1
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Kobayakawa T, Tsuji K, Tamamura H. Design, synthesis and evaluation of bioactivity of peptidomimetics based on chloroalkene dipeptide isosteres. Bioorg Med Chem 2024; 110:117811. [PMID: 38959684 DOI: 10.1016/j.bmc.2024.117811] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2024] [Revised: 06/12/2024] [Accepted: 06/14/2024] [Indexed: 07/05/2024]
Abstract
Ample biologically active peptides have been found, identified and modified for use in drug discovery to date. However, several factors, such as low metabolic stability due to proteolysis and non-specific interactions with multiple off-target molecules, might limit the therapeutic use of peptides. To enhance the stability and/or bioactivity of peptides, the development of "peptidomimetics," which mimick peptide molecules, is considered to be idealistic. Hence, chloroalkene dipeptide isosteres (CADIs) was designed, and their synthetic methods have been developed by us. Briefly, in a CADI an amide bond in peptides is replaced with a chloroalkene structure. CADIs might be superior mimetics of amide bonds because the Van der Waals radii (VDR) and the electronegativity value of a chlorine atom are close to those of the replaced oxygen atom. By a developed method of the "liner synthesis", N-tert-butylsulfonyl protected CADIs can be synthesized via a key reaction involving diastereoselective allylic alkylation using organocopper reagents. On the other hand, by a developed method of the "convergent synthesis", N-fluorenylmethoxycarbonyl (Fmoc)-protected carboxylic acids can be also constructed based on N- and C-terminal analogues from corresponding amino acid starting materials via an Evans syn aldol reaction and the Ichikawa allylcyanate rearrangement reaction involving a [3.3] sigmatropic rearrangement. Notably, CADIs can also be applied for Fmoc-based solid-phase peptide synthesis and therefore introduced into bioactive peptides including as the Arg-Gly-Asp (RGD) peptide and the amyloid β fragment Lys-Leu-Val-Phe-Phe (KLVFF) peptide, which are correlated with cell attachment and Alzheimer's disease (AD), respectively. These CADI-containing peptidomimetics stabilized the conformation and enhanced the potency of the cyclic RGD peptide and the cyclic KLVFF peptide.
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Affiliation(s)
- Takuya Kobayakawa
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University (TMDU), 2-3-10 Kandasurugadai, Chiyoda-ku, Tokyo 101-0062, Japan
| | - Kohei Tsuji
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University (TMDU), 2-3-10 Kandasurugadai, Chiyoda-ku, Tokyo 101-0062, Japan
| | - Hirokazu Tamamura
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University (TMDU), 2-3-10 Kandasurugadai, Chiyoda-ku, Tokyo 101-0062, Japan.
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2
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Rourke MJ, McGill MJ, Yang D, Farnam EJ, Zhu JL, Scheidt KA. Photoredox-Catalyzed Radical-Radical Coupling of Potassium Trifluoroborates with Acyl Azoliums. Synlett 2023; 34:2175-2180. [PMID: 38948905 PMCID: PMC11210951 DOI: 10.1055/s-0041-1738448] [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] [Indexed: 07/02/2024]
Abstract
Potassium trifluoroborates have gained significant utility as coupling partners in organic synthesis, particularly in the Suzuki-Miyaura coupling reaction. Recently, they have also been used as radical precursors under oxidative conditions to generate carbon-centered radicals. These versatile reagents have found new applications in photoredox catalysis, including radical substitution, conjugate addition reactions, and transition metal dual catalysis. In addition, this photomediated redox neutral process has enabled radical-radical coupling with persistent radicals in the absence of a metal, and this process remains to be fully explored. In this study, we report the radical-radical coupling of benzylic potassium trifluoroborate salts with isolated acyl azolium triflates, which are persistent radical precursors. The reaction is catalyzed by an organic photocatalyst and forms isolable tertiary alcohol species. These compounds can be transformed into a range of substituted ketone products by simple treatment with a mild base.
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Affiliation(s)
- Michael J. Rourke
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208 (USA
| | - Matthew J. McGill
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208 (USA
| | - Daniel Yang
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208 (USA
| | - Emelia J. Farnam
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208 (USA
| | - Joshua L. Zhu
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208 (USA
| | - Karl A. Scheidt
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208 (USA
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3
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Li YH, Ouyang Y, Chekshin N, Yu JQ. Pd II-Catalyzed γ-C(sp 3)-H (Hetero)Arylation of Ketones Enabled by Transient Directing Groups. ACS Catal 2022; 12:10581-10586. [PMID: 37305173 PMCID: PMC10249709 DOI: 10.1021/acscatal.2c03400] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Pd(II)-catalyzed γ-C(sp3)-H (hetero)arylation of aliphatic ketones is developed using α-amino acid as transient directing groups (TDG). A variety of aliphatic ketones were (hetero)arylated at the γ-position via a 5,6-membered fused cyclopalladation intermediate to afford the remotely arylated products in up to 88% yield. The crucial ligand effect of 2-pyridone is further enhanced by reducing the loading of acid additives. Consequentially, the improved reactivity of this catalytic system has also made possible the cyclic γ-methylene C(sp3)-H arylation of ketones. Mechanistic investigtigation and comparison to the γ-C-H arylation of aldehydes revealed a structural insight for designing site selective TDG.
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Affiliation(s)
- Yi-Hao Li
- Department of Chemistry, The Scripps Research Institute, 10550 N. Torrey Pines Road, La Jolla, California 92037, United States
| | - Yuxin Ouyang
- Department of Chemistry, The Scripps Research Institute, 10550 N. Torrey Pines Road, La Jolla, California 92037, United States
| | - Nikita Chekshin
- Department of Chemistry, The Scripps Research Institute, 10550 N. Torrey Pines Road, La Jolla, California 92037, United States
| | - Jin-Quan Yu
- Department of Chemistry, The Scripps Research Institute, 10550 N. Torrey Pines Road, La Jolla, California 92037, United States
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4
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Taguchi R, Iwasaki A, Ebihara A, Jeelani G, Nozaki T, Suenaga K. Isolation and Total Synthesis of Beru'amide, an Antitrypanosomal Polyketide from a Marine Cyanobacterium Okeania sp. Org Lett 2022; 24:4710-4714. [PMID: 35713470 DOI: 10.1021/acs.orglett.2c02013] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
A 68 μg amount of an acyclic polyketide, named beru'amide, was isolated from a marine cyanobacterium Okeania sp. Beru'amide contains six unique moieties in its relatively small skeleton. By applying several cutting-edge techniques, including DFT-based chemical shift calculations, we achieved the structure determination and the total synthesis of this highly functionalized scarce natural product. Furthermore, beru'amide was shown to have strong antitrypanosomal activity.
