pôle Chimie Balard Recherche, 1919 Route de Mende, CEDEX 5, 34293 Montpellier, France
| | - Andrea Benzi
- Dipartimento di Medicina Sperimentale-DIMES, Scuola di Scienze Mediche e Farmaceutiche, Università degli Studi di Genova, Viale Benedetto XV 1, 16132 Genova, Italy
| | - Irene Caffa
- Dipartimento di Medicina Interna e Specialità Mediche-DIMI, Università degli Studi di Genova, Viale Benedetto XV 6, 16132 Genova, Italy
- IRCCS, Ospedale Policlinico San Martino, 16132 Genova, Italy
| | - Santina Bruzzone
- Dipartimento di Medicina Sperimentale-DIMES, Scuola di Scienze Mediche e Farmaceutiche, Università degli Studi di Genova, Viale Benedetto XV 1, 16132 Genova, Italy
- IRCCS, Ospedale Policlinico San Martino, 16132 Genova, Italy
| | - Alessio Nencioni
- Dipartimento di Medicina Interna e Specialità Mediche-DIMI, Università degli Studi di Genova, Viale Benedetto XV 6, 16132 Genova, Italy
- IRCCS, Ospedale Policlinico San Martino, 16132 Genova, Italy
| | - Alberto Marra
- Institut des Biomolécules Max Mousseron (IBMM, UMR 5247), Université de Montpellier, Pôle Chimie Balard Recherche, 1919 Route de Mende, CEDEX 5, 34293 Montpellier, France
| |
Collapse
|
7
|
Kaghad A, Panagopoulos D, Caballero-García G, Zhai H, Britton R. An α-chloroaldehyde-based formal synthesis of eribulin. Nat Commun 2023; 14:1904. [PMID: 37019928 PMCID: PMC10076431 DOI: 10.1038/s41467-023-37346-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2022] [Accepted: 03/10/2023] [Indexed: 04/07/2023] Open
Abstract
Eribulin (Halaven) is the most structurally complex non-peptidic drug made by total synthesis and has challenged preconceptions of synthetic feasibility in drug discovery and development. However, despite decades of research, the synthesis and manufacture of eribulin remains a daunting task. Here, we report syntheses of the most complex fragment of eribulin (C14-C35) used in two distinct industrial routes to this important anticancer drug. Our convergent strategy relies on a doubly diastereoselective Corey-Chaykovsky reaction to affect the union of two tetrahydrofuran-containing subunits. Notably, this process relies exclusively on enantiomerically enriched α-chloroaldehydes as building blocks for constructing the three densely functionalized oxygen heterocycles found in the C14-C35 fragment and all associated stereocenters. Overall, eribulin can now be produced in a total of 52 steps, which is a significant reduction from that reported in both academic and industrial syntheses.
Collapse
Affiliation(s)
- Anissa Kaghad
- Department of Chemistry, Simon Fraser University, Burnaby, British Columbia, V5A 1S6, Canada
| | - Dimitrios Panagopoulos
- Department of Chemistry, Simon Fraser University, Burnaby, British Columbia, V5A 1S6, Canada
| | | | - Huimin Zhai
- Department of Chemistry, Simon Fraser University, Burnaby, British Columbia, V5A 1S6, Canada
| | - Robert Britton
- Department of Chemistry, Simon Fraser University, Burnaby, British Columbia, V5A 1S6, Canada.
| |
Collapse
|
8
|
Kuang Y, Lai J, Reid JP. Transferrable selectivity profiles enable prediction in synergistic catalyst space. Chem Sci 2023; 14:1885-1895. [PMID: 36819850 PMCID: PMC9931051 DOI: 10.1039/d2sc05974f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Accepted: 01/10/2023] [Indexed: 01/19/2023] Open
Abstract
Organometallic intermediates participate in many multi-catalytic enantioselective transformations directed by a chiral catalyst, but the requirement of optimizing two catalyst components is a significant barrier to widely adopting this approach for chiral molecule synthesis. Algorithms can potentially accelerate the screening process by developing quantitative structure-function relationships from large experimental datasets. However, the chemical data available in this catalyst space is limited. Herein, we report a data-driven strategy that effectively translates selectivity relationships trained on enantioselectivity outcomes derived from one catalyst reaction systems where an abundance of data exists, to synergistic catalyst space. We describe three case studies involving different modes of catalysis (Brønsted acid, chiral anion, and secondary amine) that substantiate the prospect of this approach to predict and elucidate selectivity in reactions where more than one catalyst is involved. Ultimately, the success in applying our approach to diverse areas of asymmetric catalysis implies that this general workflow should find broad use in the study and development of new enantioselective, multi-catalytic processes.
Collapse
Affiliation(s)
- Yutao Kuang
- Department of Chemistry, University of British Columbia 2036 Main Mall, Vancouver British Columbia V6T 1Z1 Canada
| | - Junshan Lai
- Department of Chemistry, University of British Columbia 2036 Main Mall, Vancouver British Columbia V6T 1Z1 Canada
| | - Jolene P. Reid
- Department of Chemistry, University of British Columbia2036 Main Mall, VancouverBritish ColumbiaV6T 1Z1Canada
| |
Collapse
|
9
|
Sharley JS, Gambacorta G, Collado Pérez AM, Ferri EE, Miranda AF, Fernández IF, Quesada JS, Baxendale IR. A simple one-pot oxidation protocol for the synthesis of dehydrohedione from Hedione. Tetrahedron 2022. [DOI: 10.1016/j.tet.2022.133068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
|
10
|
Zhang Y, Li X, Xu L, Xie X, Lu Y, Zhang Z. Ru-Catalyzed Enantioselective Hydrogenation of Diaryl 1,4-Diketones: Synthesis of Chiral 1,4-Diarylbutane-1,4-Diols. Org Lett 2022; 24:7512-7516. [PMID: 36214421 DOI: 10.1021/acs.orglett.2c02721] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Asymmetric hydrogenation of diaryl 1,4-diketones was achieved by using trans-RuCl2[(S)-BINAP)][(S)-Daipen] as the catalyst and the reaction gave rise to excellent enantio- and diastereoselectivities (up to >99% ee and de). This procedure provides a convenient and efficient synthetic method for chiral 1,4-diarylbutane-1,4-diols, which are important intermediates for a variety of chiral auxiliaries and ligands.
Collapse
Affiliation(s)
- Yuxuan Zhang
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Xiaotong Li
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Limin Xu
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Xiaomin Xie
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Yan Lu
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Zhaoguo Zhang
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| |
Collapse
|
11
|
Hutchinson G, Alamillo-Ferrer C, Fernández-Pascual M, Burés J. Organocatalytic Enantioselective α-Bromination of Aldehydes with N-Bromosuccinimide. J Org Chem 2022; 87:7968-7974. [PMID: 35617931 PMCID: PMC9207931 DOI: 10.1021/acs.joc.2c00600] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/04/2022]
Abstract
![]()
Despite the wealth
of existing organocatalytic, enantioselective
transformations, the α-bromination of aldehydes remains a challenging
reaction. The four examples reported to date require expensive, inconvenient
brominating agents to achieve the desired products in excellent yields
and enantioselectivities. The preferred brominating agent, N-bromosuccinimide (NBS), has been repeatedly discarded
for these reactions because it results in low yields and relatively
poor enantioselectivities. We describe a methodology that uses NBS
and performs excellently with low catalyst loadings, short reaction
times, and mild temperatures.
