1
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Navaneetha N, Munakala A, Chegondi R. Ag(I)-catalyzed diastereoselective oxidative cyclopropanation of prochiral alkyne-tethered 1,3-dicarbonitriles. Chem Commun (Camb) 2024. [PMID: 39239712 DOI: 10.1039/d4cc03697b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/07/2024]
Abstract
Herein, we developed a highly diastereoselective silver-catalyzed intramolecular cyclopropanation of prochiral alkyne-tethered 1,3-dicarbonitriles using perchloric acid as an effective oxidizing agent. This method facilitates the construction of densely functionalized complex [6.6.5.3] frameworks having three all-carbon quaternary stereocenters in high yields. The significance of the reaction was demonstrated by a gram-scale reaction and post-synthetic modifications of the product.
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Affiliation(s)
- N Navaneetha
- Department of Organic Synthesis and Process Chemistry CSIR-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad 500007, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India.
| | - Anandarao Munakala
- Department of Organic Synthesis and Process Chemistry CSIR-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad 500007, India
| | - Rambabu Chegondi
- Department of Organic Synthesis and Process Chemistry CSIR-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad 500007, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India.
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2
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Ciss I, Seck M, Figadère B, Ferrié L. Advances Toward Amphidinolides C, F and U: Isolations, Synthetic Studies and Total Syntheses. Chemistry 2024; 30:e202400471. [PMID: 38407454 DOI: 10.1002/chem.202400471] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2024] [Revised: 02/23/2024] [Accepted: 02/26/2024] [Indexed: 02/27/2024]
Abstract
Amphidinolides C, F, and U, including C2-C4 analogs, are highly cytotoxic marine macrolides, mainly isolated from dinoflagellates of the genus Amphidinium. All these polyketides share a 75 % or more similar structure, highlighted by a macrolactone ring, at least one trans-2,5-substituted-THF motif and a characteristic polyenic side chain. From their isolation and absolute configurational assignment, the total synthesis of these marine macrolides represented an intense challenge to the organic synthesis community over the last 15 years, with around 14 research groups engaged in this inspiring task. In the first part of this review, we present the different approaches to the isolation and characterization of these natural products, including the most recent analogs, which may cast doubt on the biogenetic origin of these compounds. The various synthetic approaches to the total synthesis of C, F, and U amphidinolides are presented in a second part, focusing on key reactions and/or innovative strategies. The review concludes in a third section summarizing the successful approaches leading to the total synthesis of one of the members of this amphidinolide subfamily.
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Affiliation(s)
- Ismaila Ciss
- BioCIS, Faculté de Pharmacie, Université Paris-Saclay, CNRS, 91400, Orsay, France
- Laboratoire de Chimie Organique et Chimie Thérapeutique, Faculté de Médecine, de Pharmacie et d'Odontologie, Université Cheikh Anta Diop de Dakar -, BP 5005, Dakar-Fann, Sénégal
| | - Matar Seck
- Laboratoire de Chimie Organique et Chimie Thérapeutique, Faculté de Médecine, de Pharmacie et d'Odontologie, Université Cheikh Anta Diop de Dakar -, BP 5005, Dakar-Fann, Sénégal
| | - Bruno Figadère
- BioCIS, Faculté de Pharmacie, Université Paris-Saclay, CNRS, 91400, Orsay, France
| | - Laurent Ferrié
- BioCIS, Faculté de Pharmacie, Université Paris-Saclay, CNRS, 91400, Orsay, France
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3
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Chen X, Luo Z, Chen Y, Zhang Y. Silver(I)-Catalyzed Oxidative Cyclopropanation of 1,6-Enynes: Synthesis of 3-Aza-bicyclo[3.1.0]hexane Derivatives. Org Lett 2022; 24:9200-9204. [PMID: 36484531 DOI: 10.1021/acs.orglett.2c03619] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
A simple Ag(I)-catalyzed oxidative cyclopropanation of heteroatom-tethered 1,6-enynes for the establishment of valuable functionalized 3-aza-bicyclo[3.1.0]hexane is presented, which allows the formation of multiple chemical bonds in one step under 20 mol % silver(I) catalysts and air conditions. This approach is highly atom economical, easy to perform, and free of external oxidants and features good to excellent yields and gram-scale synthesis. The preliminary study showed that an uncommon silver carbenoid intermediate might be involved in this process.
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Affiliation(s)
- Xia Chen
- State Key Laboratory of Biocatalysis and Enzyme Engineering, National & Local Joint Engineering Research Center of High-throughput Drug Screening Technology, Hubei Key Laboratory of Biotechnology of Chinese Traditional Medicine, School of Life Sciences, Hubei University, Wuhan, Hubei 430062, China
| | - Zengwei Luo
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, China
| | - Yong Chen
- State Key Laboratory of Biocatalysis and Enzyme Engineering, National & Local Joint Engineering Research Center of High-throughput Drug Screening Technology, Hubei Key Laboratory of Biotechnology of Chinese Traditional Medicine, School of Life Sciences, Hubei University, Wuhan, Hubei 430062, China
| | - Yonghui Zhang
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, China
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4
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Lee YS. Peptidomimetics and Their Applications for Opioid Peptide Drug Discovery. Biomolecules 2022; 12:biom12091241. [PMID: 36139079 PMCID: PMC9496382 DOI: 10.3390/biom12091241] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Revised: 08/29/2022] [Accepted: 09/02/2022] [Indexed: 11/16/2022] Open
Abstract
Despite various advantages, opioid peptides have been limited in their therapeutic uses due to the main drawbacks in metabolic stability, blood-brain barrier permeability, and bioavailability. Therefore, extensive studies have focused on overcoming the problems and optimizing the therapeutic potential. Currently, numerous peptide-based drugs are being marketed thanks to new synthetic strategies for optimizing metabolism and alternative routes of administration. This tutorial review briefly introduces the history and role of natural opioid peptides and highlights the key findings on their structure-activity relationships for the opioid receptors. It discusses details on opioid peptidomimetics applied to develop therapeutic candidates for the treatment of pain from the pharmacological and structural points of view. The main focus is the current status of various mimetic tools and the successful applications summarized in tables and figures.