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Affiliation(s)
- Raimu Taguchi
- Department of Chemistry, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, Kanagawa 223-8522, Japan
| | - Arihiro Iwasaki
- Department of Chemistry, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, Kanagawa 223-8522, Japan
| | - Akira Ebihara
- Department of Chemistry, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, Kanagawa 223-8522, Japan
| | - Ghulam Jeelani
- Department of Biomedical Chemistry, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Tomoyoshi Nozaki
- Department of Biomedical Chemistry, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Kiyotake Suenaga
- Department of Chemistry, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, Kanagawa 223-8522, Japan
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5
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Chen PH, Hsu CP, Tseng HC, Liu YH, Chiu CW. [Mes- B-TMP] + borinium cation initiated cyanosilylation and catalysed hydrosilylation of ketones and aldehydes. Chem Commun (Camb) 2021; 57:13732-13735. [PMID: 34870288 DOI: 10.1039/d1cc06319g] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two aryl amino borinium cations derived from Cl(Mes)B-NR2 (NR2 = TMP, HMDS) faced divergent outcomes. As the HMDS-substituted one underwent methyl migration from silicon to boron transforming the putative borinium ion to a silylium ion, [Mes-B-TMP]+ can initiate cyanosilylation and catalyse hydrosilylation of ketones and aldehydes.
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Affiliation(s)
- Po-Han Chen
- Department of Chemistry, National Taiwan University, No. 1, Sec. 4, Roosevelt Rd, Taipei, 10617, Taiwan, Republic of China.
| | - Ching-Pei Hsu
- Department of Chemistry, National Taiwan University, No. 1, Sec. 4, Roosevelt Rd, Taipei, 10617, Taiwan, Republic of China.
| | - Hsi-Ching Tseng
- Department of Chemistry, National Taiwan University, No. 1, Sec. 4, Roosevelt Rd, Taipei, 10617, Taiwan, Republic of China.
| | - Yi-Hung Liu
- Department of Chemistry, National Taiwan University, No. 1, Sec. 4, Roosevelt Rd, Taipei, 10617, Taiwan, Republic of China.
| | - Ching-Wen Chiu
- Department of Chemistry, National Taiwan University, No. 1, Sec. 4, Roosevelt Rd, Taipei, 10617, Taiwan, Republic of China.
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6
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Bach T, Wienhold S, Fritz L, Judt T, Hackl S, Neubauer T, Sauerer B. Studies towards the Synthesis of (–)-Pulvomycin: Construction of the C12–C40 Segment by a Stereoselective Aldol Reaction. SYNTHESIS-STUTTGART 2021. [DOI: 10.1055/a-1464-2576] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
AbstractA convergent strategy was developed for the synthesis of the C12–C40 segment of (–)-pulvomycin. Key step was a diastereoselective aldol reaction between a chiral ethyl ketone representing the C24–C40 fragment and a chiral aldehyde representing the C12–C23 fragment. Both compounds were prepared from enantiomerically pure building blocks in a convergent fashion. The longest linear sequence commenced with a known d-fucose-derived glycosyl donor and entailed a total number of 16 steps. The desired anti-aldol product was obtained in a total yield of 5% over these steps and contains 12 out of 13 stereogenic centers present in the natural product.
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Kuranaga T, Tamura M, Ikeda H, Terada S, Nakagawa Y, Kakeya H. Identification and Total Synthesis of an Unstable Anticancer Macrolide Presaccharothriolide Z Produced by Saccharothrix sp. A1506. Org Lett 2021; 23:7106-7111. [PMID: 34436915 DOI: 10.1021/acs.orglett.1c02506] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Saccharothriolides A-F are 10-membered microbial macrolides proposed to be generated from their precursors presaccharothriolides X-Z. Previously, we isolated presaccharothriolide X, and its unique natural prodrug-like properties have intrigued us. However, the other congeners were not detected. Herein, we detected presaccharothriolide Z using our highly sensitive labeling reagent. Moreover, chemical synthesis of presaccharothriolide Z, the first total synthesis of saccharothriolide-class macrolides, was achieved, and the structure and biological activity of presaccharothriolide Z were determined.
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Affiliation(s)
- Takefumi Kuranaga
- Department of System Chemotherapy and Molecular Sciences, Division of Bioinformatics and Chemical Genomics, Graduate School of Pharmaceutical Sciences, Kyoto University, Yoshida, Sakyo-ku, Kyoto 606-8501, Japan
| | - Miho Tamura
- Department of System Chemotherapy and Molecular Sciences, Division of Bioinformatics and Chemical Genomics, Graduate School of Pharmaceutical Sciences, Kyoto University, Yoshida, Sakyo-ku, Kyoto 606-8501, Japan
| | - Hiroaki Ikeda
- Department of System Chemotherapy and Molecular Sciences, Division of Bioinformatics and Chemical Genomics, Graduate School of Pharmaceutical Sciences, Kyoto University, Yoshida, Sakyo-ku, Kyoto 606-8501, Japan
| | - Sakahiro Terada
- Department of System Chemotherapy and Molecular Sciences, Division of Bioinformatics and Chemical Genomics, Graduate School of Pharmaceutical Sciences, Kyoto University, Yoshida, Sakyo-ku, Kyoto 606-8501, Japan
| | - Yusuke Nakagawa
- Department of System Chemotherapy and Molecular Sciences, Division of Bioinformatics and Chemical Genomics, Graduate School of Pharmaceutical Sciences, Kyoto University, Yoshida, Sakyo-ku, Kyoto 606-8501, Japan
| | - Hideaki Kakeya
- Department of System Chemotherapy and Molecular Sciences, Division of Bioinformatics and Chemical Genomics, Graduate School of Pharmaceutical Sciences, Kyoto University, Yoshida, Sakyo-ku, Kyoto 606-8501, Japan
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8
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Wildermuth RE, Steinborn C, Barber DM, Mühlfenzl KS, Kendlbacher M, Mayer P, Wurst K, Magauer T. Evolution of a Strategy for the Total Synthesis of (+)-Cornexistin. Chemistry 2021; 27:12181-12189. [PMID: 34105834 PMCID: PMC8457225 DOI: 10.1002/chem.202101849] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2021] [Indexed: 12/13/2022]
Abstract
Herein is given a full account of the evolution of the first total synthesis of (+)-cornexistin. Initial efforts were based on masking the reactive maleic anhydride moiety as a 3,4-substituted furan and on forming the nine-membered carbocycle in an intramolecular Conia-ene or Nozaki-Hiyama-Kishi (NHK) reaction. Those strategies suffered from low yields and were jeopardized by a late-stage installation of the Z-alkene, as well as the stereocenters along the eastern periphery. These issues were addressed by employing a chiral-pool strategy that involved construction of the crucial stereocenters at C2, C3 and C8 at an early stage with installation of the maleic anhydride as late as possible. The successful approach featured an intermolecular NHK coupling to install the Z-alkene, a syn-Evans-aldol reaction to forge the stereocenters along the eastern periphery, an intramolecular allylic alkylation to close the nine-membered carbocycle, and a challenging stepwise hydrolysis of a β-keto nitrile to furnish the maleic anhydride.