Collapse
Affiliation(s)
- George Hutchinson
- The University of Manchester, Department of Chemistry, Oxford Road, M13 9PL Manchester, U.K
| | - Carla Alamillo-Ferrer
- The University of Manchester, Department of Chemistry, Oxford Road, M13 9PL Manchester, U.K
| | | | - Jordi Burés
- The University of Manchester, Department of Chemistry, Oxford Road, M13 9PL Manchester, U.K
| |
Collapse
|
12
|
Ou W, Wang R, Liu R, Huang H. An Improved and Suitable Method for Large Scale Production of
α-Monochlorocyclodecanone. LETT ORG CHEM 2022. [DOI: 10.2174/1570178618666210217121023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
:
α-Monochlorocyclododecanone was synthesized from cyclododecane and 1,3-Dichloro-5,5-dimethylhydantoin (DCDMH) catalyzed with silica gel in MeOH. The product was obtained by crystallization with nearly 85% yield. The presented method used cheap raw materials, mild reaction conditions, simple separation method and environment-friendly process. Additionally, the current synthesis provided an ideal approach for large-scale production.
Collapse
Affiliation(s)
- Wenhua Ou
- School of Perfume and Aroma Technology, Shanghai Institute of Technology, Shanghai, 200235, China
| | - Ruolin Wang
- School of Perfume and Aroma Technology, Shanghai Institute of Technology, Shanghai, 200235, China
| | - Ruonan Liu
- School of Perfume and Aroma Technology, Shanghai Institute of Technology, Shanghai, 200235, China
| | - Hong Huang
- College of
Marine Ecology and Environment, Shanghai Ocean University, Shanghai 201306, China
| |
Collapse
|
13
|
Wannenmacher N, Keim N, Frey W, Peters R. Catalytic Asymmetric Chlorination of Isoxazolinones. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
| | - Noah Keim
- University of Stuttgart: Universitat Stuttgart Chemistry GERMANY
| | - Wolfgang Frey
- University of Stuttgart: Universitat Stuttgart Chemistry GERMANY
| | - René Peters
- Universität Stuttgart Institut für Organische Chemie Pfaffenwaldring 55Raum 06.301 70569 Stuttgart GERMANY
| |
Collapse
|
14
|
Nishimura K, Wang Y, Ogura Y, Kumagai J, Ishihara K. A π–Cu(II)−π Complex as an Extremely Active Catalyst for Enantioselective α-Halogenation of N-Acyl-3,5-dimethylpyrazoles. ACS Catal 2022. [DOI: 10.1021/acscatal.1c05500] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Kazuki Nishimura
- Graduate School of Engineering, Nagoya University, Furo-cho, Nagoya 464-8603, Japan
| | - Yanzhao Wang
- Graduate School of Engineering, Nagoya University, Furo-cho, Nagoya 464-8603, Japan
| | - Yoshihiro Ogura
- Graduate School of Engineering, Nagoya University, Furo-cho, Nagoya 464-8603, Japan
| | - Jun Kumagai
- Graduate School of Engineering, Nagoya University, Furo-cho, Nagoya 464-8603, Japan
| | - Kazuaki Ishihara
- Graduate School of Engineering, Nagoya University, Furo-cho, Nagoya 464-8603, Japan
| |
Collapse
|
15
|
Yan J, Zhou Z, He Q, Chen G, Wei H, Xie W. The applications of catalytic asymmetric halocyclization in natural product synthesis. Org Chem Front 2022. [DOI: 10.1039/d1qo01395e] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Catalytic asymmetric halocyclization of olefinic substrate has evolved rapidly and been well utilized as a practical strategy for constructing enantioenriched cyclic skeletons in natural product synthesis.
Collapse
Affiliation(s)
- Jiahang Yan
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, 22 Xinong Road, Yangling 712100, Shaanxi, China
| | - Zhiqiang Zhou
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, 22 Xinong Road, Yangling 712100, Shaanxi, China
| | - Qiaoqiao He
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, 22 Xinong Road, Yangling 712100, Shaanxi, China
| | - Guzhou Chen
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, 22 Xinong Road, Yangling 712100, Shaanxi, China
| | - Hongbo Wei
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, 22 Xinong Road, Yangling 712100, Shaanxi, China
| | - Weiqing Xie
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, 22 Xinong Road, Yangling 712100, Shaanxi, China
- Key Laboratory of Botanical Pesticide R&D in Shaanxi Province, Yangling, Shaanxi 712100, China
| |
Collapse
|
16
|
Song J, Shao PL, Wang J, Huang F, Zhang X. Asymmetric hydrogenation of 1,4-diketones: facile synthesis of enantiopure 1,4-diarylbutane-1,4-diols. Chem Commun (Camb) 2021; 58:262-265. [PMID: 34878456 DOI: 10.1039/d1cc05359k] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Owing to the biological significance and great synthetic value of 1,4-diarylbutane-1,4-diols and their derivatives, increasingly considerable attention has been paid to developing effective synthetic methods for chiral 1,4-diarylbutane-1,4-diols. We herein report an efficient asymmetric hydrogenation of 1,4-diaryldiketones catalyzed by a chiral iridium complex bearing f-amphox as ligand, furnishing a series of 1,4-diarylbutane-1,4-diols in excellent yields (up to >99%) with exceptional enantioselectivities (up to >99.9% ee) and diastereoselectivities (up to >100 : 1 dr).
Collapse
Affiliation(s)
- Jingyuan Song
- School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China.,Guangdong Provincial Key Laboratory of Catalysis, Department of Chemistry, Southern University of Science and Technology, 1088 Xueyuan Road, Shenzhen, 518055, China.
| | - Pan-Lin Shao
- Guangdong Provincial Key Laboratory of Catalysis, Department of Chemistry, Southern University of Science and Technology, 1088 Xueyuan Road, Shenzhen, 518055, China. .,College of Innovation and Entrepreneurship, Southern University of Science and Technology, 1088 Xueyuan Road, Shenzhen 518055, China
| | - Jiang Wang
- Guangdong Provincial Key Laboratory of Catalysis, Department of Chemistry, Southern University of Science and Technology, 1088 Xueyuan Road, Shenzhen, 518055, China.
| | - Fanping Huang
- Guangdong Provincial Key Laboratory of Catalysis, Department of Chemistry, Southern University of Science and Technology, 1088 Xueyuan Road, Shenzhen, 518055, China.