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Affiliation(s)
- Yeon Sun Lee
- Department of Pharmacology, College of Medicine, University of Arizona, Tucson, AZ 85724, USA
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5
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Yuan F, Zhao Y, Guo Q, Yin F, Lai J, Nian B, Zhang M, Tang E. Synthesis of 1-[1-(Amino)cyclopropyl]ketones by Tandem Reaction Involving Vinyl Selenium Salt. CHINESE J ORG CHEM 2022. [DOI: 10.6023/cjoc202111015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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6
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Costantini M, Mendoza A. Modular Enantioselective Synthesis of cis-Cyclopropanes through Self-Sensitized Stereoselective Photodecarboxylation with Benzothiazolines. ACS Catal 2021; 11:13312-13319. [PMID: 34765283 PMCID: PMC8576787 DOI: 10.1021/acscatal.1c03949] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Revised: 10/12/2021] [Indexed: 12/20/2022]
Abstract
Chiral cis-cyclopropanes are strained rigid analogues of alkyl chains, whose study and application are limited by their difficult synthesis. A modular approach from olefin materials is enabled by the discovery of the electron donor-acceptor (EDA) interaction between 2-substituted benzothiazolines and N-hydroxyphthalimide esters. These complexes are activated by visible light without photocatalysts, and the benzothiazoline reagent plays a triple role as a photoreductant, a stereoselective hydrogen-atom donor, and a Brønsted acid. Beyond the enantioselective synthesis of cis-cyclopropanes, these results introduce benzothiazolines as accessible and easily tunable self-sensitized photoreductants.
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Affiliation(s)
- Matteo Costantini
- Department of Organic Chemistry, Arrhenius
Laboratory, Stockholm University, 106 91 Stockholm, Sweden
| | - Abraham Mendoza
- Department of Organic Chemistry, Arrhenius
Laboratory, Stockholm University, 106 91 Stockholm, Sweden
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7
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An Effective and Safe Enkephalin Analog for Antinociception. Pharmaceutics 2021; 13:pharmaceutics13070927. [PMID: 34206631 PMCID: PMC8308721 DOI: 10.3390/pharmaceutics13070927] [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: 05/19/2021] [Revised: 06/14/2021] [Accepted: 06/18/2021] [Indexed: 11/17/2022] Open
Abstract
Opioids account for 69,000 overdose deaths per annum worldwide and cause serious side effects. Safer analgesics are urgently needed. The endogenous opioid peptide Leu-Enkephalin (Leu-ENK) is ineffective when introduced peripherally due to poor stability and limited membrane permeability. We developed a focused library of Leu-ENK analogs containing small hydrophobic modifications. N-pivaloyl analog KK-103 showed the highest binding affinity to the delta opioid receptor (68% relative to Leu-ENK) and an extended plasma half-life of 37 h. In the murine hot-plate model, subcutaneous KK-103 showed 10-fold improved anticonception (142%MPE·h) compared to Leu-ENK (14%MPE·h). In the formalin model, KK-103 reduced the licking and biting time to ~50% relative to the vehicle group. KK-103 was shown to act through the opioid receptors in the central nervous system. In contrast to morphine, KK-103 was longer-lasting and did not induce breathing depression, physical dependence, and tolerance, showing potential as a safe and effective analgesic.
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8
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Abstract
Diverse structural types of natural products and their mimics have served as targets of opportunity in our laboratory to inspire the discovery and development of new methods and strategies to assemble polyfunctional and polycyclic molecular architectures. Furthermore, our efforts toward identifying novel compounds having useful biological properties led to the creation of new targets, many of which posed synthetic challenges that required the invention of new methodology. In this Perspective, selected examples of how we have exploited a diverse range of natural products and their mimics to create, explore, and solve a variety of problems in chemistry and biology will be discussed. The journey was not without its twists and turns, but the unexpected often led to new revelations and insights. Indeed, in our recent excursion into applications of synthetic organic chemistry to neuroscience, avoiding the more-traveled paths was richly rewarding.
