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Kumar S, Chhatwal RJ, Maity J, Senapati NN, Prasad AK. Fujiwara‐Moritani Assisted Synthesis of Conjugated 2,3‐Dihydrofuran Trienes and Corresponding 2,3‐Dihydrobenzofuran Derivative. ChemistrySelect 2023. [DOI: 10.1002/slct.202204064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Sandeep Kumar
- Department of Chemistry University of Delhi Delhi 110007 India
| | | | - Jyotirmoy Maity
- Department of Chemistry St. Stephen's College University of Delhi – 110007 India
| | | | - Ashok K. Prasad
- Department of Chemistry University of Delhi Delhi 110007 India
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2
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Phang YL, Liu S, Zheng C, Xu H. Recent advances in the synthesis of natural products containing the phloroglucinol motif. Nat Prod Rep 2022; 39:1766-1802. [PMID: 35762867 DOI: 10.1039/d1np00077b] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Covering: June 2009 to 2021Natural products containing a phloroglucinol motif include simple and oligomeric phloroglucinols, polycyclic polyprenylated acylphloroglucinols, phloroglucinol-terpenes, xanthones, flavonoids, and coumarins. These compounds represent a major class of secondary metabolites which exhibit a wide range of biological activities such as antimicrobial, anti-inflammatory, antioxidant and hypoglycaemic properties. A number of these compounds have been authorized for therapeutic use or are currently being studied in clinical trials. Their structural diversity and utility in both traditional and conventional medicine have made them popular synthetic targets over the years. In this review, we compile and summarise the recent synthetic approaches to the natural products bearing a phloroglucinol motif. Focus has been given on ingenious strategies to functionalize the phloroglucinol moiety at multiple positions. The isolation and bioactivities of the compounds are also provided.
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Affiliation(s)
- Yee Lin Phang
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China. .,Engineering Research Center of Shanghai Colleges for TCM New Drug Discovery, Shanghai 201203, China
| | - Song Liu
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China. .,Engineering Research Center of Shanghai Colleges for TCM New Drug Discovery, Shanghai 201203, China
| | - Changwu Zheng
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China. .,Engineering Research Center of Shanghai Colleges for TCM New Drug Discovery, Shanghai 201203, China
| | - Hongxi Xu
- Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China.
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3
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Dapkekar AB, Sreenivasulu C, Kishore DR, Satyanarayana G. Recent Advances Towards the Synthesis of Dihydrobenzofurans and Dihydroisobenzofurans. ASIAN J ORG CHEM 2022. [DOI: 10.1002/ajoc.202200012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
| | | | | | - Gedu Satyanarayana
- Indian Institute of Technology Hyderabad Chemistry KandiSangareddy District 502 285 Hyderabad INDIA
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4
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Tan F, Pu M, He J, Li J, Yang J, Dong S, Liu X, Wu YD, Feng X. Catalytic Asymmetric Homologation of Ketones with α-Alkyl α-Diazo Esters. J Am Chem Soc 2021; 143:2394-2402. [PMID: 33507075 DOI: 10.1021/jacs.0c12683] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The homologation of ketones with diazo compounds is a useful strategy to synthesize one-carbon chain-extended acyclic ketones or ring-expanded cyclic ketones. However, the asymmetric homologation of acyclic ketones with α-diazo esters remains a challenge due to the lower reactivity and complicated selectivity. Herein, we report the enantioselective catalytic homologation of acetophenone and related derivatives with α-alkyl α-diazo esters utilizing a chiral scandium(III) N,N'-dioxide as the Lewis acid catalyst. This reaction supplies a highly chemo-, regio-, and enantioselective pathway for the synthesis of optically active β-keto esters with an all-carbon quaternary center through highly selective alkyl-group migration of the ketones. Moreover, the ring expansion of cyclic ketones was accomplished under slightly modified conditions, affording a series of enantioenriched cyclic β-keto esters. Density functional theory calculations have been carried out to elucidate the reaction pathway and possible working models that can explain the observed regio- and enantioselectivity.