| | - Xumu Zhang
- Guangdong Provincial Key Laboratory of Catalysis, Department of Chemistry, Southern University of Science and Technology, 1088 Xueyuan Road, Shenzhen, 518055, China. .,Medi-X Pingshan, Southern University of Science and Technology, Shenzhen, Guangdong, 518118, China
| |
Collapse
|
17
|
Mohr LM, McCulley CH, Blom J, Lamhauge JN, Anker Jørgensen K. Investigation of the Organocatalytic Chlorination of 2-Phenylpropanal. Chemistry 2021; 27:17465-17475. [PMID: 34622997 DOI: 10.1002/chem.202103376] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Indexed: 11/08/2022]
Abstract
Results of an examination of the organocatalytic enantioselective α-chlorination of 2-phenylpropanal are described. Synthetic investigation including the screening of primary and secondary aminocatalysts, many different reaction conditions, and other α-branched aldehydes show that especially primary aminocatalysts can catalyze the formation of the α-chloro branched aldehydes in good yields, but only with moderate enantioselectivities. In order to try to understand the challenge in obtaining high enantioselectivity for the aminocatalytic α-chlorination of α-branched aldehydes a series of experimental investigations were performed employing 2-phenylpropanal as a model system. These investigations have been coupled with computational investigations, which provided important insight into the moderate enantioselectivity of this chlorination reaction. Analysis of the reaction showed, that the lack of control over the selectivity of formation of the (E)- and (Z)-enamine intermediate, and the clustering of reaction barriers of possible reaction pathways help to rationalize difficulties in producing high enantioselectivity.
Collapse
Affiliation(s)
- Lisa-Marie Mohr
- Department of Chemistry, Aarhus University, 8000, Aarhus, Denmark
| | | | - Jakob Blom
- Department of Chemistry, Aarhus University, 8000, Aarhus, Denmark
| | | | | |
Collapse
|
18
|
Abstract
RNA-based therapeutics have shown great promise in treating a broad spectrum of diseases through various mechanisms including knockdown of pathological genes, expression of therapeutic proteins, and programmed gene editing. Due to the inherent instability and negative-charges of RNA molecules, RNA-based therapeutics can make the most use of delivery systems to overcome biological barriers and to release the RNA payload into the cytosol. Among different types of delivery systems, lipid-based RNA delivery systems, particularly lipid nanoparticles (LNPs), have been extensively studied due to their unique properties, such as simple chemical synthesis of lipid components, scalable manufacturing processes of LNPs, and wide packaging capability. LNPs represent the most widely used delivery systems for RNA-based therapeutics, as evidenced by the clinical approvals of three LNP-RNA formulations, patisiran, BNT162b2, and mRNA-1273. This review covers recent advances of lipids, lipid derivatives, and lipid-derived macromolecules used in RNA delivery over the past several decades. We focus mainly on their chemical structures, synthetic routes, characterization, formulation methods, and structure-activity relationships. We also briefly describe the current status of representative preclinical studies and clinical trials and highlight future opportunities and challenges.
Collapse
Affiliation(s)
- Yuebao Zhang
- Division of Pharmaceutics & Pharmacology, College of Pharmacy, The Ohio State University, Columbus, Ohio 43210, United States
| | - Changzhen Sun
- Division of Pharmaceutics & Pharmacology, College of Pharmacy, The Ohio State University, Columbus, Ohio 43210, United States
| | - Chang Wang
- Division of Pharmaceutics & Pharmacology, College of Pharmacy, The Ohio State University, Columbus, Ohio 43210, United States
| | - Katarina E Jankovic
- Division of Pharmaceutics & Pharmacology, College of Pharmacy, The Ohio State University, Columbus, Ohio 43210, United States
| | - Yizhou Dong
- Division of Pharmaceutics & Pharmacology, College of Pharmacy, The Ohio State University, Columbus, Ohio 43210, United States
- Department of Biomedical Engineering, The Center for Clinical and Translational Science, The Comprehensive Cancer Center, Dorothy M. Davis Heart & Lung Research Institute, Department of Radiation Oncology, The Ohio State University, Columbus, Ohio 43210, United States
| |
Collapse
|
19
|
Hughes DL. Review of Synthetic Routes and Crystalline Forms of the Oncology Drugs Capmatinib, Selpercatinib, and Pralsetinib. Org Process Res Dev 2021. [DOI: 10.1021/acs.oprd.1c00282] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- David L. Hughes
- Cidara Therapeutics6755 Mira Mesa Boulevard, Suite
123-217, San Diego, California 92121, United States
| |
Collapse
|
20
|
Grell Y, Xie X, Ivlev SI, Meggers E. Enantioselective α-Fluorination and α-Chlorination of N-Acyl Pyrazoles Catalyzed by a Non- C2-Symmetric Chiral-at-Rhodium Catalyst. ACS Catal 2021. [DOI: 10.1021/acscatal.1c02901] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yvonne Grell
- Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Strasse 4, 35043 Marburg, Germany
| | - Xiulan Xie
- Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Strasse 4, 35043 Marburg, Germany
| | - Sergei I. Ivlev
- Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Strasse 4, 35043 Marburg, Germany
| | - Eric Meggers
- Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Strasse 4, 35043 Marburg, Germany
| |
Collapse
|
21
|
Abstract
Glycomimetics are structural mimics of naturally occurring carbohydrates and represent important therapeutic leads in several disease treatments. However, the structural and stereochemical complexity inherent to glycomimetics often challenges medicinal chemistry efforts and is incompatible with diversity-oriented synthesis approaches. Here, we describe a one-pot proline-catalyzed aldehyde α-functionalization/aldol reaction that produces an array of stereochemically well-defined glycomimetic building blocks containing fluoro, chloro, bromo, trifluoromethylthio and azodicarboxylate functional groups. Using density functional theory calculations, we demonstrate both steric and electrostatic interactions play key diastereodiscriminating roles in the dynamic kinetic resolution. The utility of this simple process for generating large and diverse libraries of glycomimetics is demonstrated in the rapid production of iminosugars, nucleoside analogues, carbasugars and carbohydrates from common intermediates.
Collapse
|
22
|
Hutchinson G, Alamillo-Ferrer C, Burés J. Mechanistically Guided Design of an Efficient and Enantioselective Aminocatalytic α-Chlorination of Aldehydes. J Am Chem Soc 2021; 143:6805-6809. [PMID: 33929823 PMCID: PMC8297727 DOI: 10.1021/jacs.1c02997] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
![]()
The enantioselective aminocatalytic
α-chlorination of aldehydes
is a challenging reaction because of its tendency to proceed through
neutral intermediates in unselective pathways. Herein we report the
rational shift to a highly selective reaction pathway involving charged
intermediates using hexafluoroisopropanol as solvent. This change
in mechanism has enabled us to match and improve upon the yields and
enantioselectivities displayed by previous methods while using cheaper
aminocatalysts and chlorinating agents, 80–95% less amount
of catalyst, convenient temperatures, and shorter reaction times.
