1
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Dhara D, Mulard LA, Hollenstein M. Expedient synthesis of l-heptose derived septacidin building blocks from l-glucose. Carbohydr Res 2023; 534:108985. [PMID: 38016254 DOI: 10.1016/j.carres.2023.108985] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2023] [Revised: 11/07/2023] [Accepted: 11/12/2023] [Indexed: 11/30/2023]
Abstract
Bacterial natural products containing heptosides such as septacidin represent interesting scaffolds for the development of drugs to combat antimicrobial resistance. However, very few synthetic strategies have been reported to grant access to these derivatives. Here, we have devised a synthetic pathway to l-glycero-l-glucoheptoside, a key building block en route to septacidin, directly from l-glucose. Importantly, we show that carbon homologation at C6, encompassing oxidation of the C6-OH followed by methylenation, is significantly influenced by the nature of the C4-moiety. In order to observe the effect of various patterns, namely azide (N3), p-methoxybenzyloxy (OPMB), and benzyloxy (OBn), a thorough analysis was conducted on the corresponding l-glucosides. The results unveiled a distinct trend where the efficiency of methylenation followed the trend OBn > OPMB > N3. Finally, the C6-alkene was dihydroxylated in the presence of osmium tetroxide to yield the expected l/d-glycero-l-glucoheptosides. The lead building block, which features a C-4 azide, was delivered as a phenyl thioglycoside. Added to the suitable masking of the 6,7-diol, this combination enables further functionalization to achieve versatile compounds of biological interest. The study insights into the interplay between substitution at C-4 and carbon homologation at C-6 provide valuable guidance for future endeavors in the synthesis of these carbohydrate molecules.
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Affiliation(s)
- Debashis Dhara
- Institut Pasteur, Université Paris Cité, CNRS UMR3523, Department of Structural Biology and Chemistry, Laboratory for Chemistry of Biomolecules, 28 Rue Du Docteur Roux, 75724, Paris, Cedex 15, France; Institut Pasteur, Université Paris Cité, CNRS UMR3523, Department of Structural Biology and Chemistry, Laboratory for Bioorganic Chemistry of Nucleic Acids, 28, Rue Du Docteur Roux, 75724, Paris, Cedex 15, France
| | - Laurence A Mulard
- Institut Pasteur, Université Paris Cité, CNRS UMR3523, Department of Structural Biology and Chemistry, Laboratory for Chemistry of Biomolecules, 28 Rue Du Docteur Roux, 75724, Paris, Cedex 15, France.
| | - Marcel Hollenstein
- Institut Pasteur, Université Paris Cité, CNRS UMR3523, Department of Structural Biology and Chemistry, Laboratory for Bioorganic Chemistry of Nucleic Acids, 28, Rue Du Docteur Roux, 75724, Paris, Cedex 15, France.
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2
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Liu L, Jiang M, Zhang Q, Chen H, Zhang Y, Zhang J. Asymmetric total synthesis strategies of halichlorine and pinnaic acid. RSC Adv 2023; 13:33754-33769. [PMID: 38019985 PMCID: PMC10654894 DOI: 10.1039/d3ra06955a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2023] [Accepted: 11/09/2023] [Indexed: 12/01/2023] Open
Abstract
Halichlorine and pinnaic acid are structurally related natural alkaloids isolated from different marine organisms. These two marine alkaloids bearing a 6-azaspiro[4.5]decane skeleton demonstrate a wide range of biological effects. It is this kind of unique structure and potentially valuable biological activity that have prompted strong synthetic interest, making it a research focus in recent years. Since the first total synthesis of halichlorine and pinnaic acid completed by Danishefsky's group, many groups have reported their outstanding synthesis methods especially the asymmetric synthesis strategies. This review summarizes the asymmetric synthesis strategies of halichlorine and pinnaic acid using a 6-azaspiro[4.5]decane skeleton as the key intermediate, which can provide some guidance for related work.
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Affiliation(s)
- Lu Liu
- School of Pharmacy, Gansu University of Chinese Medicine Lanzhou 730000 P. R. China
| | - Minghua Jiang
- School of Pharmacy, Gansu University of Chinese Medicine Lanzhou 730000 P. R. China
| | - Qingkang Zhang
- School of Pharmacy, Gansu University of Chinese Medicine Lanzhou 730000 P. R. China
| | - Hong Chen
- School of Pharmacy, Gansu University of Chinese Medicine Lanzhou 730000 P. R. China
| | - Yifu Zhang
- School of Pharmacy, Gansu University of Chinese Medicine Lanzhou 730000 P. R. China
- Northwest Collaborative Innovation Center for Traditional Chinese Medicine Co-Constructed by Gansu Province & MOE of PRC Lanzhou 730000 P. R. China
| | - Jian Zhang
- School of Pharmacy, Gansu University of Chinese Medicine Lanzhou 730000 P. R. China
- Northwest Collaborative Innovation Center for Traditional Chinese Medicine Co-Constructed by Gansu Province & MOE of PRC Lanzhou 730000 P. R. China
- Key Laboratory of Chemistry and Quality for TCM of the College of Gansu Province Lanzhou 730000 P. R. China
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3
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Huang BB, Zhao YL, Lei K, Zhong LR, Yang X, Yao ZJ. Enantioselective Total Synthesis of (+)-Sieboldine A and Analogues Thereof. Org Lett 2022; 24:7517-7521. [PMID: 36214606 DOI: 10.1021/acs.orglett.2c02737] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
An 11-step enantioselective total synthesis of (+)-sieboldine A (1) has been accomplished from (5R)-methylcyclohex-2-en-1-one (16), in which an intramolecular ketone/ester reductive coupling followed by one-pot acidic treatment to quickly construct the unique oxa-spiroacetal and a TsOH-catalyzed displacement to directly form the characteristic N-hydroxyazacyclononane ring successfully served as the key methodologies. Moreover, several full-skeleton analogues of 1 were also synthesized on the basis of the advanced intermediates, and their inhibitory effects on electric eel acetylcholinesterase were examined.