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Affiliation(s)
- Fei Tan
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, People's Republic of China
| | - Maoping Pu
- Shenzhen Bay Laboratory, Shenzhen 518055, People's Republic of China
| | - Jun He
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, People's Republic of China
| | - Jinzhao Li
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, People's Republic of China
| | - Jian Yang
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, People's Republic of China
| | - Shunxi Dong
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, People's Republic of China
| | - Xiaohua Liu
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, People's Republic of China
| | - Yun-Dong Wu
- Shenzhen Bay Laboratory, Shenzhen 518055, People's Republic of China.,Lab of Computational Chemistry and Drug Design, State Key Laboratory of Chemical Oncogenomics, Peking University Shenzhen Graduate School, Shenzhen 518055, People's Republic of China
| | - Xiaoming Feng
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, People's Republic of China
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Patel K, Mishra UK, Mukhopadhyay D, Ramasastry SSV. Beyond the Corey-Chaykovsky Reaction: Synthesis of Unusual Cyclopropanoids via Desymmetrization and Thereof. Chem Asian J 2019; 14:4568-4571. [PMID: 31513351 DOI: 10.1002/asia.201901108] [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: 08/09/2019] [Revised: 09/11/2019] [Indexed: 01/11/2023]
Abstract
Desymmetrization-based protocols for the synthesis of highly functionalized indeno-spirocyclopropanes and cyclopropa-fused indanes have been established through unexpected reactions triggered by the Corey-Chaykovsky reagent. These structures were further elaborated in one step to privileged scaffolds such as fluorenones, indenones, and naphthaphenones. For instance, an acid-catalyzed transformation of indeno-spirocyclopropanes provided fluorenones via a homo-Nazarov-type cyclization, and naphthaphenones were obtained via an acid-catalyzed cyclopropane ring-opening/retro-Michael sequence.
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Affiliation(s)
- Kaushalendra Patel
- Organic Synthesis and Catalysis Lab, Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Knowledge City, Sector 81, S. A. S. Nagar, Manauli PO, Punjab, 140306, India
| | - Uttam K Mishra
- Organic Synthesis and Catalysis Lab, Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Knowledge City, Sector 81, S. A. S. Nagar, Manauli PO, Punjab, 140306, India
| | - Dipto Mukhopadhyay
- Organic Synthesis and Catalysis Lab, Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Knowledge City, Sector 81, S. A. S. Nagar, Manauli PO, Punjab, 140306, India
| | - S S V Ramasastry
- Organic Synthesis and Catalysis Lab, Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Knowledge City, Sector 81, S. A. S. Nagar, Manauli PO, Punjab, 140306, India
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6
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Mishra UK, Patel K, Ramasastry SSV. Synthesis of Cyclopropanoids via Substrate-Based Cyclization Pathways. Org Lett 2019; 21:175-179. [PMID: 30543443 DOI: 10.1021/acs.orglett.8b03537] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
A series of unexpected reactions triggered by the dimethyloxosulfonium methylide led to the discovery of unconventional approaches for the synthesis of cyclopropa-fused tetralones and indeno-spirocyclopropanes. These highly functionalized structures were further elaborated in one step to privileged scaffolds such as tetralones, indenones, and fluorenones. As a whole, the results presented herein establish new diversity-oriented folding pathways.
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Affiliation(s)
- Uttam K Mishra
- Organic Synthesis and Catalysis Lab, Department of Chemical Sciences , Indian Institute of Science Education and Research (IISER) Mohali , Sector 81 , Manauli PO, S. A. S. Nagar, Punjab 140306 , India
| | - Kaushalendra Patel
- Organic Synthesis and Catalysis Lab, Department of Chemical Sciences , Indian Institute of Science Education and Research (IISER) Mohali , Sector 81 , Manauli PO, S. A. S. Nagar, Punjab 140306 , India
| | - S S V Ramasastry
- Organic Synthesis and Catalysis Lab, Department of Chemical Sciences , Indian Institute of Science Education and Research (IISER) Mohali , Sector 81 , Manauli PO, S. A. S. Nagar, Punjab 140306 , India
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7
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Chen Z, Pitchakuntla M, Jia Y. Synthetic approaches to natural products containing 2,3-dihydrobenzofuran skeleton. Nat Prod Rep 2019; 36:666-690. [DOI: 10.1039/c8np00072g] [Citation(s) in RCA: 52] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
This review describes the synthetic approaches to natural products containing the 2,3-dihydrobenzofuran (2,3-DHB) skeleton.
