1
|
Hu JL, Bauer F, Breit B. Ruthenium-Catalyzed Enantioselective Addition of Carboxylic Acids to Allenes. ACS Catal 2021. [DOI: 10.1021/acscatal.1c03306] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Jiang-Lin Hu
- Institut für Organische Chemie, Albert-Ludwigs-Universität 21, 79104 Freiburg, Germany
| | - Felix Bauer
- Institut für Organische Chemie, Albert-Ludwigs-Universität 21, 79104 Freiburg, Germany
| | - Bernhard Breit
- Institut für Organische Chemie, Albert-Ludwigs-Universität 21, 79104 Freiburg, Germany
| |
Collapse
|
2
|
Luo G, Liu Y, Ding N, Li X, Zhao Z. Metal-Free C-H Functionalization of Allenamides: An Access to Branched Allylic Esters. ACS OMEGA 2019; 4:15312-15322. [PMID: 31552378 PMCID: PMC6751998 DOI: 10.1021/acsomega.9b02712] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/22/2019] [Accepted: 08/29/2019] [Indexed: 06/10/2023]
Abstract
A regioselective acyloxylation with carboxylic acids at the proximal carbon of allenamides by an N-iodosuccinimide-mediated C-H functionalization is reported. The reaction proceeds rapidly, is scalable to a gram scale, and displays a broad substrate scope, providing an efficient and practical protocol for the synthesis of branched allylic esters. Notably, protected amino acids were tolerated under the reaction conditions and afforded allylic amino acid esters in moderate yields.
Collapse
|
3
|
Chen R, Chen J, Zhang J, Wan X. Combination of Tetrabutylammonium Iodide (TBAI) withtert-Butyl Hydroperoxide (TBHP): An Efficient Transition-Metal-Free System to Construct Various Chemical Bonds. CHEM REC 2018. [DOI: 10.1002/tcr.201700069] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Rongxiang Chen
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science; Soochow University; Suzhou 215123 P. R. China. Fax: (+86) 512-6588-0334
| | - Jijun Chen
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science; Soochow University; Suzhou 215123 P. R. China. Fax: (+86) 512-6588-0334
| | - Jie Zhang
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science; Soochow University; Suzhou 215123 P. R. China. Fax: (+86) 512-6588-0334
| | - Xiaobing Wan
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science; Soochow University; Suzhou 215123 P. R. China. Fax: (+86) 512-6588-0334
| |
Collapse
|
4
|
Lu B, Zhu F, Wang D, Sun H, Shen Q. Iron-catalyzed esterification of allylic sp 3 C–H bonds with carboxylic acids: Facile access to allylic esters. Tetrahedron Lett 2017. [DOI: 10.1016/j.tetlet.2017.05.039] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
|
5
|
Prota AE, Bargsten K, Redondo-Horcajo M, Smith AB, Yang CPH, McDaid HM, Paterson I, Horwitz SB, Fernando Díaz J, Steinmetz MO. Structural Basis of Microtubule Stabilization by Discodermolide. Chembiochem 2017; 18:905-909. [PMID: 28207984 DOI: 10.1002/cbic.201600696] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2016] [Indexed: 11/12/2022]
Abstract
Microtubule-stabilizing agents (MSAs) are widely used in chemotherapy. Using X-ray crystallography we elucidated the detailed binding modes of two potent MSAs, (+)-discodermolide (DDM) and the DDM-paclitaxel hybrid KS-1-199-32, in the taxane pocket of β-tubulin. The two compounds bind in a very similar hairpin conformation, as previously observed in solution. However, they stabilize the M-loop of β-tubulin differently: KS-1-199-32 induces an M-loop helical conformation that is not observed for DDM. In the context of the microtubule structure, both MSAs connect the β-tubulin helices H6 and H7 and loop S9-S10 with the M-loop. This is similar to the structural effects elicited by epothilone A, but distinct from paclitaxel. Together, our data reveal differential binding mechanisms of DDM and KS-1-199-32 on tubulin.