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Affiliation(s)
- Bing-Bing Huang
- State Key Laboratory of Coordination Chemistry and Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, 163 Xianlin Avenue, Nanjing, Jiangsu 210023, China
| | - Yi-Lu Zhao
- State Key Laboratory of Coordination Chemistry and Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, 163 Xianlin Avenue, Nanjing, Jiangsu 210023, China
| | - Kaiyu Lei
- State Key Laboratory of Coordination Chemistry and Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, 163 Xianlin Avenue, Nanjing, Jiangsu 210023, China
| | - Lin-Rui Zhong
- State Key Laboratory of Coordination Chemistry and Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, 163 Xianlin Avenue, Nanjing, Jiangsu 210023, China
| | - Xiaoliang Yang
- State Key Laboratory of Coordination Chemistry and Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, 163 Xianlin Avenue, Nanjing, Jiangsu 210023, China
| | - Zhu-Jun Yao
- State Key Laboratory of Coordination Chemistry and Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, 163 Xianlin Avenue, Nanjing, Jiangsu 210023, China
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4
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Bharadwaj V, Rahman MS, Sampson P, Seed AJ, Brasch NE. Exploring the Potential of 2-(2-Nitrophenyl)ethyl-Caged N-Hydroxysulfonamides for the Photoactivated Release of Nitroxyl (HNO). J Org Chem 2021; 86:16448-16463. [PMID: 34797664 DOI: 10.1021/acs.joc.1c01800] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The emergence of nitroxyl (HNO) as a biological signaling molecule is attracting increasing attention. HNO-based prodrugs show considerable potential in treating congestive heart failure, with HNO reacting rapidly with metal centers and protein-bound and free thiols. A new class of 2-(2-nitrophenyl)ethyl (2-NPE)-photocaged N-hydroxysulfonamides has been developed, and the mechanisms of photodecomposition have been investigated. Three photodecomposition pathways are observed: the desired concomitant C-O/N-S bond cleavage to generate HNO, sulfinate, and 2-nitrostyrene, C-O bond cleavage to give the parent sulfohydroxamic acid and 2-nitrostyrene, and O-N bond cleavage to release a sulfonamide and 2-nitrophenylacetaldehyde. Laser flash photolysis experiments provide support for a Norrish type II mechanism involving 1,5-hydrogen atom abstraction to generate an aci-nitro species. A mechanism is proposed in which the (Z)-aci-nitro intermediate undergoes either C-O bond cleavage to release RSO2NHO(H), concerted C-O/N-S bond cleavage to generate sulfinate and HNO, or isomerization to the (E)-isomer prior to O-N bond cleavage. The pKa of the N(H) of the N-hydroxysulfonamide plays a key role in determining whether C-O or concerted C-O/N-S bond cleavage occurs. Deprotonating this site favors the desired C-O/N-S bond cleavage at the expense of an increased level of undesired O-N bond cleavage. Triplet state quenchers have no effect on the observed photoproducts.
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Affiliation(s)
- Vinay Bharadwaj
- School of Science, Auckland University of Technology, Private Bag 92006, Auckland 1142, New Zealand.,The Dodd-Walls Centre for Quantum and Photonic Technologies, Dunedin 9054, New Zealand
| | - Mohammad S Rahman
- Department of Chemistry and Biochemistry, Kent State University, Kent, Ohio 44242, United States
| | - Paul Sampson
- Department of Chemistry and Biochemistry, Kent State University, Kent, Ohio 44242, United States
| | - Alexander J Seed
- Department of Chemistry and Biochemistry, Kent State University, Kent, Ohio 44242, United States
| | - Nicola E Brasch
- School of Science, Auckland University of Technology, Private Bag 92006, Auckland 1142, New Zealand.,The Dodd-Walls Centre for Quantum and Photonic Technologies, Dunedin 9054, New Zealand.,The Maurice Wilkins Centre for Molecular Biodiscovery, Private Bag 92019, Auckland 1142, New Zealand
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5
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Shibata K, Takao KI, Ogura A. Diaryliodonium Salt-Based Synthesis of N-Alkoxyindolines and Further Insights into the Ishikawa Indole Synthesis. J Org Chem 2021; 86:10067-10087. [PMID: 34197104 DOI: 10.1021/acs.joc.1c00820] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A diaryliodonium salt-based strategy enabled the first systematic synthesis of rarely accessible N-alkoxyindolines. Mechanistic analyses suggested that the reaction likely involves reductive elimination of iodobenzene from iodaoxazepine via a four-membered transition state, followed by Meisenheimer rearrangement. Substrates with N-carbamate protection afforded indole in a manner similar to that of the Ishikawa indole synthesis. Preinstallation of a stannyl group as an iodonium salt precursor greatly expanded the substrate scope, and further mechanistic insights are discussed.
