1
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Badshah G, Gomes CMB, Ali S, Luz EQ, Silvério GL, Santana FS, Seckler D, Paixão DB, Schneider PH, Rampon DS. Palladium-Catalyzed Direct Selanylation of Chalcogenophenes and Arenes Assisted by 2-(Methylthio)amide. J Org Chem 2023; 88:14033-14047. [PMID: 37712931 DOI: 10.1021/acs.joc.3c01577] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/16/2023]
Abstract
The direct and selective conversion of a C-H bond into a C-Se bond remains a significant challenge, which is even more intricate with substrates having an innate regioselectivity under several reaction conditions, such as chalcogenophenes. We overrode their selectivity toward selanylation using palladium, copper, and the 2-(methylthio)amide directing group. This chelation-assisted direct selanylation was also suitable for mono and double ortho functionalization of arenes. The mechanistic studies indicate high-valent Pd(IV) species in the catalytic cycle, a reversible C-H activation step, and Cu(II) as a sequestering agent for organoselenide byproducts.
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Affiliation(s)
- Gul Badshah
- Laboratory of Polymers and Catalysis(LaPoCa),Department of Chemistry, Federal University of Paraná, P.O. Box 19061, Curitiba 81531-980, Paraná, Brazil
| | - Carla M B Gomes
- Laboratory of Polymers and Catalysis(LaPoCa),Department of Chemistry, Federal University of Paraná, P.O. Box 19061, Curitiba 81531-980, Paraná, Brazil
| | - Sher Ali
- Faculty of Animal Science and Food Engineering, University of São Paulo, Pirassununga 13635-900, São Paulo, Brazil
| | - Eduardo Q Luz
- Laboratory of Polymers and Catalysis(LaPoCa),Department of Chemistry, Federal University of Paraná, P.O. Box 19061, Curitiba 81531-980, Paraná, Brazil
| | - Gabriel L Silvério
- Laboratory of Polymers and Catalysis(LaPoCa),Department of Chemistry, Federal University of Paraná, P.O. Box 19061, Curitiba 81531-980, Paraná, Brazil
| | - Francielli S Santana
- Department of Chemistry, Federal University of Paraná, P.O. Box 19061, Curitiba 81531-990, Paraná, Brazil
| | - Diego Seckler
- Laboratory of Polymers and Catalysis(LaPoCa),Department of Chemistry, Federal University of Paraná, P.O. Box 19061, Curitiba 81531-980, Paraná, Brazil
| | - Douglas B Paixão
- Instituto de Química, Departamento de Química Orgânica, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre 91501-970, Rio Grande do Sul, Brazil
| | - Paulo H Schneider
- Instituto de Química, Departamento de Química Orgânica, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre 91501-970, Rio Grande do Sul, Brazil
| | - Daniel S Rampon
- Laboratory of Polymers and Catalysis(LaPoCa),Department of Chemistry, Federal University of Paraná, P.O. Box 19061, Curitiba 81531-980, Paraná, Brazil
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2
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Abstract
The furanocembranoid providencin remains an unconquered bastion, although the synthesis of 17-deoxyprovidencin─lacking a single -OH group─has been accomplished in the past. This paper describes a practical approach to a properly hydroxylated building block via an iridium-catalyzed photosensitized intramolecular [2 + 2] cycloaddition as the key step. While an attempt to convert this compound into providencin via RCAM failed, it might well be elaborated into the natural product by adopting the literature route.
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Affiliation(s)
- Simon M Spohr
- Max-Planck-Institut für Kohlenforschung, D-45470 Mülheim/Ruhr, Germany
| | - Alois Fürstner
- Max-Planck-Institut für Kohlenforschung, D-45470 Mülheim/Ruhr, Germany
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3
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Tuccinardi J, Wood JL. Total Syntheses of (+)-Ineleganolide and (-)-Sinulochmodin C. J Am Chem Soc 2022; 144:20539-20547. [PMID: 36283051 PMCID: PMC9651135 DOI: 10.1021/jacs.2c09826] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Indexed: 11/29/2022]
Abstract
Described herein are the first total syntheses of the nor-furanocembranoid natural products (+)-ineleganolide (1) and (-)-sinulochmodin C (2). The synthetic strategy is predicated on a transannular Michael reaction that provides both natural products from a common macrocyclic intermediate and leverages a diastereoselective radical cyclization to furnish a key bicyclic lactone. The latter is further advanced to a macrocyclic precursor via a Nozaki-Hiyama-Kishi cyclization and a one-pot furan oxidation/oxa-Michael cascade. Unexpected stereochemical nuances that guided the evolution and eventual completion of the total synthesis are discussed.
