1
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Jin Y, Li M, Liu M, Ge Q, Cong H, Tao Z. Cucurbit[7]uril‐Catalyzed Controllable Pinacol Rearrangement with Activated Hydride Migration. European J Org Chem 2022. [DOI: 10.1002/ejoc.202101446] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Ye Jin
- Guizhou University Enterprise Technology Center of Guizhou Province CHINA
| | - Min Li
- Guizhou University Enterprise Technology Center of Guizhou Province CHINA
| | - Mao Liu
- Guizhou University Enterprise Technology Center of Guizhou Province CHINA
| | - Qingmei Ge
- Guizhou University Enterprise Technology Center of Guizhou Province Huaxi district 550025 Guiyang CHINA
| | - Hang Cong
- Guizhou University Enterprise Technology Center of Guizhou Province CHINA
| | - Zhu Tao
- Guizhou University Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province CHINA
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Zong Y, Xu Z, Zhu R, Su A, Liu X, Zhu M, Han J, Zhang J, Xu Y, Lou H. Enantioselective Total Syntheses of Manginoids A and C and Guignardones A and C. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202104182] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Yan Zong
- Department of Natural Products Chemistry Key Lab of Chemical Biology School of Pharmaceutical Sciences Shandong University Jinan 250012 China
| | - Ze‐Jun Xu
- Department of Natural Products Chemistry Key Lab of Chemical Biology School of Pharmaceutical Sciences Shandong University Jinan 250012 China
| | - Rong‐Xiu Zhu
- Department of Natural Products Chemistry Key Lab of Chemical Biology School of Pharmaceutical Sciences Shandong University Jinan 250012 China
- School of Chemistry and Chemical Engineering Shandong University Jinan 250100 China
| | - Ai‐Hong Su
- Department of Natural Products Chemistry Key Lab of Chemical Biology School of Pharmaceutical Sciences Shandong University Jinan 250012 China
| | - Xu‐Yuan Liu
- Department of Natural Products Chemistry Key Lab of Chemical Biology School of Pharmaceutical Sciences Shandong University Jinan 250012 China
| | - Ming‐Zhu Zhu
- Department of Natural Products Chemistry Key Lab of Chemical Biology School of Pharmaceutical Sciences Shandong University Jinan 250012 China
| | - Jing‐Jing Han
- Department of Natural Products Chemistry Key Lab of Chemical Biology School of Pharmaceutical Sciences Shandong University Jinan 250012 China
| | - Jiao‐Zhen Zhang
- Department of Natural Products Chemistry Key Lab of Chemical Biology School of Pharmaceutical Sciences Shandong University Jinan 250012 China
| | - Yu‐Liang Xu
- Department of Natural Products Chemistry Key Lab of Chemical Biology School of Pharmaceutical Sciences Shandong University Jinan 250012 China
| | - Hong‐Xiang Lou
- Department of Natural Products Chemistry Key Lab of Chemical Biology School of Pharmaceutical Sciences Shandong University Jinan 250012 China
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Zong Y, Xu ZJ, Zhu RX, Su AH, Liu XY, Zhu MZ, Han JJ, Zhang JZ, Xu YL, Lou HX. Enantioselective Total Syntheses of Manginoids A and C and Guignardones A and C. Angew Chem Int Ed Engl 2021; 60:15286-15290. [PMID: 33876516 DOI: 10.1002/anie.202104182] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Revised: 04/19/2021] [Indexed: 12/23/2022]
Abstract
An enantioselective synthetic approach for preparing manginoids and guignardones, two types of biogenetically related meroterpenoids, is reported. This bioinspired and divergent synthesis employs an oxidative 1,3-dicarbonyl radical-initiated cyclization and cyclodehydration of the common precursor to forge the central ring of the manginoids and guignardones, respectively, at a late stage. Key synthetic steps include silica-gel-promoted semipinacol rearrangement to form the 6-oxabicyclo[3.2.1]octane skeleton and the Suzuki-Miyaura reaction of vinyl bromide to achieve fragment coupling. This synthesis protocol enables the asymmetric syntheses of four fungal meroterpenoids from commercially available materials.
