1
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Maeda S, Nakayama W, Saito Y, Sagano M, Goto M, Nakagawa-Goto K. Total Synthesis of a TNBC-Selective Cytotoxic Bromo Nor-eremophilane, PC-A, and Its Preliminary Structure-Activity Relationships. JOURNAL OF NATURAL PRODUCTS 2024; 87:861-868. [PMID: 38438305 DOI: 10.1021/acs.jnatprod.3c01075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/06/2024]
Abstract
PC-A (1), a bromo nor-eremophilane, showed selective antiproliferative activity against a triple-negative breast cancer (TNBC) cell line. This unique activity prompted us to establish a total synthesis to facilitate a structure-activity relationship (SAR) study and selectivity optimization. An enantioselective first total synthesis of 1 was achieved starting from (R)-carvone through a side chain extension with a Mukaiyama aldol reaction and decalin construction. The synthesized decalin derivatives and debromo PC-A (2) were evaluated for antiproliferative activity against five human tumor cell lines, including TNBC, to assess preliminary SAR correlations.
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Affiliation(s)
- Sayaka Maeda
- School of Pharmaceutical Sciences, College of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa, 920-1192, Japan
| | - Wakana Nakayama
- School of Pharmaceutical Sciences, College of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa, 920-1192, Japan
| | - Yohei Saito
- School of Pharmaceutical Sciences, College of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa, 920-1192, Japan
| | - Momoko Sagano
- School of Pharmaceutical Sciences, College of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa, 920-1192, Japan
| | - Masuo Goto
- Chemical Biology and Medicinal Chemistry, Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, North Carolina 27599-7568, United States
| | - Kyoko Nakagawa-Goto
- School of Pharmaceutical Sciences, College of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa, 920-1192, Japan
- Chemical Biology and Medicinal Chemistry, Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, North Carolina 27599-7568, United States
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2
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Yoshimoto FK, Guerrero SQ, Ho TM, Arman HD. Synthesis of 6β-hydroxy androgens from a 3,5-diene steroid precursor to test for cytochrome P450 3A4-catalyzed hydroxylation of androstenedione. Steroids 2023; 199:109298. [PMID: 37619673 DOI: 10.1016/j.steroids.2023.109298] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Revised: 08/15/2023] [Accepted: 08/21/2023] [Indexed: 08/26/2023]
Abstract
6β-Hydroxytestosterone is a biomarker for the activity of human cytochrome P450 3A4 (P450 3A4), the major drug metabolizing cytochrome P450 enzyme. Despite its significance, efficient routes for the chemical synthesis of 6β-hydroxytestosterone are rare. In this study, 6β-hydroxytestosterone was synthesized through the oxidation of a 3,5-diene precursor under the Uemura-Doyle reaction conditions using a dirhodium catalyst in the presence of tert-butylhydroperoxide. Mechanistic studies showed that some oxygen is incorporated from molecular oxygen and CH abstraction is partially rate-limiting. This reaction was used to synthesize 6β-hydroxyandrostenedione, which was used as a standard to test the hypothesis of whether P450 3A4 catalyzes the hydroxylation of androstenedione. Upon incubation of P450 3A4 with androstenedione, a hydroxylated product was formed, which matched the retention time of synthetic 6β-hydroxyandrostenedione. This reaction can be exploited to study other biochemical processes involving compounds with a 6 β -hydroxy-3-keto-Δ4 steroid backbone.
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Affiliation(s)
- Francis K Yoshimoto
- Department of Chemistry, The University of Texas at San Antonio (UTSA), San Antonio, TX 78249-0698, United States.
| | - Samantha Q Guerrero
- Department of Chemistry, The University of Texas at San Antonio (UTSA), San Antonio, TX 78249-0698, United States
| | - Tu M Ho
- Department of Chemistry, The University of Texas at San Antonio (UTSA), San Antonio, TX 78249-0698, United States
| | - Hadi D Arman
- Department of Chemistry, The University of Texas at San Antonio (UTSA), San Antonio, TX 78249-0698, United States
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3
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Zheng CY, Yue JM. Allylic hydroxylation of enones useful for the functionalization of relevant drugs and natural products. Nat Commun 2023; 14:2399. [PMID: 37100800 PMCID: PMC10133259 DOI: 10.1038/s41467-023-38154-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2023] [Accepted: 04/12/2023] [Indexed: 04/28/2023] Open
Abstract
Enones are privileged structural motifs in bioactive natural products and pharmaceuticals, but the γ-hydroxylation of enones is challenging. Here we show a mild and efficient method for the direct C(sp3)-H hydroxylation of enones via visible-light-induced hydrogen-atom transfer (HAT), which facilitates γ-hydroxylation of primary, secondary, and tertiary C-H bonds of different enones without involving metal and peroxide. The mechanism study shows that Na2-eosin Y serves as both the photocatalyst and the source of catalytic bromine radical species in the HAT-based catalytic cycle, and finally sacrifices itself completely by oxidative degradation to produce bromine radical and a major product phthalic anhydride in an environmentally friendly way. This scalable method was demonstrated by plenty of substrates (41 examples) including 10 clinical drugs and 15 natural products to be useful for the late-stage functionalization of enone-containing compounds, and, in particular, has potential application in industry for large-scale production.
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Affiliation(s)
- Cheng-Yu Zheng
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Shanghai, 201203, China
- University of Chinese Academy of Sciences, No.19A Yuquan Road, Beijing, 100049, China
| | - Jian-Min Yue
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Shanghai, 201203, China.
- University of Chinese Academy of Sciences, No.19A Yuquan Road, Beijing, 100049, China.
- Research Units of Discovery of New Drug Lead Molecules, Chinese Academy of Medical Sciences, Shanghai, 201203, China.