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Affiliation(s)
- Stephen F Martin
- Department of Chemistry, The University of Texas at Austin , Austin, Texas 78712, United States
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9
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Contreras-Cruz DA, Sánchez-Carmona MA, Vengoechea-Gómez FA, Peña-Ortíz D, Miranda LD. Diversity-oriented synthesis of cyclopropyl peptides from Ugi-derived dehydroalanines. Tetrahedron 2017. [DOI: 10.1016/j.tet.2017.09.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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10
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Mizuno A, Matsui K, Shuto S. From Peptides to Peptidomimetics: A Strategy Based on the Structural Features of Cyclopropane. Chemistry 2017. [PMID: 28632330 DOI: 10.1002/chem.201702119] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Peptidomimetics, non-natural mimicries of bioactive peptides, comprise an important class of drug molecules. The essence of the peptidomimetic design is to mimic the key conformation assumed by the bioactive peptides upon binding to their targets. Regulation of the conformation of peptidomimetics is important not only to enhance target binding affinity and selectivity, but also to confer cell-membrane permeability for targeting protein-protein interactions in cells. The rational design of peptidomimetics with suitable three-dimensional structures is challenging, however, due to the inherent flexibility of peptides and their dynamic conformational changes upon binding to the target biomolecules. In this Minireview, a three-dimensional structural diversity-oriented strategy based on the characteristic structural features of cyclopropane to address this challenging issue in peptidomimetic chemistry is described.
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Affiliation(s)
- Akira Mizuno
- Faculty of Pharmaceutical Sciences, Hokkaido University, Kita-12, Nishi-6, Kita-ku, Sapporo, Hokkaido, 060-0812, Japan
| | - Kouhei Matsui
- Pharmaceutical Research Center, Shionogi & Co., Ltd., 3-1-1, Futaba-cho, Toyonaka, Osaka, 561-0825, Japan
| | - Satoshi Shuto
- Faculty of Pharmaceutical Sciences, Hokkaido University, Kita-12, Nishi-6, Kita-ku, Sapporo, Hokkaido, 060-0812, Japan.,Center for Research and Education on Drug Discovery, Hokkaido University, Kita-12, Nishi-6, Kita-ku, Sapporo, Hokkaido, 060-0812, Japan
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11
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Gieuw MH, Ke Z, Yeung YY. Lewis Base Catalyzed Stereo- and Regioselective Bromocyclization. CHEM REC 2016; 17:287-311. [PMID: 27701807 DOI: 10.1002/tcr.201600088] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2016] [Indexed: 01/01/2023]
Abstract
Oxygen- and nitrogen-containing heterocyclic compounds are widely recognized as key components in many natural products and biologically relevant molecules, but often the problem comes down to methodologies in synthesizing them. Halocyclization of olefinic substrates is a promising strategy in the construction of O- and N-heterocyclic compounds, which further signifies the development of their asymmetric variants. Over the past years, our group has been devoted to this particular area of asymmetric electrophilic halocyclization with chalcogen-containing molecules as catalysts. In this account, the main focus is on the development of our novel chiral catalysts and applications derived from the reaction products.
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Affiliation(s)
- Matthew H Gieuw
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, NT, Hong Kong, SAR China
| | - Zhihai Ke
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, NT, Hong Kong, SAR China
| | - Ying-Yeung Yeung
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, NT, Hong Kong, SAR China
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12
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Pedroni J, Saget T, Donets PA, Cramer N. Enantioselective palladium(0)-catalyzed intramolecular cyclopropane functionalization: access to dihydroquinolones, dihydroisoquinolones and the BMS-791325 ring system. Chem Sci 2015; 6:5164-5171. [PMID: 29142735 PMCID: PMC5667185 DOI: 10.1039/c5sc01909e] [Citation(s) in RCA: 87] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2015] [Accepted: 06/17/2015] [Indexed: 01/20/2023] Open
Abstract
Taddol-based phosphoramidite ligands enable enantioselective palladium(0)-catalyzed C-H arylation of cyclopropanes. The cyclized products are obtained in high yields and enantioselectivities. The reported method provides efficient access to a broad range of synthetically attractive cyclopropyl containing dihydroquinolones and dihydroisoquinolones as well as allows for an efficient enantioselective construction of the 7-membered ring of the cyclopropyl indolobenzazepine core of BMS-791325.
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Affiliation(s)
- J Pedroni
- Laboratory of Asymmetric Catalysis and Synthesis , Institute of Chemical Sciences and Engineering , Ecole Polytechnique Fédérale de Lausanne , EPFL SB ISIC LCSA, BCH 4305 , CH-1015 Lausanne , Switzerland .
| | - T Saget
- Laboratory of Asymmetric Catalysis and Synthesis , Institute of Chemical Sciences and Engineering , Ecole Polytechnique Fédérale de Lausanne , EPFL SB ISIC LCSA, BCH 4305 , CH-1015 Lausanne , Switzerland .
| | - P A Donets
- Laboratory of Asymmetric Catalysis and Synthesis , Institute of Chemical Sciences and Engineering , Ecole Polytechnique Fédérale de Lausanne , EPFL SB ISIC LCSA, BCH 4305 , CH-1015 Lausanne , Switzerland .
| | - N Cramer
- Laboratory of Asymmetric Catalysis and Synthesis , Institute of Chemical Sciences and Engineering , Ecole Polytechnique Fédérale de Lausanne , EPFL SB ISIC LCSA, BCH 4305 , CH-1015 Lausanne , Switzerland .
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13
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Kim J, Sim M, Kim N, Hong S. Asymmetric C-H functionalization of cyclopropanes using an isoleucine-NH 2 bidentate directing group. Chem Sci 2015; 6:3611-3616. [PMID: 29511524 PMCID: PMC5659170 DOI: 10.1039/c5sc01137j] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2015] [Accepted: 04/16/2015] [Indexed: 12/19/2022] Open
Abstract
The systematic investigation of substrate-bound α-amino acid auxiliaries has resulted in catalytic asymmetric C-H functionalization of cyclopropanes enabled by amino acid amides as chiral bidentate directing groups. The use of an Ile-NH2 auxiliary embedded in the substrate provided excellent levels of asymmetric induction (diastereomeric ratio of up to 72 : 1) in the Pd(ii)-catalyzed β-methylene C(sp3)-H bond activation of cyclopropanes and cross-coupling with aryl iodides.