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Affiliation(s)
- Raphael E. Wildermuth
- Institute of Organic Chemistry and Center for Molecular BiosciencesLeopold-Franzens-University InnsbruckInnrain 80–826020InnsbruckAustria
- Department of Chemistry and PharmacyLudwig-Maximilians-University MunichButenandtstrasse 5–1381377MunichGermany
| | - Christian Steinborn
- Institute of Organic Chemistry and Center for Molecular BiosciencesLeopold-Franzens-University InnsbruckInnrain 80–826020InnsbruckAustria
| | - David M. Barber
- Research & DevelopmentWeed Control Chemistry, Bayer AG Crop Science Division Industriepark Höchst65926Frankfurt am MainGermany
| | - Kim S. Mühlfenzl
- Department of Chemistry and PharmacyLudwig-Maximilians-University MunichButenandtstrasse 5–1381377MunichGermany
| | - Mario Kendlbacher
- Institute of Organic Chemistry and Center for Molecular BiosciencesLeopold-Franzens-University InnsbruckInnrain 80–826020InnsbruckAustria
| | - Peter Mayer
- Department of Chemistry and PharmacyLudwig-Maximilians-University MunichButenandtstrasse 5–1381377MunichGermany
| | - Klaus Wurst
- Institute of GeneralInorganic & Theoretical ChemistryLeopold-Franzens-University InnsbruckInnrain 80–826020InnsbruckAustria
| | - Thomas Magauer
- Institute of Organic Chemistry and Center for Molecular BiosciencesLeopold-Franzens-University InnsbruckInnrain 80–826020InnsbruckAustria
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9
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Wang Y, Wu G, Xu X, Pang B, Liao S, Ji Y. Palladium-Catalyzed β-C(sp 3)-H Arylation of Aliphatic Ketones Enabled by a Transient Directing Group. J Org Chem 2021; 86:7296-7303. [PMID: 33950672 DOI: 10.1021/acs.joc.1c00646] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The direct arylation of aliphatic ketones has been developed via Pd-catalyzed β-C(sp3)-H bond functionalization with 2-(aminooxy)-N,N-dimethylacetamide as a novel transient directing group (TDG), which showed remarkable directing ability to generate arylated products in moderate to good yields. Furthermore, the reaction can tolerate abundant substrate of ketones and aryl iodides. This study expands the scope of applications for TDGs.
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Affiliation(s)
- Yangyang Wang
- Engineering Research Centre of Pharmaceutical Process Chemistry, Ministry of Education; School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, P.R. China
| | - Gaorong Wu
- Engineering Research Centre of Pharmaceutical Process Chemistry, Ministry of Education; School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, P.R. China
| | - Xiaobo Xu
- Engineering Research Centre of Pharmaceutical Process Chemistry, Ministry of Education; School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, P.R. China
| | - Binghan Pang
- Engineering Research Centre of Pharmaceutical Process Chemistry, Ministry of Education; School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, P.R. China
| | - Shaowen Liao
- Shanghai Jinli Pharmaceutical Co. Ltd., 108 Yuegong Road, Shanghai 201507, P.R. China
| | - Yafei Ji
- Engineering Research Centre of Pharmaceutical Process Chemistry, Ministry of Education; School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, P.R. China
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10
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Kobayakawa T, Azuma C, Watanabe Y, Sawamura S, Taniguchi A, Hayashi Y, Tsuji K, Tamamura H. Development of Methods for Convergent Synthesis of Chloroalkene Dipeptide Isosteres and Its Application. J Org Chem 2021; 86:5091-5101. [DOI: 10.1021/acs.joc.0c03019] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Takuya Kobayakawa
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University (TMDU), Chiyoda-ku, Tokyo 101-0062, Japan
| | - Chika Azuma
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University (TMDU), Chiyoda-ku, Tokyo 101-0062, Japan
| | - Yuki Watanabe
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University (TMDU), Chiyoda-ku, Tokyo 101-0062, Japan
| | - Shunsuke Sawamura
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University (TMDU), Chiyoda-ku, Tokyo 101-0062, Japan
| | - Atsuhiko Taniguchi
- School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, Hachioji, Tokyo 192-0392, Japan
| | - Yoshio Hayashi
- School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, Hachioji, Tokyo 192-0392, Japan
| | - Kohei Tsuji
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University (TMDU), Chiyoda-ku, Tokyo 101-0062, Japan
| | - Hirokazu Tamamura
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University (TMDU), Chiyoda-ku, Tokyo 101-0062, Japan
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11
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Ohara M, Ikeda A, Nakajima A, Ōno T, Noguchi Y, Watanabe A, Hirose T, Sunazuka T. Towards the total synthesis of aurodox: Preparation of the key hemiacetal-lactone. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2020.152799] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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12
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Senapati BK. Progress in the total synthesis of inthomycins. Beilstein J Org Chem 2021; 17:58-82. [PMID: 33488832 PMCID: PMC7801802 DOI: 10.3762/bjoc.17.7] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2020] [Accepted: 12/03/2020] [Indexed: 12/23/2022] Open
Abstract
The inthomycin family of antibiotics, isolated from Streptomyces strains, are interesting molecules for synthesis due to their characteristic common oxazole polyene chiral allylic β-hydroxycarbonyl fragments and significant biological activities. The full structural motif of the inthomycins is found in several more complex natural products including the oxazolomycins, 16-methyloxazolomycin, curromycins A and B, and KSM-2690. This review summarises the application of various efforts towards the synthesis of inthomycins and their analogues systematically.