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Affiliation(s)
- Yan Zong
- Department of Natural Products Chemistry, Key Lab of Chemical Biology, School of Pharmaceutical Sciences, Shandong University, Jinan, 250012, China
| | - Ze-Jun Xu
- Department of Natural Products Chemistry, Key Lab of Chemical Biology, School of Pharmaceutical Sciences, Shandong University, Jinan, 250012, China
| | - Rong-Xiu Zhu
- Department of Natural Products Chemistry, Key Lab of Chemical Biology, School of Pharmaceutical Sciences, Shandong University, Jinan, 250012, China.,School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100, China
| | - Ai-Hong Su
- Department of Natural Products Chemistry, Key Lab of Chemical Biology, School of Pharmaceutical Sciences, Shandong University, Jinan, 250012, China
| | - Xu-Yuan Liu
- Department of Natural Products Chemistry, Key Lab of Chemical Biology, School of Pharmaceutical Sciences, Shandong University, Jinan, 250012, China
| | - Ming-Zhu Zhu
- Department of Natural Products Chemistry, Key Lab of Chemical Biology, School of Pharmaceutical Sciences, Shandong University, Jinan, 250012, China
| | - Jing-Jing Han
- Department of Natural Products Chemistry, Key Lab of Chemical Biology, School of Pharmaceutical Sciences, Shandong University, Jinan, 250012, China
| | - Jiao-Zhen Zhang
- Department of Natural Products Chemistry, Key Lab of Chemical Biology, School of Pharmaceutical Sciences, Shandong University, Jinan, 250012, China
| | - Yu-Liang Xu
- Department of Natural Products Chemistry, Key Lab of Chemical Biology, School of Pharmaceutical Sciences, Shandong University, Jinan, 250012, China
| | - Hong-Xiang Lou
- Department of Natural Products Chemistry, Key Lab of Chemical Biology, School of Pharmaceutical Sciences, Shandong University, Jinan, 250012, China
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Zuo HD, Cui CC, Guo C, Hao WJ, Tu SJ, Jiang B. Metal-Catalyzed Spiroannulation-Fluoromethylfunctionaliztions of 1,5-Enynes for the Synthesis of Stereodefined (Z)-Spiroindenes. Chem Asian J 2020; 15:4070-4076. [PMID: 33016006 DOI: 10.1002/asia.202000954] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Revised: 10/02/2020] [Indexed: 12/12/2022]
Abstract
Two classes of new catalytic spiroannulation-fluormethylfunctionaliztions of para-quinone methide (p-QM)-containing 1,5-enynes have been established under redox-neutral conditions. Palladium-catalyzed spiroannulation-iododifluoromethylation with ethyl difluoroiodoacetate oriented completely stereoselective access to (Z)-spiroindenes and the latter included copper-catalyzed three-component spiroannulation-cyanotrifluoromethylation starting from Togni's reagent and trimethylsilanecarbonitrile (TMSCN). Both reaction pathways involve fluoroalkyl radical-triggered 1,6-addition/5-exo-dig annulation/metal radical cross-coupling/reductive elimination sequence, providing practical and stereoselective protocols for rapidly constructing cyclohexadienone-containing spiroindenes with generally good yields.
