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Zhu XL, Luo YQ, Wang L, Huang YK, He YG, Xie WJ, Liu SL, Shi XX. Novel Stereoselective Syntheses of (+)-Streptol and (-)-1 -epi-Streptol Starting from Naturally Abundant (-)-Shikimic Acid. ACS OMEGA 2021; 6:17103-17112. [PMID: 34250367 PMCID: PMC8264934 DOI: 10.1021/acsomega.1c02502] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Accepted: 06/14/2021] [Indexed: 06/13/2023]
Abstract
Novel highly stereoselective syntheses of (+)-streptol and (-)-1-epi-streptol starting from naturally abundant (-)-shikimic acid were described in this article. (-)-Shikimic acid was first converted to the common key intermediate by 11 steps in 40% yield. It was then converted to (+)-streptol by three steps in 72% yield, and it was also converted to (-)-1-epi-streptol by one step in 90% yield. In summary, (+)-streptol and (-)-1-epi-streptol were synthesized from (-)-shikimic acid by 14 and 12 steps in 29 and 36% overall yields, respectively.
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Affiliation(s)
- Xing-Liang Zhu
- Engineering
Research Center of Pharmaceutical Process Chemistry of the Ministry
of Education, School of Pharmacy, East China
University of Science and Technology, 130 Mei-Long Road, Shanghai 200237, P. R. China
| | - Yong-Qiang Luo
- Engineering
Research Center of Pharmaceutical Process Chemistry of the Ministry
of Education, School of Pharmacy, East China
University of Science and Technology, 130 Mei-Long Road, Shanghai 200237, P. R. China
| | - Lei Wang
- Engineering
Research Center of Pharmaceutical Process Chemistry of the Ministry
of Education, School of Pharmacy, East China
University of Science and Technology, 130 Mei-Long Road, Shanghai 200237, P. R. China
| | - Yong-Kang Huang
- Engineering
Research Center of Pharmaceutical Process Chemistry of the Ministry
of Education, School of Pharmacy, East China
University of Science and Technology, 130 Mei-Long Road, Shanghai 200237, P. R. China
| | - Yun-Gang He
- Engineering
Research Center of Pharmaceutical Process Chemistry of the Ministry
of Education, School of Pharmacy, East China
University of Science and Technology, 130 Mei-Long Road, Shanghai 200237, P. R. China
| | - Wen-Jing Xie
- Engineering
Research Center of Pharmaceutical Process Chemistry of the Ministry
of Education, School of Pharmacy, East China
University of Science and Technology, 130 Mei-Long Road, Shanghai 200237, P. R. China
| | - Shi-Ling Liu
- Zhejiang
Arthur Pharmaceutical Co. Ltd., 3556 Linggongtang Road, Jiake Life Science Park Building 3, Daqiao Town, Nanhu District, Jiaxing, Zhejiang 314000, P. R. China
| | - Xiao-Xin Shi
- Engineering
Research Center of Pharmaceutical Process Chemistry of the Ministry
of Education, School of Pharmacy, East China
University of Science and Technology, 130 Mei-Long Road, Shanghai 200237, P. R. China
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2
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Hubbell AK, Coates GW. Nucleophilic Transformations of Lewis Acid-Activated Disubstituted Epoxides with Catalyst-Controlled Regioselectivity. J Org Chem 2020; 85:13391-13414. [PMID: 33076663 DOI: 10.1021/acs.joc.0c01691] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Due to their inherent ring strain and electrophilicity, epoxides are highly attractive building blocks for fundamental organic reactions. However, controlling the regioselectivity of disubstituted epoxide transformations is often particularly challenging. Most Lewis acid-mediated processes take advantage of intrinsic steric or electronic substrate bias to influence the site of nucleophilic attack. Therefore, the scope of many of these systems is frequently quite limited. Recent efforts to generate catalysts that can overcome substrate bias have expanded the synthetic utility of these well-known reactions. In this Perspective, we highlight various regioselective transformations of disubstituted epoxides, emphasizing those that have inspired the production of challenging, catalyst-controlled processes.
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Affiliation(s)
- Aran K Hubbell
- Department of Chemistry and Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853-1301, United States
| | - Geoffrey W Coates
- Department of Chemistry and Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853-1301, United States
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3
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Li Y, Wu Z, Ling Z, Chen H, Zhang W. Mechanistic study of the solvent-controlled Pd(ii)-catalyzed chemoselective intermolecular 1,2-aminooxygenation and 1,2-oxyamination of conjugated dienes. Org Chem Front 2019. [DOI: 10.1039/c8qo01288a] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The different coordination modes in MeCN and DMSO solvents could clarify the origin of chemoselectivity.
