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Mashiko T, Shingai Y, Sakai J, Adachi S, Matsuzawa A, Kamo S, Sugita K. Enantioselective Total Syntheses of (+)-Ganocin A and (-)-Cochlearol B. Org Lett 2023; 25:8382-8386. [PMID: 37955425 DOI: 10.1021/acs.orglett.3c03572] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2023]
Abstract
Herein, we report the total syntheses of (+)-ganocin A and (-)-cochlearol B, featuring pentacyclic skeletons, in optically active forms. We utilized asymmetric Corey-Bakshi-Shibata reduction, phenolic oxidative cyclization, the intramolecular radical cyclization-benzylic oxidative cyclization sequence, and intramolecular [2 + 2] photocycloaddition. These key steps enabled enantioselective access with the longest linear sequence of 17 steps and 9% overall yield for (+)-ganocin A and with 16 steps and 9% overall yield for (-)-cohlearol B.
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Affiliation(s)
- Tomoya Mashiko
- Department of Synthetic Medicinal Chemistry, Faculty of Pharmaceutical Sciences, Hoshi University, 2-4-41 Ebara, Shinagawa-ku, Tokyo 142-8501, Japan
| | - Yuta Shingai
- Department of Synthetic Medicinal Chemistry, Faculty of Pharmaceutical Sciences, Hoshi University, 2-4-41 Ebara, Shinagawa-ku, Tokyo 142-8501, Japan
| | - Jun Sakai
- Department of Synthetic Medicinal Chemistry, Faculty of Pharmaceutical Sciences, Hoshi University, 2-4-41 Ebara, Shinagawa-ku, Tokyo 142-8501, Japan
| | - Shinya Adachi
- Department of Synthetic Medicinal Chemistry, Faculty of Pharmaceutical Sciences, Hoshi University, 2-4-41 Ebara, Shinagawa-ku, Tokyo 142-8501, Japan
| | - Akinobu Matsuzawa
- Department of Synthetic Medicinal Chemistry, Faculty of Pharmaceutical Sciences, Hoshi University, 2-4-41 Ebara, Shinagawa-ku, Tokyo 142-8501, Japan
| | - Shogo Kamo
- Department of Synthetic Medicinal Chemistry, Faculty of Pharmaceutical Sciences, Hoshi University, 2-4-41 Ebara, Shinagawa-ku, Tokyo 142-8501, Japan
| | - Kazuyuki Sugita
- Department of Synthetic Medicinal Chemistry, Faculty of Pharmaceutical Sciences, Hoshi University, 2-4-41 Ebara, Shinagawa-ku, Tokyo 142-8501, Japan
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2
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Mashiko T, Shingai Y, Sakai J, Kamo S, Adachi S, Matsuzawa A, Sugita K. Total Synthesis of Cochlearol B via Intramolecular [2+2] Photocycloaddition. Angew Chem Int Ed Engl 2021; 60:24484-24487. [PMID: 34533883 DOI: 10.1002/anie.202110556] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Revised: 09/15/2021] [Indexed: 11/12/2022]
Abstract
Herein, we describe the first total synthesis of cochlearol B, a meroterpenoid natural product featuring a 4/5/6/6/6-fused pentacyclic structure. Key steps, oxidative cyclization and subsequent intramolecular [2+2] photocycloaddition, which constructed the pentacyclic structure in highly stereoselective manner, allowed efficient access to cochlearol B with the longest linear sequence of 16 steps, and in 9 % overall yield. Single-crystal X-ray crystallographic analysis clearly confirmed the stereochemistry of cochlearol B.
