1
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Li SS, Zhao LL, Pan M, Feng N, Li BQ, Zhang XZ, Peng JB, Ma AJ. Total Synthesis of (+)-Peniciketal B. Org Lett 2023; 25:8501-8505. [PMID: 37975639 DOI: 10.1021/acs.orglett.3c03472] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2023]
Abstract
An efficient synthesis of (+)-peniciketal B has been accomplished in 15 steps from the commercially available materials atraric acid, acryloyl chloride, and (+)-homoallylic alcohol. A convergent synthetic approach that is quite concise for constructing either "hemisphere" of (+)-peniciketal B with a common intermediate is employed that relies on a cascade intermolecular FeCl3-mediated "inner sphere" Michael-type reaction/double cyclization of an α,β-unsaturated ketone and substituted phenol to build the benzo-fused 2,8-dioxabicyclo[3.3.1]nonane with excellent diastereoselectivity. The generality of the transformation was also demonstrated by the broad scope of substrates that would be potential candidates for natural product synthesis and medicinal chemistry. Benzannulated [6,6]spiroketal was installed by a late-stage acid-catalyzed spiroketalization.
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Affiliation(s)
- Shan-Shan Li
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, Guangdong 529020, China
| | - Li-Li Zhao
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, Guangdong 529020, China
| | - Min Pan
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, Guangdong 529020, China
| | - Na Feng
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, Guangdong 529020, China
| | - Bao-Qiong Li
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, Guangdong 529020, China
| | - Xiang-Zhi Zhang
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, Guangdong 529020, China
| | - Jin-Bao Peng
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, Guangdong 529020, China
| | - Ai-Jun Ma
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, Guangdong 529020, China
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2
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Zhu JX, Tian JM, Chen YY, Hu XJ, Han X, Chen W, Yang Z, Bao X, Ye X, Chen H, Zhang FM, Wang H, Tu YQ. Enantioselective Synthesis of 2,3,3a,8a-Tetrahydrofuro[2,3- b]benzofuran Scaffolds Enabled by Cu(II)/SPDO-Catalyzed [3+2] Cycloaddition of 2,3-Dihydrofuran and Quinone Esters. J Org Chem 2023; 88:14670-14675. [PMID: 37815481 DOI: 10.1021/acs.joc.3c01681] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/11/2023]
Abstract
An asymmetric [3+2] cycloaddition of quinone esters with 2,3-dihydrofuran has been realized via a newly developed Cu(II)/SPDO complex. It provides straightforward access to 2,3,3a,8a-tetrahydrofuro[2,3-b]benzofurans (TFB) with high enantioselectivity (up to 97.5:2.5 er) and diastereoselectivity (all >20:1 dr). The resulting adducts contain two adjacent stereocenters and a continuously functionalized benzene ring. Additionally, this transformation could be easily performed on a gram scale, allowing for expedient synthesis of natural dihydroaflatoxin D2 and aflatoxin B2.
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Affiliation(s)
- Jin-Xin Zhu
- College of Pharmaceutical Science and Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou 310014, China
| | - Jin-Miao Tian
- College of Pharmaceutical Science and Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou 310014, China
| | - Yao-Yao Chen
- College of Pharmaceutical Science and Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou 310014, China
| | - Xue-Jiao Hu
- College of Pharmaceutical Science and Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou 310014, China
| | - Xue Han
- State Key Laboratory of Applied Organic Chemistry and College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Wenchao Chen
- College of Pharmaceutical Science and Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou 310014, China
| | - Zhikun Yang
- College of Pharmaceutical Science and Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou 310014, China
| | - Xiaoze Bao
- College of Pharmaceutical Science and Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou 310014, China
| | - Xinyi Ye
- College of Pharmaceutical Science and Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou 310014, China
| | - Hua Chen
- College of Pharmaceutical Science and Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou 310014, China
| | - Fu-Min Zhang
- State Key Laboratory of Applied Organic Chemistry and College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Hong Wang
- College of Pharmaceutical Science and Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou 310014, China
| | - Yong-Qiang Tu
- State Key Laboratory of Applied Organic Chemistry and College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
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3
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Zhang X, Wang D, Chang M, Wang W, Shen Z, Xu X. CuBr-mediated synthesis of 1,4-naphthoquinones via ring expansion of 2-aryl-1,3-indandiones. Chem Commun (Camb) 2023; 59:12326-12329. [PMID: 37753616 DOI: 10.1039/d3cc03753c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/28/2023]
Abstract
A CuBr-mediated direct insertion of alkenes into unstrained ring 2-aryl-1,3-indandiones is reported, which provides a one-carbon ring expansion strategy for the synthesis of 1,4-naphthoquinones. Entirely differing from the existing reports, the alkenes herein behave as C1 units to participate in annulation reactions. This transformation provides a facile route to access a class of highly functionalized 1,4-naphthoquinones with good yields, good functional-group tolerance and high atom-economy. Further research on the application of this reaction is currently underway in our laboratory.
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Affiliation(s)
- Xu Zhang
- College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University, Nanyang 473061, China.
| | - Di Wang
- College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University, Nanyang 473061, China.
| | - Mengfan Chang
- College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University, Nanyang 473061, China.
| | - Wanya Wang
- College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University, Nanyang 473061, China.
| | - Zhi Shen
- College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University, Nanyang 473061, China.
| | - Xuefeng Xu
- College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University, Nanyang 473061, China.