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Affiliation(s)
- Yunyi Li
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs
- School of Chemistry and Chemical Engineering
- Shanghai Jiao Tong University
- Shanghai 200240
- P.R. China
| | - Zhengxing Wu
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs
- School of Chemistry and Chemical Engineering
- Shanghai Jiao Tong University
- Shanghai 200240
- P.R. China
| | - Zheng Ling
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs
- School of Chemistry and Chemical Engineering
- Shanghai Jiao Tong University
- Shanghai 200240
- P.R. China
| | - Hongjin Chen
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs
- School of Chemistry and Chemical Engineering
- Shanghai Jiao Tong University
- Shanghai 200240
- P.R. China
| | - Wanbin Zhang
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs
- School of Chemistry and Chemical Engineering
- Shanghai Jiao Tong University
- Shanghai 200240
- P.R. China
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4
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Wen K, Wu Z, Chen B, Chen J, Zhang W. Pd(ii)-Catalyzed aerobic 1,2-difunctionalization of conjugated dienes: efficient synthesis of morpholines and 2-morpholones. Org Biomol Chem 2018; 16:5618-5625. [PMID: 30027979 DOI: 10.1039/c8ob01291a] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel and efficient methodology concerning the Pd(ii)-catalyzed intermolecular difunctionalization of conjugated dienes is reported to synthesize a series of functionalized morpholines and 2-morpholones. Widely distributed and easily obtained β-amino alcohols and α-amino acids, as starting nitrogen and oxygen sources, are successfully applied in the difunctionalization of conjugated dienes respectively. The majority of the desired products were obtained in moderate to excellent yields. Oxygen was successfully employed as a terminal oxidant. Further transformation of the generated products allowed for the expansion of structural diversity.
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Affiliation(s)
- Ke Wen
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, P.R. China.
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5
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Synthetic approach to seco-tetracenomycin natural products saccharothrixone A–C. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2018.04.031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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6
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Synthesis of Natural O-Linked Carba-Disaccharides, (+)- and (-)-Pericosine E, and Their Analogues as α-Glucosidase Inhibitors. Mar Drugs 2017; 15:md15010022. [PMID: 28124983 PMCID: PMC5295242 DOI: 10.3390/md15010022] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2016] [Revised: 01/12/2017] [Accepted: 01/16/2017] [Indexed: 12/04/2022] Open
Abstract
Pericosine E (6), a metabolite of Periconia byssoides OUPS-N133 was originally isolated from the sea hare Aplysia kurodai, which exists as an enantiomeric mixture in nature. The enantiospecific syntheses of both enantiomers of Periconia byssoides OUPS-N133 has been achieved, along with six stereoisomers, using a common simple synthetic strategy. For these efficient syntheses, highly regio- and steroselective processes for the preparation of bromohydrin and anti-epoxide intermediates were applied. In order to access the unique O-linked carbadisaccharide structure, coupling of chlorohydrin as a donor and anti-epoxide as an acceptor was achieved using catalytic BF3·Et2O. Most of the synthesized compounds exhibited selectively significant inhibitory activity against α-glycosidase derived from yeast. The strongest analog showed almost 50 times the activity of the positive control, deoxynojirimycin.
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7
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Mondal S, Sureshan KM. Carbasugar Synthesis via Vinylogous Ketal: Total Syntheses of (+)-MK7607, (-)-MK7607, (-)-Gabosine A, (-)-Epoxydine B, (-)-Epoxydine C, epi-(+)-Gabosine E and epi-(+)-MK7607. J Org Chem 2016; 81:11635-11645. [PMID: 27808513 DOI: 10.1021/acs.joc.6b01876] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Carbasugars, the carbocyclic analogues of sugars, constitute an important class of natural products with more than 140 members known and have attracted much attention due to their diverse biological activities like anticancer, antibacterial, herbicidal, and various enzyme inhibitory activities. As many carbohydrates are involved in various cellular signaling pathways, there is great interest in synthesis and biological exploration of carbasugars. Herein, we have developed a methodology to install an α,β-unsaturated aldehyde functionality on different inositols and derivatives by vinylogous elimination of the O-protecting group under mildly acidic condition. We have illustrated the versatility and utility of our methodology by the total syntheses of seven carbasugars viz. (-)-MK7607, (-)-gabosine A, (-)-epoxydine B, (-)-epoxydine C, (+)-MK7607, 1-epi-(+)-MK7607 and 1-epi-(+)-gabosine E.