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Affiliation(s)
- Tomoya Mashiko
- Department of Synthetic Medicinal Chemistry, Faculty of Pharmaceutical Sciences, Hoshi University, 2-4-41 Ebara, Shinagawa-ku, Tokyo, 142-8501, Japan
| | - Yuta Shingai
- Department of Synthetic Medicinal Chemistry, Faculty of Pharmaceutical Sciences, Hoshi University, 2-4-41 Ebara, Shinagawa-ku, Tokyo, 142-8501, Japan
| | - Jun Sakai
- Department of Synthetic Medicinal Chemistry, Faculty of Pharmaceutical Sciences, Hoshi University, 2-4-41 Ebara, Shinagawa-ku, Tokyo, 142-8501, Japan
| | - Shogo Kamo
- Department of Synthetic Medicinal Chemistry, Faculty of Pharmaceutical Sciences, Hoshi University, 2-4-41 Ebara, Shinagawa-ku, Tokyo, 142-8501, Japan
| | - Shinya Adachi
- Department of Synthetic Medicinal Chemistry, Faculty of Pharmaceutical Sciences, Hoshi University, 2-4-41 Ebara, Shinagawa-ku, Tokyo, 142-8501, Japan
| | - Akinobu Matsuzawa
- Department of Synthetic Medicinal Chemistry, Faculty of Pharmaceutical Sciences, Hoshi University, 2-4-41 Ebara, Shinagawa-ku, Tokyo, 142-8501, Japan
| | - Kazuyuki Sugita
- Department of Synthetic Medicinal Chemistry, Faculty of Pharmaceutical Sciences, Hoshi University, 2-4-41 Ebara, Shinagawa-ku, Tokyo, 142-8501, Japan
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3
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Mashiko T, Shingai Y, Sakai J, Kamo S, Adachi S, Matsuzawa A, Sugita K. Total Synthesis of Cochlearol B via Intramolecular [2+2] Photocycloaddition. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202110556] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Tomoya Mashiko
- Department of Synthetic Medicinal Chemistry Faculty of Pharmaceutical Sciences Hoshi University 2-4-41 Ebara, Shinagawa-ku Tokyo 142-8501 Japan
| | - Yuta Shingai
- Department of Synthetic Medicinal Chemistry Faculty of Pharmaceutical Sciences Hoshi University 2-4-41 Ebara, Shinagawa-ku Tokyo 142-8501 Japan
| | - Jun Sakai
- Department of Synthetic Medicinal Chemistry Faculty of Pharmaceutical Sciences Hoshi University 2-4-41 Ebara, Shinagawa-ku Tokyo 142-8501 Japan
| | - Shogo Kamo
- Department of Synthetic Medicinal Chemistry Faculty of Pharmaceutical Sciences Hoshi University 2-4-41 Ebara, Shinagawa-ku Tokyo 142-8501 Japan
| | - Shinya Adachi
- Department of Synthetic Medicinal Chemistry Faculty of Pharmaceutical Sciences Hoshi University 2-4-41 Ebara, Shinagawa-ku Tokyo 142-8501 Japan
| | - Akinobu Matsuzawa
- Department of Synthetic Medicinal Chemistry Faculty of Pharmaceutical Sciences Hoshi University 2-4-41 Ebara, Shinagawa-ku Tokyo 142-8501 Japan
| | - Kazuyuki Sugita
- Department of Synthetic Medicinal Chemistry Faculty of Pharmaceutical Sciences Hoshi University 2-4-41 Ebara, Shinagawa-ku Tokyo 142-8501 Japan
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4
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Shimazaki Y, Wata C, Hashimoto T, Maruoka K. Enantioselective Hydrative
para‐
Dearomatization of Sulfonanilides by an Indanol‐based Chiral Organoiodine Catalyst. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100152] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Yuto Shimazaki
- Department of Chemistry Graduate School of Science Kyoto University 606-8502 Kyoto Sakyo Japan
| | - Chisato Wata
- Chiba Iodine Resource Innovation Center and Department of Chemistry, Graduate School of Science Chiba University 1–33, Yayoi, Inage 263-8522 Chiba Japan
| | - Takuya Hashimoto
- Chiba Iodine Resource Innovation Center and Department of Chemistry, Graduate School of Science Chiba University 1–33, Yayoi, Inage 263-8522 Chiba Japan
| | - Keiji Maruoka
- Department of Chemistry Graduate School of Science Kyoto University 606-8502 Kyoto Sakyo Japan