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Affiliation(s)
- Joseph
P. Tuccinardi
- Department of Chemistry and
Biochemistry, Baylor University, One Bear Place 97348, Waco, Texas 76798, United States
| | - John L. Wood
- Department of Chemistry and
Biochemistry, Baylor University, One Bear Place 97348, Waco, Texas 76798, United States
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4
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Huang RZ, Ma ZC, Huang Y, Zhao Y. Co/Zn Bimetallic Catalysis Enables Enantioselective Alkynylation of Isatins and α-Ketoesters Using Terminal Alkynes. J Org Chem 2022. [DOI: 10.1021/acs.joc.2c01369] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Rui-Zhi Huang
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543 Singapore
| | - Zhan-Cai Ma
- Department of Medicinal Chemistry, School of Pharmacy, Xi’an Jiaotong University, Xi’an 710061, China
| | - Yuan Huang
- Department of Medicinal Chemistry, School of Pharmacy, Xi’an Jiaotong University, Xi’an 710061, China
| | - Yu Zhao
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543 Singapore
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5
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E- and Z-trisubstituted macrocyclic alkenes for natural product synthesis and skeletal editing. Nat Chem 2022; 14:640-649. [PMID: 35577918 DOI: 10.1038/s41557-022-00935-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Accepted: 03/24/2022] [Indexed: 12/24/2022]
Abstract
Many therapeutic agents are macrocyclic trisubstituted alkenes but preparation of these structures is typically inefficient and non-selective. A possible solution would entail catalytic macrocyclic ring-closing metathesis, but these transformations require high catalyst loading, conformationally rigid precursors and are often low yielding and/or non-stereoselective. Here we introduce a ring-closing metathesis strategy for synthesis of trisubstituted macrocyclic olefins in either stereoisomeric form, regardless of the level of entropic assistance. The goal was achieved by addressing several unexpected difficulties, including complications arising from pre-ring-closing metathesis alkene isomerization. The power of the method is highlighted by two examples. The first is the near-complete reversal of substrate-controlled selectivity in the formation of a macrolactam related to an antifungal natural product. The other is a late-stage stereoselective generation of an E-trisubstituted alkene in a 24-membered ring, en route to the cytotoxic natural product dolabelide C.
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6
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Salituro LJ, Pazienza JE, Rychnovsky SD. Total Syntheses of Strasseriolide A and B, Antimalarial Macrolide Natural Products. Org Lett 2022; 24:1190-1194. [PMID: 35094508 DOI: 10.1021/acs.orglett.1c04340] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We report the first total syntheses of strasseriolide A and B. Strasseriolide B shows potent activity against the wild-type malaria parasite Plasmodium falciparum and good activity against a chloroquine-resistant strain. A convergent strategy was envisioned with an aldehyde-acid fragment and a vinyl iodide-alcohol fragment. Both fragments were prepared using chiral pool starting materials. They were combined with a Yamaguchi esterification and cyclized with a Nozaki-Hiyama-Kishi reaction. Strasseriolide B was assembled in a 16-step LLS.
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Affiliation(s)
- Leah J Salituro
- Department of Chemistry, University of California at Irvine, 1102 Natural Sciences II, Irvine, California 92697, United States
| | - Jessica E Pazienza
- Department of Chemistry, University of California at Irvine, 1102 Natural Sciences II, Irvine, California 92697, United States
| | - Scott D Rychnovsky
- Department of Chemistry, University of California at Irvine, 1102 Natural Sciences II, Irvine, California 92697, United States
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7
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Yuan P, Gerlinger CKG, Herberger J, Gaich T. Ten-Step Asymmetric Total Synthesis of (+)-Pepluanol A. J Am Chem Soc 2021; 143:11934-11938. [PMID: 34324326 DOI: 10.1021/jacs.1c05257] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The first asymmetric synthesis of pepluanol A (1) is presented. The synthesis route is very concise (10 steps) and features a Curtin-Hammett-driven stereoconvergent intramolecular Diels-Alder reaction. A Nozaki-Hiyama-Kishi reaction comprises the connective step, bringing together the seven-membered enone system bearing the dienophile and the diene in the side chain. Subsequent stereoconvergent IMDA reaction furnishes the carboskeleton of the natural product in only 7 steps. The reactions were carried out on a gram scale up to an advanced intermediate and including the stereoconvergent intramolecular Diels-Alder reaction.