Collapse
Affiliation(s)
- George Hutchinson
- Department of Chemistry, The University of Manchester, Oxford Road, M13 9PL Manchester, U.K
| | - Carla Alamillo-Ferrer
- Department of Chemistry, The University of Manchester, Oxford Road, M13 9PL Manchester, U.K
| | - Jordi Burés
- Department of Chemistry, The University of Manchester, Oxford Road, M13 9PL Manchester, U.K
| |
Collapse
|
23
|
Quintard A. Copper Catalyzed Decarboxylative Functionalization of Ketoacids. CHEM REC 2021; 21:3382-3393. [PMID: 33750015 DOI: 10.1002/tcr.202100045] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2021] [Revised: 03/08/2021] [Accepted: 03/09/2021] [Indexed: 12/30/2022]
Abstract
Selective copper catalyzed activation of ketoacids and notably bio-sourced 1,3-acetonedicarboxylic acid, represents an attractive strategy to solve key synthetic challenges. Condensation with aldehydes under exceedingly mild conditions can create more rapidly known natural products scaffolds such as 1,3 polyols. In this account, the recent progress in this field, notably through multicatalytic combination with organocatalysis is described. In addition to the rapid preparation of natural product fragments, cascade incorporation of fluorine also provided new type of synthetic analogues of improved properties in a broad range of applications.
Collapse
Affiliation(s)
- Adrien Quintard
- Aix Marseille Univ, CNRS, Centrale Marseille, iSm2, Marseille, France
| |
Collapse
|
24
|
Challa VR, Kwon D, Taron M, Fan H, Kang B, Wilson D, Haeckl FPJ, Keerthisinghe S, Linington RG, Britton R. Total synthesis of biselide A. Chem Sci 2021; 12:5534-5543. [PMID: 34168790 PMCID: PMC8179649 DOI: 10.1039/d0sc06223e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Accepted: 02/15/2021] [Indexed: 12/02/2022] Open
Abstract
A total synthesis of the marine macrolide biselide A is described that relies on an enantiomerically enriched α-chloroaldehyde as the sole chiral building block. Several strategies to construct the macrocycle are presented including a macrocyclic Reformatsky reaction that ultimately provides access to the natural product in a longest linear sequence of 18 steps. Biological testing of synthetic biselide A suggests this macrolide disrupts cell division through a mechanism related to the regulation of microtubule cytoskeleton organization. Overall, this concise synthesis and insight gained into the mechanism of action should inspire medicinal chemistry efforts directed at structurally related anticancer marine macrolides.
Collapse
Affiliation(s)
- Venugopal Rao Challa
- Department of Chemistry, Simon Fraser University Burnaby British Columbia V5A 1S6 Canada
| | - Daniel Kwon
- Department of Chemistry, Simon Fraser University Burnaby British Columbia V5A 1S6 Canada
| | - Matthew Taron
- Department of Chemistry, Simon Fraser University Burnaby British Columbia V5A 1S6 Canada
| | - Hope Fan
- Department of Chemistry, Simon Fraser University Burnaby British Columbia V5A 1S6 Canada
| | - Baldip Kang
- Department of Chemistry, Simon Fraser University Burnaby British Columbia V5A 1S6 Canada
| | - Darryl Wilson
- Department of Chemistry, Simon Fraser University Burnaby British Columbia V5A 1S6 Canada
| | - F P Jake Haeckl
- Department of Chemistry, Simon Fraser University Burnaby British Columbia V5A 1S6 Canada
| | - Sandra Keerthisinghe
- Department of Chemistry, Simon Fraser University Burnaby British Columbia V5A 1S6 Canada
| | - Roger G Linington
- Department of Chemistry, Simon Fraser University Burnaby British Columbia V5A 1S6 Canada
| | - Robert Britton
- Department of Chemistry, Simon Fraser University Burnaby British Columbia V5A 1S6 Canada
| |
Collapse
|
25
|
Chevis PJ, Pyne SG. Synthesis of enantioenriched α-heteroatom functionalised aldehydes by chiral organocatalysis and their synthetic applications. Org Chem Front 2021. [DOI: 10.1039/d1qo00101a] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Asymmetric organocatalysis is a versatile method for the enantioselective α-functionalisation of aldehydes. The synthetic scope for chiral α-heteroatom substituted aldehydes is examined including their applications in synthesis.
Collapse
Affiliation(s)
- Philip J. Chevis
- School of Chemistry and Molecular Bioscience
- University of Wollongong
- Wollongong
- Australia
| | - Stephen G. Pyne
- School of Chemistry and Molecular Bioscience
- University of Wollongong
- Wollongong
- Australia
| |
Collapse
|
26
|
Shao YD, Han DD, Dong MM, Yang XR, Cheng DJ. A one-pot stepwise approach to axially chiral quinoline-3-carbaldehydes enabled by iminium–allenamine cascade catalysis. Org Chem Front 2021. [DOI: 10.1039/d0qo01339k] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
An organocatalytic atroposelective annulation between 2-(tosylamino)aryl ketones and 2-alkynals for the construction of enantioenriched axially chiral 4-arylquinoline-3-carbaldehydes is achieved.
Collapse
Affiliation(s)
- You-Dong Shao
- School of Chemistry and Chemical Engineering
- Heze University
- China
| | - Dan-Dan Han
- School of Chemistry and Chemical Engineering
- Heze University
- China
| | - Meng-Meng Dong
- School of Chemistry and Chemical Engineering
- Heze University
- China
| | - Xin-Ru Yang
- School of Chemistry and Chemical Engineering
- Heze University
- China
| | - Dao-Juan Cheng
- School of Pharmacy
- Anhui University of Chinese Medicine
- China
- School of Chemistry and Chemical Engineering
- Heze University
| |
Collapse
|
27
|
Mechanistic investigation on the remote stereocontrol in the chiral Lewis base-catalyzed, SiCl4-promoted kinetic resolution of chlorinated cis-vinyl epoxides. Tetrahedron 2021. [DOI: 10.1016/j.tet.2020.131763] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
28
|
Kim B, Kim Y, Lee SY. Stereodivergent Carbon-Carbon Bond Formation between Iminium and Enolate Intermediates by Synergistic Organocatalysis. J Am Chem Soc 2020; 143:73-79. [PMID: 33356216 DOI: 10.1021/jacs.0c11077] [Citation(s) in RCA: 65] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
We report here a stereodivergent method for the Michael addition of aryl acetic acid esters to α,β-unsaturated aldehydes catalyzed by a combination of a chiral pyrrolidine and a chiral Lewis base. This reaction proceeds through a synergistic catalytic cycle which consists of one cycle leading to a chiral iminium electrophile and a second cycle generating a nucleophilic chiral enolate for the construction of a carbon-carbon bond. By varying the combinations of catalyst enantiomers, all four stereoisomers of the products with two vicinal stereocenters are accessible with high enantio- and diastereoselectivity. The products of the Michael addition, 1,5-aldehyde esters, can be readily transformed into a variety of other valuable enantioenriched structures, including those bearing three contiguous stereocenters in an acyclic system, thus providing an efficient route to an array of structural and stereochemical diversity.