- School of Chemical Engineering and Light Industry Guangdong University of Technology 510006 Guangzhou Panyu District P. R. China
- Graduate School of Pharmaceutical Sciences Kyoto University 606-8501 Kyoto Sakyo Japan
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5
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Sabot C, Mabrouki A, Le Nahenec-Martel P, Kriaa A, Hedhli A, Renard PY. Dearomatization of a 3-Hydroxypyridine Through an Unexpected Oxidative Deformylation Process: An Entry to Azacyclohexadienones. Synlett 2020. [DOI: 10.1055/s-0040-1706870] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Phenols are well-known precursors of cyclohexadienones, which have widespread applications in organic synthesis. In contrast, their hydroxypyridine counterparts have not been explored yet. An unprecedented oxidative dearomatization of a 3-hydroxypyridine involving an unexpected deformylation step is reported. The chemical reactivity of the resulting unreported azacyclohexadiene-type compound was also explored.
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Affiliation(s)
- Cyrille Sabot
- Normandie Univ, CNRS, UNIROUEN, INSA Rouen, COBRA (UMR 6014)
| | - Afef Mabrouki
- Laboratory of Molecular Organic Chemistry, National Higher Engineering School of Tunis
| | | | - Abdelkader Kriaa
- Laboratory of Molecular Organic Chemistry, National Higher Engineering School of Tunis
| | - Ahmed Hedhli
- Laboratory of Molecular Organic Chemistry, National Higher Engineering School of Tunis
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6
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Gomes RC, Sakata RP, Almeida WP, Coelho F. Spirocyclohexadienones as an Uncommon Scaffold for Acetylcholinesterase Inhibitory Activity. Med Chem 2019; 15:373-382. [PMID: 30411689 DOI: 10.2174/1573406414666181109114214] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2018] [Revised: 10/04/2018] [Accepted: 10/30/2018] [Indexed: 01/14/2023]
Abstract
BACKGROUND The most important cause of dementia affecting elderly people is the Alzheimer's disease (AD). Patients affected by this progressive and neurodegenerative disease have severe memory and cognitive function impairments. Some medicines used for treating this disease in the early stages are based on inhibition of acetylcholinesterase. Population aging should contribute to increase the cases of patients suffering from Alzheimer's disease, thus requiring the development of new therapeutic entities for the treatment of this disease. METHODS The objective of this work is to identify new substances that have spatial structural similarity with donepezil, an efficient commercial drug used for the treatment of Alzheimer's disease, and to evaluate the capacity of inhibition of these new substances against the enzyme acetylcholinesterase. RESULTS Based on a previous results of our group, we prepared a set of 11 spirocyclohexadienones with different substitutions patterns in three steps and overall yield of up to 59%. These compounds were evaluated in vitro against acetylcholinesterase. We found that eight of them are able to inhibit the acetylcholinesterase activity, with IC50 values ranging from 0.12 to 12.67 µM. Molecular docking study indicated that the spirocyclohexadienone, 9e (IC50 = 0.12 µM), a mixedtype AChE inhibitor, showed a good interaction at active site of the enzyme, including the cationic (CAS) and the peripheral site (PAS). CONCLUSION We described the first study aimed at investigating the biological properties of spirocyclohexadienones as acetylcholinesterase inhibitors. Thus, we have identified an inhibitor, which provided valuable insights for further studies aimed at the discovery of more potent acetylcholinesterase inhibitors.