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4
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seco-Sesquiterpenes and acorane-type sesquiterpenes with antiviral activity from the twigs and leaves of Illicium henryi Diels. Bioorg Chem 2023; 131:106324. [PMID: 36563414 DOI: 10.1016/j.bioorg.2022.106324] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Revised: 12/04/2022] [Accepted: 12/11/2022] [Indexed: 12/15/2022]
Abstract
Chemical investigation of an alcohol extract from the twigs and leaves of Illicium henryi Diels resulted in the isolation of two new acorane-related seco-sesquiterpenes (1 and 3), two new acorane-related seco-norsesquiterpenes (2 and 4), one new 2-epi-cedrane sesquiterpene (5), eight new acorane-type sesquiterpenes (6-13), and a known major constituent of acorenone B (14). Their structures were established by interpreting extensive spectroscopic data, including HRESIMS, NMR (1H and 13C NMR, 1H-1H COSY, HSQC, and HMBC), and NOE difference spectra analysis. The absolute configurations of 1, 2, 4-7, 9, 10, and 14 were determined by X-ray crystallography, while chemical transformation methods were performed with compound 14 as the starting material to elegantly solve the absolute configuration issue of compounds 8 and 11-13. Notably, 1 and 2 are seco-sesquiterpenes that are related to acorane and possess an unusual ketal-linked hemiacetal in a 6,8-dioxabicyclo[3.2.1]octan-7-ol scaffold ring system. Plausible biosynthetic pathways for compounds 1-14, which were derived from the acorane skeleton, were proposed. All the isolated compounds (1-14) were evaluated for their antiviral and cytotoxic activities.
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5
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Macías-Benítez P, Sierra-Padilla A, Yeste MP, Palacios-Santander JM, Cubillana-Aguilera L, Gatica JM, Vidal H, Guerra FM, Moreno-Dorado FJ. Ultrasound-promoted synthesis of a copper-iron-based catalyst for the microwave-assisted acyloxylation of 1,4-dioxane and cyclohexene. Org Biomol Chem 2023; 21:590-599. [PMID: 36545812 DOI: 10.1039/d2ob02117j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
A copper-iron-based catalyst has been prepared by a low-temperature co-precipitation and sonication method. The use of high-energy ultrasound reduces the time required for the preparation process from one workweek to one day with respect to the catalysts obtained by conventional coprecipitation and thermal treatment methods. The resulting material has been characterized at compositional, textural, structural, and chemical levels by ICP-AES, BET, SEM-EDS, XRD, TEM, and FTIR among other techniques. The material shows catalytic activity in the acyloxylation reaction of 1,4-dioxane and cyclohexene under microwave irradiation. In parallel with the optimized catalyst synthesis, the use of microwaves allowed for a substantial improvement in the outcome of the reaction in terms of cleanliness, yield, and time.
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Affiliation(s)
- Pablo Macías-Benítez
- Departamento de Química Orgánica, Facultad de Ciencias, Universidad de Cádiz, 11510 Puerto Real, Cádiz, Spain. .,Instituto de Biomoléculas (INBIO), Universidad de Cádiz, 11510 Puerto Real, Cádiz, Spain
| | - Alfonso Sierra-Padilla
- Departamento de Química Orgánica, Facultad de Ciencias, Universidad de Cádiz, 11510 Puerto Real, Cádiz, Spain. .,Departamento de Química Analítica Universidad de Cádiz, 11510 Puerto Real, Cádiz, Spain.,Instituto de Microscopía Electrónica y Materiales (IMEYMAT), Universidad de Cádiz, 11510 Puerto Real, Cádiz, Spain
| | - M Pilar Yeste
- Departamento de Ciencia de los Materiales e Ingeniería Metalúrgica y Química Inorgánica, Universidad de Cadiz, 11510 Puerto Real, Cádiz, Spain.,Instituto de Microscopía Electrónica y Materiales (IMEYMAT), Universidad de Cádiz, 11510 Puerto Real, Cádiz, Spain
| | - José María Palacios-Santander
- Departamento de Química Analítica Universidad de Cádiz, 11510 Puerto Real, Cádiz, Spain.,Instituto de Microscopía Electrónica y Materiales (IMEYMAT), Universidad de Cádiz, 11510 Puerto Real, Cádiz, Spain
| | - Laura Cubillana-Aguilera
- Departamento de Química Analítica Universidad de Cádiz, 11510 Puerto Real, Cádiz, Spain.,Instituto de Microscopía Electrónica y Materiales (IMEYMAT), Universidad de Cádiz, 11510 Puerto Real, Cádiz, Spain
| | - José M Gatica
- Departamento de Ciencia de los Materiales e Ingeniería Metalúrgica y Química Inorgánica, Universidad de Cadiz, 11510 Puerto Real, Cádiz, Spain.,Instituto de Microscopía Electrónica y Materiales (IMEYMAT), Universidad de Cádiz, 11510 Puerto Real, Cádiz, Spain
| | - Hilario Vidal
- Departamento de Ciencia de los Materiales e Ingeniería Metalúrgica y Química Inorgánica, Universidad de Cadiz, 11510 Puerto Real, Cádiz, Spain.,Instituto de Microscopía Electrónica y Materiales (IMEYMAT), Universidad de Cádiz, 11510 Puerto Real, Cádiz, Spain
| | - Francisco M Guerra
- Departamento de Química Orgánica, Facultad de Ciencias, Universidad de Cádiz, 11510 Puerto Real, Cádiz, Spain. .,Instituto de Biomoléculas (INBIO), Universidad de Cádiz, 11510 Puerto Real, Cádiz, Spain
| | - F Javier Moreno-Dorado
- Departamento de Química Orgánica, Facultad de Ciencias, Universidad de Cádiz, 11510 Puerto Real, Cádiz, Spain. .,Instituto de Biomoléculas (INBIO), Universidad de Cádiz, 11510 Puerto Real, Cádiz, Spain
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6
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Halang M, Maier ME. Formal Total Synthesis of Salvinorin A. ChemistryOpen 2022; 11:e202200015. [PMID: 35218166 PMCID: PMC9535499 DOI: 10.1002/open.202200015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Revised: 02/08/2022] [Indexed: 11/17/2022] Open
Abstract
The generation of the quaternary stereocenter at the C9 position of salvinorin A precursors by the Claisen rearrangement was investigated. The required allyl alcohol was prepared from a Wieland-Miescher ketone using a known γ-hydroxylation, reduction of the enone double bond, cyanohydrin formation, and elimination, yielding an unsaturated nitrile. A two-step reduction led to the required allyl alcohol. The subsequent Johnson-Claisen rearrangement provided a mixture of two diastereomeric 1,4-unsaturated esters in a ratio of around 2.6 : 1. The major isomer could be converted to a key intermediate of the Hagiwara synthesis of salvinorin A.