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Affiliation(s)
- Po Yuan
- Institute of Organic Chemistry, University of Konstanz, Universitätsstrasse 10, Konstanz 78464, Germany
| | - Christa K G Gerlinger
- Institute of Organic Chemistry, University of Konstanz, Universitätsstrasse 10, Konstanz 78464, Germany
| | - Jan Herberger
- Institute of Inorganic Chemistry, University of Konstanz, Universitätsstrasse 10, Konstanz 78464, Germany
| | - Tanja Gaich
- Institute of Organic Chemistry, University of Konstanz, Universitätsstrasse 10, Konstanz 78464, Germany
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8
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Tracy JS, Kalnmals CA, Toste FD. Beyond Allylic Alkylation: Applications of Trost Chemistry in Complex Molecule Synthesis. Isr J Chem 2021. [DOI: 10.1002/ijch.202000103] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Jacob S. Tracy
- Dept. of Chemistry University of California, Berkeley MC 1460 Berkeley CA 94720 USA
| | | | - F. Dean Toste
- Dept. of Chemistry University of California, Berkeley MC 1460 Berkeley CA 94720 USA
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9
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A new approach towards the synthesis of bielschowskysin: Synthesis and photochemistry of an advanced macrocyclic enedione intermediate. Tetrahedron 2020. [DOI: 10.1016/j.tet.2020.131318] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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10
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Yadav S, Ramasastry SSV. Palladium-Catalyzed Intramolecular Alder-Ene Type Cycloisomerization Reactions. Chem Asian J 2020; 15:2764-2774. [PMID: 32667724 DOI: 10.1002/asia.202000683] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Revised: 07/14/2020] [Indexed: 02/06/2023]
Abstract
An overview of the recent literature on palladium-catalyzed intramolecular Alder-ene (IMAE) reaction of a variety of 1,n-unsaturated systems is presented. The reaction which was first reported by Trost and Lautens provided an efficient alternative to the thermal or Lewis acid catalyzed cycloisomerizations involving ene-type reaction. The IMAE cyclization of enynes and dienes has emerged as an important area and found significant applications in building up of complex molecular architectures and in the synthesis of several bioactive natural products. Since highly impactful reviews on this subject have covered the literature till 2015, this article focuses on summarizing the works subsequent to 2015.
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Affiliation(s)
- Sonu Yadav
- Organic Synthesis and Catalysis Lab, Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Knowledge City, Sector 81, S. A. S. Nagar, Manauli PO, Punjab, 140306, India
| | - S S V Ramasastry
- Organic Synthesis and Catalysis Lab, Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Knowledge City, Sector 81, S. A. S. Nagar, Manauli PO, Punjab, 140306, India
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11
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Zhang L, Shi Q, Cao T, Zhu S. Catalytic regio- and stereoselective intermolecular [5+2] cycloaddition via conjugative activation of oxidopyrylium. Chem Commun (Camb) 2020; 56:9533-9536. [PMID: 32691033 DOI: 10.1039/d0cc04309e] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A catalytic stereodivergent intermolecular [5+2] cycloaddition of maltol-type oxidopyrylium through conjugative activation was reported.
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Affiliation(s)
- Ling Zhang
- Key Lab of Functional Molecular Engineering of Guangdong Province
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510640
- P. R. China
| | - Qiu Shi
- Key Lab of Functional Molecular Engineering of Guangdong Province
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510640
- P. R. China
| | - Tongxiang Cao
- Key Lab of Functional Molecular Engineering of Guangdong Province
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510640
- P. R. China
| | - Shifa Zhu
- Key Lab of Functional Molecular Engineering of Guangdong Province
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510640
- P. R. China
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12
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Zheng K, Hong R. Stereoconfining macrocyclizations in the total synthesis of natural products. Nat Prod Rep 2019; 36:1546-1575. [DOI: 10.1039/c8np00094h] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
This review covers selected examples of point chirality-forming macrocyclizations in natural product total synthesis in the past three decades.
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Affiliation(s)
- Kuan Zheng
- Key Laboratory of Synthetic Chemistry of Natural Substances
- Center for Excellence in Molecular Synthesis
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
| | - Ran Hong
- Key Laboratory of Synthetic Chemistry of Natural Substances
- Center for Excellence in Molecular Synthesis
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
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13
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Lu J, Luo LS, Sha F, Li Q, Wu XY. Copper-catalyzed enantioselective alkynylation of pyrazole-4,5-diones with terminal alkynes. Chem Commun (Camb) 2019; 55:11603-11606. [DOI: 10.1039/c9cc05252f] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A copper-catalyzed enantioselective alkynylation between pyrazole-4,5-diones and terminal alkynes is developed, and both enantiomers of chiral propargylic alcohols can be achieved by using the ligand illustrated and its diastereomer.