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4
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Mishra DR, Panda BS, Nayak S, Panda J, Mohapatra S. Recent Advances in the Synthesis of 5‐Membered
N
‐Heterocycles via Rhodium Catalysed Cascade Reactions. ChemistrySelect 2022. [DOI: 10.1002/slct.202200531] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Deepak R. Mishra
- Organic Synthesis Laboratory Department of Chemistry Ravenshaw University Cuttack 753003 Odisha India
| | - Bhabani S. Panda
- Organic Synthesis Laboratory Department of Chemistry Ravenshaw University Cuttack 753003 Odisha India
| | - Sabita Nayak
- Organic Synthesis Laboratory Department of Chemistry Ravenshaw University Cuttack 753003 Odisha India
| | - Jasmine Panda
- Organic Synthesis Laboratory Department of Chemistry Ravenshaw University Cuttack 753003 Odisha India
| | - Seetaram Mohapatra
- Organic Synthesis Laboratory Department of Chemistry Ravenshaw University Cuttack 753003 Odisha India
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5
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Abstract
The synthesis of tricyclic 5,5-benzannulated spiroketal scaffolds was accomplished from 2'-hydroxyacetophenones and gem-dibromoalkenes involving a one-pot domino strategy. The hitherto unknown transformation afforded the tricyclic 5,5-benzannulated spiroketals as single diastereomers in high yields with a broad substrate scope.
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Affiliation(s)
- Maddali L N Rao
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, India
| | - Sk Shamim Islam
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, India
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6
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Ando Y, Fukazawa T, Ohmori K, Suzuki K. Model Study toward Total Synthesis of Dimeric Pyranonaphthoquinones: Synthesis of Hemi-Actinorhodin. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2021. [DOI: 10.1246/bcsj.20210053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Yoshio Ando
- Department of Chemistry, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro-ku, Tokyo 152-8551, Japan
| | - Takumi Fukazawa
- Department of Chemistry, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro-ku, Tokyo 152-8551, Japan
| | - Ken Ohmori
- Department of Chemistry, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro-ku, Tokyo 152-8551, Japan
| | - Keisuke Suzuki
- Department of Chemistry, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro-ku, Tokyo 152-8551, Japan
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7
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Gai S, Henneveld JS, Cording AP, Badart MP, Lucas NT, Hawkins BC. The synthesis of benzannulated spiroketals from 1,1-diacyl-2-phenylcyclopropanes. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2021.152984] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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8
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Yi L, Kong J, Xiong Y, Yi S, Gan T, Huang C, Duan Y, Zhu X. Genome mining of Streptomyces sp. CB00271 as a natural high-producer of β-rubromycin and the resulting discovery of β-rubromycin acid. Biotechnol Bioeng 2021; 118:2243-2254. [PMID: 33629382 DOI: 10.1002/bit.27732] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2020] [Revised: 02/18/2021] [Accepted: 02/22/2021] [Indexed: 11/06/2022]
Abstract
β-rubromycin (β-RUB) (1) is an efficient inhibitor of human telomerase possessing a unique spiroketal moiety as a potential pharmacophore and regarded as a promising anticancer drug lead. But the development of (β-RUB) (1) has long been hampered by its low titer and very poor water solubility. By adopting a genome mining strategy, an FAD-dependent monooxygenase RubN involving with the formation of the spiro system was applied as the probe and Streptomyces sp. CB00271 was screened out from our strain collection as an alternative natural high producer of β-RUB (1). After a series of fermentation optimizations, CB00271 could produce 124.8 ± 3.4 mg/L β-RUB (1), which was the highest titer up to now. Moreover, the enhanced production of β-RUB (1) in fermentation broth also led to the discovery of a new congener β-RUB acid (7), which was structurally elucidated as the acid form of β-RUB (1). Comparing to β-RUB (1), the substituted carboxyl group endowed β-RUB acid (7) much better solubility in serum and resulted in its higher activity towards tumor cells. Our work set up a solid base for the pilot-scale production of β-RUB (1) and its congeners to facilitate their future development as promising anticancer drug leads, and also provide an alternative and practical strategy for the exploitation of other important microbial natural products.