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Affiliation(s)
- Marc Halang
- Institut für Organische ChemieEberhard Karls Universität TübingenAuf der Morgenstelle 1872076TübingenGermany
| | - Martin E. Maier
- Institut für Organische ChemieEberhard Karls Universität TübingenAuf der Morgenstelle 1872076TübingenGermany
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7
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Okazaki K, Takeda M, Yamaguch E, Heishima K, Itoh A. Rapid Total Synthesis of Petasin and Isopetasin. Tetrahedron Lett 2022. [DOI: 10.1016/j.tetlet.2022.154092] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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8
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Copper-iron mixed oxide supported onto cordierite honeycomb as a heterogeneous catalyst in the Kharasch-Sosnovsky oxidation of cyclohexene. Catal Today 2022. [DOI: 10.1016/j.cattod.2021.10.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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9
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Carlone A, Nori V, Sinibaldi A, Pesciaioli F. Impact of Design of Experiments in the Optimisation of Catalytic Reactions in Academia. SYNTHESIS-STUTTGART 2022. [DOI: 10.1055/a-1736-6703] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
AbstractDesign of Experiments (DoE) is extensively and routinely used in industry; however, in recent decades, it has gained increasing interest from academia in organic synthesis. The use of chemometrics is an attractive strategy to find the real optimum in chemical reactions, especially when affected by several variables. DoE has been applied in a growing number of synthetic transformations over the years, where it undoubtedly helps in the process of optimisation, saving costs and time. This review concisely discusses the chemometric basis of Design of Experiments and highlights several examples in which DoE is applied in organic synthesis.1 Introduction2 Chemometric Basis of DoE3 DoE Applied in Catalysis: Selected Examples3.1 DoE in Metal Catalysis3.2 DoE in Biocatalysis3.3 DoE in Organocatalysis4 Conclusions
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10
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Svenningsen EB, Ottosen RN, Jørgensen KH, Nisavic M, Larsen CK, Hansen BK, Wang Y, Lindorff-Larsen K, Tørring T, Hacker SM, Palmfeldt J, Poulsen TB. The covalent reactivity of functionalized 5-hydroxy-butyrolactams is the basis for targeting of fatty acid binding protein 5 (FABP5) by the neurotrophic agent MT-21. RSC Chem Biol 2022; 3:1216-1229. [PMID: 36320884 PMCID: PMC9533406 DOI: 10.1039/d2cb00161f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Accepted: 09/02/2022] [Indexed: 11/21/2022] Open
Abstract
Covalently acting compounds experience a strong interest within chemical biology both as molecular probes in studies of fundamental biological mechanisms and/or as novel drug candidates. In this context, the identification of new classes of reactive groups is particularly important as these can expose novel reactivity modes and, consequently, expand the ligandable proteome. Here, we investigated the electrophilic reactivity of the 3-acyl-5-hydroxy-1,5-dihydro-2H-pyrrole-2-one (AHPO) scaffold, a heterocyclic motif that is e.g. present in various bioactive natural products. Our investigations were focused on the compound MT-21 – a simplified structural analogue of the natural product epolactaene – which is known to have both neurotrophic activity and ability to trigger apoptotic cell death. We found that the central N-acyl hemiaminal group of MT-21 can function as an electrophilic centre enabling divergent reactivity with both amine- and thiol-based nucleophiles, which furthermore translated to reactivity with proteins in both cell lysates and live cells. We found that in live cells MT-21 strongly engaged the lipid transport protein fatty acid-binding protein 5 (FABP5) by direct binding to a cysteine residue in the bottom of the ligand binding pocket. Through preparation of a series of MT-21 derivatives, we probed the specificity of this interaction which was found to be strongly dependent on subtle structural changes. Our study suggests that MT-21 may be employed as a tool compound in future studies of the biology of FABP5, which remains incompletely understood. Furthermore, our study has also made clear that other natural products containing the AHPO-motif may likewise possess covalent reactivity and that this property may underlie their biological activity. In this work, it is shown that an N-acyl hemiaminal motif present in many natural products can function as an electrophilic centre, mediating covalent reactivity in biological systems, reacting with both thiols and amines.![]()
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Affiliation(s)
| | - Rasmus N. Ottosen
- Department of Chemistry, Aarhus University, DK-8000, Aarhus C, Denmark
| | | | - Marija Nisavic
- Department of Chemistry, Aarhus University, DK-8000, Aarhus C, Denmark
- Department of Clinical Medicine – Research Unit for Molecular Medicine, Aarhus University Hospital, DK-8200 Aarhus N, Denmark
| | - Camilla K. Larsen
- Department of Engineering – Microbial Biosynthesis, Aarhus University, DK-8000 Aarhus C, Denmark
| | - Bente K. Hansen
- Department of Chemistry, Aarhus University, DK-8000, Aarhus C, Denmark
- Interdisciplinary Nanoscience Center (iNANO), Aarhus University, DK-8000 Aarhus C, Denmark
| | - Yong Wang
- Copenhagen Biocenter, University of Copenhagen, DK-2200 Copenhagen N, Denmark
| | | | - Thomas Tørring
- Department of Engineering – Microbial Biosynthesis, Aarhus University, DK-8000 Aarhus C, Denmark
| | - Stephan M. Hacker
- Leiden Institute of Chemistry, Leiden University, NL-2333 CC Leiden, The Netherlands
| | - Johan Palmfeldt
- Department of Clinical Medicine – Research Unit for Molecular Medicine, Aarhus University Hospital, DK-8200 Aarhus N, Denmark
| | - Thomas B. Poulsen
- Department of Chemistry, Aarhus University, DK-8000, Aarhus C, Denmark
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11
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Affiliation(s)
- Shaomin Fu
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University 29 Wangjiang Rd Chengdu Sichuan 610064 China
| | - Bo Liu
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University 29 Wangjiang Rd Chengdu Sichuan 610064 China
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12
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Fernandes RA, Kumar P, Choudhary P. Evolution of Strategies in Protecting‐Group‐Free Synthesis of Natural Products: A Recent Update. European J Org Chem 2020. [DOI: 10.1002/ejoc.202001246] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Rodney A. Fernandes
- Department of Chemistry Indian Institute of Technology Bombay 400076 Mumbai, Powai Maharashtra India
| | - Praveen Kumar
- Department of Chemistry Indian Institute of Technology Bombay 400076 Mumbai, Powai Maharashtra India
| | - Priyanka Choudhary
- Department of Chemistry Indian Institute of Technology Bombay 400076 Mumbai, Powai Maharashtra India
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13
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Abstract