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Affiliation(s)
- Hang-Dong Zuo
- College of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing, 211816, P. R. China.,School of Chemistry & Materials Science, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou, 221116, P. R. China
| | - Chen-Chang Cui
- School of Chemistry & Materials Science, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou, 221116, P. R. China
| | - Cheng Guo
- College of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing, 211816, P. R. China
| | - Wen-Juan Hao
- School of Chemistry & Materials Science, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou, 221116, P. R. China
| | - Shu-Jiang Tu
- School of Chemistry & Materials Science, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou, 221116, P. R. China
| | - Bo Jiang
- School of Chemistry & Materials Science, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou, 221116, P. R. China
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Romero KJ, Galliher MS, Raycroft MAR, Chauvin JPR, Bosque I, Pratt DA, Stephenson CRJ. Electrochemical Dimerization of Phenylpropenoids and the Surprising Antioxidant Activity of the Resultant Quinone Methide Dimers. Angew Chem Int Ed Engl 2018; 57:17125-17129. [PMID: 30474921 DOI: 10.1002/anie.201810870] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2018] [Indexed: 12/12/2022]
Abstract
A simple method for the dimerization of phenylpropenoid derivatives is reported. It leverages electrochemical oxidation of p-unsaturated phenols to access the dimeric materials in a biomimetic fashion. The mild nature of the transformation provides excellent functional group tolerance, resulting in a unified approach for the synthesis of a range of natural products and related analogues with excellent regiocontrol. The operational simplicity of the method allows for greater efficiency in the synthesis of complex natural products. Interestingly, the quinone methide dimer intermediates are potent radical-trapping antioxidants; more so than the phenols from which they are derived-or transformed to-despite the fact that they do not possess a labile H-atom for transfer to the peroxyl radicals that propagate autoxidation.
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Affiliation(s)
- Kevin J Romero
- Department of Chemistry, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Matthew S Galliher
- Department of Chemistry, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Mark A R Raycroft
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Ontario, K1N 6N5, Canada
| | - Jean-Philippe R Chauvin
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Ontario, K1N 6N5, Canada
| | - Irene Bosque
- Department of Chemistry, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Derek A Pratt
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Ontario, K1N 6N5, Canada
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Romero KJ, Galliher MS, Raycroft MAR, Chauvin JR, Bosque I, Pratt DA, Stephenson CRJ. Electrochemical Dimerization of Phenylpropenoids and the Surprising Antioxidant Activity of the Resultant Quinone Methide Dimers. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201810870] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Kevin J. Romero
- Department of Chemistry University of Michigan Ann Arbor MI 48109 USA
| | | | - Mark A. R. Raycroft
- Department of Chemistry and Biomolecular Sciences University of Ottawa Ottawa Ontario K1N 6N5 Canada
| | - Jean‐Philippe R. Chauvin
- Department of Chemistry and Biomolecular Sciences University of Ottawa Ottawa Ontario K1N 6N5 Canada
| | - Irene Bosque
- Department of Chemistry University of Michigan Ann Arbor MI 48109 USA
| | - Derek A. Pratt
- Department of Chemistry and Biomolecular Sciences University of Ottawa Ottawa Ontario K1N 6N5 Canada
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7
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Rao B, Tang J, Wei Y, Zeng X. Ring Expansion via Cleavage of Benzylic C−C Bonds Enabling Direct Synthesis of Medium Ring-Fused Benzocarbocycles. Chem Asian J 2016; 11:991-5. [DOI: 10.1002/asia.201600065] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2016] [Indexed: 01/31/2023]
Affiliation(s)
- Bin Rao
- Center for Organic Chemistry; Frontier Institute of Science and Technology; Xi'an Jiaotong University; Xi'an Shaanxi 710054 P. R. China
| | - Jinghua Tang
- Center for Organic Chemistry; Frontier Institute of Science and Technology; Xi'an Jiaotong University; Xi'an Shaanxi 710054 P. R. China
| | - Yu Wei
- Center for Organic Chemistry; Frontier Institute of Science and Technology; Xi'an Jiaotong University; Xi'an Shaanxi 710054 P. R. China
| | - Xiaoming Zeng
- Center for Organic Chemistry; Frontier Institute of Science and Technology; Xi'an Jiaotong University; Xi'an Shaanxi 710054 P. R. China
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8