Collapse
Affiliation(s)
- Andrea E Prota
- Laboratory of Biomolecular Research, Department of Biology and Chemistry, Paul Scherrer Institut, OFLC/111, 5232, Villigen PSI, Switzerland
| | - Katja Bargsten
- Laboratory of Biomolecular Research, Department of Biology and Chemistry, Paul Scherrer Institut, OFLC/111, 5232, Villigen PSI, Switzerland.,Current address: Department of Biochemistry, University of Zürich, Winterthurerstrasse 190, 8057, Zürich, Switzerland
| | - Mariano Redondo-Horcajo
- Chemical and Physical Biology, Centro de Investigaciones Biológicas, Consejo Superior de Investigaciones Científicas CIB-CSIC, Ramiro de Maeztu 9, 28040, Madrid, Spain
| | - Amos B Smith
- Department of Chemistry, University of Pennsylvania, 231 S. 34th Street, Philadelphia, PA, 19104, USA
| | - Chia-Ping H Yang
- Department of Molecular Pharmacology, Albert Einstein College of Medicine, 1300 Morris Park Avenue, Golding 201, Bronx, NY, 1046, USA
| | - Hayley M McDaid
- Department of Molecular Pharmacology, Albert Einstein College of Medicine, 1300 Morris Park Avenue, Golding 201, Bronx, NY, 1046, USA
| | - Ian Paterson
- University Chemical Laboratory, Cambridge University, Lensfield Road, Cambridge, CB2 1EW, UK
| | - Susan B Horwitz
- Department of Molecular Pharmacology, Albert Einstein College of Medicine, 1300 Morris Park Avenue, Golding 201, Bronx, NY, 1046, USA
| | - José Fernando Díaz
- Chemical and Physical Biology, Centro de Investigaciones Biológicas, Consejo Superior de Investigaciones Científicas CIB-CSIC, Ramiro de Maeztu 9, 28040, Madrid, Spain
| | - Michel O Steinmetz
- Laboratory of Biomolecular Research, Department of Biology and Chemistry, Paul Scherrer Institut, OFLC/111, 5232, Villigen PSI, Switzerland
| |
Collapse
|
6
|
Discodermolide. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/b978-0-08-100023-6.00003-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/18/2023]
|
7
|
Grimmer C, Moore TW, Padwa A, Prussia A, Wells G, Wu S, Sun A, Snyder JP. Antiviral atropisomers: conformational energy surfaces by NMR for host-directed myxovirus blockers. J Chem Inf Model 2014; 54:2214-23. [PMID: 25058809 DOI: 10.1021/ci500204j] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Biologically active organic molecules characterized by a high single bond torsional barrier generate isolable isomers (atropisomers) and offer a unique stereochemical component to the design of selective therapeutic agents. The present work presents a nanomolar active inhibitor of myxoviruses, which most likely acts by blocking one or more cellular host proteins but also, serendipitously, exhibits axial chirality with an energy barrier of ΔG((++)) ≥30 kcal/mol. The latter has been probed by variable temperature NMR and microwave irradiation and by high level DFT transition state analysis and force field calculations. Full conformational profiles of the corresponding (aR,S) and (aS,S) atropisomers at ambient temperature were derived by conformer deconvolution with NAMFIS (NMR Analysis by Molecular Flexibility In Solution) methodology to generate seven and eight individual conformations, each assigned a % population. An accurate evaluation of a key torsion angle at the center of the molecules associated with a (3)JC-S-C-H coupling constant was obtained by mapping the S-C bond rotation with the MPW1PW91/6-31G-d,p DFT method followed by fitting the resulting dihedral angles and J-values to a Karplus expression. Accordingly, we have developed a complete conformational profile of diastereomeric atropisomers consistent with both high and low rotational barriers. We expect this assessment to assist the rationalization of the selectivity of the two (aR,S) and (aS,S) forms against host proteins, while offering insights into their divergent toxicity behavior.
