1
|
Sun D, Chen R, Tang D, Xia Q, Zhao Y, Liu CH, Ding H. Total Synthesis of (-)-Retigeranic Acid A: A Reductive Skeletal Rearrangement Strategy. J Am Chem Soc 2023. [PMID: 37224289 DOI: 10.1021/jacs.3c03178] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
The asymmetric total synthesis of (-)-retigeranic acid A was described, which relies on a crucial reductive skeletal rearrangement cascade for the controllable assembly of diverse angular triquinane subunits. Taken together with an intramolecular Michael/aldol cyclization, an ODI-[5 + 2] cycloaddition/pinacol rearrangement cascade, a Wolff ring contraction and a stereoselective HAT reduction, our synthetic approach has enabled the access to (-)-retigeranic acid A in a concise and practical manner.
Collapse
Affiliation(s)
- Dongyu Sun
- Department of Chemistry, Zhejiang University, Hangzhou 310058, China
| | - Ruyi Chen
- Department of Chemistry, Zhejiang University, Hangzhou 310058, China
| | - Dongmin Tang
- Department of Chemistry, Zhejiang University, Hangzhou 310058, China
| | - Qidong Xia
- College of Chemistry, Jilin University, Changchun 130012, China
| | - Yifan Zhao
- Department of Chemistry, Zhejiang University, Hangzhou 310058, China
| | - Chun-Hui Liu
- Department of Chemistry, Zhejiang University, Hangzhou 310058, China
| | - Hanfeng Ding
- Department of Chemistry, Zhejiang University, Hangzhou 310058, China
| |
Collapse
|
2
|
Pasha MA, Anebouselvy K, Ramachary DB. Lawsone as synthon in the catalytic asymmetric reactions. Tetrahedron 2022. [DOI: 10.1016/j.tet.2022.132793] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
3
|
Soares MIL, Cardoso AL, Pinho e Melo TMVD. Diels-Alder Cycloaddition Reactions in Sustainable Media. Molecules 2022; 27:1304. [PMID: 35209094 PMCID: PMC8876200 DOI: 10.3390/molecules27041304] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2022] [Revised: 02/11/2022] [Accepted: 02/13/2022] [Indexed: 11/17/2022] Open
Abstract
Diels-Alder cycloaddition reaction is one of the most powerful strategies for the construction of six-membered carbocyclic and heterocyclic systems, in most cases with high regio- and stereoselectivity. In this review, an insight into the most relevant advances on sustainable Diels-Alder reactions since 2010 is provided. Various environmentally benign solvent systems are discussed, namely bio-based derived solvents (such as glycerol and gluconic acid), polyethylene glycol, deep eutectic solvents, supercritical carbon dioxide, water and water-based aqueous systems. Issues such as method's scope, efficiency, selectivity and reaction mechanism, as well as sustainability, advantages and limitations of these reaction media, are addressed.
Collapse
Affiliation(s)
- Maria I. L. Soares
- University of Coimbra, Coimbra Chemistry Centre–Institute of Molecular Sciences and Department of Chemistry, 3004-535 Coimbra, Portugal;
| | | | - Teresa M. V. D. Pinho e Melo
- University of Coimbra, Coimbra Chemistry Centre–Institute of Molecular Sciences and Department of Chemistry, 3004-535 Coimbra, Portugal;
| |
Collapse
|
4
|
Dobler D, Leitner M, Moor N, Reiser O. 2‐Pyrone – A Privileged Heterocycle and Widespread Motif in Nature. European J Org Chem 2021. [DOI: 10.1002/ejoc.202101112] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Daniel Dobler
- Institut für Organische Chemie Universität Regensburg Universitätsstr. 31 93053 Regensburg Germany
| | - Michael Leitner
- Institut für Organische Chemie Universität Regensburg Universitätsstr. 31 93053 Regensburg Germany
| | - Natalija Moor
- Institut für Organische Chemie Universität Regensburg Universitätsstr. 31 93053 Regensburg Germany
| | - Oliver Reiser
- Institut für Organische Chemie Universität Regensburg Universitätsstr. 31 93053 Regensburg Germany
| |
Collapse
|
5
|
Benz S, Murkin AS. α-Ketol and α-iminol rearrangements in synthetic organic and biosynthetic reactions. Beilstein J Org Chem 2021; 17:2570-2584. [PMID: 34760025 PMCID: PMC8551875 DOI: 10.3762/bjoc.17.172] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Accepted: 10/07/2021] [Indexed: 11/24/2022] Open
Abstract
In the presence of a suitable acid or base, α-hydroxyaldehydes, ketones, and imines can undergo isomerization that features the 1,2-shift of an alkyl or aryl group. In the process, the hydroxy group is converted to a carbonyl and the aldehyde/ketone or imine is converted to an alcohol or amine. Such α-ketol/α-iminol rearrangements are used in a wide variety of synthetic applications including asymmetric synthesis, tandem reactions, and the total synthesis and biosynthesis of natural products. This review explores the use of α-ketol rearrangements in these contexts over the past two decades.