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Affiliation(s)
- Jinhee Kim
- Department of Chemistry , Korea Advanced Institute of Science and Technology , Daejeon , 305-701 , Korea
- Center for Catalytic Hydrocarbon Functionalization , Institute for Basic Science (IBS) , Daejeon , 305-701 , Korea .
| | - Mikyung Sim
- Department of Chemistry , Korea Advanced Institute of Science and Technology , Daejeon , 305-701 , Korea
- Center for Catalytic Hydrocarbon Functionalization , Institute for Basic Science (IBS) , Daejeon , 305-701 , Korea .
| | - Namhoon Kim
- Department of Chemistry , Korea Advanced Institute of Science and Technology , Daejeon , 305-701 , Korea
- Center for Catalytic Hydrocarbon Functionalization , Institute for Basic Science (IBS) , Daejeon , 305-701 , Korea .
| | - Sungwoo Hong
- Center for Catalytic Hydrocarbon Functionalization , Institute for Basic Science (IBS) , Daejeon , 305-701 , Korea .
- Department of Chemistry , Korea Advanced Institute of Science and Technology , Daejeon , 305-701 , Korea
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14
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Adly FG, Ghanem A. Chiral Dirhodium(II) Carboxylates and Carboxamidates as Effective Chemzymes in Asymmetric Synthesis of Three-Membered Carbocycles. Chirality 2014; 26:692-711. [DOI: 10.1002/chir.22347] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2014] [Accepted: 05/07/2014] [Indexed: 02/06/2023]
Affiliation(s)
- Frady G. Adly
- Chirality program, Faculty of ESTEM; University of Canberra; ACT Australia
| | - Ashraf Ghanem
- Chirality program, Faculty of ESTEM; University of Canberra; ACT Australia
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15
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Fuwa H, Muto T, Sekine K, Sasaki M. Total synthesis and structure revision of didemnaketal B. Chemistry 2014; 20:1848-60. [PMID: 24431266 DOI: 10.1002/chem.201303713] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2013] [Indexed: 11/07/2022]
Abstract
Didemnaketal B, a structurally complex spiroacetal that exhibits potent HIV-1 protease inhibitory activity, was originally discovered by Faulkner and his colleagues from the ascidian Didemnum sp. collected at Palau. Its absolute configuration was proposed on the basis of degradation/derivatization experiments of the authentic sample. However, our total synthesis of the proposed structure of didemnaketal B questioned the stereochemical assignment made by Faulkner et al. Here we describe in detail our first total synthesis of the proposed structure 2 of didemnaketal B, which features 1) a convergent synthesis of the C7-C21 spiroacetal domain by means of a strategy exploiting Suzuki-Miyaura coupling, 2) an Evans syn-aldol reaction and a vinylogous Mukaiyama aldol reaction for the assembly of the C1-C7 acyclic domain, and 3) a Nozaki-Hiyama-Kishi reaction for the construction of the C21-C28 side chain domain. The NMR spectroscopic discrepancies observed between synthetic 2 and the authentic sample as well as careful inspection of the Faulkner's stereochemical assignment led us to postulate that the absolute configuration of the C10-C20 domain of 2 has been erroneously assigned. Accordingly, the total synthesis of the revised structure 65 was achieved to show that the NMR spectroscopic properties of synthetic 65 were in good agreement with those of the authentic sample. Furthermore, application of the phenylglycine methyl ester (PGME) method to the C7-C21 spiroacetal domain enabled us to establish the absolute configuration of didemnaketal B.
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Affiliation(s)
- Haruhiko Fuwa
- Graduate School of Life Sciences, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577 (Japan), Fax: (+81) 22-217-6214.
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16
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David E, Couve-Bonnaire S, Jubault P, Pannecoucke X. Ethyl dibromofluoroacetate: a versatile reagent for the synthesis of fluorinated molecules. Tetrahedron 2013; 69:11039-11055. [PMID: 32287427 PMCID: PMC7126840 DOI: 10.1016/j.tet.2013.10.048] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2013] [Indexed: 02/01/2023]
Affiliation(s)
- Emilie David
- INSA de Rouen and Université de Rouen, CNRS, UMR 6014 & FR 3038, COBRA, IRCOF, 1 rue Tesnière, 76821 Mont-Saint-Aignan Cedex, France
| | - Samuel Couve-Bonnaire
- INSA de Rouen and Université de Rouen, CNRS, UMR 6014 & FR 3038, COBRA, IRCOF, 1 rue Tesnière, 76821 Mont-Saint-Aignan Cedex, France
| | - Philippe Jubault
- INSA de Rouen and Université de Rouen, CNRS, UMR 6014 & FR 3038, COBRA, IRCOF, 1 rue Tesnière, 76821 Mont-Saint-Aignan Cedex, France
| | - Xavier Pannecoucke
- INSA de Rouen and Université de Rouen, CNRS, UMR 6014 & FR 3038, COBRA, IRCOF, 1 rue Tesnière, 76821 Mont-Saint-Aignan Cedex, France
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17
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Cyclopropane-based conformational restriction of GABA by a stereochemical diversity-oriented strategy: identification of an efficient lead for potent inhibitors of GABA transports. Bioorg Med Chem 2013; 21:4938-50. [PMID: 23886812 DOI: 10.1016/j.bmc.2013.06.063] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2013] [Revised: 06/26/2013] [Accepted: 06/26/2013] [Indexed: 12/22/2022]
Abstract
A series of cyclopropane-based conformationally restricted γ-aminobutyric acid (GABA) analogs with stereochemical diversity, that is, the trans- and cis-2,3-methano analogs Ia and Ib and their enantiomers ent-Ia and ent-Ib, and also the trans- and cis-3,4-methano analogs IIa and IIb and their enantiomers ent-IIa and ent-Iib, were synthesized from the chiral cyclopropane units Type-a and Type-b that we developed. These analogs were systematically evaluated with four GABA transporter (GAT) subtypes. The trans-3,4-methano analog IIa had inhibitory effects on GAT3 (IC50=23.9μM) and betaine-GABA transporter1 (5.48μM), indicating its potential as an effective lead compound for the development of potent GAT inhibitors due to its hydrophilic and low molecular weight properties and excellent ligand efficiency.