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Affiliation(s)
- Kouhei Shibata
- 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
| | - Akihiro Ogura
- Department of Applied Chemistry, Keio University, Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
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6
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Zhang X, Wang Y, Chen P, Cai X, Jia Y. Protecting‐Group‐Free
Total Synthesis of (–)‐Pallambins A—D. CHINESE J CHEM 2021. [DOI: 10.1002/cjoc.202100001] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Xiwu Zhang
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University 38 Xueyuan Road Beijing 100191 China
| | - Yuan Wang
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University 38 Xueyuan Road Beijing 100191 China
| | - Peng Chen
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University 38 Xueyuan Road Beijing 100191 China
| | - Xinxian Cai
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University 38 Xueyuan Road Beijing 100191 China
| | - Yanxing Jia
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University 38 Xueyuan Road Beijing 100191 China
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7
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Zheng TL, Zhang Y, Gou AL, Cheng F, Liu SZ, Yu L, Cui MY, Xu XT, Zhang K, Wang SH. Au(I)-Catalyzed Cyclization/Semipinacol Rearrangement Reaction of Allenes to Construct Quaternary Carbon-Containing Scaffolds. Org Lett 2020; 22:7073-7077. [PMID: 32886523 DOI: 10.1021/acs.orglett.0c02262] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The development of methods toward the construction of quaternary carbon centers has been a hot topic in recent years. In this work, an Au(I)-catalyzed intramolecular cyclization/semipinacol rearrangement of allene-containing allylic silyl ether was developed to provide a direct strategy for the construction of multisubstituted cyclohexene-type compounds with a quaternary carbon center in moderate to good yields. In particular, this method provides an alternative synthetic strategy for the construction of a multisubstituted spirocyclo[4.5]decane skeleton and may be applied to the synthesis of related bioactive molecules and their derivatives, thus facilitating the corresponding functional studies.
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Affiliation(s)
- Tian-Lu Zheng
- School of Pharmacy & State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, P.R. China
| | - Ye Zhang
- School of Pharmacy & State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, P.R. China
| | - A-Long Gou
- School of Pharmacy & State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, P.R. China
| | - Fu Cheng
- School of Pharmacy & State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, P.R. China
| | - Si-Zhan Liu
- School of Pharmacy & State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, P.R. China
| | - Lan Yu
- School of Pharmacy & State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, P.R. China
| | - Ming-Yue Cui
- School of Pharmacy & State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, P.R. China
| | - Xue-Tao Xu
- School of Biotechnology and Health Science, Wuyi University, Jiangmen 529020, P.R. China
| | - Kun Zhang
- School of Biotechnology and Health Science, Wuyi University, Jiangmen 529020, P.R. China
| | - Shao-Hua Wang
- School of Pharmacy & State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, P.R. China
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8
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Abstract
Previously, we have finished the total synthesis of lycojaponicumin A (2) via development of an efficient synthetic strategy using semipinacol rearrangement as a key step. In order to further demonstrate the generality of this synthetic route, herein, we report the total synthesis of another fawcettimine-type alkaloid sieboldine A (1) from the same intermediate, which possesses an A/B/D tricyclic ring system and vicinal quaternary centers of 1. The synthesis features late-stage site-selective redox reactions, Schmidt glycosylation cyclization, and highly selective transformations.
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Affiliation(s)
- Hui Shao
- School of Chemistry and Chemical Engineering, Frontiers Science Center of Transformative Molecules, Shanghai Jiao Tong University, Shanghai, 200240, P. R. China.,Key Laboratory of Applied Surface and Colloid Chemistry & School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710119, P. R. China
| | - Yun-Peng Wang
- School of Chemistry and Chemical Engineering, Frontiers Science Center of Transformative Molecules, Shanghai Jiao Tong University, Shanghai, 200240, P. R. China
| | - Kun Fang
- School of Chemistry and Chemical Engineering, Frontiers Science Center of Transformative Molecules, Shanghai Jiao Tong University, Shanghai, 200240, P. R. China
| | - Yu-Ming Zhao
- Key Laboratory of Applied Surface and Colloid Chemistry & School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710119, P. R. China
| | - Yong-Qiang Tu
- School of Chemistry and Chemical Engineering, Frontiers Science Center of Transformative Molecules, Shanghai Jiao Tong University, Shanghai, 200240, P. R. China
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9
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Tong J, Liu C, Wang B. Synthesis of A-B-C-ring Tricyclic Core of iso-Merrilactone A. Chem Res Chin Univ 2019. [DOI: 10.1007/s40242-019-9064-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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10
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Zhang XM, Tu YQ, Zhang FM, Chen ZH, Wang SH. Recent applications of the 1,2-carbon atom migration strategy in complex natural product total synthesis. Chem Soc Rev 2018; 46:2272-2305. [PMID: 28349159 DOI: 10.1039/c6cs00935b] [Citation(s) in RCA: 119] [Impact Index Per Article: 19.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
1,2-Carbon atom rearrangement has been broadly applied as a guiding strategy in complex molecule assembly. As it entails the carbon-carbon or carbon-heteroatom bond migration between two vicinal atoms, this type of reaction is capable of generating structural complexity through a molecular skeletal reorganization. This review will focus on recent employment of this strategy in the total synthesis of natural products, highlighting the exceptional utility of such synthetic methodologies in the construction of intricate carbocycles, heterocycles or structurally complex motifs from synthetically more accessible precursors.
