1
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Kuroiwa H, Suzuki S, Irie K, Tsukano C. Total Synthesis and Structure Revision of (+)-Lancilactone C. J Am Chem Soc 2023. [PMID: 37326375 DOI: 10.1021/jacs.3c04124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Lancilactone C is a tricyclic triterpenoid that inhibits human immunodeficiency virus (HIV) replication in H9 lymphocytes with no cytotoxicity. Its tricyclic skeleton comprises trans-dimethylbicyclo[4.3.0]nonane and 7-isopropylenecyclohepta-1,3,5-triene. The latter unique structure, in which all carbon atoms are sp2 hybridized, is not found in other triterpenoids and needs to be verified synthetically. Herein, we have accomplished the first total synthesis of lancilactone C (proposed structure) by developing a new domino [4 + 3] cycloaddition reaction involving oxidation, Diels-Alder reaction, elimination, and electrocyclization. We have also revised the structure based on the total synthesis of lancilactone C according to its plausible biosynthetic pathway.
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Affiliation(s)
- Hidetaka Kuroiwa
- Graduate School of Agriculture, Kyoto University, Kitashirakawa-Oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Soichiro Suzuki
- Graduate School of Agriculture, Kyoto University, Kitashirakawa-Oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Kazuhiro Irie
- Graduate School of Agriculture, Kyoto University, Kitashirakawa-Oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Chihiro Tsukano
- Graduate School of Agriculture, Kyoto University, Kitashirakawa-Oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan
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2
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Peedika Paramban R, Guo Z, Deacon GB, Junk PC. Formation of a cyclooctatetraenylsamarium(III) inverse sandwich that ring-opens tetrahydrofuran. Dalton Trans 2023; 52:3563-3566. [PMID: 36637021 DOI: 10.1039/d2dt04164b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Reductive trapping of the cyclooctatetraenyl dianion (COT2-) by treatment of [Sm(DippForm)2(thf)2] (DippFormH = N,N'-bis(2,6-diisopropylphenyl)formamidine; thf = tetrahydrofuran) with 1,3,5,7-cyclooctatetraene (C8H8) in toluene yields an inverse sandwich dinuclear complex [Sm2(DippForm)4(COT)] (1), but [Sm(DippForm)(COT)(thf)2] (2) and [Sm(DippForm)2(O-C4H8-DippForm)(thf)] (3) in thf, and 1 yields 2 and 3 on treatment with thf.
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Affiliation(s)
| | - Zhifang Guo
- College of Science & Engineering, James Cook University, Townsville, QLD, 4811, Australia.
| | - Glen B Deacon
- School of Chemistry, Monash University, Clayton, VIC, 3800, Australia
| | - Peter C Junk
- College of Science & Engineering, James Cook University, Townsville, QLD, 4811, Australia.
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3
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Dodonov VA, Makarov VM, Zemnyukova MN, Razborov DA, Baranov EV, Bogomyakov AS, Ovcharenko VI, Fedushkin IL. Stability and Solution Behavior of [(dpp-Bian)Ln] and [(dpp-Bian)LnX] (Ln = Yb, Tm, or Dy; X = I, F, or N 3). Organometallics 2023. [DOI: 10.1021/acs.organomet.2c00640] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/19/2023]
Affiliation(s)
- Vladimir A. Dodonov
- G. A. Razuvaev Institute of Organometallic Chemistry of Russian Academy of Sciences (IOMC RAS), Tropinina 49, Nizhny Novgorod 603950, Russian Federation
| | - Valentin M. Makarov
- G. A. Razuvaev Institute of Organometallic Chemistry of Russian Academy of Sciences (IOMC RAS), Tropinina 49, Nizhny Novgorod 603950, Russian Federation
| | - Marina N. Zemnyukova
- G. A. Razuvaev Institute of Organometallic Chemistry of Russian Academy of Sciences (IOMC RAS), Tropinina 49, Nizhny Novgorod 603950, Russian Federation
| | - Danila A. Razborov
- G. A. Razuvaev Institute of Organometallic Chemistry of Russian Academy of Sciences (IOMC RAS), Tropinina 49, Nizhny Novgorod 603950, Russian Federation
| | - Evgeny V. Baranov
- G. A. Razuvaev Institute of Organometallic Chemistry of Russian Academy of Sciences (IOMC RAS), Tropinina 49, Nizhny Novgorod 603950, Russian Federation
| | - Artem S. Bogomyakov
- International Tomography Center, Siberian Branch of the Russian Academy of Sciences, Institutskaya Street 3a, Novosibirsk 630090, Russian Federation
| | - Victor I. Ovcharenko
- International Tomography Center, Siberian Branch of the Russian Academy of Sciences, Institutskaya Street 3a, Novosibirsk 630090, Russian Federation
| | - Igor L. Fedushkin
- G. A. Razuvaev Institute of Organometallic Chemistry of Russian Academy of Sciences (IOMC RAS), Tropinina 49, Nizhny Novgorod 603950, Russian Federation
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4
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Heravi MM, Nazari A. Samarium(ii) iodide-mediated reactions applied to natural product total synthesis. RSC Adv 2022; 12:9944-9994. [PMID: 35424959 PMCID: PMC8965710 DOI: 10.1039/d1ra08163b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2021] [Accepted: 03/12/2022] [Indexed: 12/22/2022] Open
Abstract
Natural product synthesis remains a field in which new synthetic methods and reagents are continually being evaluated. Due to the demanding structures and complex functionality of many natural products, only powerful and selective methods and reagents will be highlighted in this proceeding. Since its introduction by Henri Kagan, samarium(ii) iodide (SmI2, Kagan's reagent) has found increasing use in chemical synthesis. Over the years, many reviews have been published on the application of SmI2 in numerous reductive coupling procedures as well as in natural product total synthesis. This review highlights recent advances in SmI2-mediated synthetic strategies, as applied in the total synthesis of natural products since 2004. Natural product synthesis remains a field in which new synthetic methods and reagents are continually being evaluated.![]()
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Affiliation(s)
- Majid M Heravi
