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Wei Y, Wang G, Zhang Z, Li M, Ma N, Wu H, Zhang G. Cope Rearrangement of 1-Acyl-2-vinylcyclopropanes to Cyclohept-4-Enones. J Org Chem 2024. [PMID: 38166204 DOI: 10.1021/acs.joc.3c02319] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2024]
Abstract
Cycloheptenones are widespread in natural products and bioactive molecules. An efficient and convenient NaH-mediated Cope Rearrangement of doubly activated vinylcyclopropanes is reported for the synthesis of cyclohepten-4-ones. These flexible intramolecular reactions were applicable to a wide range of substrates and could be performed on gram scale. The derivatization of the product leads to short and highly efficient synthesis of some useful functional molecules.
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Affiliation(s)
- Yinhe Wei
- Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Henan Key Laboratory of Organic Functional Molecule and Drug Innovation, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang 453007, China
| | - Gang Wang
- Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Henan Key Laboratory of Organic Functional Molecule and Drug Innovation, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang 453007, China
| | - Zhiguo Zhang
- Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Henan Key Laboratory of Organic Functional Molecule and Drug Innovation, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang 453007, China
| | - Mengjuan Li
- Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Henan Key Laboratory of Organic Functional Molecule and Drug Innovation, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang 453007, China
| | - Nana Ma
- Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Henan Key Laboratory of Organic Functional Molecule and Drug Innovation, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang 453007, China
| | - Hao Wu
- Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Henan Key Laboratory of Organic Functional Molecule and Drug Innovation, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang 453007, China
| | - Guisheng Zhang
- Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Henan Key Laboratory of Organic Functional Molecule and Drug Innovation, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang 453007, China
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2
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Anjalikrishna PK, Gadre SR, Suresh CH. Topology of electrostatic potential and electron density reveals a covalent to non-covalent carbon-carbon bond continuum. Phys Chem Chem Phys 2023; 25:25191-25204. [PMID: 37721180 DOI: 10.1039/d3cp03268j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/19/2023]
Abstract
The covalent and non-covalent nature of carbon-carbon (CC) interactions in a wide range of molecular systems can be characterized using various methods, including the analysis of molecular electrostatic potential (MESP), represented as V(r), and the molecular electron density (MED), represented as ρ(r). These techniques provide valuable insights into the bonding between carbon atoms in different molecular environments. By uncovering a fundamental exponential relationship between the distance of the CC bond and the highest eigenvalue (λv1) of V(r) at the bond critical point (BCP), this study establishes the continuum model for all types of CC interactions, including transition states. The continuum model is further delineated into three distinct regions, namely covalent, borderline cases, and non-covalent, based on the gradient, , with the bond distance of the CC interaction. For covalent interactions, this parameter exhibits a more negative value than -5.0 a.u. Å-1, while for non-covalent interactions, it is less negative than -1.0 a.u. Å-1. Borderline cases, which encompass transition state structures, fall within the range of -1.0 to -5.0 a.u. Å-1. Furthermore, this study expands upon Popelier's analysis of the Laplacian of the MED, denoted as ∇2ρ, to encompass the entire spectrum of covalent, non-covalent, and borderline cases of CC interactions. Therefore, the present study presents compelling evidence supporting the concept of a continuum model for CC bonds in chemistry. Additionally, this continuum model is further explored within the context of C-N, C-O, C-S, N-N, O-O, and S-S interactions, albeit with a limited dataset.
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Affiliation(s)
- Puthannur K Anjalikrishna
- Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram, Kerala, 695019, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Shridhar R Gadre
- Departments of Chemistry and Scientific Computing, Modelling & Simulation, Savitribai Phule Pune University, Pune 411007, India
| | - Cherumuttathu H Suresh
- Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram, Kerala, 695019, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
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3
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Lavigne C, Gomes G, Pollice R, Aspuru-Guzik A. Guided discovery of chemical reaction pathways with imposed activation. Chem Sci 2022; 13:13857-13871. [PMID: 36544742 PMCID: PMC9710306 DOI: 10.1039/d2sc05135d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Accepted: 11/09/2022] [Indexed: 11/12/2022] Open
Abstract
Computational power and quantum chemical methods have improved immensely since computers were first applied to the study of reactivity, but the de novo prediction of chemical reactions has remained challenging. We show that complex reaction pathways can be efficiently predicted in a guided manner using chemical activation imposed by geometrical constraints of specific reactive modes, which we term imposed activation (IACTA). Our approach is demonstrated on realistic and challenging chemistry, such as a triple cyclization cascade involved in the total synthesis of a natural product, a water-mediated Michael addition, and several oxidative addition reactions of complex drug-like molecules. Notably and in contrast with traditional hand-guided computational chemistry calculations, our method requires minimal human involvement and no prior knowledge of the products or the associated mechanisms. We believe that IACTA will be a transformational tool to screen for chemical reactivity and to study both by-product formation and decomposition pathways in a guided way.