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Affiliation(s)
- Bidyut Kumar Senapati
- Department of Chemistry, Prabhat Kumar College, Contai, 721404, India, Tel.: +91 8145207480
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13
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Guo X, Wu Y, Li G, Xia JB. Redox-Triggered Ruthenium-Catalyzed Remote C–H Acylation with Primary Alcohols. ACS Catal 2020. [DOI: 10.1021/acscatal.0c03343] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Xiao Guo
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, Center for Excellence in Molecular Synthesis, Suzhou Research Institute of LICP, Lanzhou Institute of Chemical Physics (LICP), University of Chinese Academy of Sciences, Chinese Academy of Sciences, Lanzhou 730000, China
- Key Laboratory of Flexible Electronic (KLOFE) & Institute of Advanced Materials (IAM), Jiangsu National Synergistic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University, Nanjing 21181, China
| | - Yang Wu
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, Center for Excellence in Molecular Synthesis, Suzhou Research Institute of LICP, Lanzhou Institute of Chemical Physics (LICP), University of Chinese Academy of Sciences, Chinese Academy of Sciences, Lanzhou 730000, China
| | - Gongqiang Li
- Key Laboratory of Flexible Electronic (KLOFE) & Institute of Advanced Materials (IAM), Jiangsu National Synergistic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University, Nanjing 21181, China
| | - Ji-Bao Xia
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, Center for Excellence in Molecular Synthesis, Suzhou Research Institute of LICP, Lanzhou Institute of Chemical Physics (LICP), University of Chinese Academy of Sciences, Chinese Academy of Sciences, Lanzhou 730000, China
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14
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Pereira de Sant'Ana D, de Oliveira Rezende Júnior C, Campagne JM, Dias LC, Marcia de Figueiredo R. Synthetic Studies toward the Total Synthesis of Tautomycetin. J Org Chem 2019; 84:12344-12357. [PMID: 31480837 DOI: 10.1021/acs.joc.9b01712] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The studies culminating in the synthesis of two large subunits of tautomycetin are described. The first one, fragment C1-C12 that has an anti-1,3-dimethyl system and a terminal diene unit, was accomplished in 10 linear steps in 7.4% overall yield. The second one, fragment C13-C25 which bears the sensitive anhydride framework and the majority of the stereogenic centers, was prepared in 13 linear steps (longest sequence) in 8% overall yield. Among the key transformations used, a regioselective epoxide opening, a Pd-catalyzed addition of terminal alkyne to acceptor alkyne, a Mukaiyama aldol reaction, a Yamaguchi esterification, and a homemade mild di-esterification can be cited. The chosen strategies allowed good yields, stereoselectivity, reproducibility, and scalability for several important intermediates.
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Affiliation(s)
- Danilo Pereira de Sant'Ana
- Institute of Chemistry , University of Campinas , Campinas/São Paulo 13083-970 , Brazil.,Institut Charles Gerhardt, UMR 5253, Université de Montpellier, CNRS, ENSCM , 240 Avenue du Professeur Emile Jeanbrau , Montpellier Cedex 5 34296 , France
| | | | - Jean-Marc Campagne
- Institut Charles Gerhardt, UMR 5253, Université de Montpellier, CNRS, ENSCM , 240 Avenue du Professeur Emile Jeanbrau , Montpellier Cedex 5 34296 , France
| | - Luiz Carlos Dias
- Institute of Chemistry , University of Campinas , Campinas/São Paulo 13083-970 , Brazil
| | - Renata Marcia de Figueiredo
- Institut Charles Gerhardt, UMR 5253, Université de Montpellier, CNRS, ENSCM , 240 Avenue du Professeur Emile Jeanbrau , Montpellier Cedex 5 34296 , France
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15
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Probasco MS, Johnson DA, Jennings MP. Stereoselective One-Pot Deconjugation, Aldol, and Stabilized Peterson Olefination of α-Trialkylsilyl-β-alkyl-α,β-Unsaturated Esters. Org Lett 2019; 21:1379-1383. [DOI: 10.1021/acs.orglett.9b00069] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Michael S. Probasco
- Department of Chemistry and Biochemistry, The University of Alabama, Tuscaloosa, Alabama 35487-0336, United States
| | - David A. Johnson
- Department of Chemistry and Biochemistry, The University of Alabama, Tuscaloosa, Alabama 35487-0336, United States
| | - Michael P. Jennings
- Department of Chemistry and Biochemistry, The University of Alabama, Tuscaloosa, Alabama 35487-0336, United States
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16
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Nocquet PA, Macé A, Legros F, Lebreton J, Dujardin G, Collet S, Martel A, Carboni B, Carreaux F. Stereodivergent approach in the protected glycal synthesis of L-vancosamine, L-saccharosamine, L-daunosamine and L-ristosamine involving a ring-closing metathesis step. Beilstein J Org Chem 2018; 14:2949-2955. [PMID: 30546479 PMCID: PMC6278755 DOI: 10.3762/bjoc.14.274] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Accepted: 11/15/2018] [Indexed: 11/23/2022] Open
Abstract
In this paper, a new access to several chiral 3-aminoglycals as potential precursors for glycosylated natural products is reported from a common starting material, (−)-methyl-L-lactate. The stereodivergent strategy is based on the implementation of a ring-closing metathesis of vinyl ethers as key step of reaction sequences developed.