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18
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Parella R, Gopalakrishnan B, Babu SA. Auxiliary-Enabled Pd-Catalyzed Direct Arylation of Methylene C(sp3)–H Bond of Cyclopropanes: Highly Diastereoselective Assembling of Di- and Trisubstituted Cyclopropanecarboxamides. Org Lett 2013; 15:3238-41. [DOI: 10.1021/ol4012212] [Citation(s) in RCA: 82] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Ramarao Parella
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Knowledge City, Mohali, Punjab, India
| | - Bojan Gopalakrishnan
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Knowledge City, Mohali, Punjab, India
| | - Srinivasarao Arulananda Babu
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Knowledge City, Mohali, Punjab, India
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19
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Saget T, Perez D, Cramer N. Synthesis of functionalized spiroindolines via palladium-catalyzed methine C-H arylation. Org Lett 2013; 15:1354-7. [PMID: 23452056 DOI: 10.1021/ol400380y] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
The synthesis of cyclopropyl spiroindolines is described using an intramolecular palladium(0)-catalyzed C-H functionalization of a methine C(sp(3))-H bond. This transformation can be coupled with intermolecular Suzuki couplings or direct arylations of heteroaromatics to access functionalized indoline scaffolds in a single step.
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Affiliation(s)
- Tanguy Saget
- Laboratory of Asymmetric Catalysis and Synthesis, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, EPFL SB ISIC LCSA, BCH 4305, CH-1015 Lausanne, Switzerland
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20
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Milanole G, Couve-Bonnaire S, Bonfanti JF, Jubault P, Pannecoucke X. Synthesis of Fluorinated Cyclopropyl Amino Acid Analogues: Toward the Synthesis of Original Fluorinated Peptidomimetics. J Org Chem 2012; 78:212-23. [DOI: 10.1021/jo302222n] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Gaëlle Milanole
- INSA de Rouen, UMR 6014 & FR 3038, COBRA Université de Rouen, 1 rue Tesnière, 76131 Mont-Saint-Aignan Cedex, France
| | - Samuel Couve-Bonnaire
- INSA de Rouen, UMR 6014 & FR 3038, COBRA Université de Rouen, 1 rue Tesnière, 76131 Mont-Saint-Aignan Cedex, France
| | - Jean-François Bonfanti
- Janssen Research & Development, Medicinal Chemistry Infectious Diseases, Centre de Recherche Janssen Cilag, Campus de Maigremont, BP 615, 27106 Val de Reuil Cedex, France
| | - Philippe Jubault
- INSA de Rouen, UMR 6014 & FR 3038, COBRA Université de Rouen, 1 rue Tesnière, 76131 Mont-Saint-Aignan Cedex, France
| | - Xavier Pannecoucke
- INSA de Rouen, UMR 6014 & FR 3038, COBRA Université de Rouen, 1 rue Tesnière, 76131 Mont-Saint-Aignan Cedex, France
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21
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Saget T, Cramer N. Palladium(0)-catalyzed enantioselective C-H arylation of cyclopropanes: efficient access to functionalized tetrahydroquinolines. Angew Chem Int Ed Engl 2012; 51:12842-5. [PMID: 23161777 DOI: 10.1002/anie.201207959] [Citation(s) in RCA: 179] [Impact Index Per Article: 14.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2012] [Indexed: 11/08/2022]
Affiliation(s)
- Tanguy Saget
- Laboratory of Asymmetric Catalysis and Synthesis, EPFL SB ISIC LCSA, BCH 4305, 1015 Lausanne, Switzerland
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22
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Saget T, Cramer N. Palladium(0)-Catalyzed Enantioselective CH Arylation of Cyclopropanes: Efficient Access to Functionalized Tetrahydroquinolines. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201207959] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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23
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Tan CK, Le C, Yeung YY. Enantioselective bromolactonization of cis-1,2-disubstituted olefinic acids using an amino-thiocarbamate catalyst. Chem Commun (Camb) 2012; 48:5793-5. [PMID: 22499150 DOI: 10.1039/c2cc31148h] [Citation(s) in RCA: 110] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
A facile, highly regio- and enantioselective amino-thiocarbamate-catalyzed bromolactonization of cis-1,2-disubstituted olefinic acids has been developed. The use of the enantio-enriched lactones in the synthesis of chiral synthetic intermediates is also demonstrated.