As a natural diterpenoid, crotophorbolone possesses a challenging trans,trans-5/7/6 framework decorated with six contiguous stereogenic centers and is structurally and biogenetically related to tigliane-type diterpenoids with intriguing bioactivities such as phorbol and prostratin. Based on the convergent strategy, we completed an eighteen-step total synthesis of crotophorbolone starting from (−)-carvone and (+)-dimethyl-2,3-O-isopropylidene-l-tartrate. The key elements of the synthesis involve expedient installation of the six-membered ring and the five-membered ring with multiple functional groups at an early stage, cyclization of the seven-membered ring through alkenylation of the ketone between the five-membered ring and the six-membered ring, functional group-sensitive ring-closing metathesis and final selective introduction of hydroxyls at C20 and C4. Convergent total synthesis of crotophorbolone was accomplished in 18 longest linear steps. Observation of unexpected thermodynamic stability of a cis,trans-5/7/6 tricycle would benefit synthetic design of tigliane- and daphnane-related diterpenoids.![]()
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Affiliation(s)
- Tianzi Yu
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University 29 Wangjiang Rd. Chengdu Sichuan 610064 China
| | - Ying Sun
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University 29 Wangjiang Rd. Chengdu Sichuan 610064 China
| | - Canhui Tu
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University 29 Wangjiang Rd. Chengdu Sichuan 610064 China
| | - Ting Chen
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University 29 Wangjiang Rd. Chengdu Sichuan 610064 China
| | - Shaomin Fu
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University 29 Wangjiang Rd. Chengdu Sichuan 610064 China
| | - Bo Liu
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University 29 Wangjiang Rd. Chengdu Sichuan 610064 China
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14
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Álvarez JM, Jorge ZD, Massanet GM. Study of the Oxidative Cleavage Proposed in the Biogenesis of Transtaganolides/Basiliolides: Pyran-2-one Aromaticity-Mediated Regioselective Control and Biogenetic Implications. European J Org Chem 2020. [DOI: 10.1002/ejoc.201901894] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- José María Álvarez
- Department of Organic Chemistry; University of Cádiz; 11510 Puerto Real Spain
| | - Zacarías D. Jorge
- Department of Organic Chemistry; University of Cádiz; 11510 Puerto Real Spain
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15
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Asthana M, Syiemlieh I, Kumar A, Lal RA. Direct oxidation of alcohols catalysed by heterometallic complex [CuNi(bz)3(bpy)2]ClO4 to aldehydes and ketones mediated by hydrogen peroxide as a terminal oxidant. Inorganica Chim Acta 2020. [DOI: 10.1016/j.ica.2019.119286] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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16
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Fath V, Kockmann N, Otto J, Röder T. Self-optimising processes and real-time-optimisation of organic syntheses in a microreactor system using Nelder–Mead and design of experiments. REACT CHEM ENG 2020. [DOI: 10.1039/d0re00081g] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Comparing an enhanced simplex algorithm with model-free design of experiments, this work presents a flexible platform for multi-objective, real-time optimisation.
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Affiliation(s)
- Verena Fath
- Department of Biochemical and Chemical Engineering
- Equipment Design
- TU Dortmund University
- 44227 Dortmund
- Germany
| | - Norbert Kockmann
- Department of Biochemical and Chemical Engineering
- Equipment Design
- TU Dortmund University
- 44227 Dortmund
- Germany
| | - Jürgen Otto
- Institute for Applied Thermo- and Fluid Dynamics
- Mannheim University of Applied Sciences
- 68163 Mannheim
- Germany
| | - Thorsten Röder
- Institute of Chemical Process Engineering
- Mannheim University of Applied Sciences
- 68163 Mannheim
- Germany
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17
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Zhang P, Li Y, Yan Z, Gong J, Yang Z. Asymmetric Total Synthesis of (-)-Pavidolide B via a Thiyl-Radical-Mediated [3 + 2] Annulation Reaction. J Org Chem 2019; 84:15958-15971. [PMID: 31749362 DOI: 10.1021/acs.joc.9b02230] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
The development of an efficient strategy for the asymmetric total synthesis of the bioactive marine natural product (-)-pavidolide B is described in detail. The development process and detours leading to the key thiyl-radical-mediated [3 + 2] annulation reaction, which constructed the central C ring with four contiguous stereogenic centers in one step, are depicted. Subsequently, the seven-membered D ring is constructed via a ring-closing metathesis reaction followed by a Rh(III)-catalyzed isomerization. This strategy enables the total synthesis of (-)-pavidolide B in the longest linear sequence of 10 steps.
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Affiliation(s)
- Pengpeng Zhang
- Key Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology , Peking University Shenzhen Graduate School , Shenzhen 518055 , China
| | - Yuanhe Li
- State Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education and Beijing National Laboratory for Molecular Science (BNLMS) , College of Chemistry and the Peking University , Beijing 100871 , China
| | - Zhiming Yan
- Key Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology , Peking University Shenzhen Graduate School , Shenzhen 518055 , China
| | - Jianxian Gong
- Key Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology , Peking University Shenzhen Graduate School , Shenzhen 518055 , China.,Laboratory for Marine Drugs and Bioproducts of Qingdao National Laboratory for Marine Science and Technology , Qingdao 266237 , China
| | - Zhen Yang
- Key Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology , Peking University Shenzhen Graduate School , Shenzhen 518055 , China.,State Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education and Beijing National Laboratory for Molecular Science (BNLMS) , College of Chemistry and the Peking University , Beijing 100871 , China.,Laboratory for Marine Drugs and Bioproducts of Qingdao National Laboratory for Marine Science and Technology , Qingdao 266237 , China
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18
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Rao P, Hu J, Xuan J, Ding H. Total Synthesis of (−)-Pavidolide B: A Ring Contraction Strategy. J Org Chem 2019; 84:9385-9392. [DOI: 10.1021/acs.joc.9b01308] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Peirong Rao
- Department of Chemistry, Zhejiang University, Hangzhou 310058, China
| | - Jialei Hu
- Department of Chemistry, Zhejiang University, Hangzhou 310058, China
| | - Jun Xuan
- Department of Chemistry, Zhejiang University, Hangzhou 310058, China
| | - Hanfeng Ding
- Department of Chemistry, Zhejiang University, Hangzhou 310058, China
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19
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Salvio R, Placidi S, Sinibaldi A, Di Sabato A, Buscemi DC, Rossi A, Antenucci A, Malkov A, Bella M. Organocatalytic Synthesis of Benzazetidines by Trapping Hemiaminals with Protecting Groups. J Org Chem 2019; 84:7395-7404. [PMID: 31091096 DOI: 10.1021/acs.joc.9b01148] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Benzazetidines are highly strained and inherently unstable heterocycles. There are only few methodologies for assembling these compounds. Here, a protocol is presented to trap an elusive cyclic, four-membered hemiaminal structure. This method affords several benzazetidines in moderate to good yields (up to 81%), and it uses inexpensive materials and does not require catalysts based on transition metals. The high ring strain energy of these benzazetidine systems was estimated by density functional theory calculations to be about 32 kcal mol-1. This synthesis can be applied also on gram scale with reaction yield essentially unchanged.