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Affiliation(s)
- Zhuang Chen
- State Key Laboratory of Natural and Biomimetic Drugs
- School of Pharmaceutical Sciences
- Peking University
- Beijing 100191
- China
| | - Mallesham Pitchakuntla
- State Key Laboratory of Natural and Biomimetic Drugs
- School of Pharmaceutical Sciences
- Peking University
- Beijing 100191
- China
| | - Yanxing Jia
- State Key Laboratory of Natural and Biomimetic Drugs
- School of Pharmaceutical Sciences
- Peking University
- Beijing 100191
- China
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8
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Tanaka T, Nagahama M, Yadav ND, Iwasaki H, Ozeki M, Kojima N, Yamashita M. Reaction of 2a,8b-Dihydrobenzo[b]cyclobute[d]pyran-3-ones with Dimethylsulfoxonium Methylide. Chem Pharm Bull (Tokyo) 2016; 64:1056-61. [PMID: 27373667 DOI: 10.1248/cpb.c16-00303] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Using dimethylsulfoxonium methylide as the methylene transfer reagent, 2a,8b-dihydrobenzo[b]cyclobute[d]pyran-3-ones were converted into 2,2'-biphenol derivatives as major products and dihydrodibenzofurans as minor products. The reaction mechanism was extrapolated from a deuteration experiment with CD2=S(O)(CD3)2.
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9
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Candeias NR, Paterna R, Gois PMP. Homologation Reaction of Ketones with Diazo Compounds. Chem Rev 2016; 116:2937-81. [DOI: 10.1021/acs.chemrev.5b00381] [Citation(s) in RCA: 201] [Impact Index Per Article: 25.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Nuno R. Candeias
- Department
of Chemistry and Bioengineering, Tampere University of Technology, Korkeakoulunkatu 8, Tampere, FI-33101 Finland
| | - Roberta Paterna
- Research
Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidad of Lisboa, Av. Prof. Gama Pinto, 1649-003 Lisbon, Portugal
| | - Pedro M. P. Gois
- Research
Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidad of Lisboa, Av. Prof. Gama Pinto, 1649-003 Lisbon, Portugal
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10
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Chen P, Cui C. Isolable Boron Persulfide: Activation of Elemental Sulfur with a 2-Chloro-Azaborolyl Anion. Chemistry 2016; 22:2902-5. [DOI: 10.1002/chem.201505182] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2015] [Indexed: 11/06/2022]
Affiliation(s)
- Peixing Chen
- State Key Laboratory of Elemento-Organic Chemistry; Cooperative Innovation Center of Chemical Science and Engineering (Tianjin); Nankai University; 94 Weijinlu Road Tianjin 300071 P.R. China
| | - Chunming Cui
- State Key Laboratory of Elemento-Organic Chemistry; Cooperative Innovation Center of Chemical Science and Engineering (Tianjin); Nankai University; 94 Weijinlu Road Tianjin 300071 P.R. China
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11
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Tanaka T, Miura T, Inoue S, Iwasaki H, Ozeki M, Kojima N, Yamashita M. Skeletal transformation of α-pyrones having electron-withdrawing groups at 3,5-positions into ring-fused dihydrofurans. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.09.059] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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12
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Smith JM, Moreno J, Boal BW, Garg NK. Fischer Indolizations as a Strategic Platform for the Total Synthesis of Picrinine. J Org Chem 2015; 80:8954-67. [DOI: 10.1021/acs.joc.5b00872] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Joel M. Smith
- Department
of Chemistry and
Biochemistry, University of California, Los Angeles, California 90095, United States
| | - Jesus Moreno
- Department
of Chemistry and
Biochemistry, University of California, Los Angeles, California 90095, United States
| | - Ben W. Boal
- Department
of Chemistry and
Biochemistry, University of California, Los Angeles, California 90095, United States
| | - Neil K. Garg
- Department
of Chemistry and
Biochemistry, University of California, Los Angeles, California 90095, United States