- Department of Chemistry, School of Science, Alzahra University PO Box 1993891176 Vanak Tehran Iran +98 21 88041344 +98 21 88044051
| | - Azadeh Nazari
- Department of Chemistry, School of Science, Alzahra University PO Box 1993891176 Vanak Tehran Iran +98 21 88041344 +98 21 88044051
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5
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Rao CN, Reissig HU. Samarium(II)‐Promoted Cyclizations of Non‐activated Indolyl Sulfinyl Imines to Polycyclic Tertiary Carbinamines. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200264] [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)
- Chintada Nageswara Rao
- Freie Universität Berlin: Freie Universitat Berlin Institut für Chemie und Biochemie 14195 Berlin GERMANY
| | - Hans-Ulrich Reissig
- Freie Universität Berlin Institut für Chemie und Biochemie Takustr. 3 14195 Berlin GERMANY
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6
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Galimov DI, Yakupova SM, Bulgakov RG. Acceleration of Sm(III) → Sm(II) reduction under the combined action of the chemical reductant diisobutylaluminum hydride and UV irradiation. J Photochem Photobiol A Chem 2022. [DOI: 10.1016/j.jphotochem.2021.113711] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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7
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Zheng Y, Cao CS, Ma W, Chen T, Wu B, Yu C, Huang Z, Yin J, Hu HS, Li J, Zhang WX, Xi Z. 2-Butene Tetraanion Bridged Dinuclear Samarium(III) Complexes via Sm(II)-Mediated Reduction of Electron-Rich Olefins. J Am Chem Soc 2020; 142:10705-10714. [PMID: 32408744 DOI: 10.1021/jacs.0c01690] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
While reduction reactions are ubiquitous in chemistry, it is very challenging to further reduce electron-rich compounds, especially the anionic ones. In this work, the reduction of 1,3-butadienyl dianion, the anionic conjugated olefin, has been realized by divalent rare-earth metal compounds (SmI2), resulting in the formation of novel 2-butene tetraanion bridged disamarium(III) complexes. Density functional theory (DFT) analyses reveal two features: (i) the single electron transfer (SET) from 4f atomic orbitals (AOs) of each Sm center to the antibonding π*-orbitals of 1,3-butadienyl dianion is feasible and the new HOMO formed by the bonding interaction between Sm 5d orbitals (AOs) and the π*-orbitals of 1,3-butadienyl dianion can accept favorably 2e- from 4f AOs of Sm(II); (ii) the 2-butene tetraanionic ligand serves as a unique 10e- donating system, in which 4e- act as two σ-donation bonding interactions while the rest 6e- as three π-donation bonding interactions. The disamarium(III) complexes represent a unique class of the bridged bis-alkylidene rare-earth organometallic complexes. The ligand-based reductive reactivity of 2-butene tetraanion bridged disamarium(III) complexes demonstrates that 2-butene tetraanionic ligand serves as a 3e- reductant toward cyclooctatetraene (COT) to provide doubly COT-supported disamarabutadiene complexes. The reaction of the disamarium(III) complexes with Cp*Li produces the doubly Cp*-coordinated Sm(III) complexes via salt metathesis. In addition, the reaction with Mo(CO)6 affords the oxycyclopentadienyl dinuclear complex via CO insertion.
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Affiliation(s)
- Yu Zheng
- Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry, Peking University, Beijing 100871, China
| | - Chang-Su Cao
- Department of Chemistry and Key Laboratory of Organic Optoelectronics & Molecular Engineering of Ministry of Education, Tsinghua University, Beijing 100084, China
| | - Wangyang Ma
- Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry, Peking University, Beijing 100871, China
| | - Tianyang Chen
- Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry, Peking University, Beijing 100871, China
| | - Botao Wu
- Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry, Peking University, Beijing 100871, China
| | - Chao Yu
- Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry, Peking University, Beijing 100871, China
| | - Zhe Huang
- Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry, Peking University, Beijing 100871, China
| | - Jianhao Yin
- Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry, Peking University, Beijing 100871, China
| | - Han-Shi Hu
- Department of Chemistry and Key Laboratory of Organic Optoelectronics & Molecular Engineering of Ministry of Education, Tsinghua University, Beijing 100084, China
| | - Jun Li
- Department of Chemistry and Key Laboratory of Organic Optoelectronics & Molecular Engineering of Ministry of Education, Tsinghua University, Beijing 100084, China.,Department of Chemistry, Southern University of Science and Technology, Shenzhen 518055, China
| | - Wen-Xiong Zhang
- Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry, Peking University, Beijing 100871, China
| | - Zhenfeng Xi
- Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry, Peking University, Beijing 100871, China
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8
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Sinast M, Zuccolo M, Wischnat J, Sube T, Hasnik F, Baro A, Dallavalle S, Laschat S. Samarium Iodide-Promoted Asymmetric Reformatsky Reaction of 3-(2-Haloacyl)-2-oxazolidinones with Enals. J Org Chem 2019; 84:10050-10064. [PMID: 31343175 DOI: 10.1021/acs.joc.9b01219] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
3-(2-Haloacyl)-2-oxazolidinones were shown to react with enals in an asymmetric SmI2-promoted Reformatsky reaction to give stereochemically well-defined 3-hydroxy-4-alkenyl- and 3-hydroxy-2-methyl-4-alkenyl imides. Chirality transfer of the Evans (S)-oxazolidinone unit via a Zimmerman-Traxler-like transition state resulted in Reformatsky products with a relative syn-configuration. The absolute configuration of compounds obtained is opposite to the corresponding products obtained via aldol addition of boron enolates to enals using the same Evans oxazolidinones.