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Affiliation(s)
- Liwei Yi
- Xiangya International Academy of Translational Medicine, Central South University, Changsha, Hunan, China
| | - Jieqian Kong
- Xiangya International Academy of Translational Medicine, Central South University, Changsha, Hunan, China
| | - Yi Xiong
- Xiangya International Academy of Translational Medicine, Central South University, Changsha, Hunan, China
| | - Sirui Yi
- Xiangya International Academy of Translational Medicine, Central South University, Changsha, Hunan, China
| | - Ting Gan
- Xiangya International Academy of Translational Medicine, Central South University, Changsha, Hunan, China
| | - Chengshuang Huang
- Xiangya International Academy of Translational Medicine, Central South University, Changsha, Hunan, China
| | - Yanwen Duan
- Xiangya International Academy of Translational Medicine, Central South University, Changsha, Hunan, China.,National Engineering Research Center of Combinatorial Biosynthesis for Drug Discovery, Changsha, Hunan, China.,Hunan Engineering Research Center of Combinatorial Biosynthesis and Natural Product Drug Discovery, Changsha, Hunan, China
| | - Xiangcheng Zhu
- Xiangya International Academy of Translational Medicine, Central South University, Changsha, Hunan, China.,National Engineering Research Center of Combinatorial Biosynthesis for Drug Discovery, Changsha, Hunan, China.,Hunan Engineering Research Center of Combinatorial Biosynthesis and Natural Product Drug Discovery, Changsha, Hunan, China
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9
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Characterization of Streptomyces piniterrae sp. nov. and Identification of the Putative Gene Cluster Encoding the Biosynthesis of Heliquinomycins. Microorganisms 2020; 8:microorganisms8040495. [PMID: 32244447 PMCID: PMC7232196 DOI: 10.3390/microorganisms8040495] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2020] [Revised: 03/28/2020] [Accepted: 03/30/2020] [Indexed: 01/29/2023] Open
Abstract
A novel actinomycete producing heliquinomycin and 9’-methoxy-heliquinomycin, designated strain jys28T, was isolated from rhizosphere soil of Pinus yunnanensis and characterized using a polyphasic approach. The strain had morphological characteristics and chemotaxonomic properties identical to those of members of the genus Streptomyces. It formed spiral chains of spores with spiny surfaces. The menaquinones detected were MK-9(H6), MK-9(H8) and MK-9(H4). The major fatty acids were iso-C16:0, C15:0, C16:1ω7с and anteiso-C15:0. The phospholipids were diphosphatidylglycerol, phosphatidylmethylethanolamine, phosphatidylethanolamine and phosphatidylinositol mannoside. The DNA G + C content of the draft genome sequence, consisting of 8.5 Mbp, was 70.6%. Analysis of the 16S rRNA gene sequence showed that strain jys28T belongs to the genus Streptomyces with the highest sequence similarities to Streptomyces chattanoogensis NBRC 13058T (99.2%) and Streptomyces lydicus DSM 40002T (99.2%) and phylogenetically clustered with them. Multilocus sequence analysis based on five other house-keeping genes (atpD, gyrB, rpoB, recA and trpB) and the low level of DNA–DNA relatedness and phenotypic differences allowed the novel isolate to be differentiated from its most closely related strains. Therefore, the strain is concluded to represent a novel species of the genus Streptomyces, for which the name Streptomycespiniterrae sp. nov. is proposed. Furthermore, the putative biosynthetic gene cluster of heliquinomycins was identified and the biosynthetic pathway was discussed. The type strain is jys28T (=CCTCC AA 2018051T =DSM 109823T).
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10
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Wood JM, da Silva Júnior EN, Bower JF. Rh-Catalyzed [2 + 2 + 2] Cycloadditions with Benzoquinones: De Novo Access to Naphthoquinones for Lignan and Type II Polyketide Synthesis. Org Lett 2020; 22:265-269. [PMID: 31850764 DOI: 10.1021/acs.orglett.9b04266] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The first examples of Rh-catalyzed [2 + 2 + 2] cycloadditions between diynes and benzoquinones are described. The method enables de novo and step-economical access to challenging naphthoquinones that are of relevance to lignan and type II polyketide synthesis. The value of the chemistry is demonstrated by a short total synthesis of justicidone.
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Affiliation(s)
- James M Wood
- School of Chemistry , University of Bristol , Bristol , BS8 1TS , United Kingdom
| | - Eufrânio N da Silva Júnior
- Institute of Exact Sciences, Department of Chemistry , Federal University of Minas Gerais , Belo Horizonte , MG 31270-901 , Brazil
| | - John F Bower
- School of Chemistry , University of Bristol , Bristol , BS8 1TS , United Kingdom
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11
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12
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Zhou L, Yu SY, Tang Y, Wang L. Facile Stereoselective Approach to Diverse Spiroheterocyclic Tetrahydropyrans: Concise Synthesis of (+)-Broussonetine G and H. Angew Chem Int Ed Engl 2019; 58:15016-15020. [PMID: 31390139 DOI: 10.1002/anie.201907353] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2019] [Revised: 07/25/2019] [Indexed: 01/02/2023]
Abstract
A highly diastereoselective copper-catalyzed multicomponent cyclization of exocyclic enol ethers/enamines with methylene malonate and aldehydes has been developed to furnish spiroheterocyclic tetrahydropyrans in high yields with greater than 95:5 d.r. This method is practical, in that 36 examples, including a range of aldehydes and exo-vinyl heterocycles, are presented. By applying the newly developed method, the total synthesis of (+)-broussonetine G and formal synthesis of (+)-broussonetine H were achieved in a concise way.