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Affiliation(s)
- Xiao-Ming Zhang
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, P. R. China.
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11
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Saborit GV, Cativiela C, Jiménez AI, Bonjoch J, Bradshaw B. Synthesis of cis-hydrindan-2,4-diones bearing an all-carbon quaternary center by a Danheiser annulation. Beilstein J Org Chem 2018; 14:2597-2601. [PMID: 30410621 PMCID: PMC6204772 DOI: 10.3762/bjoc.14.237] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2018] [Accepted: 09/21/2018] [Indexed: 11/23/2022] Open
Abstract
A straightforward synthetic entry to functionalized hydrindane compounds based on a rapid assembly of the core nucleus by a Danheiser cycloaddition is reported. Valuable bicyclic building blocks containing the fused five and six-membered carbocyclic ring system can be achieved in only four steps from a simple acyclic β-keto ester.
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Affiliation(s)
- Gisela V Saborit
- Laboratori de Química Orgànica, Facultat de Farmàcia, IBUB, Universitat de Barcelona, Av. Joan XXIII s/n, 08028-Barcelona, Spain
| | - Carlos Cativiela
- Departamento de Química Orgánica Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), CSIC-Universidad de Zaragoza, 50009 Zaragoza, Spain
| | - Ana I Jiménez
- Departamento de Química Orgánica Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), CSIC-Universidad de Zaragoza, 50009 Zaragoza, Spain
| | - Josep Bonjoch
- Laboratori de Química Orgànica, Facultat de Farmàcia, IBUB, Universitat de Barcelona, Av. Joan XXIII s/n, 08028-Barcelona, Spain
| | - Ben Bradshaw
- Laboratori de Química Orgànica, Facultat de Farmàcia, IBUB, Universitat de Barcelona, Av. Joan XXIII s/n, 08028-Barcelona, Spain
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12
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Holzschneider K, Kirsch SF. [1, 2]-Migration Reactions Catalyzed by Gold Complexes and their Applications in Total Synthesis. Isr J Chem 2018. [DOI: 10.1002/ijch.201700081] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
| | - Stefan F. Kirsch
- Organic Chemistry; Bergische Universität Wuppertal; Gaußstr. 20 42119 Wuppertal Germany
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13
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Zhou Y, Cink RB, Fejedelem ZA, Cather Simpson M, Seed AJ, Sampson P, Brasch NE. Development of Photoactivatable Nitroxyl (HNO) Donors Incorporating the (3‐Hydroxy‐2‐naphthalenyl)methyl Phototrigger. European J Org Chem 2018. [DOI: 10.1002/ejoc.201800092] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Yang Zhou
- Department of Chemistry and Biochemistry Kent State University 44242 Kent OH USA
| | - Ruth B. Cink
- School of Science Auckland University of Technology Private Bag 92006 1142 Auckland New Zealand
| | - Zachary A. Fejedelem
- Department of Chemistry and Biochemistry Kent State University 44242 Kent OH USA
| | - M. Cather Simpson
- The Photon Factory School of Chemical Sciences The University of Auckland Private Bag 92019 Auckland New Zealand
| | - Alexander J. Seed
- Department of Chemistry and Biochemistry Kent State University 44242 Kent OH USA
| | - Paul Sampson
- Department of Chemistry and Biochemistry Kent State University 44242 Kent OH USA
| | - Nicola E. Brasch
- School of Science Auckland University of Technology Private Bag 92006 1142 Auckland New Zealand
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14
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Synthesis and application of N-hydroxy(tetrahydrofuran-2-yl)amines. Russ Chem Bull 2018. [DOI: 10.1007/s11172-017-1972-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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15
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Li H, Lei X. Fawcettimine-TypeLycopodiumAlkaloids as a Driving Force for Discoveries in Organic Synthesis. CHEM REC 2017; 18:543-554. [DOI: 10.1002/tcr.201700047] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2017] [Accepted: 12/01/2017] [Indexed: 12/17/2022]
Affiliation(s)
- Houhua Li
- Department of Chemical Biology; Max Planck Institute of Molecular Physiology; Otto-Hahn-Str. 11 D-44227 Dortmund Germany
| | - Xiaoguang Lei
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, Department of Chemical Biology, College of Chemistry and Molecular Engineering, Synthetic and Functional Biomolecules Center, and Peking-Tsinghua Center for Life Sciences; Peking University; Beijing 100871 China
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16
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Recent Advances in Substrate-Controlled Asymmetric Cyclization for Natural Product Synthesis. Molecules 2017; 22:molecules22071069. [PMID: 28672881 PMCID: PMC6152324 DOI: 10.3390/molecules22071069] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2017] [Accepted: 06/21/2017] [Indexed: 02/03/2023] Open
Abstract
Asymmetric synthesis of naturally occurring diverse ring systems is an ongoing and challenging research topic. A large variety of remarkable reactions utilizing chiral substrates, auxiliaries, reagents, and catalysts have been intensively investigated. This review specifically describes recent advances in successful asymmetric cyclization reactions to generate cyclic architectures of various natural products in a substrate-controlled manner.