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Affiliation(s)
- Moritz Sinast
- Institut für Organische Chemie , Universität Stuttgart , Pfaffenwaldring 55 , 70569 Stuttgart , Germany
| | - Marco Zuccolo
- Institut für Organische Chemie , Universität Stuttgart , Pfaffenwaldring 55 , 70569 Stuttgart , Germany.,Department of Food, Environmental and Nutritional Sciences , Università degli Studi di Milano , Via Celoria 2 , 20133 Milano , Italy
| | - Jonathan Wischnat
- Institut für Organische Chemie , Universität Stuttgart , Pfaffenwaldring 55 , 70569 Stuttgart , Germany
| | - Tobias Sube
- Institut für Organische Chemie , Universität Stuttgart , Pfaffenwaldring 55 , 70569 Stuttgart , Germany
| | - Fabian Hasnik
- Institut für Organische Chemie , Universität Stuttgart , Pfaffenwaldring 55 , 70569 Stuttgart , Germany
| | - Angelika Baro
- Institut für Organische Chemie , Universität Stuttgart , Pfaffenwaldring 55 , 70569 Stuttgart , Germany
| | - Sabrina Dallavalle
- Department of Food, Environmental and Nutritional Sciences , Università degli Studi di Milano , Via Celoria 2 , 20133 Milano , Italy
| | - Sabine Laschat
- Institut für Organische Chemie , Universität Stuttgart , Pfaffenwaldring 55 , 70569 Stuttgart , Germany
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9
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Beemelmanns C, Nitsch D, Bentz C, Reissig HU. Stereoselective Cascade Cyclizations with Samarium Diiodide to Tetracyclic Indolines: Precursors of Fluorostrychnines and Brucine. Chemistry 2019; 25:8780-8789. [PMID: 31033048 DOI: 10.1002/chem.201900087] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2019] [Revised: 04/25/2019] [Indexed: 12/16/2022]
Abstract
A series of γ-indolylketones with fluorine, cyano or alkoxy substituents at the benzene moiety was prepared and subjected to samarium diiodide-promoted cyclization reactions. The desired dearomatizing ketyl cascade reaction forming two new rings proceeded in all cases with high diastereoselectivity, but with differing product distribution. In most cases, the desired annulated tetracyclic compounds were obtained in moderate to good yields, but as second product tetracyclic spirolactones were isolated in up to 29 % yield. The reaction rate was influenced by the substituents at the benzene moiety of the substrate as expected, with electron-accepting groups accelerating and electron-donating groups decelerating the cyclization process. In case of a difluoro-substituted γ-indolylketone a partial defluorination was observed. The intermediate samarium enolate of the tetracyclic products could be trapped by adding reactive alkylating agents as electrophiles delivering products with quarternary carbons. In the case of a dimethoxy-substituted tetracyclic cyclization product a subsequent reductive amination stereoselectively provided a pentacyclic compound that was subsequently N-protected and subjected to a regioselective elimination. The obtained functionalized pentacyclic product should be convertible into the alkaloid brucine by four well-established steps. Overall, the presented report shows that functionalized tetracyclic compounds with different substituents are rapidly available with the samarium diiodide cascade cyclization as crucial step. Hence, analogues of the landmark alkaloid strychnine, for example, with specific fluorine substitutions, should be easily accessible.
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Affiliation(s)
- Christine Beemelmanns
- Institut für Chemie und Biochemie, Freie Universität Berlin, Takustraße 3, 14195, Berlin, Germany.,Leibniz-Institut für Naturstoff-Forschung und Infektionsbiologie, Beutenbergstraße 11a, 07745, Jena, Germany
| | - Dominik Nitsch
- Institut für Chemie und Biochemie, Freie Universität Berlin, Takustraße 3, 14195, Berlin, Germany
| | - Christoph Bentz
- Institut für Chemie und Biochemie, Freie Universität Berlin, Takustraße 3, 14195, Berlin, Germany
| | - Hans-Ulrich Reissig
- Institut für Chemie und Biochemie, Freie Universität Berlin, Takustraße 3, 14195, Berlin, Germany
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10
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Meyer G. Small cause – Great effect: What the 4fn+15d0 → 4fn5d1 configuration crossover does to the chemistry of divalent rare-earth halides and coordination compounds. J SOLID STATE CHEM 2019. [DOI: 10.1016/j.jssc.2018.10.050] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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11
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Wang X, Li J, Yuan T, You B, Xie G, Lv X. Additive Tuned Selective Synthesis of Bicyclo[3.3.0]octan-1-ols and Bicyclo[3.1.0]hexan-1-ols Mediated by AllylSmBr. J Org Chem 2018; 83:8984-8994. [PMID: 29944369 DOI: 10.1021/acs.joc.8b01170] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The selective construction of bicyclo[3.3.0]octan-1-ols and bicyclo[3.1.0]hexan-1-ols was achieved by using an allylSmBr/additive(s) system. By employing HMPA as the only additive, the momoallylation/ketone-alkene coupling occurred preferably and afforded bicyclo[3.3.0]octan-1-ols in good yields with high diastereoselectivities. While the ester-alkene coupling predominated to generate bicyclo[3.1.0]hexan-1-ols in moderate yields with excellent diastereoselectivities in the presence of a proton source, such as pyrrole as the coadditive with HMPA. The tunable reactivity of allylSmBr by additive(s) would make it a versatile reagent in organic synthesis.