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Affiliation(s)
- Li Zhou
- The State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, CAS, University of Chinese Academy of Sciences, 345 Lingling Lu, Shanghai, 200032, China
| | - Shu-Yang Yu
- The State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, CAS, University of Chinese Academy of Sciences, 345 Lingling Lu, Shanghai, 200032, China
| | - Yong Tang
- The State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, CAS, University of Chinese Academy of Sciences, 345 Lingling Lu, Shanghai, 200032, China
| | - Lijia Wang
- The State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, CAS, University of Chinese Academy of Sciences, 345 Lingling Lu, Shanghai, 200032, China.,School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Rd., Shanghai, 200241, China
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13
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Zhou L, Yu S, Tang Y, Wang L. Facile Stereoselective Approach to Diverse Spiroheterocyclic Tetrahydropyrans: Concise Synthesis of (+)‐Broussonetine G and H. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201907353] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Li Zhou
- The State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic Chemistry, CAS University of Chinese Academy of Sciences 345 Lingling Lu Shanghai 200032 China
| | - Shu‐Yang Yu
- The State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic Chemistry, CAS University of Chinese Academy of Sciences 345 Lingling Lu Shanghai 200032 China
| | - Yong Tang
- The State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic Chemistry, CAS University of Chinese Academy of Sciences 345 Lingling Lu Shanghai 200032 China
| | - Lijia Wang
- The State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic Chemistry, CAS University of Chinese Academy of Sciences 345 Lingling Lu Shanghai 200032 China
- School of Chemistry and Molecular Engineering East China Normal University 500 Dongchuan Rd. Shanghai 200241 China
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14
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Zhou B, Liu Q, Wang H, Jin H, Liu Y. CuI/Cu(OTf)2/DMSO system-catalyzed intramolecular oxidative cyclization of (o-alkynyl)arylketones: Efficient synthesis of 1,4-naphthoquinones. Tetrahedron 2019. [DOI: 10.1016/j.tet.2019.05.066] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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15
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Si X, Jia Y, Luan X, Yang L, Pei Y, Zhou W. Insight into 6π Electrocyclic Reactions of 1,8‐Dioxatetraene. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201812090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Xiaodong Si
- College of Chemical EngineeringXiangtan University Hunan 411105 China
- State Key Laboratory of Natural and Biomimetic DrugsPeking University Xue Yuan Road 38 Beijing 100191 China
| | - Yuanyuan Jia
- College of Chemical EngineeringXiangtan University Hunan 411105 China
- State Key Laboratory of Natural and Biomimetic DrugsPeking University Xue Yuan Road 38 Beijing 100191 China
| | - Xinqi Luan
- Key Laboratory for Green Organic Synthesis and Application of Hunan ProvinceCollege of ChemistryXiangtan University Hunan 411105 China
| | - Luo Yang
- Key Laboratory for Green Organic Synthesis and Application of Hunan ProvinceCollege of ChemistryXiangtan University Hunan 411105 China
| | - Yong Pei
- Key Laboratory for Green Organic Synthesis and Application of Hunan ProvinceCollege of ChemistryXiangtan University Hunan 411105 China
| | - Wang Zhou
- College of Chemical EngineeringXiangtan University Hunan 411105 China
- State Key Laboratory of Natural and Biomimetic DrugsPeking University Xue Yuan Road 38 Beijing 100191 China
- Key Laboratory for Green Organic Synthesis and Application of Hunan ProvinceCollege of ChemistryXiangtan University Hunan 411105 China
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16
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Insight into 6π Electrocyclic Reactions of 1,8‐Dioxatetraene. Angew Chem Int Ed Engl 2019; 58:2660-2664. [DOI: 10.1002/anie.201812090] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2018] [Revised: 12/14/2019] [Indexed: 01/06/2023]
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17
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Gillard RM, Brimble MA. Benzannulated spiroketal natural products: isolation, biological activity, biosynthesis, and total synthesis. Org Biomol Chem 2019; 17:8272-8307. [DOI: 10.1039/c9ob01598a] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
A review discussing the isolation, biological activity, biosynthesis, and total synthesis of naturally occurring benzannulated spiroketals.
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Affiliation(s)
- Rachel M. Gillard
- School of Chemical Sciences
- The University of Auckland
- Auckland
- New Zealand
| | - Margaret A. Brimble
- School of Chemical Sciences
- The University of Auckland
- Auckland
- New Zealand
- Maurice Wilkins Centre for Molecular Biodiscovery
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18
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Wakita F, Ando Y, Ohmori K, Suzuki K. Model Reactions for the Enantioselective Synthesis of γ-Rubromycin: Stereospecific Intramolecular Photoredox Cyclization of an ortho-Quinone Ether to a Spiroacetal. Org Lett 2018; 20:3928-3932. [DOI: 10.1021/acs.orglett.8b01475] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Fumihiro Wakita
- Department of Chemistry, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro-ku, Tokyo 152-8551, Japan
| | - Yoshio Ando
- Department of Chemistry, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro-ku, Tokyo 152-8551, Japan
| | - Ken Ohmori
- Department of Chemistry, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro-ku, Tokyo 152-8551, Japan
| | - Keisuke Suzuki
- Department of Chemistry, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro-ku, Tokyo 152-8551, Japan
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19
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El-Hout SI, Suzuki H, El-Sheikh SM, Hassan HMA, Harraz FA, Ibrahim IA, El-Sharkawy EA, Tsujimura S, Holzinger M, Nishina Y. Tuning the redox potential of vitamin K 3 derivatives by oxidative functionalization using a Ag(i)/GO catalyst. Chem Commun (Camb) 2018; 53:8890-8893. [PMID: 28740985 DOI: 10.1039/c7cc03910g] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
We propose herein initial results to develop optimum redox mediators by the combination of computational simulation and catalytic functionalization of the core structure of vitamin K3. We aim to correlate the calculated energy value of the LUMO of different vitamin K3 derivatives with their actual redox potential. For this, we optimized the catalytic alkylation of 1,4-naphthoquinones with a designed Ag(i)/GO catalyst and synthesized a series of molecules.