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Affiliation(s)
- Ralph C Gomes
- LaboratOrio de SIntese de Produtos Naturais e Farmacos - Institute of Chemistry, University of Campinas, PO Box 6154 - 13083-970 - Campinas, SP, Brazil
| | - Renata P Sakata
- LaboratOrio de SIntese de Produtos Naturais e Farmacos - Institute of Chemistry, University of Campinas, PO Box 6154 - 13083-970 - Campinas, SP, Brazil
| | - Wanda P Almeida
- LaboratOrio de SIntese de Produtos Naturais e Farmacos - Institute of Chemistry, University of Campinas, PO Box 6154 - 13083-970 - Campinas, SP, Brazil.,Faculty of Pharmaceutical Sciences, University of Campinas, PO Box 6029 - 13083-871, Campinas, SP - Brazil
| | - Fernando Coelho
- LaboratOrio de SIntese de Produtos Naturais e Farmacos - Institute of Chemistry, University of Campinas, PO Box 6154 - 13083-970 - Campinas, SP, Brazil
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7
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Maertens G, Canesi S. Synthesis of theStrychnosAlkaloid (−)-Strychnopivotine and Confirmation of its Absolute Configuration. Chemistry 2016; 22:7090-3. [DOI: 10.1002/chem.201601319] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2016] [Indexed: 12/17/2022]
Affiliation(s)
- Gaëtan Maertens
- Laboratoire de Méthodologie et Synthèse de; Produit Naturels; Université du Québec à Montréal, C.P.8888, Succ. Centre-Ville; Montréal H3C 3P8 Québec Canada
| | - Sylvain Canesi
- Laboratoire de Méthodologie et Synthèse de; Produit Naturels; Université du Québec à Montréal, C.P.8888, Succ. Centre-Ville; Montréal H3C 3P8 Québec Canada
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8
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Shirley HJ, Bray CD. Spiroketal Formation by Cascade Oxidative Dearomatization: An Approach to the Phorbaketal Skeleton. European J Org Chem 2016. [DOI: 10.1002/ejoc.201501370] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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9
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Waghmode NA, Kalbandhe AH, Thorat PB, Karade NN. Metal-free new synthesis of 1,3-naphthoxazines via intramolecular cross dehydrogenative-coupling reaction of 1-(α-aminoalkyl)-2-naphthols using hypervalent iodine(III) reagent. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2015.12.117] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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10
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Guérard KC, Hamel V, Guérinot A, Bouchard-Aubin C, Canesi S. Formation of the Main Cores Present in Natural Products by Tandem Additions. Chemistry 2015; 21:18068-71. [PMID: 26455585 DOI: 10.1002/chem.201502920] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2015] [Indexed: 11/12/2022]
Abstract
A rapid route to 5,5- and 5,6- bicyclic systems is provided by an 1,3-alkyl-shift process mediated by a hypervalent iodine reagent on aromatics. The structures obtained contain several unsaturations with different behaviors and reactivities. Such diversity allows further elaborations for the rapid formation of compact systems present in a variety of natural products. The potential for further transformations has been demonstrated by performing a double Michael addition. This cyclization process is regio- and stereoselective due to the presence of a former benzylic substituent. Furthermore, an extension of this approach has been accomplished on indole derivatives.
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Affiliation(s)
- Kimiaka C Guérard
- Département de chimie, Université du Québec à Montréal, Laboratoire de Méthodologie et Synthèse de Produits Naturels, C.P.8888, Succ. Centre-Ville, Montréal, H3C 3P8, Québec (Canada)
| | - Vincent Hamel
- Département de chimie, Université du Québec à Montréal, Laboratoire de Méthodologie et Synthèse de Produits Naturels, C.P.8888, Succ. Centre-Ville, Montréal, H3C 3P8, Québec (Canada)
| | - Amandine Guérinot
- Département de chimie, Université du Québec à Montréal, Laboratoire de Méthodologie et Synthèse de Produits Naturels, C.P.8888, Succ. Centre-Ville, Montréal, H3C 3P8, Québec (Canada)
| | - Cloé Bouchard-Aubin
- Département de chimie, Université du Québec à Montréal, Laboratoire de Méthodologie et Synthèse de Produits Naturels, C.P.8888, Succ. Centre-Ville, Montréal, H3C 3P8, Québec (Canada)
| | - Sylvain Canesi
- Département de chimie, Université du Québec à Montréal, Laboratoire de Méthodologie et Synthèse de Produits Naturels, C.P.8888, Succ. Centre-Ville, Montréal, H3C 3P8, Québec (Canada).