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Affiliation(s)
- Cyrille Lavigne
- Department of Computer Science, University of Toronto214 College St.TorontoOntarioM5T 3A1Canada
| | - Gabe Gomes
- Department of Computer Science, University of Toronto214 College St.TorontoOntarioM5T 3A1Canada,Chemical Physics Theory Group, Department of Chemistry, University of Toronto80 St George StTorontoOntarioM5S 3H6Canada
| | - Robert Pollice
- Department of Computer Science, University of Toronto214 College St.TorontoOntarioM5T 3A1Canada,Chemical Physics Theory Group, Department of Chemistry, University of Toronto80 St George StTorontoOntarioM5S 3H6Canada
| | - Alán Aspuru-Guzik
- Department of Computer Science, University of Toronto214 College St.TorontoOntarioM5T 3A1Canada,Chemical Physics Theory Group, Department of Chemistry, University of Toronto80 St George StTorontoOntarioM5S 3H6Canada,Department of Chemical Engineering & Applied Chemistry, University of Toronto200 College St.OntarioM5S 3E5Canada,Department of Materials Science & Engineering, University of Toronto184 College St.OntarioM5S 3E4Canada,Vector Institute for Artificial Intelligence661 University Ave Suite 710TorontoOntarioM5G 1M1Canada,Lebovic Fellow, Canadian Institute for Advanced Research (CIFAR)661 University AveTorontoOntarioM5GCanada
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4
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Zhao Q, Hsu HH, Savoie BM. Conformational Sampling for Transition State Searches on a Computational Budget. J Chem Theory Comput 2022; 18:3006-3016. [PMID: 35403426 DOI: 10.1021/acs.jctc.2c00081] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Qiyuan Zhao
- Davidson School of Chemical Engineering, Purdue University, West Lafayette, Indiana 47906, United States
| | - Hsuan-Hao Hsu
- Davidson School of Chemical Engineering, Purdue University, West Lafayette, Indiana 47906, United States
| | - Brett M. Savoie
- Davidson School of Chemical Engineering, Purdue University, West Lafayette, Indiana 47906, United States
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5
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Abstract
The ring-opening carbonyl-olefin metathesis of cyclobutenes to furnish γ,δ-unsaturated aldehydes-formal Claisen rearrangement products-is reported. The bistrifluoroacetic acid salt of 2,3-diazabicyclo[2.2.2]octane promotes these reactions efficiently with a variety of cyclobutenes and aldehydes, including aliphatic, α,β-unsaturated, aryl, and heteroaryl aldehydes. Catalytic reactions are also demonstrated.
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Affiliation(s)
- Maxwell G. Holl
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - Tristan H. Lambert
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
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6
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Schmitz G, Yönder Ö, Schnieder B, Schmid R, Hättig C. An automatized workflow from molecular dynamic simulation to quantum chemical methods to identify elementary reactions and compute reaction constants. J Comput Chem 2021; 42:2264-2282. [PMID: 34636424 DOI: 10.1002/jcc.26757] [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] [Indexed: 12/14/2022]
Abstract
We present an automatized workflow which, starting from molecular dynamics simulations, identifies reaction events, filters them, and prepares them for accurate quantum chemical calculations using, for example, Density Functional Theory (DFT) or Coupled Cluster methods. The capabilities of the automatized workflow are demonstrated by the example of simulations for the combustion of some polycyclic aromatic hydrocarbons (PAHs). It is shown how key elementary reaction candidates are filtered out of a much larger set of redundant reactions and refined further. The molecular species in question are optimized using DFT and reaction energies, barrier heights, and reaction rates are calculated. The setup is general enough to include at this stage configurational sampling, which can be exploited in the future. Using the introduced machinery, we investigate how the observed reaction types depend on the gas atmosphere used in the molecular dynamics simulation. For the re-optimization on the DFT level, we show how the additional information needed to switch from reactive force-field to electronic structure calculations can be filled in and study how well ReaxFF and DFT agree with each other and shine light on the perspective of using more accurate semi-empirical methods in the MD simulation.