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Affiliation(s)
- S I El-Hout
- Nanostructured Materials and Nanotechnology Division, Central Metallurgical Research and Development Institute (CMRDI), P.O. 87 Helwan, Cairo 11421, Egypt
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20
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Du X, Li X, Tang H, Wang W, Ramella D, Luan Y. A facile 2H-chromene dimerization through an ortho-quinone methide intermediate catalyzed by a sulfonyl derived MIL-101 MOF. NEW J CHEM 2018. [DOI: 10.1039/c8nj01354c] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An efficient homo-dimerization of 2H-chromenes was achieved in high yield and diastereoselectivity using a MIL-101–SO3H MOF catalyst.
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Affiliation(s)
- Xin Du
- School of Materials Science and Engineering
- University of Science and Technology Beijing
- Beijing 100083
- P. R. China
| | - Xiujuan Li
- School of Materials Science and Engineering
- University of Science and Technology Beijing
- Beijing 100083
- P. R. China
| | - Houliang Tang
- Department of Chemistry
- Southern Methodist University
- Dallas
- USA
| | | | | | - Yi Luan
- School of Materials Science and Engineering
- University of Science and Technology Beijing
- Beijing 100083
- P. R. China
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21
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Sarkar D, Behera S, Ashe S, Nayak B, Seth SK. Facile TMSOI catalysed stereoselective synthesis of 2-Methylene selanyl-4-chromanols and anti-cancer activity. Tetrahedron 2017. [DOI: 10.1016/j.tet.2017.11.007] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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22
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Midya A, Maity S, Ghorai P. Dynamic Kinetic Spiroketalization/Oxa-Michael Addition Cascade of Alkoxyboronates and Peroxyacetals: Enantio- and Diastereoselective Synthesis of Benzannulated Spiroketals. Chemistry 2017. [DOI: 10.1002/chem.201701291] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Abhisek Midya
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Bhopal; Bhopal By-pass Road, Bhauri Bhopal 462066 India
| | - Sanjay Maity
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Bhopal; Bhopal By-pass Road, Bhauri Bhopal 462066 India
| | - Prasanta Ghorai
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Bhopal; Bhopal By-pass Road, Bhauri Bhopal 462066 India
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23
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Iorio M, Cruz J, Simone M, Bernasconi A, Brunati C, Sosio M, Donadio S, Maffioli SI. Antibacterial Paramagnetic Quinones from Actinoallomurus. JOURNAL OF NATURAL PRODUCTS 2017; 80:819-827. [PMID: 28218529 DOI: 10.1021/acs.jnatprod.6b00654] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Four metabolites, designated paramagnetoquinone A, B, C, and D (1-4), were isolated from three strains belonging to the actinomycete genus Actinoallomurus. Compounds 1 and 2 showed potent antibacterial activity with MIC values lower than 0.015 μg/mL against Gram-positive pathogens, including antibiotic-resistant strains. Since compounds 1 and 2 were NMR-silent due to the presence of an oxygen radical, structure elucidation was achieved through a combination of derivatizations, oxidations, and analysis of 13C-labeled compounds. The paramagnetoquinones share the same carbon scaffold as tetracenomycin but carry two quinones and a five-membered lactone fused to the aromatic system. Compounds 2 and 1 are identical except for an unprecedented replacement of a methoxy in 2 by a methylamino group in 1. Related compounds devoid of methyl group(s) and of antibacterial activity were isolated from a different Actinoallomurus strain. The likely pmq biosynthetic gene cluster was identified from strain ID145113. While the cluster encodes many of the expected enzymes involved in the formation of aromatic polyketides, it also encodes a dedicated ketoacid dehydrogenase complex and an unusual acyl carrier protein transacylase, suggesting that an unusual starter unit might prime the polyketide synthase.