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Affiliation(s)
- Chong Kiat Tan
- Department of Chemistry, NUS, 3 Science Drive 3, Singapore, 11754, Singapore
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24
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Watanabe M, Kobayashi T, Hirokawa T, Yoshida A, Ito Y, Yamada S, Orimoto N, Yamasaki Y, Arisawa M, Shuto S. Cyclopropane-based stereochemical diversity-oriented conformational restriction strategy: Histamine H3and/or H4receptor ligands with the 2,3-methanobutane backbone. Org Biomol Chem 2012; 10:736-45. [DOI: 10.1039/c1ob06496g] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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25
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Janardanan D, Sunoj RB. Chemo-, regio-, and diastereoselectivity preferences in the reaction of a sulfur ylide with a dienal and an enone. Org Biomol Chem 2011; 9:1642-52. [PMID: 21253652 DOI: 10.1039/c0ob00675k] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Mechanistic insights into an interesting class of reaction between sulfur ylides with (i) a dienal, and (ii) an enone, obtained by using density functional theory, is reported. The kinetic and thermodynamic factors responsible for chemo-, regio-, and diastereoselectivities are established by identifying all key transition states and intermediates along the reaction pathway for 1,2-, 1,4-, and 1,6- modes of attack of dimethylsulfonium benzylide to 5-phenylpenta-2,4-dienal. The reaction profiles for 1,2- and 1,4- modes of addition are also evaluated for the reaction between dimethylsulfonium benzylide and pent-3-en-2-one. Our results show that the final outcome of the reaction with both these substrates would be decided by the interplay between kinetic and thermodynamic factors. It is found that the addition of a semi-stabilized ylide to conjugated carbonyl compounds prefers to proceed through a 1,4- (conjugate) pathway under thermodynamic conditions, which is in accordance with the available experimental reports. However, the formation of epoxides via a 1,2- (direct) addition pathway is computed to be equally competitive, which could be the favored pathway under kinetic conditions. Even though the lower barrier for the initial addition step is kinetically advantageous for the direct (or 1,2-) addition pathway, the higher energy of the betaine intermediates--as well as the reversibility of the accompanying elementary step--may disfavor product formation in this route. Thus, high diastereoselectivity in favor of 2,3-trans cyclopropanecarbaldehyde is predicted in the case of the dienal, using the most favored conjugate addition (1,4-addition) pathway. Along similar lines, ylide addition to the enone is identified to exhibit a preference toward conjugate addition over direct (1,2-) addition. The importance of transition state analysis in delineating the controlling factors towards product distribution and diastereoselectivity is established.
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Affiliation(s)
- Deepa Janardanan
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, 400076, India
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26
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Proteau-Gagné A, Bournival V, Rochon K, Dory YL, Gendron L. Exploring the Backbone of Enkephalins To Adjust Their Pharmacological Profile for the δ-Opioid Receptor. ACS Chem Neurosci 2010; 1:757-69. [PMID: 22778812 DOI: 10.1021/cn1000759] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2010] [Accepted: 09/08/2010] [Indexed: 12/23/2022] Open
Abstract
The role of each of the four amide bonds in Leu(5)-enkephalin was investigated by systematically and sequentially replacing each with its corresponding trans-alkene. Six Leu(5)-enkephalin analogs based on six dipeptide surrogates and two Met(5)-enkephalin analogs were synthesized and thoroughly tested using a δ-opioid receptor internalization assay, an ERK1/2 activation assay, and a competition binding assay to evaluate their biological properties. We observed that an E-alkene can efficiently replace the first amide bond of Leu(5)- and Met(5)-enkephalin without significantly affecting biological activity. By contrast, the second amide bond was found to be highly sensitive to the same modification, suggesting that it is involved in biologically essential intra- or intermolecular interactions. Finally, we observed that the affinity and activity of analogs containing an E-alkene at either the third or fourth position were partially reduced, indicating that these amide bonds are less important for these intra- or intermolecular interactions. Overall, our study demonstrates that the systematic and sequential replacement of amide bonds by E-alkene represents an efficient way to explore peptide backbones.