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Affiliation(s)
- Pierre-Antoine Nocquet
- Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226, 263 avenue du Général Leclerc, Campus de Beaulieu, F-35000 Rennes, France
| | - Aurélie Macé
- Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226, 263 avenue du Général Leclerc, Campus de Beaulieu, F-35000 Rennes, France
| | - Frédéric Legros
- Institut des Molécules et Matériaux du Mans, UMR 6283 CNRS-Université du Maine, avenue Olivier Messiaen, 72085 Cedex Le Mans, France
| | - Jacques Lebreton
- Chimie Et Interdisciplinarité: Synthèse, Analyse, Modélisation (CEISAM), UMR 6230 CNRS-Université de Nantes, 2 chemin de la Houssinière, 44322 Cedex Nantes, France
| | - Gilles Dujardin
- Institut des Molécules et Matériaux du Mans, UMR 6283 CNRS-Université du Maine, avenue Olivier Messiaen, 72085 Cedex Le Mans, France
| | - Sylvain Collet
- Chimie Et Interdisciplinarité: Synthèse, Analyse, Modélisation (CEISAM), UMR 6230 CNRS-Université de Nantes, 2 chemin de la Houssinière, 44322 Cedex Nantes, France
| | - Arnaud Martel
- Institut des Molécules et Matériaux du Mans, UMR 6283 CNRS-Université du Maine, avenue Olivier Messiaen, 72085 Cedex Le Mans, France
| | - Bertrand Carboni
- Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226, 263 avenue du Général Leclerc, Campus de Beaulieu, F-35000 Rennes, France
| | - François Carreaux
- Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226, 263 avenue du Général Leclerc, Campus de Beaulieu, F-35000 Rennes, France
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17
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Cui J, Ohtsuki A, Watanabe T, Kumagai N, Shibasaki M. Direct Catalytic Asymmetric Aldol Reaction of Thioamide with an α‐Vinyl Appendage. Chemistry 2018; 24:2598-2601. [DOI: 10.1002/chem.201800020] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2018] [Indexed: 11/11/2022]
Affiliation(s)
- Jin Cui
- Institute of Microbial Chemistry (BIKAKEN) 3-14-23 Kamiosaki Shinagawa-ku Tokyo 141-0021 Japan
| | - Akimichi Ohtsuki
- Institute of Microbial Chemistry (BIKAKEN) 3-14-23 Kamiosaki Shinagawa-ku Tokyo 141-0021 Japan
| | - Takumi Watanabe
- Institute of Microbial Chemistry (BIKAKEN) 3-14-23 Kamiosaki Shinagawa-ku Tokyo 141-0021 Japan
| | - Naoya Kumagai
- Institute of Microbial Chemistry (BIKAKEN) 3-14-23 Kamiosaki Shinagawa-ku Tokyo 141-0021 Japan
| | - Masakatsu Shibasaki
- Institute of Microbial Chemistry (BIKAKEN) 3-14-23 Kamiosaki Shinagawa-ku Tokyo 141-0021 Japan
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18
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Sengupta S, Bae M, Oh DC, Dash U, Kim HJ, Song WY, Shin I, Sim T. Structural Revision of Baulamycin A and Structure-Activity Relationships of Baulamycin A Derivatives. J Org Chem 2017; 82:12947-12966. [PMID: 28903000 DOI: 10.1021/acs.joc.7b01719] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Total synthesis of the proposed structure of baulamycin A was performed. The spectral properties of the synthetic compound differ from those reported for the natural product. On the basis of comprehensive NMR study, we proposed two other possible structures for natural baulamycin A. Total syntheses of these two substances were performed, which enabled assignment of the correct structure of baulamycin A. Key features of the convergent and fully stereocontrolled route include Evans Aldol and Brown allylation reactions to construct the left fragment, a prolinol amide-derived alkylation/desymmetrization to install the methyl-substituted centers in the right fragment, and finally, a Carreira alkynylation to join both fragments. In addition, we have determined the inhibitory activities of novel baulamycin A derivatives against the enzyme SbnE. This SAR study provides useful insight into the design of novel SbnE inhibitors that overcome the drug resistance of pathogens, which cause life-threatening infections.
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Affiliation(s)
- Sandip Sengupta
- Chemical Kinomics Research Center, Korea Institute of Science and Technology (KIST) , 5 Hwarangro 14-gil, Seongbuk-gu, Seoul 02792, Republic of Korea
| | - Munhyung Bae
- Natural Products Research Institute, College of Pharmacy, Seoul National University , 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
| | - Dong-Chan Oh
- Natural Products Research Institute, College of Pharmacy, Seoul National University , 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
| | - Uttam Dash
- Chemical Kinomics Research Center, Korea Institute of Science and Technology (KIST) , 5 Hwarangro 14-gil, Seongbuk-gu, Seoul 02792, Republic of Korea
| | | | | | | | - Taebo Sim
- Chemical Kinomics Research Center, Korea Institute of Science and Technology (KIST) , 5 Hwarangro 14-gil, Seongbuk-gu, Seoul 02792, Republic of Korea
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19
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Hong K, Park H, Yu JQ. Methylene C(sp 3)-H Arylation of Aliphatic Ketones Using a Transient Directing Group. ACS Catal 2017; 7:6938-6941. [PMID: 29038742 PMCID: PMC5640319 DOI: 10.1021/acscatal.7b02905] [Citation(s) in RCA: 77] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Palladium-catalyzed methylene β-C(sp3)-H arylation of aliphatic ketones using a transient directing group is developed. The use of α-benzyl β-alanine directing group that forms a six-membered chelation with palladium is crucial for promoting the methylene C(sp3)-H bond activation.
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Affiliation(s)
- Kai Hong
- Department of Chemistry, The Scripps Research Institute, 10550 N. Torrey Pines Road, La Jolla, California 92037
| | - Hojoon Park
- Department of Chemistry, The Scripps Research Institute, 10550 N. Torrey Pines Road, La Jolla, California 92037
| | - Jin-Quan Yu
- Department of Chemistry, The Scripps Research Institute, 10550 N. Torrey Pines Road, La Jolla, California 92037
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20
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Zhu RY, Liu LY, Yu JQ. Highly Versatile β-C(sp 3)-H Iodination of Ketones Using a Practical Auxiliary. J Am Chem Soc 2017; 139:12394-12397. [PMID: 28844134 PMCID: PMC5710739 DOI: 10.1021/jacs.7b06851] [Citation(s) in RCA: 65] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
The first example of palladium(II)-catalyzed β-C(sp3)-H iodination of a wide range of ketones using a commercially available aminooxyacetic acid auxiliary has been achieved. This L, X-type directing group overcomes the limitations of the transient directing group approach for C(sp3)-H functionalization of ketones. Practical advantages of this method include simple installation of the auxiliary without chromatography, exceptional tolerance of α-functional groups, as well as alkenes and alkynes, and rapid access to diverse sterically hindered quaternary centers.