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11
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Yusubov MS, Zhdankin VV. Iodine catalysis: A green alternative to transition metals in organic chemistry and technology. RESOURCE-EFFICIENT TECHNOLOGIES 2015. [DOI: 10.1016/j.reffit.2015.06.001] [Citation(s) in RCA: 77] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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12
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Jacquemot G, Maertens G, Canesi S. Isostrychnine Synthesis Mediated by Hypervalent Iodine Reagent. Chemistry 2015; 21:7713-5. [DOI: 10.1002/chem.201500185] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2015] [Indexed: 12/24/2022]
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13
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Zhu M, Zhao Y. A convenient catalytic oxidative 1,2-shift of arylalkenes for preparation of α-aryl ketones mediated by NaI. CHINESE CHEM LETT 2015. [DOI: 10.1016/j.cclet.2014.11.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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14
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Maertens G, L'Homme C, Canesi S. Total synthesis of natural products using hypervalent iodine reagents. Front Chem 2015; 2:115. [PMID: 25601909 PMCID: PMC4283662 DOI: 10.3389/fchem.2014.00115] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2014] [Accepted: 12/10/2014] [Indexed: 12/16/2022] Open
Abstract
We present a review of natural product syntheses accomplished in our laboratory during the last 5 years. Each synthetic route features a phenol dearomatization promoted by an environmentally benign hypervalent iodine reagent. The dearomatizations demonstrate the "aromatic ring umpolung" concept, and involve stereoselective remodeling of the inert unsaturations of a phenol into a highly functionalized key intermediate that may contain a quaternary carbon center and a prochiral dienone system. Several new oxidative strategies were employed, including transpositions (1,3-alkyl shift and Prins-pinacol), a polycyclization, an ipso rearrangement, and direct nucleophilic additions at the phenol para position. Several alkaloids, heterocyclic compounds, and a polycyclic core have been achieved, including sceletenone (a serotonin reuptake inhibitor), acetylaspidoalbidine (an antitumor agent), fortucine (antiviral and antitumor), erysotramidine (curare-like effect), platensimycin (an antibiotic), and the main core of a kaurane diterpene (immunosuppressive agent and stimulator of apoptosis). These concise and in some cases enantioselective syntheses effectively demonstrate the importance of hypervalent iodine reagents in the total synthesis of bioactive natural products.