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17
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Abd El-Gaber MK, Yasuda S, Iida E, Mukai C. Enantioselective Total Synthesis of (+)-Sieboldine A. Org Lett 2017; 19:320-323. [DOI: 10.1021/acs.orglett.6b03416] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Mohammed K. Abd El-Gaber
- Division of Pharmaceutical
Sciences, Graduate School of Medical Sciences, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan
| | - Shigeo Yasuda
- Division of Pharmaceutical
Sciences, Graduate School of Medical Sciences, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan
| | - Eisuke Iida
- Division of Pharmaceutical
Sciences, Graduate School of Medical Sciences, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan
| | - Chisato Mukai
- Division of Pharmaceutical
Sciences, Graduate School of Medical Sciences, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan
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18
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Hartrampf FWW, Furukawa T, Trauner D. A Conia‐Ene‐Type Cyclization under Basic Conditions Enables an Efficient Synthesis of (−)‐Lycoposerramine R. Angew Chem Int Ed Engl 2016; 56:893-896. [PMID: 28000374 DOI: 10.1002/anie.201610021] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2016] [Indexed: 01/15/2023]
Affiliation(s)
- Felix W. W. Hartrampf
- Department of Chemistry Ludwig-Maximilians-Universität München Butenandtstrasse 5–13 81377 München Germany
| | - Takayuki Furukawa
- Department of Chemistry Ludwig-Maximilians-Universität München Butenandtstrasse 5–13 81377 München Germany
- Department of Applied Chemistry, Faculty of Engineering Osaka University, Suita Osaka 565-0871 Japan
| | - Dirk Trauner
- Department of Chemistry Ludwig-Maximilians-Universität München Butenandtstrasse 5–13 81377 München Germany
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19
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Hartrampf FWW, Furukawa T, Trauner D. Eine Conia‐En‐artige Cyclisierung unter basischen Bedingungen ermöglicht die effiziente Synthese von (−)‐Lycoposerramin R. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201610021] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Felix W. W. Hartrampf
- Department für Chemie und Pharmazie Ludwig-Maximilians-Universität München Butenandtstraße 5–13 81377 München Deutschland
| | - Takayuki Furukawa
- Department für Chemie und Pharmazie Ludwig-Maximilians-Universität München Butenandtstraße 5–13 81377 München Deutschland
- Department of Applied Chemistry, Faculty of Engineering Osaka University, Suita Osaka 565-0871 Japan
| | - Dirk Trauner
- Department für Chemie und Pharmazie Ludwig-Maximilians-Universität München Butenandtstraße 5–13 81377 München Deutschland
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20
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Zhou Y, Cink RB, Dassanayake RS, Seed AJ, Brasch NE, Sampson P. Rapid Photoactivated Generation of Nitroxyl (HNO) under Neutral pH Conditions. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201605160] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Yang Zhou
- Department of Chemistry and Biochemistry; Kent State University (KSU); Kent OH 44240 USA
| | - Ruth B. Cink
- School of Applied Sciences; Auckland University of Technology (AUT); Private Bag 92006 Auckland 1142 New Zealand
| | - Rohan S. Dassanayake
- Department of Chemistry and Biochemistry; Kent State University (KSU); Kent OH 44240 USA
| | - Alexander J. Seed
- Department of Chemistry and Biochemistry; Kent State University (KSU); Kent OH 44240 USA
| | - Nicola E. Brasch
- School of Applied Sciences; Auckland University of Technology (AUT); Private Bag 92006 Auckland 1142 New Zealand
| | - Paul Sampson
- Department of Chemistry and Biochemistry; Kent State University (KSU); Kent OH 44240 USA
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21
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Zhou Y, Cink RB, Dassanayake RS, Seed AJ, Brasch NE, Sampson P. Rapid Photoactivated Generation of Nitroxyl (HNO) under Neutral pH Conditions. Angew Chem Int Ed Engl 2016; 55:13229-13232. [DOI: 10.1002/anie.201605160] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2016] [Revised: 08/03/2016] [Indexed: 01/17/2023]
Affiliation(s)
- Yang Zhou
- Department of Chemistry and Biochemistry; Kent State University (KSU); Kent OH 44240 USA
| | - Ruth B. Cink
- School of Applied Sciences; Auckland University of Technology (AUT); Private Bag 92006 Auckland 1142 New Zealand
| | - Rohan S. Dassanayake
- Department of Chemistry and Biochemistry; Kent State University (KSU); Kent OH 44240 USA
| | - Alexander J. Seed
- Department of Chemistry and Biochemistry; Kent State University (KSU); Kent OH 44240 USA
| | - Nicola E. Brasch
- School of Applied Sciences; Auckland University of Technology (AUT); Private Bag 92006 Auckland 1142 New Zealand
| | - Paul Sampson
- Department of Chemistry and Biochemistry; Kent State University (KSU); Kent OH 44240 USA
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22
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Maertens G, Desjardins S, Canesi S. Asymmetric synthesis of (+)-17-epi-methoxy-kauran-3-one through tandem oxidative polycyclization-pinacol process. Org Biomol Chem 2016; 14:6744-50. [PMID: 27327903 DOI: 10.1039/c6ob01142j] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A synthesis of (+)-17-epi-methoxy-kauran-3-one, an O-methylated isomer of the natural diterpene 17-hydroxy-kauran-3-one, has been achieved. The strategy is based on a diastereoselective oxidative polycyclization-pinacol tandem process consisting of transforming a functionalized phenol into a compact and complex tetracycle, which represents the main core of kaurane family members. The synthesis also includes an enantioselective Yamamoto's allylation, a diastereoselective Ru-catalyzed hydrocyanation, a ring-closing metathesis and a reductive isomerization process as key steps. The structure of our synthetic substrate was determined through comparison with an O-methylated derivative of the natural compound.