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Affiliation(s)
- Gunnar Schmitz
- Computational Materials Chemistry Group, Ruhr-Universität Bochum, Bochum, Germany
| | - Özlem Yönder
- Lehrstuhl für Theoretische Chemie, Ruhr-Universität Bochum, Bochum, Germany
| | - Bastian Schnieder
- Computational Materials Chemistry Group, Ruhr-Universität Bochum, Bochum, Germany
| | - Rochus Schmid
- Computational Materials Chemistry Group, Ruhr-Universität Bochum, Bochum, Germany
| | - Christof Hättig
- Lehrstuhl für Theoretische Chemie, Ruhr-Universität Bochum, Bochum, Germany
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7
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Cui C, Dwyer BG, Liu C, Abegg D, Cai ZJ, Hoch DG, Yin X, Qiu N, Liu JQ, Adibekian A, Dai M. Total Synthesis and Target Identification of the Curcusone Diterpenes. J Am Chem Soc 2021; 143:4379-4386. [PMID: 33705657 DOI: 10.1021/jacs.1c00557] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The curcusone natural products are complex diterpenes featuring a characteristic [6-7-5] tricyclic carbon skeleton similar to the daphnane and tigliane diterpenes. Among them, curcusones A-D demonstrated potent anticancer activity against a broad spectrum of human cancer cell lines. Prior to this study, no total synthesis of the curcusones was achieved and their anticancer mode of action remained unknown. Herein, we report our synthetic and chemoproteomics studies of the curcusone diterpenes which culminate in the first total synthesis of several curcusone natural products and identification of BRCA1-associated ATM activator 1 (BRAT1) as a cellular target. Our efficient synthesis is highly convergent, builds upon cheap and abundant starting materials, features a thermal [3,3]-sigmatropic rearrangement and a novel FeCl3-promoted cascade reaction to rapidly construct the critical cycloheptadienone core of the curcusones, and led us to complete the first total synthesis of curcusones A and B in only 9 steps, C and D in 10 steps, and dimericursone A in 12 steps. The chemical synthesis of dimericursone A from curcusones C and D provided direct evidence to support the proposed Diels-Alder dimerization and cheletropic elimination biosynthetic pathway. Using an alkyne-tagged probe molecule, BRAT1, an important but previously "undruggable" oncoprotein, was identified as a key cellular target via chemoproteomics. We further demonstrate for the first time that BRAT1 can be inhibited by curcusone D, resulting in impaired DNA damage response, reduced cancer cell migration, potentiated activity of the DNA damaging drug etoposide, and other phenotypes similar to BRAT1 knockdown.
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Affiliation(s)
- Chengsen Cui
- Department of Chemistry and Center for Cancer Research, Purdue University, West Lafayette, Indiana 47907, United States
| | - Brendan G Dwyer
- Department of Chemistry, The Scripps Research Institute, 130 Scripps Way, Jupiter, Florida 33458, United States
| | - Chang Liu
- Department of Chemistry and Center for Cancer Research, Purdue University, West Lafayette, Indiana 47907, United States
| | - Daniel Abegg
- Department of Chemistry, The Scripps Research Institute, 130 Scripps Way, Jupiter, Florida 33458, United States
| | - Zhong-Jian Cai
- Department of Chemistry and Center for Cancer Research, Purdue University, West Lafayette, Indiana 47907, United States
| | - Dominic G Hoch
- Department of Chemistry, The Scripps Research Institute, 130 Scripps Way, Jupiter, Florida 33458, United States
| | - Xianglin Yin
- Department of Chemistry and Center for Cancer Research, Purdue University, West Lafayette, Indiana 47907, United States
| | - Nan Qiu
- Department of Chemistry, The Scripps Research Institute, 130 Scripps Way, Jupiter, Florida 33458, United States
| | - Jie-Qing Liu
- School of Medicine, Huaqiao University, Quanzhou 362021, P. R. China
| | - Alexander Adibekian
- Department of Chemistry, The Scripps Research Institute, 130 Scripps Way, Jupiter, Florida 33458, United States
| | - Mingji Dai
- Department of Chemistry and Center for Cancer Research, Purdue University, West Lafayette, Indiana 47907, United States
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8
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Semenova E, Lahtigui O, Ghiviriga I, Grenning AJ. [3,3] Ring Rearrangement of Oxo- or Aza-Bridged Bicyclo[3.2.1]octene-Based 1,5-Dienes. Org Lett 2021; 23:2263-2267. [PMID: 33689388 DOI: 10.1021/acs.orglett.1c00388] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We report that oxo- or aza-bridged alkylidenemalononitrile-cycloheptenes undergo a [3,3] ring rearrangement to yield cyclopenta-fused dihydro-furans or pyrroles. Described herein are the origins of the serendipitous discovery, scope studies, and representative functional group interconversion chemistry.