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Affiliation(s)
| | - João Cruz
- KtedoGen Srl , Viale Ortles 22/4, 20139 Milano, Italy
| | - Matteo Simone
- Naicons Srl , Viale Ortles 22/4, 20139 Milano, Italy
| | | | | | | | - Stefano Donadio
- Naicons Srl , Viale Ortles 22/4, 20139 Milano, Italy
- KtedoGen Srl , Viale Ortles 22/4, 20139 Milano, Italy
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24
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Wilsdorf M, Sörgel S, Reissig HU. Lessons Learned During Spiroketalization Experiments: Progress and Setbacks in the Preparation of Oxygenated Rubromycins and Synthesis of 3′-Deoxyheliquinomycinone. European J Org Chem 2016. [DOI: 10.1002/ejoc.201601225] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Michael Wilsdorf
- Institut für Chemie und Biochemie; Freie Universität Berlin; Takustr. 3 14195 Berlin Germany
| | - Sebastian Sörgel
- Institut für Chemie und Biochemie; Freie Universität Berlin; Takustr. 3 14195 Berlin Germany
| | - Hans-Ulrich Reissig
- Institut für Chemie und Biochemie; Freie Universität Berlin; Takustr. 3 14195 Berlin Germany
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25
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Wilsdorf M, Reissig HU. Towards γ-Rubromycin: Model Studies, Development of a C3Building Block, and Synthesis of 4′-Silyl-γ-rubromycin. European J Org Chem 2016. [DOI: 10.1002/ejoc.201601224] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Michael Wilsdorf
- Institut für Chemie und Biochemie; Freie Universität Berlin; Takustr. 3 14195 Berlin Germany
| | - Hans-Ulrich Reissig
- Institut für Chemie und Biochemie; Freie Universität Berlin; Takustr. 3 14195 Berlin Germany
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26
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Tautomerism in o-hydroxyanilino-1,4-naphthoquinone derivatives: Structure, NMR, HPLC and density functional theoretic investigations. J Mol Struct 2016. [DOI: 10.1016/j.molstruc.2016.06.026] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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27
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28
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Saikia I, Borah AJ, Phukan P. Use of Bromine and Bromo-Organic Compounds in Organic Synthesis. Chem Rev 2016; 116:6837-7042. [PMID: 27199233 DOI: 10.1021/acs.chemrev.5b00400] [Citation(s) in RCA: 283] [Impact Index Per Article: 35.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Bromination is one of the most important transformations in organic synthesis and can be carried out using bromine and many other bromo compounds. Use of molecular bromine in organic synthesis is well-known. However, due to the hazardous nature of bromine, enormous growth has been witnessed in the past several decades for the development of solid bromine carriers. This review outlines the use of bromine and different bromo-organic compounds in organic synthesis. The applications of bromine, a total of 107 bromo-organic compounds, 11 other brominating agents, and a few natural bromine sources were incorporated. The scope of these reagents for various organic transformations such as bromination, cohalogenation, oxidation, cyclization, ring-opening reactions, substitution, rearrangement, hydrolysis, catalysis, etc. has been described briefly to highlight important aspects of the bromo-organic compounds in organic synthesis.
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Affiliation(s)
| | - Arun Jyoti Borah
- Department of Chemistry, Gauahti University , Guwahati-781014, Assam, India
| | - Prodeep Phukan
- Department of Chemistry, Gauahti University , Guwahati-781014, Assam, India
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29
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Yoshida K, Itatsu Y, Fujino Y, Inoue H, Takao KI. Enantioselective Organocatalytic Construction of Spiroindane Derivatives by Intramolecular Friedel-Crafts-Type 1,4-Addition. Angew Chem Int Ed Engl 2016; 55:6734-8. [PMID: 27111396 DOI: 10.1002/anie.201601683] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2016] [Indexed: 12/27/2022]
Abstract
The highly enantioselective organocatalytic construction of spiroindanes containing an all-carbon quaternary stereocenter by intramolecular Friedel-Crafts-type 1,4-addition is described. The reaction was catalyzed by a cinchonidine-based primary amine and accelerated by water and p-bromophenol. A variety of spiro compounds containing quaternary stereocenters were obtained with excellent enantioselectivity (up to 95 % ee). The reaction was applied to the asymmetric formal synthesis of the spirocyclic natural products (-)-cannabispirenones A and B.
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Affiliation(s)
- Keisuke Yoshida
- Department of Applied Chemistry, Keio University, Hiyoshi, Kohoku-ku, Yokohama, 223-8522, Japan.
| | - Yukihiro Itatsu
- Department of Applied Chemistry, Keio University, Hiyoshi, Kohoku-ku, Yokohama, 223-8522, Japan
| | - Yuta Fujino
- Department of Applied Chemistry, Keio University, Hiyoshi, Kohoku-ku, Yokohama, 223-8522, Japan
| | - Hiroki Inoue
- Department of Applied Chemistry, Keio University, Hiyoshi, Kohoku-ku, Yokohama, 223-8522, Japan
| | - Ken-Ichi Takao
- Department of Applied Chemistry, Keio University, Hiyoshi, Kohoku-ku, Yokohama, 223-8522, Japan.
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30
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Yoshida K, Itatsu Y, Fujino Y, Inoue H, Takao KI. Enantioselective Organocatalytic Construction of Spiroindane Derivatives by Intramolecular Friedel-Crafts-Type 1,4-Addition. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201601683] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Keisuke Yoshida
- Department of Applied Chemistry; Keio University; Hiyoshi, Kohoku-ku Yokohama 223-8522 Japan
| | - Yukihiro Itatsu
- Department of Applied Chemistry; Keio University; Hiyoshi, Kohoku-ku Yokohama 223-8522 Japan
| | - Yuta Fujino
- Department of Applied Chemistry; Keio University; Hiyoshi, Kohoku-ku Yokohama 223-8522 Japan
| | - Hiroki Inoue
- Department of Applied Chemistry; Keio University; Hiyoshi, Kohoku-ku Yokohama 223-8522 Japan
| | - Ken-ichi Takao
- Department of Applied Chemistry; Keio University; Hiyoshi, Kohoku-ku Yokohama 223-8522 Japan
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31
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Xue J, Zhang H, Tian T, Yin K, Liu D, Jiang X, Li Y, Jin X, Yao X. Organohalogenite-Catalyzed Spiroketalization: Enantioselective Synthesis of Bisbenzannulated Spiroketal Cores. Adv Synth Catal 2016. [DOI: 10.1002/adsc.201500390] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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32
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Cossy J, Guérinot A. Natural Products Containing Oxygen Heterocycles—Synthetic Advances Between 1990 and 2015. ADVANCES IN HETEROCYCLIC CHEMISTRY 2016. [DOI: 10.1016/bs.aihch.2016.03.002] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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33
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Shen Z, Chen M, Fang T, Li M, Mo W, Hu B, Sun N, Hu X. Transformation of ethers into aldehydes or ketones: a catalytic aerobic deprotection/oxidation pathway. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.04.033] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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34
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Kamat DP, Tilve SG, Kamat VP, Kirtany JK. Syntheses and Biological Activities of Chroman-2-ones. A Review. ORG PREP PROCED INT 2015. [DOI: 10.1080/00304948.2015.983805] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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35
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Atkinson DJ, Brimble MA. Isolation, biological activity, biosynthesis and synthetic studies towards the rubromycin family of natural products. Nat Prod Rep 2015; 32:811-40. [DOI: 10.1039/c4np00153b] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The rubromycins are a unique family of natural products. This review covers their isolation, biological activity, biosynthesis and a detailed discussion of the diverse chemistry employed for total synthesis.