Collapse
Affiliation(s)
- Craig Grimmer
- School of Chemistry and Physics, University of KwaZulu-Natal , Pietermaritzburg, South Africa
| | | | | | | | | | | | | | | |
Collapse
|
8
|
Shi E, Shao Y, Chen S, Hu H, Liu Z, Zhang J, Wan X. Tetrabutylammonium Iodide Catalyzed Synthesis of Allylic Ester with tert-Butyl Hydroperoxide as an Oxidant. Org Lett 2012; 14:3384-7. [DOI: 10.1021/ol3013606] [Citation(s) in RCA: 180] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Erbo Shi
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China, Key Laboratory of Fine Petrochemical Engineering, Changzhou University, Changzhou 213164, P. R. China, and Key Laboratory for Chemistry of Low-Dimensional Materials, School of Chemistry and Chemical Engineering, Huaiyin Normal University, Huaian 223300, P. R. China
| | - Ying Shao
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China, Key Laboratory of Fine Petrochemical Engineering, Changzhou University, Changzhou 213164, P. R. China, and Key Laboratory for Chemistry of Low-Dimensional Materials, School of Chemistry and Chemical Engineering, Huaiyin Normal University, Huaian 223300, P. R. China
| | - Shulin Chen
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China, Key Laboratory of Fine Petrochemical Engineering, Changzhou University, Changzhou 213164, P. R. China, and Key Laboratory for Chemistry of Low-Dimensional Materials, School of Chemistry and Chemical Engineering, Huaiyin Normal University, Huaian 223300, P. R. China
| | - Huayou Hu
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China, Key Laboratory of Fine Petrochemical Engineering, Changzhou University, Changzhou 213164, P. R. China, and Key Laboratory for Chemistry of Low-Dimensional Materials, School of Chemistry and Chemical Engineering, Huaiyin Normal University, Huaian 223300, P. R. China
| | - Zhaojun Liu
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China, Key Laboratory of Fine Petrochemical Engineering, Changzhou University, Changzhou 213164, P. R. China, and Key Laboratory for Chemistry of Low-Dimensional Materials, School of Chemistry and Chemical Engineering, Huaiyin Normal University, Huaian 223300, P. R. China
| | - Jie Zhang
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China, Key Laboratory of Fine Petrochemical Engineering, Changzhou University, Changzhou 213164, P. R. China, and Key Laboratory for Chemistry of Low-Dimensional Materials, School of Chemistry and Chemical Engineering, Huaiyin Normal University, Huaian 223300, P. R. China
| | - Xiaobing Wan
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China, Key Laboratory of Fine Petrochemical Engineering, Changzhou University, Changzhou 213164, P. R. China, and Key Laboratory for Chemistry of Low-Dimensional Materials, School of Chemistry and Chemical Engineering, Huaiyin Normal University, Huaian 223300, P. R. China
| |
Collapse
|
9
|
Smith AB, Sugasawa K, Atasoylu O, Yang CPH, Horwitz SB. Design and synthesis of (+)-discodermolide-paclitaxel hybrids leading to enhanced biological activity. J Med Chem 2011; 54:6319-27. [PMID: 21870795 PMCID: PMC3174350 DOI: 10.1021/jm200692n] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Potential binding modes of (+)-discodermolide at the paclitaxel binding site of tubulin have been identified by computational studies based on earlier structural and SAR data. Examination of the prospective binding modes reveal that the aromatic pocket occupied by the paclitaxel side chain is unoccupied by (+)-discodermolide. Based on these findings, a small library of (+)-discodermolide-paclitaxel hybrids have been designed and synthesized. Biological evaluation reveals a two- to eight-fold increase in antiproliferative activity compared to the parent molecule using the A549 and MCF-7 cancer cell lines.