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Affiliation(s)
- Soumik Mondal
- Indian Institute of Science Education and Research , Thiruvananthapuram, Kerala 695016, India
| | - Kana M Sureshan
- Indian Institute of Science Education and Research , Thiruvananthapuram, Kerala 695016, India
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8
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Funken N, Zhang YQ, Gansäuer A. Regiodivergent Catalysis: A Powerful Tool for Selective Catalysis. Chemistry 2016; 23:19-32. [DOI: 10.1002/chem.201603993] [Citation(s) in RCA: 79] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2016] [Indexed: 01/04/2023]
Affiliation(s)
- Nico Funken
- Kekulé-Institut für Organische Chemie und Biochemie; Universität Bonn; Gerhard-Domagk-Str. 1 53121 Bonn Germany
| | - Yong-Qiang Zhang
- Kekulé-Institut für Organische Chemie und Biochemie; Universität Bonn; Gerhard-Domagk-Str. 1 53121 Bonn Germany
| | - Andreas Gansäuer
- Kekulé-Institut für Organische Chemie und Biochemie; Universität Bonn; Gerhard-Domagk-Str. 1 53121 Bonn Germany
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9
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Racys DT, Eastoe J, Norrby PO, Grillo I, Rogers SE, Lloyd-Jones GC. Pd- η3 -C 6H 9 complexes of the Trost modular ligand: high nuclearity columnar aggregation controlled by concentration, solvent and counterion. Chem Sci 2015; 6:5793-5801. [PMID: 28791087 PMCID: PMC5520773 DOI: 10.1039/c5sc01181g] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2015] [Accepted: 06/12/2015] [Indexed: 11/21/2022] Open
Abstract
Under optimised conditions, the Trost modular ligand (TML) series induces high levels of asymmetric induction in an extraordinarily wide range of reactions involving palladium π-allyl intermediates. Prior mechanistic investigations into reactions involving Pd-η3-C6H9 intermediates have focussed on the monomeric 13-membered ring formed via P,P-chelation of the ligand to Pd. However, it is also recognised that ring-opening oligomerisation provides a pool of high nuclearity Pd-η3-C6H9 species that, by affording a low level, or even the opposite sense, of asymmetric induction relative to the mononuclear species, are responsible for a reduction in selectivity under non-optimised conditions. Herein we describe an investigation by NMR spectroscopy, molecular mechanics, molecular dynamics, and small-angle neutron scattering (SANS), of a Pd-η3-C6H9 cation bearing the 1,2-diaminocyclohexane TML ligand (2). Using both nondeuterated and perdeuterated (D47) isotopologues of the resulting complexes ([1]+), we show that a two-stage oligomerisation-aggregation process forms self assembled cylindrical aggregates of very high nuclearity (up to 56 Pd centres). We also investigate how concentration, solvent and counter-anion all modulate the extent of oligomerisation.
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Affiliation(s)
- Daugirdas Tomas Racys
- School of Chemistry , University of Bristol , Office S314, Cantock's Close , Clifton , Bristol BS8 1TS , UK .
| | - Julian Eastoe
- School of Chemistry , University of Bristol , Office S314, Cantock's Close , Clifton , Bristol BS8 1TS , UK .
| | - Per-Ola Norrby
- AstraZeneca Pharmaceutical Development , Global Medicines Development , Pepparedsleden 1 , SE-431 83 Mölndal , Sweden .
- Department of Chemistry and Molecular Biology , University of Gothenburg , Kemigården 4, #8076 , SE-412 96 Göteborg , Sweden
| | | | - Sarah E Rogers
- ISIS-STFC , Rutherford Appleton Laboratory , Chilton , Oxon OX11 0QX , UK .
| | - Guy C Lloyd-Jones
- School of Chemistry , University of Edinburgh , Joseph Black Building, West Mains Road , Edinburgh , Scotland EH9 3JJ , UK .
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Vaccarello DN, Moschitto MJ, Lewis CA. Regiodivergent addition of phenols to allylic oxides. J Org Chem 2015; 80:5252-9. [PMID: 25933102 DOI: 10.1021/acs.joc.5b00671] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The regiodivergent addition of substituted phenols to allylic oxides has been demonstrated using C2-symmetric palladium complexes. Complex phenol donors tyrosine, estradiol, and griseofulvin follow the predictive model.
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Affiliation(s)
- David N Vaccarello
- Department of Chemistry and Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853, United States
| | - Matthew J Moschitto
- Department of Chemistry and Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853, United States
| | - Chad A Lewis
- Department of Chemistry and Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853, United States
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