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Affiliation(s)
- Xiaoxia Wang
- School of Environment and Civil Engineering , Dongguan University of Technology , Dongguan , 523808 , People's Republic of China.,College of Chemistry and Life Sciences , Zhejiang Normal University , Jinhua 321004 , People's Republic of China
| | - Jianyong Li
- College of Chemistry and Life Sciences , Zhejiang Normal University , Jinhua 321004 , People's Republic of China
| | - Ting Yuan
- College of Chemistry and Life Sciences , Zhejiang Normal University , Jinhua 321004 , People's Republic of China
| | - Bingxin You
- College of Chemistry and Life Sciences , Zhejiang Normal University , Jinhua 321004 , People's Republic of China
| | - Guanqun Xie
- School of Environment and Civil Engineering , Dongguan University of Technology , Dongguan , 523808 , People's Republic of China.,College of Chemistry and Life Sciences , Zhejiang Normal University , Jinhua 321004 , People's Republic of China
| | - Xin Lv
- College of Chemistry and Life Sciences , Zhejiang Normal University , Jinhua 321004 , People's Republic of China
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12
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Takahashi K, Fukushima K, Tsubuki M, Honda T. The formal synthesis of lucentamycin A: Construction of cis -2,3-disubstituted pyrrolidine core by application of SmI 2 -DMPU system. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2018.02.076] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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13
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Mojarrad AG, Zakavi S. Simple low cost porphyrinic photosensitizers for large scale chemoselective oxidation of sulfides to sulfoxides under green conditions: targeted protonation of porphyrins. Catal Sci Technol 2018. [DOI: 10.1039/c7cy02308a] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Large scale chemoselective photooxidation of sulfides to sulfoxides in the presence of the diacids ofmeso-tetra(phenyl)porphyrin with different acids is reported.
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Affiliation(s)
- Aida G. Mojarrad
- Department of Chemistry
- Institute for Advanced Studies in Basic Sciences (IASBS)
- Zanjan 45137-66731
- Iran
| | - Saeed Zakavi
- Department of Chemistry
- Institute for Advanced Studies in Basic Sciences (IASBS)
- Zanjan 45137-66731
- Iran
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14
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Takahashi K, Arai Y, Honda T. The formal synthesis of (+)-15-deoxy-Δ12,14-prostaglandin J2: Controlling exo-olefin geometry via SmI2-mediated cyclization. Tetrahedron Lett 2017. [DOI: 10.1016/j.tetlet.2017.09.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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15
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Goulioukina NS, Shergold IA, Rybakov VB, Beletskaya IP. One-Pot Two-Step Synthesis of Optically Activeα-Amino Phosphonates by Palladium-Catalyzed Hydrogenation/Hydrogenolysis ofα-Hydrazono Phosphonates. Adv Synth Catal 2016. [DOI: 10.1002/adsc.201600945] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Nataliya S. Goulioukina
- Department of Chemistry; Moscow State University; Leninskie Gory, GSP-1 Moscow 119991 Russia
- Frumkin Institute of Physical Chemistry and Electrochemistry; Russian Academy of Sciences; 31 Leninsky prosp. Moscow 119071 Russia
| | - Ilya A. Shergold
- Department of Chemistry; Moscow State University; Leninskie Gory, GSP-1 Moscow 119991 Russia
| | - Victor B. Rybakov
- Department of Chemistry; Moscow State University; Leninskie Gory, GSP-1 Moscow 119991 Russia
| | - Irina P. Beletskaya
- Department of Chemistry; Moscow State University; Leninskie Gory, GSP-1 Moscow 119991 Russia
- Frumkin Institute of Physical Chemistry and Electrochemistry; Russian Academy of Sciences; 31 Leninsky prosp. Moscow 119071 Russia
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16
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Racine E, Burchak ON, Py S. Synthesis of α-Acyloxynitrones and Reactivity towards Samarium Diiodide. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600478] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Emilie Racine
- Univ. Grenoble Alpes; DCM; CNRS; DCM; 38000 Grenoble France
| | | | - Sandrine Py
- Univ. Grenoble Alpes; DCM; CNRS; DCM; 38000 Grenoble France
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17
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Lai Y, Sun L, Sit MK, Wang Y, Dai WM. Diastereoselective synthesis of trans-3,5-disubstituted dihydrofuran-2(3H)-ones via SmI2-mediated reductive coupling of 2-alkylacrylates of N,N-diisopropyl-2-hydroxybenzamide with aldehydes. Tetrahedron 2016. [DOI: 10.1016/j.tet.2015.12.009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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18
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Zhang F, Wang R, Wu S, Wang P, Zhang S. Highly α-regioselective neodymium-mediated allylation of diaryl ketones. RSC Adv 2016. [DOI: 10.1039/c6ra18378f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
The first utility of neodymium as a mediating-metal in the Barbier reaction of diaryl ketones with allyl halides is reported in this paper. This one-pot reaction was highly α-regioselective and was carried out under mild conditions.
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Affiliation(s)
- Fang Zhang
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry, Chemical Engineering and Materials Science
- Soochow University
- Suzhou 215123
- China
| | - Ru Wang
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry, Chemical Engineering and Materials Science
- Soochow University
- Suzhou 215123
- China
| | - San Wu
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry, Chemical Engineering and Materials Science
- Soochow University
- Suzhou 215123
- China
| | - Peipei Wang
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry, Chemical Engineering and Materials Science
- Soochow University
- Suzhou 215123
- China
| | - Songlin Zhang
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry, Chemical Engineering and Materials Science
- Soochow University
- Suzhou 215123
- China
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19
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Yoshimura A, Saeki T, Nomoto A, Ogawa A. Pinacol couplings of a series of aldehydes and ketones with SmI2/Sm/Me3SiCl in DME. Tetrahedron 2015. [DOI: 10.1016/j.tet.2015.06.007] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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20
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Abstract
Strychnine stands out from the group of classical natural products as one of the first complex compounds to be isolated in pure form and an extreme challenge to be structurally characterized. It has played a central role in natural product total syntheses and the surge in the development of innovative synthetic methods for many decades. Recently, we have accomplished one of the shortest formal total syntheses of strychnine (in ten steps and 14% overall yield or even shorter in eight steps and 10% overall yield). The evolution of a productive synthetic strategy, as well as the synthetic challenges tackled, are described here in detail, including examples of related transformations. The successful synthetic strategy was inspired by the premise that the core structure could be derived from simple aromatic indole precursors by a reductive SmI2 -induced ketyl-aryl coupling. Other key reactions included a diastereoselective reduction and a regioselective elimination protocol. Altogether one of the shortest syntheses of iso-strychnine and hence of strychnine was established.