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Affiliation(s)
- Evgeniya Semenova
- Department of Chemistry, University of Florida, P.O. Box 117200, Gainesville, Florida 32611, United States
| | - Ouidad Lahtigui
- Department of Chemistry, University of Florida, P.O. Box 117200, Gainesville, Florida 32611, United States
| | - Ion Ghiviriga
- Department of Chemistry, University of Florida, P.O. Box 117200, Gainesville, Florida 32611, United States
| | - Alexander J Grenning
- Department of Chemistry, University of Florida, P.O. Box 117200, Gainesville, Florida 32611, United States
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9
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Young TA, Silcock JJ, Sterling AJ, Duarte F. autodE: Automated Calculation of Reaction Energy Profiles— Application to Organic and Organometallic Reactions. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202011941] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Tom A. Young
- Chemistry Research Laboratory University of Oxford Mansfield Road Oxford OX1 3TA UK
| | - Joseph J. Silcock
- Chemistry Research Laboratory University of Oxford Mansfield Road Oxford OX1 3TA UK
| | - Alistair J. Sterling
- Chemistry Research Laboratory University of Oxford Mansfield Road Oxford OX1 3TA UK
| | - Fernanda Duarte
- Chemistry Research Laboratory University of Oxford Mansfield Road Oxford OX1 3TA UK
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10
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Urabe D, Fukaya K. Systematic Search for Transition States in Complex Molecules: Computational Analyses of Regio- and Stereoselective Interflavan Bond Formation in Flavan-3-ols. HETEROCYCLES 2021. [DOI: 10.3987/rev-20-943] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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11
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Young TA, Silcock JJ, Sterling AJ, Duarte F. autodE: Automated Calculation of Reaction Energy Profiles— Application to Organic and Organometallic Reactions. Angew Chem Int Ed Engl 2020; 60:4266-4274. [DOI: 10.1002/anie.202011941] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Indexed: 01/18/2023]
Affiliation(s)
- Tom A. Young
- Chemistry Research Laboratory University of Oxford Mansfield Road Oxford OX1 3TA UK
| | - Joseph J. Silcock
- Chemistry Research Laboratory University of Oxford Mansfield Road Oxford OX1 3TA UK
| | - Alistair J. Sterling
- Chemistry Research Laboratory University of Oxford Mansfield Road Oxford OX1 3TA UK
| | - Fernanda Duarte
- Chemistry Research Laboratory University of Oxford Mansfield Road Oxford OX1 3TA UK
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12
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Liu M, Li P, Tang X, Luo X, Liu K, Zhang Y, Wang Q, Li G. Lemnardosinanes A-I: New Bioactive Sesquiterpenoids from Soft Coral Lemnalia sp. J Org Chem 2020; 86:970-979. [PMID: 33320671 DOI: 10.1021/acs.joc.0c02463] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Two rearranged nardosinane sesquiterpenoids with novel carbon skeletons, lemnardosinanes A (1) and B (2), and seven new nardosinane-related sesquiterpeniod lemnardosinanes C-I (3-9), together with a known compound 6,7-seco-13-nornardosinan (10), were isolated from the soft coral Lemnalia sp. collected from Xisha Islands of the South China Sea. Their structures were elucidated by comprehensive spectroscopic analyses, Mosher's method, Mo2(OAc)4-induced circular dichroism experiment, and quantum chemical calculations. Plausible biosynthetic pathways of 1-10 were proposed. Compounds 1 and 10 displayed in vivo angiogenesis promoting activity in a zebrafish model. Compounds 3 and 4 exhibited antiviral activity against the H1N1 virus with IC50 values of 10.9 and 41.5 μM, respectively.