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Affiliation(s)
- Ru-Yi Zhu
- Department of Chemistry, The Scripps Research Institute , 10550 N. Torrey Pines Road, La Jolla, California 92037, United States
| | - Luo-Yan Liu
- Department of Chemistry, The Scripps Research Institute , 10550 N. Torrey Pines Road, La Jolla, California 92037, United States
| | - Jin-Quan Yu
- Department of Chemistry, The Scripps Research Institute , 10550 N. Torrey Pines Road, La Jolla, California 92037, United States
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21
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Boissarie P, Bélanger G. Short Approach toward the Nonracemic A,B,E Tricyclic Core of Calyciphylline B-Type Alkaloids. Org Lett 2017; 19:3739-3742. [DOI: 10.1021/acs.orglett.7b01566] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Patrick Boissarie
- Département de Chimie, Université de Sherbrooke, 2500 boulevard de l’Université, Sherbrooke, Québec J1K 2R1, Canada
| | - Guillaume Bélanger
- Département de Chimie, Université de Sherbrooke, 2500 boulevard de l’Université, Sherbrooke, Québec J1K 2R1, Canada
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22
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Saleh BA, Smith K, Elliott MC, Jones DH, Kariuki BM, El Hiti GA. Reactions of organoboranes with carbanions bearing three potential leaving groups: unusual processes, products and mechanisms. Tetrahedron 2016. [DOI: 10.1016/j.tet.2016.09.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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23
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Sakamoto Y, Amaya T, Suzuki T, Hirao T. Palladium(II)-Catalyzed Dehydroboration via Generation of Boron Enolates. Chemistry 2016; 22:18686-18689. [PMID: 27734542 DOI: 10.1002/chem.201604306] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2016] [Indexed: 02/01/2023]
Abstract
The PdII -catalyzed dehydroboration of boron enolates generated from ketones and 9-iodo-9-borabicyclo[3.3.1]nonane was achieved, providing a synthetically versatile protocol from ketones to α,β-unsaturated ketones. The PdII compound employed in this reaction worked catalytically in the presence of Cu(OAc)2 . The high trans-selectivity of the olefinic moiety was observed. Aryl halide moieties (-Br and -Cl) remained intact for this reaction in spite of the presence of a Pd species. An ester substrate could also be applied when a stoichiometric amount of PdII was used. The crossover reactions using boron and silyl enolates revealed that the oxidation reaction is much faster than the Saegusa-Ito reaction.
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Affiliation(s)
- Yuki Sakamoto
- The Institute of Scientific and Industrial Research, Osaka University, Mihoga-oka, Ibaraki, Osaka, 567-0047, Japan
| | - Toru Amaya
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - Takeyuki Suzuki
- The Institute of Scientific and Industrial Research, Osaka University, Mihoga-oka, Ibaraki, Osaka, 567-0047, Japan
| | - Toshikazu Hirao
- The Institute of Scientific and Industrial Research, Osaka University, Mihoga-oka, Ibaraki, Osaka, 567-0047, Japan
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24
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Ochiai K, Kuppusamy S, Yasui Y, Okano T, Matsumoto Y, Gupta NR, Takahashi Y, Kubota T, Kobayashi J, Hayashi Y. Total Synthesis of the 7,10-Epimer of the Proposed Structure of Amphidinolide N, Part I: Synthesis of the C1-C13 Subunit. Chemistry 2016; 22:3282-3286. [DOI: 10.1002/chem.201504674] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2015] [Indexed: 11/10/2022]
Affiliation(s)
- Koji Ochiai
- Department of Industrial Chemistry; Faculty of Engineering; Tokyo University of Science; Kagurazaka, Shinjuku-ku Tokyo 162-8601 Japan
| | - Sankar Kuppusamy
- Department of Industrial Chemistry; Faculty of Engineering; Tokyo University of Science; Kagurazaka, Shinjuku-ku Tokyo 162-8601 Japan
| | - Yusuke Yasui
- Department of Industrial Chemistry; Faculty of Engineering; Tokyo University of Science; Kagurazaka, Shinjuku-ku Tokyo 162-8601 Japan
| | - Tsubasa Okano
- Department of Industrial Chemistry; Faculty of Engineering; Tokyo University of Science; Kagurazaka, Shinjuku-ku Tokyo 162-8601 Japan
| | - Yasunobu Matsumoto
- Department of Industrial Chemistry; Faculty of Engineering; Tokyo University of Science; Kagurazaka, Shinjuku-ku Tokyo 162-8601 Japan
| | - Nishant R. Gupta
- Department of Industrial Chemistry; Faculty of Engineering; Tokyo University of Science; Kagurazaka, Shinjuku-ku Tokyo 162-8601 Japan
| | - Yohei Takahashi
- Graduate School of Pharmaceutical Sciences; Hokkaido University; Sapporo 060-0812 Japan
| | - Takaaki Kubota
- Graduate School of Pharmaceutical Sciences; Hokkaido University; Sapporo 060-0812 Japan
- Showa Pharmaceutical University; 3-3165 Higashi-Tamagawagakuen, Machida Tokyo 194-8543 Japan
| | - Jun'ichi Kobayashi
- Graduate School of Pharmaceutical Sciences; Hokkaido University; Sapporo 060-0812 Japan
| | - Yujiro Hayashi
- Department of Industrial Chemistry; Faculty of Engineering; Tokyo University of Science; Kagurazaka, Shinjuku-ku Tokyo 162-8601 Japan
- Department of Chemistry; Graduate School of Science; Tohoku University; Aoba-ku Sendai 980-8578 Japan
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25
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Affiliation(s)
- Atsushi Abiko
- Department of Biobased Materials Science, Graduate School of Science and Technology, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto, 606-8585, Japan
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26
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Tetrahedral boronates as basic catalysts in the aldol reaction. ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES 2015. [DOI: 10.1515/znb-2015-0029] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
β-Hydroxyketones are versatile building blocks in organic synthesis, which can be conveniently synthesized from ketones and aldehydes by aldol reactions. Unfortunately, these reactions often suffer from dehydration of the initially formed β-hydroxyketones. Previously, tetrahedral 3,5-difluorophenylborate was shown to be an efficient and selective catalyst for this reaction. The present investigation concerns the catalytic performance of phenyl borates with different substitution patterns in the aldol reaction. It appears that the dehydration reaction can be suppressed by selecting substituents and substituent positions with reduced electron withdrawing effects on the borate function. Optimal suppression of the dehydration of β-hydroxyketones was obtained for compounds corresponding to phenylboronic acids with a pK
a > 7. The reactions between benzaldehyde and butanone or 3-pentanone did not show diastereoselectivity, which suggests that the catalysts merely act as bases rather than as templates for the transition state of the aldol reaction. Sterically more demanding ketones were not converted.