Collapse
Affiliation(s)
- Amos B. Smith
- Department of Chemistry, Monell Chemical Senses Center and Laboratory for Research on the Structure of Matter, University of Pennsylvania, Philadelphia, Pennsylvania 19104
| | - Keizo Sugasawa
- Department of Chemistry, Monell Chemical Senses Center and Laboratory for Research on the Structure of Matter, University of Pennsylvania, Philadelphia, Pennsylvania 19104
| | - Onur Atasoylu
- Department of Chemistry, Monell Chemical Senses Center and Laboratory for Research on the Structure of Matter, University of Pennsylvania, Philadelphia, Pennsylvania 19104
| | - Chia-Ping Huang Yang
- Department of Molecular Pharmacology, Albert Einstein College of Medicine, Bronx, NY 10461
| | - Susan Band Horwitz
- Department of Molecular Pharmacology, Albert Einstein College of Medicine, Bronx, NY 10461
| |
Collapse
|
10
|
de Lemos E, Agouridas E, Sorin G, Guerreiro A, Commerçon A, Pancrazi A, Betzer JF, Lannou MI, Ardisson J. Conception, Synthesis, and Biological Evaluation of Original Discodermolide Analogues. Chemistry 2011; 17:10123-34. [DOI: 10.1002/chem.201100675] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2011] [Indexed: 11/10/2022]
|
11
|
Qi J, Blanden AR, Bane S, Kingston DGI. Design, synthesis and biological evaluation of a simplified fluorescently labeled discodermolide as a molecular probe to study the binding of discodermolide to tubulin. Bioorg Med Chem 2011; 19:5247-54. [PMID: 21802957 DOI: 10.1016/j.bmc.2011.06.082] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2011] [Revised: 06/24/2011] [Accepted: 06/28/2011] [Indexed: 10/18/2022]
Abstract
The design, synthesis, and biological evaluation of a simplified fluorescently labeled discodermolide analogue possessing a dimethylaminobenzoyl fluorophore has been achieved. Stereoselective Suzuki coupling and Horner-Wadsworth-Emmons reaction comprised the key tactics for its construction. The analogue exhibited qualitatively similar activity to paclitaxel in a tubulin assembly assay, and it can thus be used as a fluorescent molecular probe to explore the local environment of the discodermolide binding site on tubulin. The results of fluorescence measurements on the tubulin-bound analogue are reported.
Collapse
Affiliation(s)
- Jun Qi
- Department of Chemistry, Virginia Tech, Blacksburg, VA 24061, USA
| | | | | | | |
Collapse
|
12
|
Wright AE. The Lithistida: important sources of compounds useful in biomedical research. Curr Opin Biotechnol 2011; 21:801-7. [PMID: 20971629 DOI: 10.1016/j.copbio.2010.09.012] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2010] [Revised: 09/06/2010] [Accepted: 09/17/2010] [Indexed: 10/18/2022]
Abstract
Lithistid sponges have been an important source of structurally complex natural products with potent biological activities. Examples of compounds marketed as biological markers along with recent advances in defining the modes of action and biomedical potential of lithistid-derived compounds are presented.
Collapse
Affiliation(s)
- Amy E Wright
- Harbor Branch Oceanographic Institute at Florida Atlantic University, Center for Marine Biomedical and Biotechnology Research, 5600 US 1 North, Fort Pierce, FL 34946, USA.
| |
Collapse
|
13
|
Jogalekar AS, Damodaran K, Kriel FH, Jung WH, Alcaraz AA, Zhong S, Curran DP, Snyder JP. Dictyostatin Flexibility Bridges Conformations in Solution and in the β-Tubulin Taxane Binding Site. J Am Chem Soc 2011; 133:2427-36. [DOI: 10.1021/ja1023817] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ashutosh S. Jogalekar
- Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta, Georgia 30322, United States
| | - Krishnan Damodaran
- Department of Chemistry, University of Pittsburgh, 1101 Chevron Science Center, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260-3900, United States
| | - Frederik H. Kriel
- Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta, Georgia 30322, United States
| | - Won-Hyuk Jung
- Department of Chemistry, University of Pittsburgh, 1101 Chevron Science Center, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260-3900, United States
| | - Ana A. Alcaraz
- Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta, Georgia 30322, United States
| | - Shi Zhong
- Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta, Georgia 30322, United States
| | - Dennis P. Curran
- Department of Chemistry, University of Pittsburgh, 1101 Chevron Science Center, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260-3900, United States
| | - James P. Snyder
- Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta, Georgia 30322, United States
| |
Collapse
|
14
|
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
|
15
|
Jogalekar AS. Conformations of stevastelin C3 analogs: Computational deconvolution of NMR data reveals conformational heterogeneity and novel motifs. Biopolymers 2010; 93:968-76. [DOI: 10.1002/bip.21504] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|