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Affiliation(s)
- Jian Lu
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals
- School of Chemistry & Molecular Engineering
- East China University of Science and Technology
- Shanghai 200237
- P. R. China
| | - Ling-Shan Luo
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals
- School of Chemistry & Molecular Engineering
- East China University of Science and Technology
- Shanghai 200237
- P. R. China
| | - Feng Sha
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals
- School of Chemistry & Molecular Engineering
- East China University of Science and Technology
- Shanghai 200237
- P. R. China
| | - Qiong Li
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals
- School of Chemistry & Molecular Engineering
- East China University of Science and Technology
- Shanghai 200237
- P. R. China
| | - Xin-Yan Wu
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals
- School of Chemistry & Molecular Engineering
- East China University of Science and Technology
- Shanghai 200237
- P. R. China
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14
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Tetramethylguanidine-functionalized silica-coated iron oxide magnetic nanoparticles catalyzed one-pot three-component synthesis of furanone derivatives. J CHEM SCI 2018. [DOI: 10.1007/s12039-018-1572-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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15
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Rodríguez RI, Ramírez E, Yuste F, Sánchez-Obregón R, Alemán J. Asymmetric Synthesis of Secondary and Tertiary Propargylic Alcohols by Umpolung of Acetylenic Sulfones and ortho-Sulfinyl Carbanions. J Org Chem 2018; 83:1940-1947. [DOI: 10.1021/acs.joc.7b02887] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Ricardo I. Rodríguez
- Instituto
de Química, Universidad Nacional Autónoma de México, Circuito Exterior, Cd. Universitaria, Coyoacán 04510, México City, México
| | - Elsie Ramírez
- Instituto
de Química, Universidad Nacional Autónoma de México, Circuito Exterior, Cd. Universitaria, Coyoacán 04510, México City, México
| | - Francisco Yuste
- Instituto
de Química, Universidad Nacional Autónoma de México, Circuito Exterior, Cd. Universitaria, Coyoacán 04510, México City, México
| | - Rubén Sánchez-Obregón
- Instituto
de Química, Universidad Nacional Autónoma de México, Circuito Exterior, Cd. Universitaria, Coyoacán 04510, México City, México
| | - José Alemán
- Departamento
de Química Orgánica (módulo-1), Universidad Autónoma de Madrid, Cantoblanco, 28049, Madrid, Spain
- Institute
for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, 28049, Madrid, Spain
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16
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Zavesky BP, Johnson JS. Direct Zinc(II)-Catalyzed Enantioconvergent Additions of Terminal Alkynes to α-Keto Esters. Angew Chem Int Ed Engl 2017; 56:8805-8808. [PMID: 28557339 PMCID: PMC5554871 DOI: 10.1002/anie.201704226] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2017] [Revised: 05/27/2017] [Indexed: 11/11/2022]
Abstract
The addition of terminal alkynes to racemic β-stereogenic α-keto esters was achieved in high levels of stereoselectivity, affording versatile tertiary propargylic alcohols containing two stereocenters. This environmentally benign enantioconvergent reaction proceeds with perfect atom economy, requires no solvent, and is catalyzed by a non-toxic zinc salt. The alkyne moiety can be leveraged in downstream transformations including hydrogenation to the corresponding saturated tertiary alcohol, which represents the product of a formal enantioconvergent aliphatic nucleophile addition.