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27
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Ueda K, Umihara H, Yokoshima S, Fukuyama T. Conversion of Ester Moieties to 4-Bromophenyl Groups via Electrocyclic Reaction of Dibromocyclopropanes. Org Lett 2015; 17:3191-3. [DOI: 10.1021/acs.orglett.5b01351] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Kyosuke Ueda
- Graduate
School of Pharmaceutical Sciences, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan
| | - Hirotatsu Umihara
- Graduate
School of Pharmaceutical Sciences, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan
- Graduate
School of Pharmaceutical Sciences, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Satoshi Yokoshima
- Graduate
School of Pharmaceutical Sciences, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan
| | - Tohru Fukuyama
- Graduate
School of Pharmaceutical Sciences, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan
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28
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Usui K, Suzuki T, Nakada M. A highly stereoselective intramolecular Diels–Alder reaction for construction of the AB ring moiety of bruceantin. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.01.139] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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29
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30
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An W. The role of synergic interaction in transition state formation for the aldol reaction on a metal oxide catalyst: a DFT investigation. Phys Chem Chem Phys 2015; 17:22529-32. [DOI: 10.1039/c5cp03478g] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This contribution highlights an eight-membered ring transition state for the aldol reaction of propanal on O-terminated ZrO2(111) and CeO2(111) surfaces.
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Affiliation(s)
- Wei An
- College of Chemistry and Chemical Engineering
- Shanghai University of Engineering Science
- Shanghai 201620
- China
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31
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Takahashi M, Suzuki N, Ishikawa T, Huang HY, Chang HS, Chen IS. Unprecedented 8,9'-neolignans: enantioselective synthesis of possible stereoisomers for structural determination. JOURNAL OF NATURAL PRODUCTS 2014; 77:2585-2589. [PMID: 25427159 DOI: 10.1021/np500641a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
(+)-Wutaienin (3) and its C-7 methyl ether (4), isolated from Zanthoxylum wutaiense, were found to be unprecedented 8,9'-neolignans containing an (S)-2-(1,1-dimethyl-1-hydroxymethyl)-7-methoxydihydrobenzofuran skeleton. Wutaienin (3) was present in the plant as an inseparable 1:1 mixture of the (7,8)-syn-diastereoisomers. The diastereoisomeric mixture was characterized by comparison with four possible diastereoisomers, which were enantioselectively synthesized from (S)-5-bromo-(1,1-dimethyl-1-hydroxymethyl)-7-methoxydihydrobenzofuran using Evans' oxazolidinone-assisted asymmetric aldol condensation to install the chiral centers at the C-7 and C-8 positions.
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Affiliation(s)
- Masato Takahashi
- Graduate School of Pharmaceutical Sciences, Chiba University , 1-8-1 Inohana, Chuo, Chiba 260-8675, Japan
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32
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Soorukram D, Panmuang J, Tuchinda P, Kuhakarn C, Reutrakul V, Pohmakotr M. A stereoselective approach to bioactive secolignans: synthesis of peperomin C and its analogues. Tetrahedron 2014. [DOI: 10.1016/j.tet.2014.07.101] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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33
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34
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Matsuo J, Murakami M. 40 Jahre Mukaiyama‐Aldolreaktion: eine Erfolgsgeschichte. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201303192] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Jun‐ichi Matsuo
- Division of Pharmaceutical Sciences, Graduate School of Medical Sciences, Kanazawa University, Kanazawa 920‐1192 (Japan)
| | - Masahiro Murakami
- Department of Synthetic Chemistry and Biological Chemistry, Kyoto University, Katsura, Kyoto 615‐8510 (Japan) http://www.sbchem.kyoto‐u.ac.jp/murakami‐lab/
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35
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Matsuo JI, Murakami M. The Mukaiyama Aldol Reaction: 40 Years of Continuous Development. Angew Chem Int Ed Engl 2013; 52:9109-18. [DOI: 10.1002/anie.201303192] [Citation(s) in RCA: 209] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2013] [Indexed: 11/09/2022]
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36
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Kuranaga T, Sesoko Y, Sakata K, Maeda N, Hayata A, Inoue M. Total Synthesis and Complete Structural Assignment of Yaku’amide A. J Am Chem Soc 2013; 135:5467-74. [DOI: 10.1021/ja401457h] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Takefumi Kuranaga
- Graduate
School of Pharmaceutical Sciences, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033,
Japan
| | - Yusuke Sesoko
- Graduate
School of Pharmaceutical Sciences, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033,
Japan
| | - Komei Sakata
- Graduate
School of Pharmaceutical Sciences, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033,
Japan
| | - Naoya Maeda
- Graduate
School of Pharmaceutical Sciences, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033,
Japan
| | - Atsushi Hayata
- Graduate
School of Pharmaceutical Sciences, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033,
Japan
| | - Masayuki Inoue
- Graduate
School of Pharmaceutical Sciences, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033,
Japan
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38
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Müller T, Djanashvili K, Arends IWCE, Peters JA, Hanefeld U. Aldol reactions mediated by a tetrahedral boronate. Chem Commun (Camb) 2012. [PMID: 23191985 DOI: 10.1039/c2cc37047f] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The base is a key factor in aldol reactions in organic media, determining the selectivity. Here, we describe a tetrahedral phenylboronate salt as a mild non-nucleophilic base that is able to catalyse the aldol reaction and significantly decrease the formation of undesired elimination products.