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Affiliation(s)
- Gaëtan Maertens
- Laboratoire de Méthodologie et Synthèse de Produits Naturels, Université du Québec à Montréal, C.P. 8888, Succ. Centre-Ville, Montréal, H3C 3P8, Québec, Canada.
| | - Samuel Desjardins
- Laboratoire de Méthodologie et Synthèse de Produits Naturels, Université du Québec à Montréal, C.P. 8888, Succ. Centre-Ville, Montréal, H3C 3P8, Québec, Canada.
| | - Sylvain Canesi
- Laboratoire de Méthodologie et Synthèse de Produits Naturels, Université du Québec à Montréal, C.P. 8888, Succ. Centre-Ville, Montréal, H3C 3P8, Québec, Canada.
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23
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Mailyan AK, Eickhoff JA, Minakova AS, Gu Z, Lu P, Zakarian A. Cutting-Edge and Time-Honored Strategies for Stereoselective Construction of C–N Bonds in Total Synthesis. Chem Rev 2016; 116:4441-557. [DOI: 10.1021/acs.chemrev.5b00712] [Citation(s) in RCA: 111] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Artur K. Mailyan
- Department
of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
| | - John A. Eickhoff
- Department
of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
| | - Anastasiia S. Minakova
- Department
of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
| | - Zhenhua Gu
- Department
of Chemistry, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, China
| | - Ping Lu
- Department
of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
| | - Armen Zakarian
- Department
of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
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24
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Reddy BVS, Raju NP, Reddy BJM, Sridhar B. Sequential Prins/Pinacol Strategy for the Stereoselective Synthesis of Spiro-β-tetralones. ASIAN J ORG CHEM 2016. [DOI: 10.1002/ajoc.201500445] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- B. V. Subba Reddy
- Natural Product Chemistry; CSIR-Indian Institute of Chemical Technology; Tarnaka 500 007 India
| | - N. Prudhvi Raju
- Natural Product Chemistry; CSIR-Indian Institute of Chemical Technology; Tarnaka 500 007 India
- Department of Organic Chemistry; Adikavi Nannaya University; Rajahmundry 533105 India
| | - B. Jagan Mohan Reddy
- Department of Organic Chemistry; Adikavi Nannaya University; Rajahmundry 533105 India
| | - B. Sridhar
- Laboratory of X-ray Crystallography; CSIR-Indian Institute of Chemical Technology; Tarnaka 500 007 India
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25
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Pflästerer D, Hashmi ASK. Gold catalysis in total synthesis – recent achievements. Chem Soc Rev 2016; 45:1331-67. [DOI: 10.1039/c5cs00721f] [Citation(s) in RCA: 600] [Impact Index Per Article: 75.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The most recent achievements of gold catalysed transformations applied in total synthesis of natural products are reviewed and analysed.
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Affiliation(s)
- Daniel Pflästerer
- Organisch-Chemisches Institut
- Universität Heidelberg
- 69120 Heidelberg
- Germany
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26
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Shibuya M, Abe M, Fujita S, Yamamoto Y. Reagents for diverse iodosilane-mediated transformations. Org Biomol Chem 2016; 14:5322-8. [DOI: 10.1039/c6ob00900j] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
PhSiH3–I2 and PhSiH3–NIS generate PhSiH2I as a possible active species and cause diverse transformations.