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13
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Liu Q, Zhu FP, Jin XL, Wang XJ, Chen H, Wu LZ. Visible-Light-Driven Intermolecular [2+2] Cycloadditions between Coumarin-3-Carboxylates and Acrylamide Analogs. Chemistry 2015; 21:10326-9. [DOI: 10.1002/chem.201501176] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2015] [Indexed: 11/06/2022]
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14
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Dethe DH, Dherange BD. Enantioselective Total Syntheses of (+)-Hostmanin A, (−)-Linderol A, (+)-Methyllinderatin and Structural Reassignment of Adunctin E. J Org Chem 2015; 80:4526-31. [DOI: 10.1021/acs.joc.5b00331] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Dattatraya H. Dethe
- Department
of Chemistry, Indian Institute of Technology Kanpur, Kanpur-208016, India
| | - Balu D. Dherange
- Department
of Chemistry, Indian Institute of Technology Kanpur, Kanpur-208016, India
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15
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Smith JM, Moreno J, Boal BW, Garg NK. Total synthesis of the akuammiline alkaloid picrinine. J Am Chem Soc 2014; 136:4504-7. [PMID: 24597784 PMCID: PMC3985766 DOI: 10.1021/ja501780w] [Citation(s) in RCA: 93] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2014] [Indexed: 01/22/2023]
Abstract
We report the first total synthesis of the complex akuammiline alkaloid picrinine, which was first isolated nearly five decades ago. Our synthetic approach features a concise assembly of the [3.3.1]-azabicyclic core, a key Fischer indolization reaction to forge the natural product's carbon framework, and a series of delicate late-stage transformations to complete the synthesis. Our synthesis of picrinine also constitutes a formal synthesis of the related polycyclic alkaloid strictamine.
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Affiliation(s)
- Joel M. Smith
- Department
of Chemistry and
Biochemistry, University of California, Los Angeles, California 90095, United States
| | - Jesus Moreno
- Department
of Chemistry and
Biochemistry, University of California, Los Angeles, California 90095, United States
| | - Ben W. Boal
- Department
of Chemistry and
Biochemistry, University of California, Los Angeles, California 90095, United States
| | - Neil K. Garg
- Department
of Chemistry and
Biochemistry, University of California, Los Angeles, California 90095, United States
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16
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Miura T, Fujioka S, Iwasaki H, Ozeki M, Kojima N, Yamashita M. Skeleton transformation of α-pyrone induced by 5-aryl substituent into ring-fused dihydrofuran. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.01.057] [Citation(s) in RCA: 9] [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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17
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Miura T, Yadav ND, Iwasaki H, Ozeki M, Kojima N, Yamashita M. Novel Skeleton Transformation Reaction of α-Pyrone Derivatives to Spirobicyclo[3.1.0]hexane Derivatives Using Dimethylsulfoxonium Methylide. Org Lett 2012; 14:6048-51. [DOI: 10.1021/ol302942m] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Takuya Miura
- Kyoto Pharmaceutical University, 1 Misasagi-Shichono, Yamashina, Kyoto 607-8412, Japan
| | | | - Hiroki Iwasaki
- Kyoto Pharmaceutical University, 1 Misasagi-Shichono, Yamashina, Kyoto 607-8412, Japan
| | - Minoru Ozeki
- Kyoto Pharmaceutical University, 1 Misasagi-Shichono, Yamashina, Kyoto 607-8412, Japan
| | - Naoto Kojima
- Kyoto Pharmaceutical University, 1 Misasagi-Shichono, Yamashina, Kyoto 607-8412, Japan
| | - Masayuki Yamashita
- Kyoto Pharmaceutical University, 1 Misasagi-Shichono, Yamashina, Kyoto 607-8412, Japan
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18