Collapse
Affiliation(s)
- Byungjun Kim
- Department of Chemistry, Yonsei University, Seoul 03722, Republic of Korea
| | - Yongjae Kim
- Department of Chemistry, Yonsei University, Seoul 03722, Republic of Korea
| | - Sarah Yunmi Lee
- Department of Chemistry, Yonsei University, Seoul 03722, Republic of Korea
| |
Collapse
|
29
|
Abstract
A wide range of methodologies for the preparation of organic azides has been reported in the literature for many decades, due to their interest as building blocks for different transformations and their applications in biology as well as in materials science. More recently, with the spread of the use of transition metal-catalyzed reactions, new perspectives have also materialized in azidation processes, especially concerning the azidation of C–H bonds and direct difunctionalization of multiple carbon-carbon bonds. In this review, special emphasis will be placed on reactions involving substrates bearing a leaving group, hydroazidation reactions and azidation reactions that proceed with the formation of more than one bond. Further reactions for the preparation of allyl and vinyl azides as well as for azidations involving the opening of a ring complete the classification of the material.
Collapse
|
30
|
Rodríguez-Alvarado M, Russo R, Connell ND, Brenner-Moyer SE. Design, organocatalytic synthesis, and bioactivity evaluation of enantiopure fluorinated LpxC inhibitors. Org Biomol Chem 2020; 18:5867-5878. [PMID: 32671374 DOI: 10.1039/d0ob01125h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/25/2024]
Abstract
Enantiopure compounds with a strategically incorporated fluorine atom intended to enhance LpxC inhibition have been synthesized using an organocascade fluorination reaction as the key step. These are the first low molecular weight LpxC inhibitors to contain a fluorine atom on a critically important chiral center that is substituted with two pharmacophoric moieties, and were thusly designed to provide new SAR data for this class of compounds. Fluorinated compounds were evaluated against ESKAPE pathogens and exhibited MICs of ≤12.5 μg mL-1 against Pseudomonas aeruginosa.
Collapse
Affiliation(s)
| | - Riccardo Russo
- Department of Medicine, Rutgers New Jersey Medical School, 185 South Orange Avenue, Newark, NJ 07103, USA
| | - Nancy D Connell
- Department of Medicine, Rutgers New Jersey Medical School, 185 South Orange Avenue, Newark, NJ 07103, USA
| | - Stacey E Brenner-Moyer
- Department of Chemistry, Rutgers University-Newark, 73 Warren Street, Newark, NJ 07102, USA.
| |
Collapse
|
31
|
McHowat J, Shakya S, Ford DA. 2-Chlorofatty Aldehyde Elicits Endothelial Cell Activation. Front Physiol 2020; 11:460. [PMID: 32457656 PMCID: PMC7225355 DOI: 10.3389/fphys.2020.00460] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Accepted: 04/16/2020] [Indexed: 12/12/2022] Open
Abstract
Endothelial activation and dysfunction are hallmarks of inflammation. Neutrophil-vascular endothelium interactions have significant effects on vascular wall physiology and pathology. Myeloperoxidase (MPO)-derived products released from activated neutrophils can mediate the inflammatory response and contribute to endothelial dysfunction. 2-Chlorofatty aldehyde (2-ClFALD) is the direct oxidation product of MPO-derived hypochlorous acid (HOCl) targeting plasmalogen phospholipids. The role of 2-ClFALD in endothelial dysfunction is poorly understood and may be dependent on the vascular bed. This study compared the role of 2-ClFALD in eliciting endothelial dysfunction in human coronary artery endothelial cells (HCAEC), human lung microvascular endothelial cells (HLMVEC), and human kidney endothelial cells (HKEC). Profound increases in selectin surface expression as well as ICAM-1 and VCAM-1 surface expression were observed in HCAEC and HLMVEC. The surface expression of these adherence molecules resulted in robust adherence of neutrophils and platelets to 2-ClFALD treated endothelial cells. In contrast to HCAEC and HLMVEC, 2-ClFALD-treated HKEC had substantially reduced adherence molecule surface expression with no resulting increase in platelet adherence. 2-ClFALD-treated HKEC did have an increase in neutrophil adherence. All three endothelial cell lines treated with 2-ClFALD displayed a time-dependent loss of barrier function. Further studies revealed 2-ClHDyA localizes to ER and Golgi when using a synthetic alkyne analog of 2-ClFALD in HCAEC and HLMVEC. These findings indicate 2-ClFALDs promote endothelial cell dysfunction with disparate degrees of responsiveness depending on the vascular bed of origin.
Collapse
Affiliation(s)
- Jane McHowat
- Department of Pathology, Saint Louis University School of Medicine, St. Louis, MO, United States.,Center for Cardiovascular Research, Saint Louis University School of Medicine, St. Louis, MO, United States
| | - Shubha Shakya
- Center for Cardiovascular Research, Saint Louis University School of Medicine, St. Louis, MO, United States.,Edward A. Doisy Department of Biochemistry and Molecular Biology, Saint Louis University School of Medicine, St. Louis, MO, United States
| | - David A Ford
- Center for Cardiovascular Research, Saint Louis University School of Medicine, St. Louis, MO, United States.,Edward A. Doisy Department of Biochemistry and Molecular Biology, Saint Louis University School of Medicine, St. Louis, MO, United States
| |
Collapse
|
32
|
Takeshima A, Shimogaki M, Kano T, Maruoka K. Development of Ketone-Based Brominating Agents (KBA) for the Practical Asymmetric α-Bromination of Aldehydes Catalyzed by Tritylpyrrolidine. ACS Catal 2020. [DOI: 10.1021/acscatal.0c01596] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Aika Takeshima
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo, Kyoto 606-8502, Japan
| | - Mio Shimogaki
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo, Kyoto 606-8502, Japan
| | - Taichi Kano
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo, Kyoto 606-8502, Japan
| | - Keiji Maruoka
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo, Kyoto 606-8502, Japan
- Graduate School of Pharmaceutical Sciences, Kyoto University, Sakyo, Kyoto 606-8501, Japan
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China
| |
Collapse
|
33
|
Development of Multi‐Catalytic Strategies Based on the Combination between Iron‐/Copper‐ and Organo‐Catalysis. Isr J Chem 2020. [DOI: 10.1002/ijch.202000018] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
|
34
|
Kortet S, Claraz A, Pihko PM. Catalytic Enantioselective Total Synthesis of (+)-Lycoperdic Acid. Org Lett 2020; 22:3010-3013. [PMID: 32216321 DOI: 10.1021/acs.orglett.0c00772] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A concise enantio- and stereocontrolled synthesis of (+)-lycoperdic acid is presented. The stereochemical control is based on iminium-catalyzed Mukaiyama-Michael reaction and enamine-catalyzed organocatalytic α-chlorination steps. The amino group was introduced by azide displacement, affording the final stereochemistry of (+)-lycoperdic acid. Penultimate hydrogenation and hydrolysis afforded pure (+)-lycoperdic acid in seven steps from a known silyloxyfuran.