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Affiliation(s)
- Riccardo Salvio
- Dipartimento di Chimica , Sapienza Università di Roma , P.le Aldo Moro 5 , 00185 Roma , Italy.,ISB-CNR Sezione Meccanismi di Reazione , Sapienza Università di Roma , 00185 Roma , Italy
| | - Simone Placidi
- Dipartimento di Chimica , Sapienza Università di Roma , P.le Aldo Moro 5 , 00185 Roma , Italy
| | - Arianna Sinibaldi
- Dipartimento di Chimica , Sapienza Università di Roma , P.le Aldo Moro 5 , 00185 Roma , Italy
| | - Antonio Di Sabato
- Dipartimento di Chimica , Sapienza Università di Roma , P.le Aldo Moro 5 , 00185 Roma , Italy
| | - Dario C Buscemi
- Dipartimento di Chimica , Sapienza Università di Roma , P.le Aldo Moro 5 , 00185 Roma , Italy
| | - Andrea Rossi
- Dipartimento di Chimica , Sapienza Università di Roma , P.le Aldo Moro 5 , 00185 Roma , Italy
| | - Achille Antenucci
- Dipartimento di Chimica , Sapienza Università di Roma , P.le Aldo Moro 5 , 00185 Roma , Italy
| | - Andrei Malkov
- Department of Chemistry , Loughborough University , LE11 3TU Loughborough , U.K
| | - Marco Bella
- Dipartimento di Chimica , Sapienza Università di Roma , P.le Aldo Moro 5 , 00185 Roma , Italy
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20
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He C, Xuan J, Rao P, Xie P, Hong X, Lin X, Ding H. Total Syntheses of (+)‐Sarcophytin, (+)‐Chatancin, (−)‐3‐Oxochatancin, and (−)‐Pavidolide B: A Divergent Approach. Angew Chem Int Ed Engl 2019; 58:5100-5104. [DOI: 10.1002/anie.201900782] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2019] [Revised: 02/20/2019] [Indexed: 11/11/2022]
Affiliation(s)
- Chuan He
- Department of ChemistryZhejiang University Hangzhou 310058 China
| | - Jun Xuan
- Department of ChemistryZhejiang University Hangzhou 310058 China
| | - Peirong Rao
- Department of ChemistryZhejiang University Hangzhou 310058 China
| | - Pei‐Pei Xie
- Department of ChemistryZhejiang University Hangzhou 310058 China
| | - Xin Hong
- Department of ChemistryZhejiang University Hangzhou 310058 China
| | - Xufeng Lin
- Department of ChemistryZhejiang University Hangzhou 310058 China
| | - Hanfeng Ding
- Department of ChemistryZhejiang University Hangzhou 310058 China
- State Key Laboratory of Elemento-Organic ChemistryNankai University Tianjin 300071 China
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21
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Total Syntheses of (+)‐Sarcophytin, (+)‐Chatancin, (−)‐3‐Oxochatancin, and (−)‐Pavidolide B: A Divergent Approach. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201900782] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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22
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Masnyk M, Butkiewicz A, Górecki M, Luboradzki R, Paluch P, Potrzebowski MJ, Frelek J. In Depth Analysis of Chiroptical Properties of Enones Derived from Abietic Acid. J Org Chem 2018; 83:3547-3561. [PMID: 29490457 DOI: 10.1021/acs.joc.7b02911] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
With the use of inexpensive commercially available abietic acid, a whole series of abietane enones were prepared in high yields. The structures of all the products obtained were determined by comprehensive spectroscopic analysis with particular emphasis on the use of advanced NMR techniques, comparison with previously reported data and, where possible, by single crystal X-ray diffraction. However, in cases where X-ray crystallography was not applicable or compounds tested were unstable, a final stereochemical assignment could be inferred only by electronic circular dichroism (ECD) supported by vibrational circular dichroism to increase credibility. To reveal the relationship between structure and chiroptical properties, we used combined experimental and theoretical analysis of geometries, structural parameters, and chiroptical properties of all enones synthesized. A thorough analysis of their conformational flexibility by examining the effect of solvent and temperature on the ECD spectra was also used to achieve desired objectives. As a result, the impact of substituents adjacent to the enone chromophore on the conformation was determined by demonstrating that even slight changes in the position of hydroxyl and isopropyl groups attached to carbon C13 may substantially affect ECD curves' pattern, leading in some cases to Cotton effects sign reversal.
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Affiliation(s)
- Marek Masnyk
- Institute of Organic Chemistry , Polish Academy of Sciences , Kasprzaka 44/52 , 01-224 Warsaw , Poland
| | - Aleksandra Butkiewicz
- Institute of Organic Chemistry , Polish Academy of Sciences , Kasprzaka 44/52 , 01-224 Warsaw , Poland
| | - Marcin Górecki
- Institute of Organic Chemistry , Polish Academy of Sciences , Kasprzaka 44/52 , 01-224 Warsaw , Poland
| | - Roman Luboradzki
- Institute of Physical Chemistry , Polish Academy of Sciences , Kasprzaka 44/52 , 01-224 Warsaw , Poland
| | - Piotr Paluch
- Centre of Molecular and Macromolecular Studies , Polish Academy of Sciences , Sienkiewicza 112 , 90-363 Lodz , Poland
| | - Marek J Potrzebowski
- Centre of Molecular and Macromolecular Studies , Polish Academy of Sciences , Sienkiewicza 112 , 90-363 Lodz , Poland
| | - Jadwiga Frelek
- Institute of Organic Chemistry , Polish Academy of Sciences , Kasprzaka 44/52 , 01-224 Warsaw , Poland
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23
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Deng L, Jin L, Dong G. Fused-Ring Formation by an Intramolecular "Cut-and-Sew" Reaction between Cyclobutanones and Alkynes. Angew Chem Int Ed Engl 2018; 57:2702-2706. [PMID: 29338109 PMCID: PMC5849476 DOI: 10.1002/anie.201712487] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2017] [Revised: 01/03/2017] [Indexed: 11/10/2022]
Abstract
The development of a catalytic intramolecular "cut-and-sew" transformation between cyclobutanones and alkynes to construct cyclohexenone-fused rings is described herein. The challenge arises from the need for selective coupling at the more sterically hindered proximal position, and can be addressed by using an electron-rich, but less bulky, phosphine ligand. The control experiment and 13 C-labelling study suggest that the reaction may start with cleavage of the less hindered distal C-C bond of cyclobutanones, followed by decarbonylation and CO reinsertion to enable Rh insertion at the more hindered proximal position.