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Nomura S, Arimitsu K, Yamaguchi S, Kosuga Y, Kakimoto Y, Komai T, Hasegawa K, Nakanishi A, Miyoshi T, Iwasaki H, Ozeki M, Kawasaki I, Kurume A, Ohta S, Yamashita M. Synthesis of (.+-.)-8-Deisopropyladunctin B. Chem Pharm Bull (Tokyo) 2012; 60:94-103. [DOI: 10.1248/cpb.60.94] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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19
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Arimitsu K, Nomura S, Iwasaki H, Ozeki M, Yamashita M. First total synthesis of (±)-adunctin B. Tetrahedron Lett 2011. [DOI: 10.1016/j.tetlet.2011.10.018] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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20
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Song ZL, Fan CA, Tu YQ. Semipinacol Rearrangement in Natural Product Synthesis. Chem Rev 2011; 111:7523-56. [PMID: 21851053 DOI: 10.1021/cr200055g] [Citation(s) in RCA: 389] [Impact Index Per Article: 29.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Zhen-Lei Song
- Key Laboratory of Drug-Targeting of Education Ministry and Department of Medicinal Chemistry, West China School of Pharmacy, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, P. R. China
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, P. R. China
| | - Chun-An Fan
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, P. R. China
| | - Yong-Qiang Tu
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, P. R. China
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21
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Yamashita M, Kitao J, Kitamura N, Kumo N, Kurume A, Arimitsu K, Iwasaki H, Ozeki M. The First Total Syntheses of (+)-Hostmanin A and (+)-Methyllinderatin. HETEROCYCLES 2011. [DOI: 10.3987/com-10-12084] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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22
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Delaye PO, Lameiras P, Kervarec N, Mirand C, Berber H. Improved Enantioselective Synthesis of (−)-Linderol A: Hindered Rotation about Aryl−Csp3 Bond. J Org Chem 2010; 75:2501-9. [DOI: 10.1021/jo902567y] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Pierre-Olivier Delaye
- Institut de Chimie Moléculaire de Reims, CNRS UMR 6229, Université de Reims Champagne-Ardenne, Faculté de Pharmacie, 51 rue Cognacq-Jay, F-51096 Reims Cedex, France
| | - Pedro Lameiras
- Institut de Chimie Moléculaire de Reims, CNRS UMR 6229, Moulin de la Housse, Bâtiment 18, BP 1039, F-51687 Reims Cedex 2, France
| | - Nelly Kervarec
- Service Commun de RMN-RPE, 6 avenue Victor-Le-Gorgeu, CS 93837, F-29238 Cedex 3, France
| | - Catherine Mirand
- Institut de Chimie Moléculaire de Reims, CNRS UMR 6229, Université de Reims Champagne-Ardenne, Faculté de Pharmacie, 51 rue Cognacq-Jay, F-51096 Reims Cedex, France
| | - Hatice Berber
- Institut de Chimie Moléculaire de Reims, CNRS UMR 6229, Université de Reims Champagne-Ardenne, Faculté de Pharmacie, 51 rue Cognacq-Jay, F-51096 Reims Cedex, France
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23
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Yamashita M, Yadav ND, Sumida Y, Kawasaki I, Kurume A, Ohta S. Discrepancy of the spectral data between adunctin E and the synthetic one. Tetrahedron Lett 2007. [DOI: 10.1016/j.tetlet.2007.06.050] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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24
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Yamashita M, Yadav ND, Sawaki T, Takao I, Kawasaki I, Sugimoto Y, Miyatake A, Murai K, Takahara A, Kurume A, Ohta S. Asymmetric Total Synthesis of (−)-Linderol A. J Org Chem 2007; 72:5697-703. [PMID: 17579456 DOI: 10.1021/jo070682+] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The first asymmetric total synthesis of (-)-Linderol A, a potent inhibitor of melanin biosynthesis of cultured B-16 melanoma cells, has been achieved via two key reactions: a diastereoselective [2+2] photocycloaddition of a coumarin-3-carboxylate bearing a chiral auxiliary with 3-methyl-1-butene and a subsequent stereoconvergent transformation of the photoadducts with use of dimethylsulfoxonium methylide to afford a tetrahydrodibenzofuran derivative.