Collapse
Affiliation(s)
- Scott Benz
- Department of Chemistry, University at Buffalo, The State University of New York, Buffalo, New York 14260-3000, United States
| | - Andrew S Murkin
- Department of Chemistry, University at Buffalo, The State University of New York, Buffalo, New York 14260-3000, United States
| |
Collapse
|
6
|
Zou Y, Houk KN. Mechanisms and Dynamics of Synthetic and Biosynthetic Formation of Delitschiapyrones: Solvent Control of Ambimodal Periselectivity. J Am Chem Soc 2021; 143:11734-11740. [PMID: 34297552 PMCID: PMC9307257 DOI: 10.1021/jacs.1c05293] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
The mechanism and dynamics for the formation of the delitschiapyrone family of natural products are studied by density functional theory (DFT) calculations and quasiclassical molecular dynamics simulations with DFT and xTB. In the uncatalyzed reaction, delitschiapyrones A and B are formed by Diels-Alder reactions through a single transition state and a post-transition state bifurcation that favors formation of delitschiapyrone B. In water and most likely in the enzyme, the acidic hydroxyquinone ionizes, and the resulting conjugate base undergoes cycloaddition preferentially to delitschiapyrone A. We demonstrate a new type of biosynthetic transformation and variable selectivity from a (4 + 2)/(4 + 3) ambimodal transition state.
Collapse
Affiliation(s)
- Yike Zou
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095-1569, United States
| | - K N Houk
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095-1569, United States
| |
Collapse
|
7
|
Delayre B, Wang Q, Zhu J. Natural Product Synthesis Enabled by Domino Processes Incorporating a 1,2-Rearrangement Step. ACS CENTRAL SCIENCE 2021; 7:559-569. [PMID: 34056086 PMCID: PMC8155462 DOI: 10.1021/acscentsci.1c00075] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Indexed: 05/07/2023]
Abstract
The art of natural product total synthesis is closely associated with two major determinants: the development/application of novel chemical reactions and the innovation in strategic use of classic organic reactions. While purposely seeking/applying a new synthetic methodology allowing nonconventional bond disconnections could shorten the synthetic route, the development of domino processes composed of a series of well-established reactions could also lead to a concise, practical, and aesthetically appealing synthesis. As an important class of textbook reactions, the 1,2-anionotropic rearrangements discovered at the dawn of modern organic chemistry have important bearings not only on chemical synthesis but also on the conceptual breakthroughs in the field. In its basic form, the 1,2-shift affords nothing but a constitutional isomer of the starting material and is therefore not a complexity-generating transformation. However, such a simple 1,2-shift could in fact change the molecular topology if the precursor is cleverly designed. More dramatically, it can metamorphosize the structure of the substrate when it is combined with other transformations in a domino sequence. In this Outlook, we highlight recent examples of natural product synthesis featuring a key domino process incorporating a 1,2-anionotropic rearrangement. Specifically, domino reactions integrating Wagner-Meerwein, pinacol, α-ketol, α-aminoketone, α-iminol, or benzilic acid rearrangements will be discussed.
Collapse
|
8
|
Fernandes RA, Kumar P, Choudhary P. Advances in catalytic and protecting-group-free total synthesis of natural products: a recent update. Chem Commun (Camb) 2020; 56:8569-8590. [PMID: 32537619 DOI: 10.1039/d0cc02659j] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Catalytic processes in protecting-group-free syntheses of natural products are fast emerging towards achieving the goal of efficiency and economy in total synthesis. Present day sustainable development in synthesis of natural products does not permit the luxury of using stoichiometric reagents and protecting groups. Catalysis and step-economy can contribute significantly toward economy and efficiency of synthesis. This feature article details the ingenious efforts by many researchers in the last couple of years toward concise total syntheses, based on catalytic steps and protecting-group-free-strategies. These would again serve as guidelines in future development of reagents and catalysts aimed at achieving higher efficiency and chemoselectivity to the point that catalysis and protecting-group-free synthesis will be an accepted common practice.