Collapse
Affiliation(s)
- Sami Kortet
- Department of Chemistry and NanoScience Center, University of Jyväskylä, Survontie 9B, 40520 Jyväskylä, Finland
| | - Aurélie Claraz
- Department of Chemistry and NanoScience Center, University of Jyväskylä, Survontie 9B, 40520 Jyväskylä, Finland
| | - Petri M Pihko
- Department of Chemistry and NanoScience Center, University of Jyväskylä, Survontie 9B, 40520 Jyväskylä, Finland
| |
Collapse
|
35
|
Lowe RA, Taylor D, Chibale K, Nelson A, Marsden SP. Synthesis and evaluation of the performance of a small molecule library based on diverse tropane-related scaffolds. Bioorg Med Chem 2020; 28:115442. [PMID: 32209295 DOI: 10.1016/j.bmc.2020.115442] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2020] [Revised: 03/02/2020] [Accepted: 03/12/2020] [Indexed: 12/20/2022]
Abstract
A unified synthetic approach was developed that enabled the synthesis of diverse tropane-related scaffolds. The key intermediates that were exploited were cycloadducts formed by reaction between 3-hydroxy-pyridinium salts and vinyl sulfones or sulfonamides. The diverse tropane-related scaffolds were formed by addition of substituents to, cyclisation reactions of, and fusion of additional ring(s) to the key bicyclic intermediates. A set of 53 screening compounds was designed, synthesised and evaluated in order to determine the biological relevance of the scaffolds accessible using the synthetic approach. Two inhibitors of Hedgehog signalling, and four compounds with weak activity against the parasite P. falciparum, were discovered. Three of the active compounds may be considered to be indotropane or pyrrotropane pseudo natural products in which a tropane is fused with a fragment from another natural product class. It was concluded that the unified synthetic approach had yielded diverse scaffolds suitable for the design of performance-diverse screening libraries.
Collapse
Affiliation(s)
- Robert A Lowe
- Astbury Centre for Structural Molecular Biology, University of Leeds, Leeds LS2 9JT, UK; School of Chemistry, University of Leeds, Leeds LS2 9JT, UK
| | - Dale Taylor
- H3D Drug Discovery and Development Center, University of Cape Town, Private Bag, Rondebosch 7700, South Africa
| | - Kelly Chibale
- Department of Chemistry, University of Cape Town, Rondebosch 7701, South Africa; Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Rondebosch 7701, South Africa; South African Medical Research Council, Drug Discovery and Development Research Unit, University of Cape Town, Rondebosch 7701, South Africa
| | - Adam Nelson
- Astbury Centre for Structural Molecular Biology, University of Leeds, Leeds LS2 9JT, UK; School of Chemistry, University of Leeds, Leeds LS2 9JT, UK.
| | | |
Collapse
|
36
|
Affiliation(s)
- Manjula D. Rathnayake
- Department of Chemistry, Oklahoma State University, 107, Physical Science, Stillwater, Oklahoma 74078, United States
| | - Jimmie D. Weaver
- Department of Chemistry, Oklahoma State University, 107, Physical Science, Stillwater, Oklahoma 74078, United States
| |
Collapse
|
37
|
West MS, Mills LR, McDonald TR, Lee JB, Ensan D, Rousseaux SAL. Synthesis of trans-2-Substituted Cyclopropylamines from α-Chloroaldehydes. Org Lett 2019; 21:8409-8413. [PMID: 31591894 DOI: 10.1021/acs.orglett.9b03172] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Cyclopropylamines are prevalent in pharmaceuticals and agrochemicals. Herein, we report the synthesis of trans-2-substituted cyclopropylamines in high diastereoselectivity from readily available α-chloroaldehydes. The reaction proceeds via trapping of an electrophilic zinc homoenolate with an amine followed by ring closure to generate the cyclopropylamine. We have also observed that cyclopropylamine cis/trans-isomerization occurs in the presence of zinc halide salts and that this process can be turned off by the addition of a polar aprotic cosolvent.
Collapse
Affiliation(s)
- Michael S West
- Davenport Research Laboratories, Department of Chemistry , University of Toronto , 80 St. George Street , Toronto , Ontario M5S 3H6 , Canada
| | - L Reginald Mills
- Davenport Research Laboratories, Department of Chemistry , University of Toronto , 80 St. George Street , Toronto , Ontario M5S 3H6 , Canada
| | - Tyler R McDonald
- Davenport Research Laboratories, Department of Chemistry , University of Toronto , 80 St. George Street , Toronto , Ontario M5S 3H6 , Canada
| | - Jessica B Lee
- Davenport Research Laboratories, Department of Chemistry , University of Toronto , 80 St. George Street , Toronto , Ontario M5S 3H6 , Canada
| | - Deeba Ensan
- Davenport Research Laboratories, Department of Chemistry , University of Toronto , 80 St. George Street , Toronto , Ontario M5S 3H6 , Canada
| | - Sophie A L Rousseaux
- Davenport Research Laboratories, Department of Chemistry , University of Toronto , 80 St. George Street , Toronto , Ontario M5S 3H6 , Canada
| |
Collapse
|
38
|
Reed CW, Lindsley CW. A general, enantioselective synthesis of 2-substituted thiomorpholines and thiomorpholine 1,1-dioxides. Tetrahedron Lett 2019. [DOI: 10.1016/j.tetlet.2019.151104] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
|
39
|
Zuccarello G, Mayans JG, Escofet I, Scharnagel D, Kirillova MS, Pérez-Jimeno AH, Calleja P, Boothe JR, Echavarren AM. Enantioselective Folding of Enynes by Gold(I) Catalysts with a Remote C2-Chiral Element. J Am Chem Soc 2019; 141:11858-11863. [PMID: 31290658 DOI: 10.1021/jacs.9b06326] [Citation(s) in RCA: 52] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Chiral gold(I) catalysts have been designed based on a modified JohnPhos ligand with a distal C2-2,5-diarylpyrrolidine that creates a tight binding cavity. The C2-chiral element is close to where the C-C bond formation takes place in cyclizations of 1,6-enynes. These chiral mononuclear catalysts have been applied for the enantioselective 5-exo-dig and 6-endo-dig cyclization of different 1,6-enynes as well as in the first enantioselective total synthesis of three members of the carexane family of natural products. Opposite enantioselectivities have been achieved in seemingly analogous reactions of 1,6-enynes, which result from different chiral folding of the substrates based on attractive aryl-aryl interactions.