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Affiliation(s)
| | | | - Sylvain Canesi
- Laboratoire de Méthodologie et Synthèse de Produits Naturels, Département de Chimie, Université du Québec à MontréalMontréal, QC, Canada
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15
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Desjardins S, Maertens G, Canesi S. Asymmetric Synthesis of the Main Core of Kaurane Family Members Triggered by an Oxidative Polycyclization–Pinacol Tandem Process. Org Lett 2014; 16:4928-31. [DOI: 10.1021/ol5024486] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Samuel Desjardins
- Laboratoire de Méthodologie
et Synthèse de Produits Naturels, Université du Québec à Montréal, C.P. 8888, Succ. Centre-Ville, Montréal, H3C 3P8, Québec, Canada
| | - Gaëtan Maertens
- Laboratoire de Méthodologie
et Synthèse de Produits Naturels, Université du Québec à Montréal, C.P. 8888, Succ. Centre-Ville, Montréal, H3C 3P8, Québec, Canada
| | - Sylvain Canesi
- Laboratoire de Méthodologie
et Synthèse de Produits Naturels, Université du Québec à Montréal, C.P. 8888, Succ. Centre-Ville, Montréal, H3C 3P8, Québec, Canada
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16
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L’Homme C, Ménard MA, Canesi S. Synthesis of the Erythrina Alkaloid Erysotramidine. J Org Chem 2014; 79:8481-5. [DOI: 10.1021/jo501583c] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Chloé L’Homme
- Laboratoire
de Méthodologie
et Synthèse de Produits Naturels, Université du Québec à Montréal, C.P. 8888, Succ. Centre-Ville, Montréal, H3C 3P8 Québec, Canada
| | - Marc-André Ménard
- Laboratoire
de Méthodologie
et Synthèse de Produits Naturels, Université du Québec à Montréal, C.P. 8888, Succ. Centre-Ville, Montréal, H3C 3P8 Québec, Canada
| | - Sylvain Canesi
- Laboratoire
de Méthodologie
et Synthèse de Produits Naturels, Université du Québec à Montréal, C.P. 8888, Succ. Centre-Ville, Montréal, H3C 3P8 Québec, Canada
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17
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Beaulieu M, Ottenwaelder X, Canesi S. Asymmetric Synthesis of Fortucine and Reassignment of Its Absolute Configuration. Chemistry 2014; 20:7581-4. [DOI: 10.1002/chem.201402323] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2014] [Indexed: 11/09/2022]
Affiliation(s)
- Marc‐André Beaulieu
- Département de chimie, Université du Québec à Montréal, Laboratoire de Méthodologie et Synthèse de Produits Naturels, C.P.8888, Succ. Centre‐Ville, Montréal, QC, H3C 3P8 (Canada), Fax: (+1) 514‐987‐4054
| | - Xavier Ottenwaelder
- Department of Chemistry and Biochemistry, Concordia University, 7141 Sherbrooke W, Montreal, QC, H4B 1R6 (Canada)
| | - Sylvain Canesi
- Département de chimie, Université du Québec à Montréal, Laboratoire de Méthodologie et Synthèse de Produits Naturels, C.P.8888, Succ. Centre‐Ville, Montréal, QC, H3C 3P8 (Canada), Fax: (+1) 514‐987‐4054
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18
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Zheng Z, Ma S, Tang L, Zhang-Negrerie D, Du Y, Zhao K. PhI(OCOCF3)2-Mediated Intramolecular Oxidative N–N Bond Formation: Metal-Free Synthesis of 1,2,4-Triazolo[1,5-a]pyridines. J Org Chem 2014; 79:4687-93. [DOI: 10.1021/jo500298j] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Zisheng Zheng
- Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency, School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, China
| | - Shuangyu Ma
- Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency, School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, China
| | - Linlin Tang
- Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency, School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, China
| | - Daisy Zhang-Negrerie
- Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency, School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, China
| | - Yunfei Du
- Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency, School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China
| | - Kang Zhao
- Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency, School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, China
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19
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Zheng Z, Zhang-Negrerie D, Du Y, Zhao K. The applications of hypervalent iodine(III) reagents in the constructions of heterocyclic compounds through oxidative coupling reactions. Sci China Chem 2013. [DOI: 10.1007/s11426-013-5043-1] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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20
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An efficient chlorination of aromatic compounds using a catalytic amount of iodobenzene. CHINESE CHEM LETT 2013. [DOI: 10.1016/j.cclet.2013.03.049] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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21
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Jacquemot G, Ménard MA, L'Homme C, Canesi S. Oxidative cycloaddition and cross-coupling processes on unactivated benzene derivatives. Chem Sci 2013. [DOI: 10.1039/c2sc22318j] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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22
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Jacquemot G, Canesi S. Oxidative ipso-Rearrangement Performed by a Hypervalent Iodine Reagent and Its Application. J Org Chem 2012; 77:7588-94. [DOI: 10.1021/jo301408j] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Guillaume Jacquemot
- Laboratoire de Méthodologie
et Synthèse
de Produits Naturels, Université du Québec à Montréal, C.P. 8888, Succ. Centre-Ville,
Montréal, H3C 3P8 Québec, Canada
| | - Sylvain Canesi
- Laboratoire de Méthodologie
et Synthèse
de Produits Naturels, Université du Québec à Montréal, C.P. 8888, Succ. Centre-Ville,
Montréal, H3C 3P8 Québec, Canada
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23
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Lunazzi L, Mancinelli M, Mazzanti A. Atropisomers of Hindered Triarylisocyanurates: Structure, Conformation, Stereodynamics, and Absolute Configuration. J Org Chem 2012; 77:3373-80. [DOI: 10.1021/jo300192n] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Lodovico Lunazzi
- Department of Organic Chemistry “A.