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Kondo H, Akiba N, Kochi T, Kakiuchi F. Ruthenium-Catalyzed Monoalkenylation of Aromatic Ketones by Cleavage of Carbon-Heteroatom Bonds with Unconventional Chemoselectivity. Angew Chem Int Ed Engl 2015; 54:9293-7. [DOI: 10.1002/anie.201503641] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2015] [Indexed: 11/10/2022]
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9
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Hong FJ, Chong KW, Low YY, Thomas NF, Kam TS. Transformations of Ferric Chloride-Generated Stilbene Cation Radicals. The Effect of Aromatic Substitution and a Comparison with Anodic Oxidation. Chem Asian J 2015; 10:2207-20. [PMID: 26097065 DOI: 10.1002/asia.201500488] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2015] [Indexed: 11/10/2022]
Abstract
A systematic study on the FeCl3-induced oxidation of 1,2-diarylalkenes was carried out with the focus on the variation of product type as a function of aromatic substitution, as well as to compare the reactivity of stilbene cation radicals generated via Fe(III) oxidation with those generated by anodic oxidation. The aromatic substituents were found to fall into three main categories, namely those that give rise to tetralins and/or dehydrotetralins, those that give products possessing pallidol and ampelopsin F-type carbon skeletons, and last, those that give rise to trimeric products, indanes, and dehydrotetralins/tetralins. The latter are those stilbenes with a para-methoxy substituent in one ring and a para- or meta-EWG (CF3, NO2, Cl, F) in the other, and represent the most prominent departure when compared with the behavior of the same stilbenes under the conditions of anodic oxidation. Reaction pathways to rationalize the formation of the different products are presented.
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Affiliation(s)
- Fong-Jiao Hong
- Department of Chemistry, University of Malaya, 50603, Kuala Lumpur, Malaysia
| | - Kam-Weng Chong
- Department of Chemistry, University of Malaya, 50603, Kuala Lumpur, Malaysia
| | - Yun-Yee Low
- Department of Chemistry, University of Malaya, 50603, Kuala Lumpur, Malaysia
| | - Noel F Thomas
- Department of Chemistry, University of Malaya, 50603, Kuala Lumpur, Malaysia
| | - Toh-Seok Kam
- Department of Chemistry, University of Malaya, 50603, Kuala Lumpur, Malaysia.
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Kondo H, Akiba N, Kochi T, Kakiuchi F. Ruthenium-Catalyzed Monoalkenylation of Aromatic Ketones by Cleavage of Carbon-Heteroatom Bonds with Unconventional Chemoselectivity. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201503641] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Matsuura BS, Keylor MH, Li B, Lin Y, Allison S, Pratt DA, Stephenson CRJ. A scalable biomimetic synthesis of resveratrol dimers and systematic evaluation of their antioxidant activities. Angew Chem Int Ed Engl 2015; 54:3754-7. [PMID: 25650836 DOI: 10.1002/anie.201409773] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2014] [Revised: 11/11/2014] [Indexed: 01/12/2023]
Abstract
An efficient synthetic route to the resveratrol oligomers quadrangularin A and pallidol is reported. It features a scalable biomimetic oxidative dimerization that proceeds in excellent yield and with complete regioselectivity. A systematic evaluation of the natural products and their synthetic precursors as radical-trapping antioxidants has revealed that, contrary to popular belief, this mode of action is unlikely to account for their observed biological activity.
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Affiliation(s)
- Bryan S Matsuura
- Department of Chemistry, University of Michigan, Ann Arbor, MI 48109 (USA)
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Matsuura BS, Keylor MH, Li B, Lin Y, Allison S, Pratt DA, Stephenson CRJ. A Scalable Biomimetic Synthesis of Resveratrol Dimers and Systematic Evaluation of their Antioxidant Activities. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201409773] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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13
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Jepsen TH, Thomas SB, Lin Y, Stathakis CI, de Miguel I, Snyder SA. Harnessing quinone methides: total synthesis of (±)-vaticanol A. Angew Chem Int Ed Engl 2014; 53:6747-51. [PMID: 24841889 PMCID: PMC4106016 DOI: 10.1002/anie.201402858] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2014] [Indexed: 11/12/2022]
Abstract
Although quinone methides are often postulated as intermediates in the biosynthesis of many polyphenolic natural products, deploying their power in a laboratory setting to achieve similar bond constructions has sometimes proven challenging. Herein, a total synthesis of the resveratrol trimer vaticanol A has been achieved through three instances of quinone methide chemistry. These operations, one of which succeeded only under very specific conditions, expediently generated its [7,5]-carbocyclic core, afforded a unique sequence for dihydrobenzofuran formation, and concurrently generated, in addition to the target molecule, a series of diastereomers reflective of many other isolates.