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Affiliation(s)
- Christine Beemelmanns
- Leibniz Institute for Natural Product Research and Infection Biology e.V., Hans-Knöll-Institute (HKI), Beutenbergstrasse 11a, 07745, Jena, Germany.
| | - Hans-Ulrich Reissig
- Institut für Chemie und Biochemie, Freie Universität Berlin, Takustrasse 3, 14195, Berlin, Germany.
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21
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Huang ZA, Liu H, Lu CD, Xu YJ. Stereoselective Synthesis of Enantioenriched 2-Chloro-2-aroylaziridines by Cascade Reaction between Aryl Nitriles, Silyldichloromethanes, and tert-Butanesulfinylimines. Org Lett 2015; 17:4042-5. [PMID: 26226516 DOI: 10.1021/acs.orglett.5b01954] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The cascade coupling of aryl nitriles, silyldichloromethanes, and tert-butanesulfinylimines is described, in which silyldichloromethyllithiums, generated from silyldichloromethanes in the presence of lithium diisopropylamide, undergo nucleophilic addition with aryl nitriles and subsequent [1,3]-aza-Brook rearrangement to give dichlorocarbanions bearing α-N-silyl imine (or their 1-azaenolate equivalents), which are then trapped by tert-butanesulfinylimines via an aza-Darzens-type transformation, affording enantioenriched 2-chloro-2-aroylaziridines after acidic hydrolysis of the N-silyl imine group. The stereochemistry of this cascade reaction can be tuned by selecting appropriate silyl groups on the silyldichloromethanes and altering the order of addition of the imines and the hexamethylphosphoramide additive.
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Affiliation(s)
| | | | - Chong-Dao Lu
- ‡Department of Chemistry and Applied Chemistry, Changji University, Changji 831100, China
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22
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Yitzhaki O, Hoz S. Reversed Electron Apportionment in Mesolytic Cleavage: The Reduction of Benzyl Halides by SmI2. Chemistry 2015; 21:9242-8. [PMID: 25965697 DOI: 10.1002/chem.201500519] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2015] [Indexed: 12/11/2022]
Affiliation(s)
- Offir Yitzhaki
- Department of Chemistry, Bar-Ilan University, Ramat-Gan, 52900 (Israel)
| | - Shmaryahu Hoz
- Department of Chemistry, Bar-Ilan University, Ramat-Gan, 52900 (Israel).
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23
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Beemelmanns C, Reissig HU. Evolution of a Short Route to Strychnine by Using the Samarium-Diiodide-Induced Cascade Cyclization as a Key Step. Chemistry 2015; 21:8416-25. [DOI: 10.1002/chem.201500094] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2015] [Indexed: 01/15/2023]
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24
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Rao CN, Lentz D, Reißig HU. Synthese polycyclischer tertiärer Carbinamine durch Samariumdiiodid-vermittelte Cyclisierungen von Indolylsulfinyliminen. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201408324] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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25
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Rao CN, Lentz D, Reissig HU. Synthesis of Polycyclic Tertiary Carbinamines by Samarium Diiodide Mediated Cyclizations of Indolyl Sulfinyl Imines. Angew Chem Int Ed Engl 2015; 54:2750-3. [DOI: 10.1002/anie.201408324] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2014] [Revised: 11/06/2014] [Indexed: 12/14/2022]
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26
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Shen M, Tu Y, Xie G, Niu Q, Mao H, Xie T, Flowers RA, Lv X, Wang X. Allylsamarium Bromide-Mediated Cascade Cyclization of Homoallylic Esters. Synthesis of 2-(2-Hydroxyalkyl)cyclopropanols and 2-(2-Hydroxyethyl)bicyclo[2.1.1]hexan-1-ols. J Org Chem 2015; 80:52-61. [PMID: 25427109 DOI: 10.1021/jo501797w] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
In continuation of our previous study on the intramolecular reductive coupling of simple homoallylic esters promoted by allylSmBr/HMPA/H2O, which afforded a facile synthesis of 2-(2-hydroxyalkyl)cyclopropanols, here we report the reductive cascade cyclization of but-3-enyl but-3-enoates mediated by allylSmBr/HMPA/CuCl2·2H2O, in which the two C═C bonds were successively coupled to allow the construction of the structurally interesting bridged bicyclic tertiary alcohols. Thus, the 2-(2-hydroxyethyl)bicyclo[2.1.1]hexan-1-ols were prepared in moderate to good yields with excellent diastereoselectivity.