Mangini”, University of Bologna,
Viale Risorgimento 4, I-40136
Bologna, Italy
| | - Michele Mancinelli
- Department of Organic Chemistry “A.
Mangini”, University of Bologna,
Viale Risorgimento 4, I-40136
Bologna, Italy
| | - Andrea Mazzanti
- Department of Organic Chemistry “A.
Mangini”, University of Bologna,
Viale Risorgimento 4, I-40136
Bologna, Italy
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Guérard KC, Guérinot A, Bouchard-Aubin C, Ménard MA, Lepage M, Beaulieu MA, Canesi S. Oxidative 1,2- and 1,3-Alkyl Shift Processes: Developments and Applications in Synthesis. J Org Chem 2012; 77:2121-33. [DOI: 10.1021/jo300169k] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kimiaka C. Guérard
- Laboratoire de Méthodologie et Synthèse de
Produits Naturels, Université du Québec à Montréal, C.P. 8888, Succ. Centre-Ville,
Montréal, H3C 3P8 Quebec, Canada
| | - Amandine Guérinot
- Laboratoire de Méthodologie et Synthèse de
Produits Naturels, Université du Québec à Montréal, C.P. 8888, Succ. Centre-Ville,
Montréal, H3C 3P8 Quebec, Canada
| | - Cloé Bouchard-Aubin
- Laboratoire de Méthodologie et Synthèse de
Produits Naturels, Université du Québec à Montréal, C.P. 8888, Succ. Centre-Ville,
Montréal, H3C 3P8 Quebec, Canada
| | - Marc-André Ménard
- Laboratoire de Méthodologie et Synthèse de
Produits Naturels, Université du Québec à Montréal, C.P. 8888, Succ. Centre-Ville,
Montréal, H3C 3P8 Quebec, Canada
| | - Mathieu Lepage
- Laboratoire de Méthodologie et Synthèse de
Produits Naturels, Université du Québec à Montréal, C.P. 8888, Succ. Centre-Ville,
Montréal, H3C 3P8 Quebec, Canada
| | - Marc André Beaulieu
- Laboratoire de Méthodologie et Synthèse de
Produits Naturels, Université du Québec à Montréal, C.P. 8888, Succ. Centre-Ville,
Montréal, H3C 3P8 Quebec, Canada
| | - Sylvain Canesi
- Laboratoire de Méthodologie et Synthèse de
Produits Naturels, Université du Québec à Montréal, C.P. 8888, Succ. Centre-Ville,
Montréal, H3C 3P8 Quebec, Canada
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25
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Beaulieu MA, Guérard KC, Maertens G, Sabot C, Canesi S. Oxidative Prins-Pinacol Tandem Process Mediated by a Hypervalent Iodine Reagent: Scope, Limitations, and Applications. J Org Chem 2011; 76:9460-71. [DOI: 10.1021/jo2019027] [Citation(s) in RCA: 66] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Marc-André Beaulieu
- Laboratoire de Méthodologie et Synthèse
de Produits Naturels, Université du Québec à Montréal, C.P. 8888, Succ. Centre-Ville,
Montréal, H3C 3P8 Québec, Canada
| | - Kimiaka C. Guérard
- Laboratoire de Méthodologie et Synthèse
de Produits Naturels, Université du Québec à Montréal, C.P. 8888, Succ. Centre-Ville,
Montréal, H3C 3P8 Québec, Canada
| | - Gaëtan Maertens
- Laboratoire de Méthodologie et Synthèse
de Produits Naturels, Université du Québec à Montréal, C.P. 8888, Succ. Centre-Ville,
Montréal, H3C 3P8 Québec, Canada
| | - Cyrille Sabot
- Laboratoire de Méthodologie et Synthèse
de Produits Naturels, Université du Québec à Montréal, C.P. 8888, Succ. Centre-Ville,
Montréal, H3C 3P8 Québec, Canada
| | - Sylvain Canesi