Collapse
Affiliation(s)
- Rodney A Fernandes
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400 076, Maharashtra, India.
| | | | | |
Collapse
|
9
|
Lautié E, Russo O, Ducrot P, Boutin JA. Unraveling Plant Natural Chemical Diversity for Drug Discovery Purposes. Front Pharmacol 2020; 11:397. [PMID: 32317969 PMCID: PMC7154113 DOI: 10.3389/fphar.2020.00397] [Citation(s) in RCA: 78] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2019] [Accepted: 03/16/2020] [Indexed: 12/11/2022] Open
Abstract
The screening and testing of extracts against a variety of pharmacological targets in order to benefit from the immense natural chemical diversity is a concern in many laboratories worldwide. And several successes have been recorded in finding new actives in natural products, some of which have become new drugs or new sources of inspiration for drugs. But in view of the vast amount of research on the subject, it is surprising that not more drug candidates were found. In our view, it is fundamental to reflect upon the approaches of such drug discovery programs and the technical processes that are used, along with their inherent difficulties and biases. Based on an extensive survey of recent publications, we discuss the origin and the variety of natural chemical diversity as well as the strategies to having the potential to embrace this diversity. It seemed to us that some of the difficulties of the area could be related with the technical approaches that are used, so the present review begins with synthetizing some of the more used discovery strategies, exemplifying some key points, in order to address some of their limitations. It appears that one of the challenges of natural product-based drug discovery programs should be an easier access to renewable sources of plant-derived products. Maximizing the use of the data together with the exploration of chemical diversity while working on reasonable supply of natural product-based entities could be a way to answer this challenge. We suggested alternative ways to access and explore part of this chemical diversity with in vitro cultures. We also reinforced how important it was organizing and making available this worldwide knowledge in an "inventory" of natural products and their sources. And finally, we focused on strategies based on synthetic biology and syntheses that allow reaching industrial scale supply. Approaches based on the opportunities lying in untapped natural plant chemical diversity are also considered.
Collapse
Affiliation(s)
- Emmanuelle Lautié
- Centro de Valorização de Compostos Bioativos da Amazônia (CVACBA)-Instituto de Ciências Biológicas, Universidade Federal do Pará (UFPA), Belém, Brazil
| | - Olivier Russo
- Institut de Recherches Internationales SERVIER, Suresnes, France
| | - Pierre Ducrot
- Molecular Modelling Department, 'PEX Biotechnologie, Chimie & Biologie, Institut de Recherches SERVIER, Croissy-sur-Seine, France
| | - Jean A Boutin
- Institut de Recherches Internationales SERVIER, Suresnes, France
| |
Collapse
|
10
|
Han WB, Wang GY, Tang JJ, Wang WJ, Liu H, Gil RR, Navarro-Vázquez A, Lei X, Gao JM. Herpotrichones A and B, Two Intermolecular [4 + 2] Adducts with Anti-Neuroinflammatory Activity from a Herpotrichia Species. Org Lett 2019; 22:405-409. [DOI: 10.1021/acs.orglett.9b04099] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Wen-Bo Han
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry and Pharmacy, Northwest A&F University, Yangling, Shaanxi 712100, People’s Republic of China
| | - Guang-Yi Wang
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry and Pharmacy, Northwest A&F University, Yangling, Shaanxi 712100, People’s Republic of China
| | - Jiang-Jiang Tang
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry and Pharmacy, Northwest A&F University, Yangling, Shaanxi 712100, People’s Republic of China
| | - Wen-Ji Wang
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry and Pharmacy, Northwest A&F University, Yangling, Shaanxi 712100, People’s Republic of China
| | - Han Liu
- School of Pharmaceutical Sciences, South Central University for Nationalities, Wuhan, Hubei 430074, People’s Republic of China
| | - Roberto R. Gil
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Armando Navarro-Vázquez
- Departamento de Química Fundamental, Universidade Federal de Pernambuco, Avenida Professor Moraes Rego, 1235, Cidade Universitária, Recife, Pernambuco 50670-901, Brazil
| | - Xinxiang Lei
- School of Pharmaceutical Sciences, South Central University for Nationalities, Wuhan, Hubei 430074, People’s Republic of China
| | - Jin-Ming Gao
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry and Pharmacy, Northwest A&F University, Yangling, Shaanxi 712100, People’s Republic of China
| |
Collapse
|