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Affiliation(s)
- Darcy J. Atkinson
- School of Chemical Sciences, The University of Auckland
- Auckland
- New Zealand
- Maurice Wilkins Centre for Molecular Biodiscovery, The University of Auckland
- Auckland
| | - Margaret A. Brimble
- School of Chemical Sciences, The University of Auckland
- Auckland
- New Zealand
- Maurice Wilkins Centre for Molecular Biodiscovery, The University of Auckland
- Auckland
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36
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Willis NJ, Bray CD. An ortho-quinone methide based strategy towards the rubromycin spiroketal family. RSC Adv 2015. [DOI: 10.1039/c5ra17108c] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A method for the generation/in situhetero-Diels–Alder cycloaddition of a trisubstitutedortho-quinone methide (o-QM) is described.
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Affiliation(s)
- N. J. Willis
- Department of Chemistry
- Queen Mary University of London
- London E1 4NS
- United Kingdom
| | - C. D. Bray
- Department of Chemistry
- Queen Mary University of London
- London E1 4NS
- United Kingdom
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37
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38
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39
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Bernardo CEP, Silva PJ. Computational development of rubromycin-based lead compounds for HIV-1 reverse transcriptase inhibition. PeerJ 2014; 2:e470. [PMID: 25071993 PMCID: PMC4103094 DOI: 10.7717/peerj.470] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2014] [Accepted: 06/16/2014] [Indexed: 11/23/2022] Open
Abstract
The binding of several rubromycin-based ligands to HIV1-reverse transcriptase was analyzed using molecular docking and molecular dynamics simulations. MM-PBSA analysis and examination of the trajectories allowed the identification of several promising compounds with predicted high affinity towards reverse transcriptase mutants which have proven resistant to current drugs. Important insights on the complex interplay of factors determining the ability of ligands to selectively target each mutant have been obtained.
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Affiliation(s)
- Carlos E P Bernardo
- REQUIMTE/Faculdade de Ciências da Saúde, Universidade Fernando Pessoa , Rua Carlos da Maia, Porto , Portugal
| | - Pedro J Silva
- REQUIMTE/Faculdade de Ciências da Saúde, Universidade Fernando Pessoa , Rua Carlos da Maia, Porto , Portugal
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40
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Song L, Yao H, Tong R. Biomimetic Asymmetric Total Syntheses of Spirooliganones A and B. Org Lett 2014; 16:3740-3. [DOI: 10.1021/ol501593m] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Liyan Song
- Department
of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
| | - Hongliang Yao
- Department
of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
| | - Rongbiao Tong
- Department
of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
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41
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Abstract
A short total synthesis, guided by biosynthetic considerations, of racemic merochlorin B is presented. The formation of its isomer, merochlorin A, was not observed under the conditions. Key steps include a directed ortho-metalation (DoM), a selective demethylation, an ortho-allylation, and an oxidative [3 + 2]-cycloaddition mediated by an iodine(III) reagent.
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Affiliation(s)
- Robin Meier
- Department of Chemistry and Center for Integrated Protein Science, University of Munich (LMU) , Butenandtstraße 5-13, 81377 München, Germany
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42
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Sharma I, Wurst JM, Tan DS. Solvent-dependent divergent functions of Sc(OTf)₃ in stereoselective epoxide-opening spiroketalizations. Org Lett 2014; 16:2474-7. [PMID: 24742081 PMCID: PMC4018158 DOI: 10.1021/ol500853q] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
![]()
A stereocontrolled
synthesis of benzannulated spiroketals has been
developed using solvent-dependent Sc(OTf)3-mediated spirocyclizations
of exo-glycal epoxides having alcohol side chains.
In THF, the reaction proceeds via Lewis acid catalysis under kinetic
control with inversion of configuration at the anomeric carbon. In
contrast, in CH2Cl2, Brønsted acid catalysis
under thermodynamic control leads to retention of configuration. The
reactions accommodate a variety of aryl substituents and ring sizes
and provide stereochemically diverse spiroketals.