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Affiliation(s)
- Masayuki Yamashita
- Department of Functional Molecular Chemistry, 21st COE Program, Kyoto Pharmaceutical University, Misasagi-Nakauchi 5, Yamashina, Kyoto 607-8414, Japan
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25
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Liu Q, Rovis T. Enantioselective Synthesis of Hydrobenzofuranones Using an Asymmetric Desymmetrizing Intramolecular Stetter Reaction of Cyclohexadienones. Org Process Res Dev 2007; 11:598-604. [PMID: 19603085 PMCID: PMC2709411 DOI: 10.1021/op600278f] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A series of cyclohexadienones were synthesized by dearomatization of phenols followed by Dess-Martin oxidation. Asymmetric intramolecular Stetter reactions of these substrates provide hydrobenzofuranones in good to excellent yields and excellent stereoselectivities. Up to three stereocenters as well as quaternary stereocenter are formed from polysubstituted substrates. A scale up experiment demonstrates the utility of this transformation.
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Affiliation(s)
| | - Tomislav Rovis
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, USA
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26
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Liu Q, Rovis T. Asymmetric synthesis of hydrobenzofuranones via desymmetrization of cyclohexadienones using the intramolecular Stetter reaction. J Am Chem Soc 2006; 128:2552-3. [PMID: 16492036 PMCID: PMC2701296 DOI: 10.1021/ja058337u] [Citation(s) in RCA: 238] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Dearomatization of phenols followed by oxidation affords cyclohexadienyloxyacetaldehydes, which produce hydrobenzofuranones via asymmetric intramolecular Stetter reaction in good to excellent yield. Quaternary as well as up to three contiguous stereocenters may be formed in good to excellent enantioselectivities and high diastereoselectivities.
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Affiliation(s)
- Qin Liu
- Department of Chemistry, Colorado State University, Fort Collins, 80523, USA
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Yamashita M, Inaba T, Nagahama M, Shimizu T, Kosaka S, Kawasaki I, Ohta S. Novel stereoconvergent transformation of 1,2a-disubstituted 1,2,2a,8b-tetrahydro-3H-benzo[b]cyclobuta[d]pyran-3-ones to 1,3-disubstituted 1,2,4a,9b-tetrahydrodibenzofuran-4-ols and its application to the second-generation synthesis of (+/-)-linderol A. Org Biomol Chem 2005; 3:2296-304. [PMID: 16010364 DOI: 10.1039/b503890a] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
1,2a-Disubstituted 1,2,2a,8b-tetrahydro-3H-benzo[b]cyclobuta[d]pyran-3-ones bearing an electron-withdrawing group at the 2a-position were treated with two equivalents of dimethylsulfoxonium methylide to give r-1,t-4a,t-9b-1,3-disubstituted 1,2,4a,9b-tetrahydrodibenzofuran-4-ols stereoconvergently regardless of the stereochemistry of the 1-position on the benzocyclobutapyran ring. This methodology was applied to the second-generation synthesis of (+/-)-linderol A, a melanin biosynthesis inhibitory natural product.
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Affiliation(s)
- Masayuki Yamashita
- Department of Functional Molecular Chemistry, 21st COE Program, Kyoto Pharmaceutical University, Misasagi-Nakauchi 5, Yamashina, Kyoto 607-8414, Japan
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Chapter 5.3 Five-membered ring systems: Furans and benzofurans. ACTA ACUST UNITED AC 2005. [DOI: 10.1016/s0959-6380(05)80049-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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Ohta S, Yamashita M, Shimizu T, Inaba T, Takada A, Takao I, Kawasaki I. Improved Synthesis of (±)-Linderol A and Its First Conversion to (±)- 6-epi-Adunctin E. HETEROCYCLES 2005. [DOI: 10.3987/com-05-10345] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Yamashita M, Shimizu T, Kawasaki I, Ohta S. Determination of the absolute configuration and the first total synthesis of (−)- and (+)-linderol A. ACTA ACUST UNITED AC 2004. [DOI: 10.1016/j.tetasy.2004.06.017] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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