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Affiliation(s)
- Mengmeng Shen
- †Department of Chemistry, College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua 321004, People's Republic of China
| | - Yawei Tu
- †Department of Chemistry, College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua 321004, People's Republic of China
| | - Guanqun Xie
- †Department of Chemistry, College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua 321004, People's Republic of China
| | - Qingsheng Niu
- †Department of Chemistry, College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua 321004, People's Republic of China
| | - Hui Mao
- †Department of Chemistry, College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua 321004, People's Republic of China
| | - Tingting Xie
- †Department of Chemistry, College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua 321004, People's Republic of China
| | - Robert A Flowers
- ‡Department of Chemistry, Lehigh University, Bethlehem, Pennsylvania 18015, United States
| | - Xin Lv
- †Department of Chemistry, College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua 321004, People's Republic of China
| | - Xiaoxia Wang
- †Department of Chemistry, College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua 321004, People's Republic of China
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27
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Zheng X, Liu J, Ye CX, Wang A, Wang AE, Huang PQ. SmI2-Mediated Radical Coupling Strategy to Securinega Alkaloids: Total Synthesis of (−)-14,15-Dihydrosecurinine and Formal Total Synthesis of (−)-Securinine. J Org Chem 2014; 80:1034-41. [DOI: 10.1021/jo502522x] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Xiao Zheng
- Department
of Chemistry and The Key Laboratory for Chemical Biology of Fujian
Province, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, China
- Key
Laboratory of Synthetic Chemistry of Natural Substances, Shanghai
Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China
| | - Juan Liu
- Department
of Chemistry and The Key Laboratory for Chemical Biology of Fujian
Province, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, China
| | - Chen-Xi Ye
- Department
of Chemistry and The Key Laboratory for Chemical Biology of Fujian
Province, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, China
| | - Ao Wang
- Department
of Chemistry and The Key Laboratory for Chemical Biology of Fujian
Province, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, China
| | - Ai-E Wang
- Department
of Chemistry and The Key Laboratory for Chemical Biology of Fujian
Province, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, China
| | - Pei-Qiang Huang
- Department
of Chemistry and The Key Laboratory for Chemical Biology of Fujian
Province, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, China
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28
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Segade Y, Montaos MA, Rodríguez J, Jiménez C. A Short Stereoselective Synthesis of Prepiscibactin Using a SmI2-Mediated Reformatsky Reaction and Zn2+-Induced Asymmetric Thiazolidine Formation. Org Lett 2014; 16:5820-3. [DOI: 10.1021/ol502958u] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Yuri Segade
- Departamento de
Química
Fundamental, Facultade de Ciencias e Centro de Investigacións
de Ciencias Avanzadas (CICA), Universidade da Coruña, A Coruña E-15071, Spain
| | - Marcos A. Montaos
- Departamento de
Química
Fundamental, Facultade de Ciencias e Centro de Investigacións
de Ciencias Avanzadas (CICA), Universidade da Coruña, A Coruña E-15071, Spain
| | - Jaime Rodríguez
- Departamento de
Química
Fundamental, Facultade de Ciencias e Centro de Investigacións
de Ciencias Avanzadas (CICA), Universidade da Coruña, A Coruña E-15071, Spain
| | - Carlos Jiménez
- Departamento de
Química
Fundamental, Facultade de Ciencias e Centro de Investigacións
de Ciencias Avanzadas (CICA), Universidade da Coruña, A Coruña E-15071, Spain
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29
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Yella R, Hoz S. Channeling the SmI2 Reactions to the Radical Path: Radicals Resisting Reduction by SmI2. Org Lett 2014; 16:3876-9. [PMID: 25030208 DOI: 10.1021/ol501490f] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ramesh Yella
- Department
of Chemistry, Bar-Illan University, Ramat-Gan 52900, Israel
| | - Shmaryahu Hoz
- Department
of Chemistry, Bar-Illan University, Ramat-Gan 52900, Israel
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30
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Yoshimura A, Tomisaka Y, Li Z, Nomoto A, Ogawa A. Photoinduced Reductive Coupling of Organochlorosilanes with SmI2/Sm. HETEROATOM CHEMISTRY 2014. [DOI: 10.1002/hc.21186] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Aya Yoshimura
- Department of Applied Chemistry; Graduate School of Engineering; Osaka Prefecture University; Sakai Osaka 599-8531 Japan
| | - Yuri Tomisaka
- Department of Applied Chemistry; Graduate School of Engineering; Osaka Prefecture University; Sakai Osaka 599-8531 Japan
| | - Zhifang Li
- Key Laboratory of Organosilicon Chemistry; Hangzhou Normal University; Hangzhou 310012 People's Republic of China
| | - Akihiro Nomoto
- Department of Applied Chemistry; Graduate School of Engineering; Osaka Prefecture University; Sakai Osaka 599-8531 Japan
| | - Akiya Ogawa
- Department of Applied Chemistry; Graduate School of Engineering; Osaka Prefecture University; Sakai Osaka 599-8531 Japan
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31
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Kise N, Hamada Y, Sakurai T. Electroreductive coupling of optically active α,β-unsaturated carbonyl compounds with diaryl ketones: asymmetric synthesis of 4,5,5-trisubstituted γ-butyrolactones. Org Lett 2014; 16:3348-51. [PMID: 24901637 DOI: 10.1021/ol5013789] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The electroreductive coupling of optically active N-E-crotonoyl- and N-cinnamoylimidazolidin-2-ones and oxazolidin-2-ones with diaryl ketones in the presence of chlorotrimethylsilane gave adducts with high diastereoselectivity. The adducts were readily transformed to optically active 4,5,5-trisubstituted γ-butyrolactones by treatment with TBAF.