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Affiliation(s)
- Masatoshi Shibuya
- Department of Basic Medicinal Sciences
- Graduate School of Pharmaceutical Sciences
- Nagoya University
- Nagoya 464-8601
- Japan
| | - Masanori Abe
- Department of Basic Medicinal Sciences
- Graduate School of Pharmaceutical Sciences
- Nagoya University
- Nagoya 464-8601
- Japan
| | - Shoji Fujita
- Department of Basic Medicinal Sciences
- Graduate School of Pharmaceutical Sciences
- Nagoya University
- Nagoya 464-8601
- Japan
| | - Yoshihiko Yamamoto
- Department of Basic Medicinal Sciences
- Graduate School of Pharmaceutical Sciences
- Nagoya University
- Nagoya 464-8601
- Japan
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27
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The chemistry of the carbon-transition metal double and triple bond: Annual survey covering the year 2013. Coord Chem Rev 2015. [DOI: 10.1016/j.ccr.2014.09.021] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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28
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Zhu DY, Zhang Z, Mou XQ, Tu YQ, Zhang FM, Peng JB, Wang SH, Zhang SY. Gold(I)/Copper(II)-Cocatalyzed Tandem Cyclization/Semipinacol Reaction: Construction of 6-Aza/Oxa-Spiro[4.5]decane Skeletons and Formal Synthesis of (±)-Halichlorine. Adv Synth Catal 2015. [DOI: 10.1002/adsc.201400932] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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29
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30
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Kim C, Kang S, Rhee YH. Synthesis of the Tricyclic Core in Stemonamine Alkaloids via One-Pot Gold(I)-Catalyzed Cyclization and Schmidt Rearrangement: Formal Synthesis of (±)-Stemonamine. J Org Chem 2014; 79:11119-24. [DOI: 10.1021/jo502103p] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Cheoljae Kim
- Department of Chemistry, POSTECH, 77 Cheongam-Ro,
Nam-Gu, Pohang, Kyungbuk, Republic of Korea, 790-784
| | - Soyeong Kang
- Department of Chemistry, POSTECH, 77 Cheongam-Ro,
Nam-Gu, Pohang, Kyungbuk, Republic of Korea, 790-784
| | - Young Ho Rhee
- Department of Chemistry, POSTECH, 77 Cheongam-Ro,
Nam-Gu, Pohang, Kyungbuk, Republic of Korea, 790-784
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31
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Tovstiga TE, Gillis EAL, Grossert JS, White RL. Characterization of multiple fragmentation pathways initiated by collision-induced dissociation of multifunctional anions formed by deprotonation of 2-nitrobenzenesulfonylglycine. JOURNAL OF MASS SPECTROMETRY : JMS 2014; 49:168-177. [PMID: 24677307 DOI: 10.1002/jms.3324] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2013] [Revised: 12/08/2013] [Accepted: 12/11/2013] [Indexed: 06/03/2023]
Abstract
The correlation of anion structure with the fragmentation behavior of deprotonated nitrobenzenesulfonylamino acids was investigated using tandem mass spectrometry, isotopic labeling and computational methods. Four distinct fragmentation pathways resulting from the collision-induced dissociation (CID) of deprotonated 2-nitrobenzenesulfonylglycine (NsGly) were characterized. The unusual loss of the aryl nitro substituent as HONO was the lowest energy process. Subsequent successive losses of CO, HCN and SO2 indicated that an ortho cyclization reaction had accompanied loss of HONO. Other pathways involving rearrangement of the ionized sulfonamide group, dual bond cleavage and intramolecular nucleophilic displacement were proposed to account for the formation of phenoxide, arylsulfinate and arylsulfonamide product ions at higher collision energies. The four distinct fragmentation pathways were consistent with precursor-product relationships established by CID experiments, isotopic labeling results and the formation of analogous product ions from 2,4-dinitrobenzenesulfonylglycine and the Ns derivatives of alanine and 2-aminoisobutyric acid. The computations confirmed a low barrier for ortho cyclization with loss of HONO and feasible energetics for each reaction step in the four pathways. Computations also indicated that three of the fragmentation pathways started from NsGly ionized at the carboxyl group. Overall, the pathways identified for the fragmentation of the NsGly anion differed from processes reported for anions containing a single functional group, demonstrating the importance of functional group interactions in the fragmentation pathways of multifunctional anions.
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Affiliation(s)
- Tara E Tovstiga
- Department of Chemistry, Dalhousie University, 6274 Coburg Rd., PO Box 15000, Halifax, NS B3H 4R2, Canada
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32
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Jäkel M, Qu J, Schnitzer T, Helmchen G. Addition of Organometallic Reagents to ChiralN‐Methoxylactams: Enantioselective Syntheses of Pyrrolidines and Piperidines. Chemistry 2013; 19:16746-55. [DOI: 10.1002/chem.201302735] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2013] [Indexed: 11/12/2022]
Affiliation(s)
- Mascha Jäkel
- Organisch‐Chemisches Institut, Ruprecht‐Karls‐Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg (Germany), Fax: (+49) 6221‐544205
| | - Jianping Qu
- Organisch‐Chemisches Institut, Ruprecht‐Karls‐Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg (Germany), Fax: (+49) 6221‐544205
| | - Tobias Schnitzer
- Organisch‐Chemisches Institut, Ruprecht‐Karls‐Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg (Germany), Fax: (+49) 6221‐544205
| | - Günter Helmchen
- Organisch‐Chemisches Institut, Ruprecht‐Karls‐Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg (Germany), Fax: (+49) 6221‐544205
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33
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Del Bel M, Rovira A, Guerrero CA. Cyclopentannulation of conjugated enones using a vinyldiazomethane-based reagent. J Am Chem Soc 2013; 135:12188-91. [PMID: 23855814 DOI: 10.1021/ja4054866] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Herein, we describe a two-step method for the cyclopentannulation of conjugated enones using methyl 3-(tert-butyldimethylsilyloxy)-2-diazo-3-butenoate (1) as a bifunctional reagent. The enol silane and stabilized diazoalkane functionalities are exploited independently in sequential Mukaiyama-Michael and diastereoselective α,α'-diketone coupling. Di-, tri-, and tetrasubstituted enones are amenable to annulation under this protocol. Overall, this chemistry is an effective surrogate for a substituted "acetone 1,3-dipole".