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Affiliation(s)
| | | | | | - Yves L. Dory
- Laboratoire de synthèse supramoléculaire, Département de chimie,
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27
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Watanabe M, Hirokawa T, Kobayashi T, Yoshida A, Ito Y, Yamada S, Orimoto N, Yamasaki Y, Arisawa M, Shuto S. Investigation of the Bioactive Conformation of Histamine H3 Receptor Antagonists by the Cyclopropylic Strain-Based Conformational Restriction Strategy. J Med Chem 2010; 53:3585-93. [DOI: 10.1021/jm901848b] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Mizuki Watanabe
- Faculty of Pharmaceutical Sciences, Hokkaido University, Kita-12, Nishi-6, Kita-ku, Sapporo 060-0812, Japan
| | - Takatsugu Hirokawa
- Computational Biology Research Center, National Institute of Advanced Industrial Science and Technology, Aomi, Koutou-ku, Tokyo 135-0064, Japan
| | - Takaaki Kobayashi
- Faculty of Pharmaceutical Sciences, Hokkaido University, Kita-12, Nishi-6, Kita-ku, Sapporo 060-0812, Japan
| | - Akira Yoshida
- Department of Pharmacokinetics and Pharmacodynammics and Global Center of Excellence (COE), School of Pharmaceutical Sciences, University of Shizuoka, Yada, Shizuoka 422-8526, Japan
| | - Yoshihiko Ito
- Department of Pharmacokinetics and Pharmacodynammics and Global Center of Excellence (COE), School of Pharmaceutical Sciences, University of Shizuoka, Yada, Shizuoka 422-8526, Japan
| | - Shizuo Yamada
- Department of Pharmacokinetics and Pharmacodynammics and Global Center of Excellence (COE), School of Pharmaceutical Sciences, University of Shizuoka, Yada, Shizuoka 422-8526, Japan
| | - Naoki Orimoto
- Hanno Research Center, Taiho Pharmaceutical Co. Ltd., Misugidai, Hanno 357-8527, Japan
| | - Yasundo Yamasaki
- Hanno Research Center, Taiho Pharmaceutical Co. Ltd., Misugidai, Hanno 357-8527, Japan
| | - Mitsuhiro Arisawa
- Faculty of Pharmaceutical Sciences, Hokkaido University, Kita-12, Nishi-6, Kita-ku, Sapporo 060-0812, Japan
| | - Satoshi Shuto
- Faculty of Pharmaceutical Sciences, Hokkaido University, Kita-12, Nishi-6, Kita-ku, Sapporo 060-0812, Japan
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28
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Crucianelli E, Galeazzi R, Martelli G, Orena M, Rinaldi S, Sabatino P. A novel conformationally restricted analogue of 3-methylaspartic acid via stereoselective methylation of chiral pyrrolidin-2-ones. Tetrahedron 2010. [DOI: 10.1016/j.tet.2009.10.004] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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29
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Martelli G, Marcucci E, Orena M, Rinaldi S. Enantiopure derivatives of aza-Baylis-Hillman adducts by subsequent SN'-SN' reactions of acylcarbamates bearing a chiral auxiliary. Molecules 2009; 14:2824-35. [PMID: 19701126 PMCID: PMC6255381 DOI: 10.3390/molecules14082824] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2009] [Revised: 07/22/2009] [Accepted: 07/30/2009] [Indexed: 11/24/2022] Open
Abstract
Reactions of (4S,5R)-1-(3,4-Dimethyl-2-oxo-5-phenylimidazolidine)carbonyl-isocyanate (4) with appropriate Baylis-Hillman adducts 5 gave the corresponding acyl carbamates 6,7 as equimolar diastereomeric mixtures. These mixtures were treated with DABCO, to afford with moderate diastereoselection easily separable [2-(3",4"-dimethyl-2"-oxo-5"-phenylimidazolidine-1-carboxamido)(aryl)methyl]acrylates 8 and 9.
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Affiliation(s)
| | | | - Mario Orena
- Author to whom correspondence should be addressed; E-mail:
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30
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Yamaguchi K, Kazuta Y, Hirano K, Yamada S, Matsuda A, Shuto S. Synthesis of 1-arylpiperazyl-2-phenylcyclopropanes designed as antidopaminergic agents: Cyclopropane-based conformationally restricted analogs of haloperidol. Bioorg Med Chem 2008; 16:8875-81. [DOI: 10.1016/j.bmc.2008.08.061] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2008] [Revised: 08/25/2008] [Accepted: 08/26/2008] [Indexed: 10/21/2022]
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31
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Samet AV, Lutov DN, Konyushkin LD, Strelenko YA, Semenov VV. Preparation of chiral cyclopropanecarboxylic acids and 3-oxabicyclo[3.1.0]hexane-2-ones from levoglucosenone. ACTA ACUST UNITED AC 2008. [DOI: 10.1016/j.tetasy.2008.02.016] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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32
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Formentín P, Murga J, Carda M, Marco JA. Stereoselective synthesis of a C19–C26 fragment of amphidinolides G and H. ACTA ACUST UNITED AC 2006. [DOI: 10.1016/j.tetasy.2006.10.024] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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33
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Application of divergent multi-component reactions in the synthesis of a library of peptidomimetics based on γ-amino-α,β-cyclopropyl acids. Tetrahedron 2005. [DOI: 10.1016/j.tet.2005.09.016] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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34
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Wipf P, Xiao J, Geib S. Imine Additions of Internal Alkynes for the Synthesis of Trisubstituted (E)-Alkene and Cyclopropane Peptide Isosteres. Adv Synth Catal 2005. [DOI: 10.1002/adsc.200505171] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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35
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McMath A, Guillaume D. Rapid synthesis of cyclopropane-dipeptide analogues. Nat Prod Res 2005; 19:639-43. [PMID: 16076632 DOI: 10.1080/14786410412331271988] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
The synthesis of cyclopropane-substituted nitrile-dipeptides is reported. The straightforward transformation of the nitrile function into an amide or methylketone function leads to dipeptide analogues of potentially interesting pharmacologic profile.
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36
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Abstract
Trisubstituted (E)-alkene isosteres (TEADIs) and novel cyclopropane amide bond isosteres (CPDIs) were synthesized by aldimine addition and three-component aldimine addition-cyclopropanation methodologies, respectively. These new peptide mimetics can serve as beta-turn promoters.
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Affiliation(s)
- Peter Wipf
- Department of Chemistry and Center for Chemical Methodologies & Library Development, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA.