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Affiliation(s)
- Naoki Kise
- Department of Chemistry and Biotechnology, Graduate School of Engineering, Tottori University , 4-101, Koyama-cho Minami, Tottori 680-8552, Japan
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32
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Szostak M, Fazakerley NJ, Parmar D, Procter DJ. Cross-Coupling Reactions Using Samarium(II) Iodide. Chem Rev 2014; 114:5959-6039. [DOI: 10.1021/cr400685r] [Citation(s) in RCA: 290] [Impact Index Per Article: 29.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Michal Szostak
- School
of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL, United Kingdom
| | - Neal J. Fazakerley
- School
of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL, United Kingdom
| | - Dixit Parmar
- School
of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL, United Kingdom
| | - David J. Procter
- School
of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL, United Kingdom
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33
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Szostak M, Spain M, Procter DJ. Determination of the Effective Redox Potentials of SmI2, SmBr2, SmCl2, and their Complexes with Water by Reduction of Aromatic Hydrocarbons. Reduction of Anthracene and Stilbene by Samarium(II) Iodide–Water Complex. J Org Chem 2014; 79:2522-37. [DOI: 10.1021/jo4028243] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Michal Szostak
- School of Chemistry, University of Manchester, Oxford
Road, Manchester M13 9PL, United Kingdom
| | - Malcolm Spain
- School of Chemistry, University of Manchester, Oxford
Road, Manchester M13 9PL, United Kingdom
| | - David J. Procter
- School of Chemistry, University of Manchester, Oxford
Road, Manchester M13 9PL, United Kingdom
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34
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Takemoto Y, Tsukano C. Synthetic Approaches to Spiro-oxindoles and Iminoindolines Based on Formation of C2–C3 Bond. HETEROCYCLES 2014. [DOI: 10.3987/rev-14-805] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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35
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Beemelmanns C, Gross S, Reissig HU. Towards the Core Structure ofStrychnosAlkaloids Using Samarium Diiodide-Induced Reactions of Indole Derivatives. Chemistry 2013; 19:17801-8. [DOI: 10.1002/chem.201302795] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2013] [Indexed: 01/03/2023]
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36
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Yella R, Hoz S. Reduction of 4-Styrylpyridine by SmI2: An Inner Sphere Electron Tranfer Case Where the Binding Site Differs from the Reaction Center. Org Lett 2013; 15:5262-5. [DOI: 10.1021/ol402484j] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Ramesh Yella
- Department of Chemistry, Bar-Illan University, Ramat-Gan 52900, Israel
| | - Shmaryahu Hoz
- Department of Chemistry, Bar-Illan University, Ramat-Gan 52900, Israel
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37
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Lu P, Gu Z, Zakarian A. Total synthesis of maoecrystal V: early-stage C-H functionalization and lactone assembly by radical cyclization. J Am Chem Soc 2013; 135:14552-5. [PMID: 24047444 DOI: 10.1021/ja408231t] [Citation(s) in RCA: 113] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
A total synthesis of the unusual ent-kaurane maoecrystal V is described. The synthesis strategy features a counterintuitive early disconnection of the lactone subunit to a polycyclic enol ether intermediate in order to preserve the central tetrahydrofuran ring until the beginning stages of the synthesis. This strategy enables an application of C-H functionalization at the early phase of the synthesis during the construction of a dihydrobenzofuran intermediate.
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Affiliation(s)
- Ping Lu
- Department of Chemistry and Biochemistry, University of California , Santa Barbara, California 93110-9510, United States
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38
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Kise N, Sueyoshi A, Takeuchi SI, Sakurai T. Electroreductive Intermolecular Coupling of 3-Methoxycarbonylindoles with Ketones. Org Lett 2013; 15:2746-9. [DOI: 10.1021/ol4010799] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Naoki Kise
- Department of Chemistry and Biotechnology, Graduate School of Engineering, Tottori University, 4-101, Koyama-cho Minami, Tottori 680-8552, Japan
| | - Akinori Sueyoshi
- Department of Chemistry and Biotechnology, Graduate School of Engineering, Tottori University, 4-101, Koyama-cho Minami, Tottori 680-8552, Japan
| | - Shin-ichirou Takeuchi
- Department of Chemistry and Biotechnology, Graduate School of Engineering, Tottori University, 4-101, Koyama-cho Minami, Tottori 680-8552, Japan
| | - Toshihiko Sakurai
- Department of Chemistry and Biotechnology, Graduate School of Engineering, Tottori University, 4-101, Koyama-cho Minami, Tottori 680-8552, Japan
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39
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Abstract
The first enantiospecific total synthesis of the antibacterial natural product (+)-pleuromutilin has been achieved. The approach includes the synthesis of a non-racemic cyclisation substrate from (+)-trans-dihydrocarvone, a highly selective SmI2-mediated cyclisation cascade, an electron transfer reduction of a hindered ester, and the first efficient conversion of (+)-mutilin to the target.
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Affiliation(s)
- Neal J Fazakerley
- School of Chemistry, The University of Manchester, Oxford Road, Manchester, M13 9PL, UK
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40
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Yeh CH, Korivi RP, Cheng CH. Ene-Carbonyl Reductive Coupling Mediated by Zinc and Ammonia for the Synthesis of γ-Hydroxybutyric Acid Derivatives. Adv Synth Catal 2013. [DOI: 10.1002/adsc.201300073] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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41
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Li J, Liu GL, Zhao XH, Du JY, Qu H, Chu WD, Ding M, Jin CY, Wei MX, Fan CA. Formal Synthesis of (±)-Morphine. Chem Asian J 2013; 8:1105-9. [DOI: 10.1002/asia.201300139] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2013] [Indexed: 11/11/2022]
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42
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Gopalaiah K, Kagan HB. Recent Developments in Samarium Diiodide Promoted Organic Reactions. CHEM REC 2013; 13:187-208. [DOI: 10.1002/tcr.201200028] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2012] [Indexed: 11/10/2022]
Affiliation(s)
- Kovuru Gopalaiah
- Department of Chemistry; University of Delhi; Delhi; 110007; India
| | - Henri B. Kagan
- ICMMO (UMR CNRS 8182); Laboratoire de Catalyse Moléculaire; Université Paris-Sud; 91405; Orsay; France
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43
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Li Y, Hu YY, Zhang SL. Dual role of allylsamarium bromide as a Grignard reagent and a single electron transfer reagent in the one-pot synthesis of terminal olefins. Chem Commun (Camb) 2013; 49:10635-7. [DOI: 10.1039/c3cc45611k] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- Ying Li
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China.