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Affiliation(s)
- Lin Deng
- Department of Chemistry, University of Chicago, Chicago, IL, 60637, USA
| | - Likun Jin
- Department of Chemistry, University of Chicago, Chicago, IL, 60637, USA
- College of Chemical Engineering, Nanjing University of Science & Technology, Nanjing, 210094, P. R. China
| | - Guangbin Dong
- Department of Chemistry, University of Chicago, Chicago, IL, 60637, USA
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24
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Hung K, Hu X, Maimone TJ. Total synthesis of complex terpenoids employing radical cascade processes. Nat Prod Rep 2018; 35:174-202. [PMID: 29417970 PMCID: PMC5858714 DOI: 10.1039/c7np00065k] [Citation(s) in RCA: 121] [Impact Index Per Article: 20.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Covering: 2011-2017Radical cyclizations have a rich history in organic chemistry and have been particularly generous to the field of natural product synthesis. Owing to their ability to operate in highly congested molecular quarters, and with significant functional group compatibility, these transformations have enabled the synthesis of numerous polycyclic terpenoid natural products over the past several decades. Moreover, when programmed accordingly into a synthetic plan, radical cascade processes can be used to rapidly assemble molecular complexity, much in the same way nature rapidly constructs terpene frameworks through cationic cyclization pathways. This review highlights recent total syntheses of complex terpenoids (from 2011-2017) employing C-C bond-forming radical cascade sequences.
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Affiliation(s)
- Kevin Hung
- Department of Chemistry, University of California - Berkeley, Berkeley, CA 94720, USA.
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25
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Deng L, Jin L, Dong G. Fused-Ring Formation by an Intramolecular “Cut-and-Sew” Reaction between Cyclobutanones and Alkynes. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201712487] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Lin Deng
- Department of Chemistry; University of Chicago; Chicago IL 60637 USA
| | - Likun Jin
- Department of Chemistry; University of Chicago; Chicago IL 60637 USA
- College of Chemical Engineering; Nanjing University of Science & Technology; Nanjing 210094 P. R. China
| | - Guangbin Dong
- Department of Chemistry; University of Chicago; Chicago IL 60637 USA
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26
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Nannini LJ, Nemat SJ, Carreira EM. Total Synthesis of (+)‐Sarcophytin. Angew Chem Int Ed Engl 2018; 57:823-826. [DOI: 10.1002/anie.201711372] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2017] [Indexed: 11/05/2022]
Affiliation(s)
- Leonardo J. Nannini
- Laboratorium für Organische ChemieETH Zurich, HCl H335 Vladimir-Prelog-Weg 3 8093 Zürich Switzerland
| | - Suren J. Nemat
- Laboratorium für Organische ChemieETH Zurich, HCl H335 Vladimir-Prelog-Weg 3 8093 Zürich Switzerland
| | - Erick M. Carreira
- Laboratorium für Organische ChemieETH Zurich, HCl H335 Vladimir-Prelog-Weg 3 8093 Zürich Switzerland
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27
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Yang Y, Fan X, Cao H, Chu S, Zhang X, Xu Q, Yu L. Fabrication of Se/C using carbohydrates as biomass starting materials: an efficient catalyst for regiospecific epoxidation of β-ionone with ultrahigh turnover numbers. Catal Sci Technol 2018. [DOI: 10.1039/c8cy01413b] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Fabrication of Se/C catalyst from glucose as the biomass starting materials was reported for the first time, affording an efficient and regiospecific epoxidation of β-ionone.
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Affiliation(s)
- Yufan Yang
- Guangling College and Institute of Pesticide of School of Chemistry and Chemical Engineering and School of Horticulture and Plant Protection
- Yangzhou University
- Yangzhou
- China
| | - Xin Fan
- Guangling College and Institute of Pesticide of School of Chemistry and Chemical Engineering and School of Horticulture and Plant Protection
- Yangzhou University
- Yangzhou
- China
| | - Hongen Cao
- Guangling College and Institute of Pesticide of School of Chemistry and Chemical Engineering and School of Horticulture and Plant Protection
- Yangzhou University
- Yangzhou
- China
- Jiangsu Key Laboratory of Zoonosis
| | - Sainan Chu
- Guangling College and Institute of Pesticide of School of Chemistry and Chemical Engineering and School of Horticulture and Plant Protection
- Yangzhou University
- Yangzhou
- China
| | - Xu Zhang
- Guangling College and Institute of Pesticide of School of Chemistry and Chemical Engineering and School of Horticulture and Plant Protection
- Yangzhou University
- Yangzhou
- China
| | - Qing Xu
- Guangling College and Institute of Pesticide of School of Chemistry and Chemical Engineering and School of Horticulture and Plant Protection
- Yangzhou University
- Yangzhou
- China
| | - Lei Yu
- Guangling College and Institute of Pesticide of School of Chemistry and Chemical Engineering and School of Horticulture and Plant Protection
- Yangzhou University
- Yangzhou
- China
- Jiangsu Key Laboratory of Zoonosis
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28
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Affiliation(s)
- Leonardo J. Nannini
- Laboratorium für Organische ChemieETH Zurich, HCl H335 Vladimir-Prelog-Weg 3 8093 Zürich Switzerland
| | - Suren J. Nemat
- Laboratorium für Organische ChemieETH Zurich, HCl H335 Vladimir-Prelog-Weg 3 8093 Zürich Switzerland
| | - Erick M. Carreira
- Laboratorium für Organische ChemieETH Zurich, HCl H335 Vladimir-Prelog-Weg 3 8093 Zürich Switzerland
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29
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Zhang PP, Yan ZM, Li YH, Gong JX, Yang Z. Enantioselective Total Synthesis of (-)-Pavidolide B. J Am Chem Soc 2017; 139:13989-13992. [PMID: 28870073 DOI: 10.1021/jacs.7b07388] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The enantioselective synthesis of (-)-pavidolide B (1) was achieved in a linear sequence of 10 steps. The key steps are (a) an enantioselective organocatalytic cyclopropanation; (b) a radical-based cascade annulation for the regio- and diastereo-selective synthesis of the highly functionalized lactone 3 bearing the characteristic tricyclic core and seven contiguous stereocenters;