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Affiliation(s)
- Tue H. Jepsen
- Dept. of Chemistry, Columbia University, 3000 Broadway, New York, NY 10027
| | - Stephen B. Thomas
- Dept. of Chemistry, Columbia University, 3000 Broadway, New York, NY 10027
| | - Yunqing Lin
- Dept. of Chemistry, Columbia University, 3000 Broadway, New York, NY 10027
| | | | - Irene de Miguel
- Dept. of Chemistry, Columbia University, 3000 Broadway, New York, NY 10027
| | - Scott A. Snyder
- Dept. of Chemistry, Columbia University, 3000 Broadway, New York, NY 10027
- Dept. of Chemistry, The Scripps Research Institute, 130 Scripps Way, Jupiter, FL 33458
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Jepsen TH, Thomas SB, Lin Y, Stathakis CI, de Miguel I, Snyder SA. Harnessing Quinone Methides: Total Synthesis of (±)-Vaticanol A. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201402858] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Wright NE, Snyder SA. 9-Membered carbocycle formation: development of distinct Friedel-Crafts cyclizations and application to a scalable total synthesis of (±)-caraphenol A. Angew Chem Int Ed Engl 2014; 53:3409-13. [PMID: 24677499 PMCID: PMC4106019 DOI: 10.1002/anie.201311299] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2013] [Indexed: 11/08/2022]
Abstract
Explorations into a series of different approaches for 9-membered carbocycle formation have afforded the first reported example of a 9-exo-dig ring closure via a Au(III)-promoted reaction between an alkyne and an aryl ring as well as several additional, unique Friedel-Crafts-type cyclizations. Analyses of the factors leading to the success of these transformations are provided, with the application of one of the developed 9-membered ring closures affording an efficient and scalable synthesis of the bioactive resveratrol trimer caraphenol A. That synthesis proceeded with an average yield of 89% per step (7.8% overall yield) and has provided access to more than 600 mg of the target molecule.
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Affiliation(s)
- Nathan E. Wright
- Dept. of Chemistry, Columbia University, 3000 Broadway, New York, NY 10027
| | - Scott A. Snyder
- Dept. of Chemistry, Columbia University, 3000 Broadway, New York, NY 10027
- Dept. of Chemistry, The Scripps Research Institute, 130 Scripps Way, Jupiter, FL 33458
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Wright NE, Snyder SA. 9-Membered Carbocycle Formation: Development of Distinct Friedel-Crafts Cyclizations and Application to a Scalable Total Synthesis of (±)-Caraphenol A. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201311299] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Guan Y, Ding Z, Wulff WD. Vaulted biaryls in catalysis: A structure-activity relationship guided tour of the immanent domain of the VANOL ligand. Chemistry 2013; 19:15565-71. [PMID: 24123264 DOI: 10.1002/chem.201302451] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2013] [Indexed: 11/06/2022]
Abstract
The active site in the BOROX catalyst is a chiral polyborate anion (boroxinate) that is assembled in situ from three equivalents of B(OPh)3 and one of the VANOL ligand by a molecule of substrate. The substrates are bound to the boroxinate by H bonds to oxygen atoms O1-O3. The effects of introducing substituents at each position of the naphthalene core of the VANOL ligand are systematically investigated in an aziridination reaction. Substituents in the 4,4'- and 8,8'-positions have a negative effect on catalyst performance, whereas, substituents in the 7- and 7'-positions have the biggest impact in a positive direction.
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Affiliation(s)
- Yong Guan
- Department of Chemistry, Michigan State University, East Lansing, MI 48824 (USA)
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