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Affiliation(s)
- Tobias Müller
- Biokatalyse & Organische Chemie, Gebouw voor Scheikunde, Afdeling Biotechnologie, Technische Universiteit Delft, Julianalaan 136, 2628BL Delft, The Netherlands
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39
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Elkin PK, Levin VV, Dilman AD, Struchkova MI, Arkhipov DE, Korlyukov AA. Three-component reactions of CF3-substituted boranes, ethyl diazoacetate and imines. Tetrahedron Lett 2012. [DOI: 10.1016/j.tetlet.2012.08.153] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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40
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Meyer MP. New Applications of Isotope Effects in the Determination of Organic Reaction Mechanisms. ADVANCES IN PHYSICAL ORGANIC CHEMISTRY 2012. [DOI: 10.1016/b978-0-12-398484-5.00002-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/04/2022]
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41
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P. Hsung R, Tang Y, Yang JH, Liu J, Wang CC, Lv MC, Wu YB, Yu XL, Ko C. ASSEMBLY OF THE SOUTHERN MACROCYCLIC HALF OF (+)-SPIRASTRELLOLIDE A THROUGH CYCLIC ACETAL TETHERED RING-CLOSING METATHESIS AND 1,3-ANTI-MUKAIYAMA-ALDOL. HETEROCYCLES 2012. [DOI: 10.3987/com-12-s(n)54] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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43
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Abstract
Kinetic isotope effects are exquisitely sensitive probes of transition structure. As such, kinetic isotope effects offer a uniquely useful probe for the symmetry-breaking process that is inherent to stereoselective reactions. In this Concept article, we explore the role of steric and electronic effects in stereocontrol, and we relate these concepts to recent studies carried out in our laboratory. We also explore the way in which kinetic isotope effects serve as useful points of contact with computational models of transition structures. Finally, we discuss future opportunities for kinetic isotope effects to play a role in asymmetric catalyst development.
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Affiliation(s)
- Thomas Giagou
- School of Natural Sciences, University of California Merced, 5200 N. Lake Rd., Merced, CA 95344 (USA)
| | - Matthew P. Meyer
- School of Natural Sciences, University of California Merced, 5200 N. Lake Rd., Merced, CA 95344 (USA)
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44
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45
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Watanabe Y, Yamazaki T, Kubota T. Stereoselective aldol reaction of glutarimides using pseudo C(2) symmetry. Org Lett 2010; 12:268-71. [PMID: 20020733 DOI: 10.1021/ol902592t] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The boron aldol reaction of beta-substituted glutaric imides bearing an oxazolidinone-based auxiliary proceeds with excellent diastereoselectivity; switching the tertiary amine employed between i-Pr(2)EtN or Et(3)N affords enantiomeric lactone product.
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Affiliation(s)
- Yohsuke Watanabe
- Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Nakacho, Koganei 184-8588, Japan
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46
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Ramachandran PV, Pratihar D. Asymmetric aldol reaction with diisopinocampheyl enolborinates of propionates. Org Lett 2009; 11:1467-70. [PMID: 19265395 DOI: 10.1021/ol802850w] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A convenient and general, reagent-controlled, diastereo- and enantioselective aldol reaction of diisopinocampheylboron enolates of esters, followed by reduction, has been developed as an alternative to crotylboration-ozonolysis. This protocol was then exploited for the double diastereoselective synthesis of the C11-C17 subunit of (-)-dictyostatin.
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47
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Camphor-based α-bromoketones for the asymmetric darzens reaction: Insights into the mechanism using density functional theory. J STRUCT CHEM+ 2008. [DOI: 10.1007/s10947-008-0144-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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48
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Specklin S, Bertus P, Weibel JM, Pale P. A Versatile and Highly Stereoselective Access to Vinyl Triflates Derived from 1,3-Dicarbonyl and Related Compounds. J Org Chem 2008; 73:7845-8. [DOI: 10.1021/jo8015049] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Simon Specklin
- Laboratoire de Synthèse et Réactivité Organiques, associé au CNRS, Institut de Chimie, Université Louis Pasteur, 4 rue Blaise Pascal, 67000 Strasbourg, France
| | - Philippe Bertus
- Laboratoire de Synthèse et Réactivité Organiques, associé au CNRS, Institut de Chimie, Université Louis Pasteur, 4 rue Blaise Pascal, 67000 Strasbourg, France
| | - Jean-Marc Weibel
- Laboratoire de Synthèse et Réactivité Organiques, associé au CNRS, Institut de Chimie, Université Louis Pasteur, 4 rue Blaise Pascal, 67000 Strasbourg, France
| | - Patrick Pale
- Laboratoire de Synthèse et Réactivité Organiques, associé au CNRS, Institut de Chimie, Université Louis Pasteur, 4 rue Blaise Pascal, 67000 Strasbourg, France
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Ma L, Hopson R, Li D, Zhang Y, Williard PG. Synthesis and Structural Characterization of the Bis(diisopropylamino)boron Enolate of tert-Butyl Methyl Ketone. Organometallics 2007. [DOI: 10.1021/om700676w] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Lili Ma
- Department of Chemistry, Brown University, Providence, Rhode Island 02912 and Department of Chemistry, Boston University, 590 Commonwealth Avenue, Boston, Massachusetts 02215
| | - Russell Hopson
- Department of Chemistry, Brown University, Providence, Rhode Island 02912 and Department of Chemistry, Boston University, 590 Commonwealth Avenue, Boston, Massachusetts 02215
| | - Deyu Li
- Department of Chemistry, Brown University, Providence, Rhode Island 02912 and Department of Chemistry, Boston University, 590 Commonwealth Avenue, Boston, Massachusetts 02215
| | - Yong Zhang
- Department of Chemistry, Brown University, Providence, Rhode Island 02912 and Department of Chemistry, Boston University, 590 Commonwealth Avenue, Boston, Massachusetts 02215
| | - Paul G. Williard
- Department of Chemistry, Brown University, Providence, Rhode Island 02912 and Department of Chemistry, Boston University, 590 Commonwealth Avenue, Boston, Massachusetts 02215
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Evans DA, Nelson JV, Taber TR. Stereoselective Aldol Condensations. TOPICS IN STEREOCHEMISTRY 2007. [DOI: 10.1002/9780470147221.ch1] [Citation(s) in RCA: 335] [Impact Index Per Article: 19.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
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