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Affiliation(s)
- Peng-Peng Zhang
- Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School , Shenzhen 518055, China
| | - Zhi-Ming Yan
- Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School , Shenzhen 518055, China
| | - Yuan-He Li
- Key Laboratory of Bioorganic Chemistry and Molecular Engineering, Ministry of Education, Beijing National Laboratory for Molecular Science, College of Chemistry and Molecular Engineering, and Peking-Tsinghua Center for Life Sciences, Peking University , Beijing 100871, China
| | - Jian-Xian Gong
- Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School , Shenzhen 518055, China
| | - Zhen Yang
- Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School , Shenzhen 518055, China.,Key Laboratory of Bioorganic Chemistry and Molecular Engineering, Ministry of Education, Beijing National Laboratory for Molecular Science, College of Chemistry and Molecular Engineering, and Peking-Tsinghua Center for Life Sciences, Peking University , Beijing 100871, China.,Laboratory for Marine Drugs and Bioproducts of Qingdao National Laboratory for Marine Science and Technology , Qingdao, Shandong 266237, China
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30
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Lal RA, Kumar A, Syiemlieh I, Kurbah SD. Synthesis, characterization, and catalytic activity of a water soluble copper(II) and nickel(II) heterobimetallic complex [CuNi(μ-OH)(μ-OH2)(μ-OAc)(bpy)2](ClO4)2 in aqueous medium in the absence of a base and co-catalyst. J COORD CHEM 2017. [DOI: 10.1080/00958972.2017.1358812] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Ram A. Lal
- Centre for Advanced Studies, Department of Chemistry, North-Eastern Hill University, Shillong, India
| | - Arvind Kumar
- Department of Chemistry, Faculty of Science and Technology, The University of West-Indies, St. Augustine, Trinidad and Tobago
| | - Ibanphylla Syiemlieh
- Centre for Advanced Studies, Department of Chemistry, North-Eastern Hill University, Shillong, India
| | - Sunshine D. Kurbah
- Centre for Advanced Studies, Department of Chemistry, North-Eastern Hill University, Shillong, India
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31
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Zhang W, Wei Q, Lan L, Wu A, Yin X, Shen L. Allylic oxidation of cyclic alkenes with molecular oxygen and tert-butyl hydroperoxide over copper-manganese oxides. MONATSHEFTE FUR CHEMIE 2017. [DOI: 10.1007/s00706-016-1742-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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32
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Murray PM, Bellany F, Benhamou L, Bučar DK, Tabor AB, Sheppard TD. The application of design of experiments (DoE) reaction optimisation and solvent selection in the development of new synthetic chemistry. Org Biomol Chem 2015; 14:2373-84. [PMID: 26699438 DOI: 10.1039/c5ob01892g] [Citation(s) in RCA: 87] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
This article outlines the benefits of using 'Design of Experiments' (DoE) optimisation during the development of new synthetic methodology. A particularly important factor in the development of new chemical reactions is the choice of solvent which can often drastically alter the efficiency and selectivity of a process. Whilst solvent optimisation is usually done in a non-systematic way based upon a chemist's intuition and previous laboratory experience, we illustrate how optimisation of the solvent for a reaction can be carried out by using a 'map of solvent space' in a DoE optimisation. A new solvent map has been developed specifically for optimisation of new chemical reactions using principle component analysis (PCA) incorporating 136 solvents with a wide range of properties. The new solvent map has been used to identify safer alternatives to toxic/hazardous solvents, and also in the optimisation of an S(N)Ar reaction.
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Affiliation(s)
- Paul M Murray
- Paul Murray Catalysis Consulting Ltd, 67 Hudson Close, Yate, BS37 4NP, UK.
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33
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García-Cabeza AL, Marín-Barrios R, Moreno-Dorado FJ, Ortega MJ, Vidal H, Gatica JM, Massanet GM, Guerra FM. Acyloxylation of 1,4-Dioxanes and 1,4-Dithianes Catalyzed by a Copper–Iron Mixed Oxide. J Org Chem 2015; 80:6814-21. [DOI: 10.1021/acs.joc.5b01043] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ana Leticia García-Cabeza
- Departamento
de Química Orgánica and ‡Departamento de Ciencia de los Materiales
e Ingeniería Metalúrgica y Química Inorgánica, Facultad de Ciencias, Universidad de Cádiz, 11510 Puerto Real, Cádiz, Spain
| | - Rubén Marín-Barrios
- Departamento
de Química Orgánica and ‡Departamento de Ciencia de los Materiales
e Ingeniería Metalúrgica y Química Inorgánica, Facultad de Ciencias, Universidad de Cádiz, 11510 Puerto Real, Cádiz, Spain
| | - F. Javier Moreno-Dorado
- Departamento
de Química Orgánica and ‡Departamento de Ciencia de los Materiales
e Ingeniería Metalúrgica y Química Inorgánica, Facultad de Ciencias, Universidad de Cádiz, 11510 Puerto Real, Cádiz, Spain
| | - María J. Ortega
- Departamento
de Química Orgánica and ‡Departamento de Ciencia de los Materiales
e Ingeniería Metalúrgica y Química Inorgánica, Facultad de Ciencias, Universidad de Cádiz, 11510 Puerto Real, Cádiz, Spain
| | - Hilario Vidal
- Departamento
de Química Orgánica and ‡Departamento de Ciencia de los Materiales
e Ingeniería Metalúrgica y Química Inorgánica, Facultad de Ciencias, Universidad de Cádiz, 11510 Puerto Real, Cádiz, Spain
| | - José M. Gatica
- Departamento
de Química Orgánica and ‡Departamento de Ciencia de los Materiales
e Ingeniería Metalúrgica y Química Inorgánica, Facultad de Ciencias, Universidad de Cádiz, 11510 Puerto Real, Cádiz, Spain
| | - Guillermo M. Massanet
- Departamento
de Química Orgánica and ‡Departamento de Ciencia de los Materiales
e Ingeniería Metalúrgica y Química Inorgánica, Facultad de Ciencias, Universidad de Cádiz, 11510 Puerto Real, Cádiz, Spain