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37
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Gnad F, Reiser O. Synthesis and applications of beta-aminocarboxylic acids containing a cyclopropane ring. Chem Rev 2003; 103:1603-23. [PMID: 12683791 DOI: 10.1021/cr010015v] [Citation(s) in RCA: 281] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Frieder Gnad
- Institut für Organische Chemie der Universität Regensburg, Universitätsstrasse 31, D-93053 Regensburg, Germany
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38
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Lebel H, Marcoux JF, Molinaro C, Charette AB. Stereoselective cyclopropanation reactions. Chem Rev 2003; 103:977-1050. [PMID: 12683775 DOI: 10.1021/cr010007e] [Citation(s) in RCA: 1428] [Impact Index Per Article: 68.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Hélène Lebel
- Département de Chimie, Université de Montréal, Montréal, Québec, Canada H3C 3J7
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39
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Design and synthesis of conformationally constrained, extended and reverse turn pseudopeptides as Grb2-SH2 domain antagonists. Tetrahedron Lett 2003. [DOI: 10.1016/s0040-4039(03)00013-3] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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40
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A comparative study on the 1,3-dipolar cycloadditions of diazomethane and bis(diisopropylamino)phosphinodiazomethane to chiral electron-deficient olefins: reactivity and diastereoselectivity. ACTA ACUST UNITED AC 2002. [DOI: 10.1016/s0957-4166(02)00714-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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41
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Ono S, Ogawa K, Yamashita K, Yamamoto T, Kazuta Y, Matsuda A, Shuto S. Conformational analysis of the NMDA receptor antagonist (1S,2R)-1-phenyl-2-[(S)-1-aminopropyl]-N,N-diethylcyclopropanecarboxamide (PPDC) designed by a novel conformational restriction method based on the structural feature of cyclopropane ring. Chem Pharm Bull (Tokyo) 2002; 50:966-8. [PMID: 12130856 DOI: 10.1248/cpb.50.966] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
(1S,2R)-1-phenyl-2-[(S)-1-aminopropyl]-N,N-diethylcyclopropanecarboxamide (2b, PPDC), a new class of potent N-methyl-D-aspartic acid (NMDA) receptor antagonist, was designed based on a new method for restricting the conformation of compounds having a cyclopropane ring. The three-dimensional structures of PPDC obtained by the three different methods of X-ray crystallographic analysis, usual MM2-calculations in vacuum, and MM2 calculations based on the nuclear Overhauser effect (NOE) data in D2O are similar, which are in accord with that hypothesized. These results suggest that this conformational restriction method is particularly effective in designing novel biologically active molecules.
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Affiliation(s)
- Sizuka Ono
- Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo, Japan
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42
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Müller P, Bernardinelli G, Nury P. Synthesis of bicyclo[3.2.2]nonadienones via enantioselective cyclopropanation of racemic cyclohexen-3-yl diazoacetate. ACTA ACUST UNITED AC 2002. [DOI: 10.1016/s0957-4166(02)00105-2] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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43
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Affiliation(s)
- F Fülöp
- Institute of Pharmaceutical Chemistry, University of Szeged, H-6701 Szeged, POB 121, Hungary.
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44
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Gosselin F, Tourwé D, Ceusters M, Meert T, Heylen L, Jurzak M, Lubell WD. Probing opioid receptor-ligand interactions by employment of indolizidin-9-one amino acid as a constrained Gly(2)-Gly(3) surrogate in a leucine-enkephalin mimic. THE JOURNAL OF PEPTIDE RESEARCH : OFFICIAL JOURNAL OF THE AMERICAN PEPTIDE SOCIETY 2001; 57:337-44. [PMID: 11328491 DOI: 10.1046/j.1397-002x.2000.00812.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
The relationship between the conformation and biological activity of Leu-enkephalin was studied using (2S,6R,8S)-9-oxo-8-N-(Boc)amino-1-azabicyclo[4.3.0]nonane-2-carboxylic acid [(2S,6R,8S)-1, I(9)AA] as a constrained Gly(2)-Gly(3) dipeptide surrogate. [I(9)AA](2,3)-Leu-enkephalin 12 was assembled using solid-phase peptide synthesis on Merrifield resin with TBTU as the coupling reagent. The in vitro assays indicated that [I(9)AA](2,3)-Leu-enkephalin 12 exhibited affinities for the mu- and delta-opioid receptors that were three orders of magnitude lower than that of Leu-enkephalin, as well as partial agonist character for both receptors. In in vivo assays for spinal analgesia, the indolizidinone analog 12 showed significantly enhanced duration of action, indicating an increased metabolic stability. Conformational analysis was performed using NMR and CD spectroscopy. The amide temperature coefficients and 3J(NH-CalphaH) coupling constants for 12 could not support a hydrogen-bonded beta-turn structure; however, its CD spectrum indicated a turn conformation. Incorporation of indolizidinone amino acid 1 into Leu-enkephalin thus provided additional support for the importance of a turn conformation for the biological activity of the native peptide.
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Affiliation(s)
- F Gosselin
- Département de chimie, Université de Montréal, C. P. 6128, Succursale Center Ville, Montréal, Québec, Canada
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45
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Davidson JP, Martin SF. Use of 1,2,3-trisubstituted cyclopropanes as conformationally constrained peptide mimics in SH2 antagonists. Tetrahedron Lett 2000. [DOI: 10.1016/s0040-4039(00)01611-7] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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46
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47
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Colacot TJ. An overview on the applications of ‘Doyle catalysts’ in asymmetric cyclopropanation, cyclopropenation and C-H insertion reactions. J CHEM SCI 2000. [DOI: 10.1007/bf02706172] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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