Collapse
Affiliation(s)
- Giuseppe Zuccarello
- Institute of Chemical Research of Catalonia (ICIQ) , Barcelona Institute of Science and Technology , Av. Països Catalans 16 , 43007 Tarragona , Spain.,Departament de Química Orgànica i Analítica , Universitat Rovira i Virgili , C/Marcel·lí Domingo s/n , 43007 Tarragona , Spain
| | - Joan G Mayans
- Institute of Chemical Research of Catalonia (ICIQ) , Barcelona Institute of Science and Technology , Av. Països Catalans 16 , 43007 Tarragona , Spain.,Departament de Química Orgànica i Analítica , Universitat Rovira i Virgili , C/Marcel·lí Domingo s/n , 43007 Tarragona , Spain
| | - Imma Escofet
- Institute of Chemical Research of Catalonia (ICIQ) , Barcelona Institute of Science and Technology , Av. Països Catalans 16 , 43007 Tarragona , Spain.,Departament de Química Orgànica i Analítica , Universitat Rovira i Virgili , C/Marcel·lí Domingo s/n , 43007 Tarragona , Spain
| | - Dagmar Scharnagel
- Institute of Chemical Research of Catalonia (ICIQ) , Barcelona Institute of Science and Technology , Av. Països Catalans 16 , 43007 Tarragona , Spain
| | - Mariia S Kirillova
- Institute of Chemical Research of Catalonia (ICIQ) , Barcelona Institute of Science and Technology , Av. Països Catalans 16 , 43007 Tarragona , Spain
| | - Alba H Pérez-Jimeno
- Institute of Chemical Research of Catalonia (ICIQ) , Barcelona Institute of Science and Technology , Av. Països Catalans 16 , 43007 Tarragona , Spain.,Departament de Química Orgànica i Analítica , Universitat Rovira i Virgili , C/Marcel·lí Domingo s/n , 43007 Tarragona , Spain
| | - Pilar Calleja
- Institute of Chemical Research of Catalonia (ICIQ) , Barcelona Institute of Science and Technology , Av. Països Catalans 16 , 43007 Tarragona , Spain
| | - Jordan R Boothe
- Institute of Chemical Research of Catalonia (ICIQ) , Barcelona Institute of Science and Technology , Av. Països Catalans 16 , 43007 Tarragona , Spain
| | - Antonio M Echavarren
- Institute of Chemical Research of Catalonia (ICIQ) , Barcelona Institute of Science and Technology , Av. Països Catalans 16 , 43007 Tarragona , Spain.,Departament de Química Orgànica i Analítica , Universitat Rovira i Virgili , C/Marcel·lí Domingo s/n , 43007 Tarragona , Spain
| |
Collapse
|
40
|
Sandmeier T, Goetzke FW, Krautwald S, Carreira EM. Iridium-Catalyzed Enantioselective Allylic Substitution with Aqueous Solutions of Nucleophiles. J Am Chem Soc 2019; 141:12212-12218. [DOI: 10.1021/jacs.9b05830] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Tobias Sandmeier
- ETH Zürich, Vladimir-Prelog-Weg 3, HCI, 8093 Zürich, Switzerland
| | | | - Simon Krautwald
- ETH Zürich, Vladimir-Prelog-Weg 3, HCI, 8093 Zürich, Switzerland
| | | |
Collapse
|
41
|
Bourboula A, Limnios D, Kokotou MG, Mountanea OG, Kokotos G. Enantioselective Organocatalysis-Based Synthesis of 3-Hydroxy Fatty Acids and Fatty γ-Lactones. Molecules 2019; 24:molecules24112081. [PMID: 31159242 PMCID: PMC6600402 DOI: 10.3390/molecules24112081] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2019] [Revised: 05/27/2019] [Accepted: 05/27/2019] [Indexed: 02/03/2023] Open
Abstract
3-Hydroxy fatty acids have attracted the interest of researchers, since some of them may interact with free fatty acid receptors more effectively than their non-hydroxylated counterparts and their determination in plasma provides diagnostic information regarding mitochondrial deficiency. We present here the development of a convenient and general methodology for the asymmetric synthesis of 3-hydroxy fatty acids. The enantioselective organocatalytic synthesis of terminal epoxides, starting from long chain aldehydes, is the key-step of our methodology, followed by ring opening with vinylmagnesium bromide. Ozonolysis and subsequent oxidation leads to the target products. MacMillan’s third generation imidazolidinone organocatalyst has been employed for the epoxide formation, ensuring products in high enantiomeric purity. Furthermore, a route for the incorporation of deuterium on the carbon atom carrying the hydroxy group was developed allowing the synthesis of deuterated derivatives, which may be useful in biological studies and in mass spectrometry studies. In addition, the synthesis of fatty γ-lactones, corresponding to 4-hydroxy fatty acids, was also explored.
Collapse
Affiliation(s)
- Asimina Bourboula
- Department of Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis, Athens 15771, Greece.
| | - Dimitris Limnios
- Department of Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis, Athens 15771, Greece.
| | - Maroula G Kokotou
- Department of Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis, Athens 15771, Greece.
| | - Olga G Mountanea
- Department of Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis, Athens 15771, Greece.
| | - George Kokotos
- Department of Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis, Athens 15771, Greece.
| |
Collapse
|
42
|
Tsutsumi T, Karanjit S, Nakayama A, Namba K. A Concise Asymmetric Total Synthesis of (+)-Epilupinine. Org Lett 2019; 21:2620-2624. [PMID: 30963767 DOI: 10.1021/acs.orglett.9b00607] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Asymmetric total synthesis of (+)-epilupinine was achieved in just three steps using only commercially available common reagents. The total synthesis involved alkylations of N-nosylamide, ozone oxidation, and sequential reactions of the removal of the nosyl group, intramolecular dehydrative condensation, intramolecular Mannich reaction catalyzed by l-proline, and a reduction.
Collapse
Affiliation(s)
- Tomohiro Tsutsumi
- Graduate School of Pharmaceutical Science and Research Cluster on "Innovative Chemical Sensing" , Tokushima University , 1-78-1 Shomachi , Tokushima 770-8505 , Japan
| | - Sangita Karanjit
- Graduate School of Pharmaceutical Science and Research Cluster on "Innovative Chemical Sensing" , Tokushima University , 1-78-1 Shomachi , Tokushima 770-8505 , Japan
| | - Atsushi Nakayama
- Graduate School of Pharmaceutical Science and Research Cluster on "Innovative Chemical Sensing" , Tokushima University , 1-78-1 Shomachi , Tokushima 770-8505 , Japan
| | - Kosuke Namba
- Graduate School of Pharmaceutical Science and Research Cluster on "Innovative Chemical Sensing" , Tokushima University , 1-78-1 Shomachi , Tokushima 770-8505 , Japan
| |
Collapse
|
43
|
Synergistic catalysis for cascade allylation and 2-aza-cope rearrangement of azomethine ylides. Nat Commun 2019; 10:1594. [PMID: 30962429 PMCID: PMC6453969 DOI: 10.1038/s41467-019-09563-6] [Citation(s) in RCA: 55] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Accepted: 03/15/2019] [Indexed: 11/28/2022] Open
Abstract
The efficient construction of enantiomerically enriched molecules from simple starting materials via catalytic asymmetric synthesis strategies is a key challenge in synthetic chemistry. Metallated azomethine ylides are commonly-used synthons for the preparation of N-heterocycles and α-amino acids. Remarkably, to date, the utilization of azomethine ylides for the facile access to chiral amines has proven elusive. Here, we report that a synergistic Cu/Ir-catalytic system combined with careful tuning of the steric congestion can be used to convert aldimine esters to a variety of chiral homoallylic amines via a cascade allylation/2-aza-Cope rearrangement. The elucidation of the distinct effects of each stereogenic center of the allylation intermediates on the stereochemical outcome and chirality transfer in the rearrangement further guided the selection of catalysts combination. Metallated azomethine ylides are commonly used for the construction of N-heterocycles and α-amino acids. Here, the authors report a synergistic Cu/Ir-catalytic system that converts aldimine esters to a variety of chiral homoallylic amines via a cascade allylation/2-aza-Cope rearrangement.