| | - Francisco M. Guerra
- Departamento
de Química Orgánica and ‡Departamento de Ciencia de los Materiales
e Ingeniería Metalúrgica y Química Inorgánica, Facultad de Ciencias, Universidad de Cádiz, 11510 Puerto Real, Cádiz, Spain
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34
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Hubert JG, Furkert DP, Brimble MA. Preparation of cis-γ-Hydroxycarvone Derivatives for Synthesis of Sesterterpenoid Natural Products: Total Synthesis of Phorbin A. J Org Chem 2015; 80:2231-9. [DOI: 10.1021/jo502748s] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Jonathan G. Hubert
- School of Chemical Sciences and Maurice Wilkins Centre for Molecular
Biodiscovery, University of Auckland, 23 Symonds Street, Auckland 1142, New Zealand
| | - Daniel. P. Furkert
- School of Chemical Sciences and Maurice Wilkins Centre for Molecular
Biodiscovery, University of Auckland, 23 Symonds Street, Auckland 1142, New Zealand
| | - Margaret A. Brimble
- School of Chemical Sciences and Maurice Wilkins Centre for Molecular
Biodiscovery, University of Auckland, 23 Symonds Street, Auckland 1142, New Zealand
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35
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García-Cabeza AL, Ray LP, Marín-Barrios R, Ortega MJ, Moreno-Dorado FJ, Guerra FM, Massanet GM. Optimization by Response Surface Methodology (RSM) of the Kharasch–Sosnovsky Oxidation of Valencene. Org Process Res Dev 2014. [DOI: 10.1021/op5002462] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ana Leticia García-Cabeza
- Departamento
de Química
Orgánica, Facultad de Ciencias, Universidad de Cádiz, 11510 Puerto Real, Cádiz, Spain
| | - Lindsey P. Ray
- Departamento
de Química
Orgánica, Facultad de Ciencias, Universidad de Cádiz, 11510 Puerto Real, Cádiz, Spain
| | - Rubén Marín-Barrios
- Departamento
de Química
Orgánica, Facultad de Ciencias, Universidad de Cádiz, 11510 Puerto Real, Cádiz, Spain
| | - María J. Ortega
- Departamento
de Química
Orgánica, Facultad de Ciencias, Universidad de Cádiz, 11510 Puerto Real, Cádiz, Spain
| | - F. Javier Moreno-Dorado
- Departamento
de Química
Orgánica, Facultad de Ciencias, Universidad de Cádiz, 11510 Puerto Real, Cádiz, Spain
| | - Francisco M. Guerra
- Departamento
de Química
Orgánica, Facultad de Ciencias, Universidad de Cádiz, 11510 Puerto Real, Cádiz, Spain
| | - Guillermo M. Massanet
- Departamento
de Química
Orgánica, Facultad de Ciencias, Universidad de Cádiz, 11510 Puerto Real, Cádiz, Spain
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36
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Renzi P, Kronig C, Carlone A, Eröksüz S, Berkessel A, Bella M. Kinetic Resolution of Oxazinones: Rational Exploration of Chemical Space through the Design of Experiments. Chemistry 2014; 20:11768-75. [DOI: 10.1002/chem.201402380] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2014] [Indexed: 11/07/2022]
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37
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Marín-Barrios R, García-Cabeza AL, Moreno-Dorado FJ, Guerra FM, Massanet GM. Acyloxylation of Cyclic Enones: Synthesis of Densely Oxygenated Guaianolides. J Org Chem 2014; 79:6501-9. [DOI: 10.1021/jo500915r] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Rubén Marín-Barrios
- Departamento de Química
Orgánica, Facultad de Ciencias, Universidad de Cádiz, 11510 Puerto Real, Cádiz, Spain
| | - Ana Leticia García-Cabeza
- Departamento de Química
Orgánica, Facultad de Ciencias, Universidad de Cádiz, 11510 Puerto Real, Cádiz, Spain
| | - F. Javier Moreno-Dorado
- Departamento de Química
Orgánica, Facultad de Ciencias, Universidad de Cádiz, 11510 Puerto Real, Cádiz, Spain
| | - Francisco M. Guerra
- Departamento de Química
Orgánica, Facultad de Ciencias, Universidad de Cádiz, 11510 Puerto Real, Cádiz, Spain
| | - Guillermo M. Massanet
- Departamento de Química
Orgánica, Facultad de Ciencias, Universidad de Cádiz, 11510 Puerto Real, Cádiz, Spain
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38
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García-Cabeza AL, Marín-Barrios R, Moreno-Dorado FJ, Ortega MJ, Massanet GM, Guerra FM. Allylic oxidation of alkenes catalyzed by a copper-aluminum mixed oxide. Org Lett 2014; 16:1598-601. [PMID: 24597600 DOI: 10.1021/ol500198c] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
A strategy for the allylic oxidation of cyclic alkenes with a copper-aluminum mixed oxide as catalyst is presented. The reaction involves the treatment of an alkene with a carboxylic acid employing tert-butyl hydroperoxide as the oxidant. In all cases, the corresponding allylic esters are obtained. When L-proline is employed, the allylic alcohol or ketone is obtained. The oxidation of cyclohexene and valencene has been optimized by design of experiments (DoE) statistical methodology.
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Affiliation(s)
- Ana Leticia García-Cabeza
- Departamento de Química Orgánica, Facultad de Ciencias, Universidad de Cádiz , 11510 Puerto Real, Cádiz, Spain
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Peixoto PA, Cormier M, Ekosso Epane J, Jean A, Maddaluno J, De Paolis M. Metal-free aerobic C–H oxidation of cyclic enones. Org Chem Front 2014. [DOI: 10.1039/c4qo00125g] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A metal-free procedure is described for the aerobic and complete C–H methylene oxidation of Hajos–Parrish enones to versatile dihydroindenediones.
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Affiliation(s)
- P. A. Peixoto
- Laboratoire COBRA
- CNRS UMR 6014 & FR 3038
- Université et INSA de Rouen
- 76821-Mont Saint-Aignan, France
| | - M. Cormier
- Laboratoire COBRA
- CNRS UMR 6014 & FR 3038
- Université et INSA de Rouen
- 76821-Mont Saint-Aignan, France
| | - J. Ekosso Epane
- Laboratoire COBRA
- CNRS UMR 6014 & FR 3038
- Université et INSA de Rouen
- 76821-Mont Saint-Aignan, France
| | - A. Jean
- Laboratoire COBRA
- CNRS UMR 6014 & FR 3038
- Université et INSA de Rouen
- 76821-Mont Saint-Aignan, France
| | - J. Maddaluno
- Laboratoire COBRA
- CNRS UMR 6014 & FR 3038
- Université et INSA de Rouen
- 76821-Mont Saint-Aignan, France
| | - M. De Paolis
- Laboratoire COBRA
- CNRS UMR 6014 & FR 3038
- Université et INSA de Rouen
- 76821-Mont Saint-Aignan, France
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