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Affiliation(s)
- Mingyu Liu
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, People's Republic of China.,Laboratory of Marine Drugs and Biological Products, National Laboratory for Marine Science and Technology, Qingdao 266235, People's Republic of China
| | - Pinglin Li
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, People's Republic of China.,Laboratory of Marine Drugs and Biological Products, National Laboratory for Marine Science and Technology, Qingdao 266235, People's Republic of China
| | - Xuli Tang
- College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, People's Republic of China
| | - Xiangchao Luo
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, People's Republic of China.,Laboratory of Marine Drugs and Biological Products, National Laboratory for Marine Science and Technology, Qingdao 266235, People's Republic of China
| | - Kechun Liu
- Biology Institute, Qilu University of Technology (Shandong Academy of Sciences), Jinan 28789, People's Republic of China
| | - Yun Zhang
- Biology Institute, Qilu University of Technology (Shandong Academy of Sciences), Jinan 28789, People's Republic of China
| | - Qi Wang
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, People's Republic of China.,Laboratory of Marine Drugs and Biological Products, National Laboratory for Marine Science and Technology, Qingdao 266235, People's Republic of China.,Department of Natural Medicinal Chemistry and Pharmacognosy, School of Pharmacy, Qingdao University, Qingdao 266021, People's Republic of China
| | - Guoqiang Li
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, People's Republic of China.,Laboratory of Marine Drugs and Biological Products, National Laboratory for Marine Science and Technology, Qingdao 266235, People's Republic of China
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13
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Quapp W, Bofill JM. Some Mathematical Reasoning on the Artificial Force Induced Reaction Method. J Comput Chem 2020; 41:629-634. [PMID: 31792984 DOI: 10.1002/jcc.26115] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2019] [Revised: 11/01/2019] [Accepted: 11/04/2019] [Indexed: 11/07/2022]
Abstract
There are works of the Maeda-Morokuma group, which propose the artificial force induced reaction (AFIR) method (Maeda et al., J. Comput. Chem. 2014, 35, 166 and 2018, 39, 233). We study this important method from a theoretical point of view. The understanding of the proposers does not use the barrier breakdown point of the AFIR parameter, which usually is half of the reaction path between the minimum and the transition state which is searched for. Based on a comparison with the theory of Newton trajectories, we could better understand the method. It allows us to follow along some reaction pathways from minimum to saddle point, or vice versa. We discuss some well-known two-dimensional test surfaces where we calculate full AFIR pathways. If one has special AFIR curves at hand, one can also study the behavior of the ansatz. © 2019 The Authors. Journal of Computational Chemistry published by Wiley Periodicals, Inc.
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Affiliation(s)
- Wolfgang Quapp
- Leipzig University, Mathematisches Institut, Universität Leipzig, PF 100920, D-04009, Leipzig, Germany
| | - Josep Maria Bofill
- Universitat de Barcelona, Departament de Química Inorgànica i Orgànica, Universitat de Barcelona, and Institut de Química Teòrica i Computacional, Universitat de Barcelona, (IQTCUB), Martí i Franquès, 1, 08028, Barcelona, Spain
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14
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Wright AC, Stoltz BM. Enantioselective construction of the tricyclic core of curcusones A-D via a cross-electrophile coupling approach. Chem Sci 2019; 10:10562-10565. [PMID: 32055379 PMCID: PMC6988747 DOI: 10.1039/c9sc04127c] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2019] [Accepted: 09/30/2019] [Indexed: 11/21/2022] Open
Abstract
Herein we report our recent progress toward the enantioselective total synthesis of the diterpenoid natural products curcusones A-D by means of complementary Stetter annulation or ring-closing metathesis (RCM) disconnections. Using the latter approach, we have achieved the concise construction of the 5-7-6 carbocyclic core embedded in each member of the curcusone family. Essential to this route is the use of a cross-electrophile coupling strategy, which has not previously been harnessed in the context of natural product synthesis.
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Affiliation(s)
- Austin C Wright
- Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering , Division of Chemistry and Chemical Engineering , California Institute of Technology , Pasadena , CA 91125 , USA .
| | - Brian M Stoltz
- Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering , Division of Chemistry and Chemical Engineering , California Institute of Technology , Pasadena , CA 91125 , USA .
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15
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Wright AC, Lee CW, Stoltz BM. Progress toward the Enantioselective Synthesis of Curcusones A-D via a Divinylcyclopropane Rearrangement Strategy. Org Lett 2019; 21:9658-9662. [PMID: 31763859 DOI: 10.1021/acs.orglett.9b03829] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We report our iterative efforts toward the divergent total syntheses of curcusones A-D via Suzuki coupling, intramolecular cyclopropanation, and a key divinylcyclopropane rearrangement. Progress of our synthesis was repeatedly challenged by the highly substrate-dependent cyclopropanation step, which we could ultimately overcome by judicious choice of substituents on the six-membered ring fragment.
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Affiliation(s)
- Austin C Wright
- The Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering , California Institute of Technology , MC 101-20, Pasadena , California 91125 , United States
| | - Chung Whan Lee
- The Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering , California Institute of Technology , MC 101-20, Pasadena , California 91125 , United States
| | - Brian M Stoltz
- The Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering , California Institute of Technology , MC 101-20, Pasadena , California 91125 , United States
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