Collapse
|
44
|
Mountanea OG, Limnios D, Kokotou MG, Bourboula A, Kokotos G. Asymmetric Synthesis of Saturated Hydroxy Fatty Acids and Fatty Acid Esters of Hydroxy Fatty Acids. European J Org Chem 2019. [DOI: 10.1002/ejoc.201801881] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Olga G. Mountanea
- Laboratory of Organic Chemistry; Department of Chemistry; National and Kapodistrian University of Athens; Panepistimiopolis Athens 15771 Greece
| | - Dimitris Limnios
- Laboratory of Organic Chemistry; Department of Chemistry; National and Kapodistrian University of Athens; Panepistimiopolis Athens 15771 Greece
| | - Maroula G. Kokotou
- Laboratory of Organic Chemistry; Department of Chemistry; National and Kapodistrian University of Athens; Panepistimiopolis Athens 15771 Greece
| | - Asimina Bourboula
- Laboratory of Organic Chemistry; Department of Chemistry; National and Kapodistrian University of Athens; Panepistimiopolis Athens 15771 Greece
| | - George Kokotos
- Laboratory of Organic Chemistry; Department of Chemistry; National and Kapodistrian University of Athens; Panepistimiopolis Athens 15771 Greece
| |
Collapse
|
45
|
Affiliation(s)
- L. Reginald Mills
- Davenport Research Laboratories; Department of Chemistry; University of Toronto; 80 St George Street M5S 3H6 Toronto, Ontario Canada
| | - Sophie A. L. Rousseaux
- Davenport Research Laboratories; Department of Chemistry; University of Toronto; 80 St George Street M5S 3H6 Toronto, Ontario Canada
| |
Collapse
|
46
|
Quintard A, Sperandio C, Rodriguez J. Modular Enantioselective Synthesis of an Advanced Pentahydroxy Intermediate of Antimalarial Bastimolide A and of Fluorinated and Chlorinated Analogues. Org Lett 2018; 20:5274-5277. [PMID: 30129767 DOI: 10.1021/acs.orglett.8b02213] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
A short enantioselective catalytic synthesis of the key C15-C27 fragment of bastimolide A, a natural product showing promising antimalarial bioactivity, is disclosed. The strategic insertion of halogen atoms such as fluorine and chlorine by enantioselective organocatalytic halogenations allowed an excellent stereochemical control for the formation of complex acyclic fragments bearing up to four stereogenic centers. Furthermore, besides the formation of the 1,5,7,9,13-pentahydroxy fragment of the natural product, this strategy opens the route to the modulation of the bioactivity by halogenohydrins.
Collapse
Affiliation(s)
- Adrien Quintard
- Aix Marseille Univ , CNRS, Centrale Marseille, iSm2 , Marseille , France
| | - Céline Sperandio
- Aix Marseille Univ , CNRS, Centrale Marseille, iSm2 , Marseille , France
| | - Jean Rodriguez
- Aix Marseille Univ , CNRS, Centrale Marseille, iSm2 , Marseille , France
| |
Collapse
|
47
|
|
48
|
Ponath S, Menger M, Grothues L, Weber M, Lentz D, Strohmann C, Christmann M. Mechanistic Studies on the Organocatalytic α-Chlorination of Aldehydes: The Role and Nature of Off-Cycle Intermediates. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201806261] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Sebastian Ponath
- Freie Universität Berlin; Institute of Chemistry and Biochemistry; Takustr. 3 14195 Berlin Germany
| | - Martina Menger
- Freie Universität Berlin; Institute of Chemistry and Biochemistry; Takustr. 3 14195 Berlin Germany
| | - Lydia Grothues
- Freie Universität Berlin; Institute of Chemistry and Biochemistry; Takustr. 3 14195 Berlin Germany
| | - Manuela Weber
- Freie Universität Berlin; Institute of Chemistry and Biochemistry; Takustr. 3 14195 Berlin Germany
| | - Dieter Lentz
- Freie Universität Berlin; Institute of Chemistry and Biochemistry; Takustr. 3 14195 Berlin Germany
| | - Carsten Strohmann
- Technische Universität Dortmund; Faculty of Chemistry and Chemical Biology; Otto-Hahn-Str. 6 44227 Dortmund Germany
| | - Mathias Christmann
- Freie Universität Berlin; Institute of Chemistry and Biochemistry; Takustr. 3 14195 Berlin Germany
| |
Collapse
|
49
|
Ponath S, Menger M, Grothues L, Weber M, Lentz D, Strohmann C, Christmann M. Mechanistic Studies on the Organocatalytic α-Chlorination of Aldehydes: The Role and Nature of Off-Cycle Intermediates. Angew Chem Int Ed Engl 2018; 57:11683-11687. [PMID: 29999220 DOI: 10.1002/anie.201806261] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2018] [Indexed: 01/22/2023]
Abstract
Herein we report the isolation and characterization of aminal intermediates in the organocatalytic α-chlorination of aldehydes. These species are stable covalent ternary adducts of the substrate, the catalyst and the chlorinating reagent. NMR-assisted kinetic studies and isotopic labeling experiments with the isolated intermediate did not support its involvement in downstream stereoselective processes as proposed by Blackmond. By tuning the reactivity of the chlorinating reagent, we were able to suppress the accumulation of rate-limiting off-cycle intermediates. As a result, an efficient and highly enantioselective catalytic system with a broad functional group tolerance was developed.
Collapse
Affiliation(s)
- Sebastian Ponath
- Freie Universität Berlin, Institute of Chemistry and Biochemistry, Takustr. 3, 14195, Berlin, Germany
| | - Martina Menger
- Freie Universität Berlin, Institute of Chemistry and Biochemistry, Takustr. 3, 14195, Berlin, Germany
| | - Lydia Grothues
- Freie Universität Berlin, Institute of Chemistry and Biochemistry, Takustr. 3, 14195, Berlin, Germany
| | - Manuela Weber
- Freie Universität Berlin, Institute of Chemistry and Biochemistry, Takustr. 3, 14195, Berlin, Germany
| | - Dieter Lentz
- Freie Universität Berlin, Institute of Chemistry and Biochemistry, Takustr. 3, 14195, Berlin, Germany
| | - Carsten Strohmann
- Technische Universität Dortmund, Faculty of Chemistry and Chemical Biology, Otto-Hahn-Str. 6, 44227, Dortmund, Germany
| | - Mathias Christmann
- Freie Universität Berlin, Institute of Chemistry and Biochemistry, Takustr. 3, 14195, Berlin, Germany
| |
Collapse
|
50
|
Khanal HD, Thombal RS, Maezono SMB, Lee YR. Designs and Strategies for the Halo-Functionalization of Diazo Compounds. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201800340] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Hari Datta Khanal
- School of Chemical Engineering; Yeungnam University; Gyeongsan 712-749 Republic of Korea
| | - Raju S. Thombal
- School of Chemical Engineering; Yeungnam University; Gyeongsan 712-749 Republic of Korea
| | - Shizuka Mei B. Maezono
- School of Chemical Engineering; Yeungnam University; Gyeongsan 712-749 Republic of Korea
| | - Yong Rok Lee
- School of Chemical Engineering; Yeungnam University; Gyeongsan 712-749 Republic of Korea
| |
Collapse
|