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Affiliation(s)
- Indrajeet Sharma
- Molecular Pharmacology & Chemistry Program, ‡Tri-Institutional PhD Program in Chemical Biology, and Tri-Institutional Research Program, Memorial Sloan Kettering Cancer Center , 1275 York Avenue, Box 422, New York, New York 10065, United States
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43
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Wang J, Zhu HT, Li YX, Wang LJ, Qiu YF, Qiu ZH, Zhong MJ, Liu XY, Liang YM. Facile Synthesis of Halogenated Spiroketals via a Tandem Iodocyclization. Org Lett 2014; 16:2236-9. [DOI: 10.1021/ol500741a] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Jia Wang
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, P.R. China
| | - Hai-Tao Zhu
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, P.R. China
| | - Ying-Xiu Li
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, P.R. China
| | - Li-Jing Wang
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, P.R. China
| | - Yi-Feng Qiu
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, P.R. China
| | - Zi-Hang Qiu
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, P.R. China
| | - Mei-jin Zhong
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, P.R. China
| | - Xue-Yuan Liu
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, P.R. China
| | - Yong-Min Liang
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, P.R. China
- State
Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical
Physics, Chinese Academy of Science, Lanzhou, 730000, P.R. China
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44
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Wilsdorf M, Reissig HU. A Convergent Total Synthesis of the Telomerase Inhibitor (±)-γ-Rubromycin. Angew Chem Int Ed Engl 2014; 53:4332-6. [DOI: 10.1002/anie.201400315] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2014] [Indexed: 11/08/2022]
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45
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Wilsdorf M, Reißig HU. Eine konvergente Totalsynthese des Telomerase-Inhibitors (±)-γ-Rubromycin. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201400315] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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46
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Fernández A, Alvarez E, Alvarez-Manzaneda R, Chahboun R, Alvarez-Manzaneda E. A short synthetic route towards merosesquiterpenes with a benzoxanthene skeleton. Chem Commun (Camb) 2014; 50:13100-2. [DOI: 10.1039/c4cc05116e] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A short synthetic sequence for the preparation of merosesquiterpenes with a benzoxanthene skeleton starting from (−)-sclareol is reported. The D ring of the target compound is obtained through a Diels–Alder cycloaddition.
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Affiliation(s)
- Antonio Fernández
- Departamento de Química Orgánica
- Facultad de Ciencias
- Instituto de Biotecnología
- Universidad de Granada
- 18071 Granada, Spain
| | - Esteban Alvarez
- Departamento de Química Orgánica
- Facultad de Ciencias
- Instituto de Biotecnología
- Universidad de Granada
- 18071 Granada, Spain
| | - Ramón Alvarez-Manzaneda
- Área de Química Orgánica
- Departamento de Química y Física
- Universidad de Almería
- 04120 Almería, Spain
| | - Rachid Chahboun
- Departamento de Química Orgánica
- Facultad de Ciencias
- Instituto de Biotecnología
- Universidad de Granada
- 18071 Granada, Spain
| | - Enrique Alvarez-Manzaneda
- Departamento de Química Orgánica
- Facultad de Ciencias
- Instituto de Biotecnología
- Universidad de Granada
- 18071 Granada, Spain
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47
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Synthesis of 5,6- and 6,6-Spirocyclic Compounds. SYNTHESIS OF SATURATED OXYGENATED HETEROCYCLES I 2014. [DOI: 10.1007/978-3-642-41473-2_5] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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48
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Zhu HT, Wang J, Qiu ZH, Wang LJ, Zhong MJ, Liu XY, Liang YM. Electrophile-Promoted Tandem Cyclization of α,β-Diynyl Ketodiols: A Facile Synthesis of Tetrahalogenated Spiroketals. ASIAN J ORG CHEM 2013. [DOI: 10.1002/ajoc.201300202] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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49
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Wang X, Guo P, Wang X, Wang Z, Ding K. Practical Asymmetric Catalytic Synthesis of Spiroketals and Chiral Diphosphine Ligands. Adv Synth Catal 2013. [DOI: 10.1002/adsc.201300380] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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50
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Design and synthesis of pyrido[3,2-α]carbazole derivatives and their analogues as potent antitumour agents. Eur J Med Chem 2013; 66:531-9. [PMID: 23835448 DOI: 10.1016/j.ejmech.2013.05.045] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2013] [Revised: 05/27/2013] [Accepted: 05/29/2013] [Indexed: 11/20/2022]
Abstract
A series of pyrido[3,2-α]carbazole derivatives and their analogues have been prepared and evaluated for their antitumour activity against human lung cancer A549 cells and colon cancer HT29 cells. The intermediates 4a-4k are successfully synthesized from 1a-1k and ethyl 2-(3-bromopyridin-2-yl)acetate by Knoevenagel condensation and intramolecular Heck-type reaction, and this is a novel and efficient synthetic approach to the core scaffold of the target compounds. These target compounds have shown an interesting antitumour profile towards the tested cell lines with IC50 values ranging from 0.07 μM to 4.45 μM. Among all the compounds synthesized, 8 compounds show higher potency than R16, 12 compounds are as potent as R16, and 6 compounds are less potent than R16. The best compound 24 is 7 times and approximately 10 times as potent as R16 against A549 and HT29 cells, respectively.
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