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44
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Huo HH, Xia XE, Zhang HK, Huang PQ. Enantioselective Total Syntheses of (−)-FR901483 and (+)-8-epi-FR901483. J Org Chem 2012; 78:455-65. [DOI: 10.1021/jo302362b] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Hao-Hua Huo
- Department of Chemistry, College
of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, P. R. China
| | - Xiao-Er Xia
- Department of Chemistry, College
of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, P. R. China
| | - Hong-Kui Zhang
- Department of Chemistry, College
of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, P. R. China
| | - Pei-Qiang Huang
- Department of Chemistry, College
of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, P. R. China
- The State Key Laboratory of
Elemento-Organic Chemistry, Nankai University, Tianjin 300071, P. R. China
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45
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Tuo S, Liu X, Huang P. Towards Stereochemical Control: Two Approaches for the Highlyanti-Diastereoselective Construction of the Spirolactone Moieties of SomeStemonaAlkaloids. CHINESE J CHEM 2012. [DOI: 10.1002/cjoc.201200904] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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46
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Jasiński M, Watanabe T, Reissig HU. Samarium Diiodide Promoted Reduction of 3,6-Dihydro-2H-1,2-oxazines: Competition of 1,4-Amino Alcohol Formation and Ring Contraction to Pyrrole Derivatives. European J Org Chem 2012. [DOI: 10.1002/ejoc.201201210] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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47
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Levick MT, Coote SC, Grace I, Lambert C, Turner ML, Procter DJ. Phase Tag-Assisted Synthesis of Benzo[b]carbazole End-Capped Oligothiophenes. Org Lett 2012; 14:5744-7. [DOI: 10.1021/ol302748h] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Matthew T. Levick
- School of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL, U.K., and Department of Physics, Lancaster University, Lancaster, LA1 4YB, U.K
| | - Susannah C. Coote
- School of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL, U.K., and Department of Physics, Lancaster University, Lancaster, LA1 4YB, U.K
| | - Iain Grace
- School of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL, U.K., and Department of Physics, Lancaster University, Lancaster, LA1 4YB, U.K
| | - Colin Lambert
- School of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL, U.K., and Department of Physics, Lancaster University, Lancaster, LA1 4YB, U.K
| | - Michael L. Turner
- School of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL, U.K., and Department of Physics, Lancaster University, Lancaster, LA1 4YB, U.K
| | - David J. Procter
- School of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL, U.K., and Department of Physics, Lancaster University, Lancaster, LA1 4YB, U.K
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48
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Liu XK, Ye JL, Ruan YP, Li YX, Huang PQ. Total Synthesis of (−)-Sessilifoliamide J. J Org Chem 2012; 78:35-41. [DOI: 10.1021/jo3014484] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Xue-Kui Liu
- Department of Chemistry, College
of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, P. R. China
| | - Jian-Liang Ye
- Department of Chemistry, College
of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, P. R. China
| | - Yuan-Ping Ruan
- Department of Chemistry, College
of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, P. R. China
| | - Yu-Xiu Li
- Department of Chemistry, College
of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, P. R. China
| | - Pei-Qiang Huang
- Department of Chemistry, College
of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, P. R. China
- State Key Laboratory of Bioorganic and Natural Products Chemistry, 354 Fenglin
Lu, Shanghai 200032, P. R. China
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49
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Huo HH, Zhang HK, Xia XE, Huang PQ. A Formal Enantioselective Total Synthesis of FR901483. Org Lett 2012; 14:4834-7. [DOI: 10.1021/ol302165d] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hao-Hua Huo
- Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, P. R. China, and State Key Laboratory of Bioorganic and Natural Products Chemistry, 354 Fenglin Lu, Shanghai 200032, P. R. China
| | - Hong-Kui Zhang
- Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, P. R. China, and State Key Laboratory of Bioorganic and Natural Products Chemistry, 354 Fenglin Lu, Shanghai 200032, P. R. China
| | - Xiao-Er Xia
- Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, P. R. China, and State Key Laboratory of Bioorganic and Natural Products Chemistry, 354 Fenglin Lu, Shanghai 200032, P. R. China
| | - Pei-Qiang Huang
- Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, P. R. China, and State Key Laboratory of Bioorganic and Natural Products Chemistry, 354 Fenglin Lu, Shanghai 200032, P. R. China
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Hu KZ, Ma J, Qiu S, Zheng X, Huang PQ. SmI2-mediated intermolecular coupling of γ-lactam N-α-radicals with activated alkenes: asymmetric synthesis of 11-hydroxylated analogues of the lead compounds CP-734432 and PF-04475270. J Org Chem 2012; 78:1790-801. [PMID: 22853560 DOI: 10.1021/jo301277n] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We report, for the first time, the synthesis of 8-aza-analogues of PGE2. The SmI2-mediated cross coupling reactions of γ-lactam-hemiaminal 9, lactam 2-pyridyl sulfide 17, and lactam 2-pyridyl sulfone 18 with activated alkenes/alkyne were first developed, giving the corresponding γ-lactams in 49-78%, 45-75%, and 75-90%, respectively. The reactions of lactam 2-pyridyl sulfide and 2-pyridyl sulfone proceeded with ≥12:1 trans-diastereoselectivities. This represents the first intermolecular coupling reaction of the γ-lactam N-α-alkyl radicals of types B, B1, and B2 with activated alkenes. Two radical-based mechanisms were suggested. The asymmetric synthesis of the 11-hydroxylated analogue of the highly selective EP4 receptor agonist PF-04475270 (30), the 11-hydroxylated analogue of ocular hypotensive CP-734432 (31), compounds 35 and 36 have been achieved on the basis of this method.
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Affiliation(s)
- Kong-Zhen Hu
- Department of Chemistry and Fujian Provincial Key Laboratory of Chemical Biology, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, PR China
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