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Affiliation(s)
- Matthew Del Bel
- Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093-0358, USA
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34
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Naredla RR, Klumpp DA. Contemporary Carbocation Chemistry: Applications in Organic Synthesis. Chem Rev 2013; 113:6905-48. [DOI: 10.1021/cr4001385] [Citation(s) in RCA: 263] [Impact Index Per Article: 23.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Rajasekhar Reddy Naredla
- Department of Chemistry
and Biochemistry, Northern Illinois University, DeKalb, Illinois 60115,
United States
| | - Douglas A. Klumpp
- Department of Chemistry
and Biochemistry, Northern Illinois University, DeKalb, Illinois 60115,
United States
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35
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Zaimoku H, Nishide H, Nishibata A, Goto N, Taniguchi T, Ishibashi H. Syntheses of (±)-Serratine, (±)-Lycoposerramine T, and (±)-Lycopoclavamine B. Org Lett 2013; 15:2140-3. [DOI: 10.1021/ol400628h] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Hisaaki Zaimoku
- School of Pharmaceutical Sciences, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan
| | - Hiroshi Nishide
- School of Pharmaceutical Sciences, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan
| | - Asami Nishibata
- School of Pharmaceutical Sciences, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan
| | - Naoya Goto
- School of Pharmaceutical Sciences, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan
| | - Tsuyoshi Taniguchi
- School of Pharmaceutical Sciences, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan
| | - Hiroyuki Ishibashi
- School of Pharmaceutical Sciences, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan
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36
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Huber F, Kirsch SF. NIS-Mediated Electrophilic Cyclization of 3-Silyloxy-1,n-enynes. J Org Chem 2013; 78:2780-5. [DOI: 10.1021/jo302751p] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Florian Huber
- Organic Chemistry, Bergische Universität Wuppertal, Gaußstr. 20, 42119 Wuppertal, Germany
| | - Stefan F. Kirsch
- Organic Chemistry, Bergische Universität Wuppertal, Gaußstr. 20, 42119 Wuppertal, Germany
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37
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Tungen JE, Nolsøe JMJ, Hansen TV. Asymmetric Iodolactonization Utilizing Chiral Squaramides. Org Lett 2012; 14:5884-7. [DOI: 10.1021/ol302798g] [Citation(s) in RCA: 94] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Jørn E. Tungen
- School of Pharmacy, Department of Pharmaceutical Chemistry, University of Oslo, P.O. Box 1068 Blindern, N-0316 Oslo, Norway
| | - Jens M. J. Nolsøe
- School of Pharmacy, Department of Pharmaceutical Chemistry, University of Oslo, P.O. Box 1068 Blindern, N-0316 Oslo, Norway
| | - Trond V. Hansen
- School of Pharmacy, Department of Pharmaceutical Chemistry, University of Oslo, P.O. Box 1068 Blindern, N-0316 Oslo, Norway
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38
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Li H, Wang X, Hong B, Lei X. Collective synthesis of Lycopodium alkaloids and tautomer locking strategy for the total synthesis of (-)-lycojapodine A. J Org Chem 2012; 78:800-21. [PMID: 22973823 DOI: 10.1021/jo3017555] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
The collective total synthesis of Lycopodium alkaloids (+)-fawcettimine (1), (+)-fawcettidine (2), (+)-alopecuridine (4), (-)-lycojapodine A (6), and (-)-8-deoxyserratinine (7) has been accomplished from a common precursor (15) based on a highly concise route inspired by the proposed biosynthesis of the fawcettimine- and serratinine-type alkaloids. An intramolecular C-alkylation enabled efficient installation of the challenging spiro quaternary carbon center and the aza-cyclononane ring. The preparation of the tricyclic skeleton as well as the establishment of the correct relative stereochemistry of the oxa-quaternary center were achieved by hydroxyl-directed SmI(2)-mediated pinacol couplings. An unprecedented tandem transannular N-alkylation and removal of a Boc group was discovered to realize a biosynthesis-inspired process to furnish the desired tetracyclic skeleton. Of particular note is the unique and crucial tautomer locking strategy employed to complete the enantioselective total synthesis of (-)-lycojapodine A (6). The central step in this synthesis is the late-stage hypervalent iodine oxidant (IBX or Dess-Martin periodinane)/TFA-mediated tandem process, which constructed the previously unknown carbinolamine lactone motif and enabled a biomimetic transformation to generate (-)-lycojapodine A (6) in a single operation.
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Affiliation(s)
- Houhua Li
- National Institute of Biological Sciences, Beijing 102206, China
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39
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Zhang XM, Shao H, Tu YQ, Zhang FM, Wang SH. Total Syntheses of (+)-Alopecuridine, (+)-Sieboldine A, and (−)-Lycojapodine A. J Org Chem 2012; 77:8174-81. [DOI: 10.1021/jo301545y] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Xiao-Ming Zhang
- State Key
Laboratory of Applied Organic Chemistry,
College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, Gansu 730000, P. R. China
| | - Hui Shao
- State Key
Laboratory of Applied Organic Chemistry,
College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, Gansu 730000, P. R. China
| | - Yong-Qiang Tu
- State Key
Laboratory of Applied Organic Chemistry,
College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, Gansu 730000, P. R. China
| | - Fu-Min Zhang
- State Key
Laboratory of Applied Organic Chemistry,
College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, Gansu 730000, P. R. China
| | - Shao-Hua Wang
- State Key
Laboratory of Applied Organic Chemistry,
College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, Gansu 730000, P. R. China
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