- Laboratoire de Méthodologie et Synthèse
de Produits Naturels, Université du Québec à Montréal, C.P. 8888, Succ. Centre-Ville,
Montréal, H3C 3P8 Québec, Canada
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Desjardins S, Andrez JC, Canesi S. A Stereoselective Oxidative Polycyclization Process Mediated by a Hypervalent Iodine Reagent. Org Lett 2011; 13:3406-9. [DOI: 10.1021/ol201149u] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Samuel Desjardins
- Laboratoire de Méthodologie et Synthèse de Produits Naturels, Université du Québec à Montréal, C.P. 8888, Succ. Centre-Ville, Montréal, H3C 3P8, Québec, Canada
| | - Jean-Christophe Andrez
- Laboratoire de Méthodologie et Synthèse de Produits Naturels, Université du Québec à Montréal, C.P. 8888, Succ. Centre-Ville, Montréal, H3C 3P8, Québec, Canada
| | - Sylvain Canesi
- Laboratoire de Méthodologie et Synthèse de Produits Naturels, Université du Québec à Montréal, C.P. 8888, Succ. Centre-Ville, Montréal, H3C 3P8, Québec, Canada
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Traoré M, Maynadier M, Souard F, Choisnard L, Vial H, Wong YS. Forming spirocyclohexadienone-oxocarbenium cation species in the biomimetic synthesis of amomols. J Org Chem 2011; 76:1409-17. [PMID: 21250723 DOI: 10.1021/jo102414s] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The oxidation of appropriate 2-(4-hydroxyphenyl)ethyl ketones gives direct access to amomols by means of the formation of a transient spirocyclohexadienone-oxocarbenium ion that is intermolecularly intercepted by an alcohol. Furthermore, homochiral amomols and other new analogues were synthesized for the first time and were biologically evaluated on Plasmodium falciparum.
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Affiliation(s)
- Mariam Traoré
- Département de Pharmacochimie Moléculaire, Université Joseph Fourier-Grenoble 1, CNRS UMR 5063, CNRS ICMG FR 2607, bâtiment André Rassat, 470 rue de la Chimie, F-38041 Grenoble Cedex 9, France
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28
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Ye Y, Fan R. Silver-catalyzed synthesis of 4-substituted benzofuransvia a cascade oxidative coupling-annulation protocol. Chem Commun (Camb) 2011; 47:5626-8. [DOI: 10.1039/c1cc10137d] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A facile synthesis of 4-indole benzofurans via an oxidative dearomatization, a silver-catalyzed cascade Michael addition-annulation, and an aromatization is reported.
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Affiliation(s)
- Yang Ye
- Department of Chemistry
- Fudan University
- Shanghai
- China
| | - Renhua Fan
- Department of Chemistry
- Fudan University
- Shanghai
- China
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30
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Beaulieu MA, Sabot C, Achache N, Guérard KC, Canesi S. An Oxidative Prins-Pinacol Tandem Process and its Application to the synthesis of (−)-Platensimycin. Chemistry 2010; 16:11224-8. [DOI: 10.1002/chem.201001813] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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