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Affiliation(s)
- Blane P Zavesky
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599-3290, USA
| | - Jeffrey S Johnson
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599-3290, USA
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17
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McAulay K, Clark JS. Total Synthesis of 7-epi
-Pukalide and 7-Acetylsinumaximol B. Chemistry 2017; 23:9761-9765. [DOI: 10.1002/chem.201702591] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2017] [Indexed: 11/10/2022]
Affiliation(s)
- Kirsten McAulay
- WestCHEM; School of Chemistry, Joseph Black Building, University of Glasgow; University Avenue Glasgow G12 8QQ UK
| | - J. Stephen Clark
- WestCHEM; School of Chemistry, Joseph Black Building, University of Glasgow; University Avenue Glasgow G12 8QQ UK
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18
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Zavesky BP, Johnson JS. Direct Zinc(II)-Catalyzed Enantioconvergent Additions of Terminal Alkynes to α-Keto Esters. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201704226] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Blane P. Zavesky
- Department of Chemistry; University of North Carolina at Chapel Hill; Chapel Hill NC 27599-3290 USA
| | - Jeffrey S. Johnson
- Department of Chemistry; University of North Carolina at Chapel Hill; Chapel Hill NC 27599-3290 USA
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19
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Rummelt SM, Cheng G, Gupta P, Thiel W, Fürstner A. Hydroxy‐Directed Ruthenium‐Catalyzed Alkene/Alkyne Coupling: Increased Scope, Stereochemical Implications, and Mechanistic Rationale. Angew Chem Int Ed Engl 2017; 56:3599-3604. [DOI: 10.1002/anie.201700342] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2017] [Indexed: 11/08/2022]
Affiliation(s)
| | - Gui‐Juan Cheng
- Max-Planck-Institut für Kohlenforschung 45470 Mülheim/Ruhr Germany
| | - Puneet Gupta
- Max-Planck-Institut für Kohlenforschung 45470 Mülheim/Ruhr Germany
| | - Walter Thiel
- Max-Planck-Institut für Kohlenforschung 45470 Mülheim/Ruhr Germany
| | - Alois Fürstner
- Max-Planck-Institut für Kohlenforschung 45470 Mülheim/Ruhr Germany
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20
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Rummelt SM, Cheng G, Gupta P, Thiel W, Fürstner A. Hydroxy‐Directed Ruthenium‐Catalyzed Alkene/Alkyne Coupling: Increased Scope, Stereochemical Implications, and Mechanistic Rationale. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201700342] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
| | - Gui‐Juan Cheng
- Max-Planck-Institut für Kohlenforschung 45470 Mülheim/Ruhr Germany
| | - Puneet Gupta
- Max-Planck-Institut für Kohlenforschung 45470 Mülheim/Ruhr Germany
| | - Walter Thiel
- Max-Planck-Institut für Kohlenforschung 45470 Mülheim/Ruhr Germany
| | - Alois Fürstner
- Max-Planck-Institut für Kohlenforschung 45470 Mülheim/Ruhr Germany
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21
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Sempere Molina Y, Ruchti J, Carreira EM. Enantioselective Addition of Alkynes to α,α-Dichlorinated Aldehydes. Org Lett 2017; 19:743-745. [PMID: 28127958 DOI: 10.1021/acs.orglett.6b03692] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Enantioselective addition of terminal alkynes to α,α-dichlorinated aldehydes employing Zn(OTf)2/NME is disclosed. The propargylic alcohols obtained are accessed in good yields and high enantioselectivity from easily accessible α,α-dichloroaldehydes. The method opens new strategic opportunities for the synthesis of chlorinated natural products, such as the chlorosulfolipids.
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Affiliation(s)
- Yeshua Sempere Molina
- Laboratorium für Organische Chemie, ETH Zürich , Vladimir-Prelog-Weg 3, 8093 Zürich, Switzerland
| | - Jonathan Ruchti
- Laboratorium für Organische Chemie, ETH Zürich , Vladimir-Prelog-Weg 3, 8093 Zürich, Switzerland
| | - Erick M Carreira
- Laboratorium für Organische Chemie, ETH Zürich , Vladimir-Prelog-Weg 3, 8093 Zürich, Switzerland
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22
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Vijayaprasad P, Venkanna A, Shanker M, Kishan E, Venkateswar Rao P. Triflic acid promoted solvent free synthesis of densely functionalized furans. RSC Adv 2017. [DOI: 10.1039/c7ra00489c] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A simple, efficient and novel methodology has been developed for the synthesis of substituted furans mediated by triflic acid. In the reaction initial step involves the Friedel–Crafts arylation, followed by the dehydrative cyclization.
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Affiliation(s)
- Pulaganti Vijayaprasad
- Department of Chemistry
- University College of Science
- Osmania University
- Hyderabad 500007
- India
| | - Avudoddi Venkanna
- Department of Chemistry
- University College of Science
- Osmania University
- Hyderabad 500007
- India
| | - Medi Shanker
- Department of Chemistry
- University College of Science
- Osmania University
- Hyderabad 500007
- India
| | - Eslavath Kishan
- Department of Chemistry
- University College of Science
- Osmania University
- Hyderabad 500007
- India
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23
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Chen Q, Tang Y, Huang T, Liu X, Lin L, Feng X. Copper/Guanidine-Catalyzed Asymmetric Alkynylation of Isatins. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201600711] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Quangang Chen
- Key Laboratory of Green Chemistry & Technology; Ministry of Education, College of Chemistry; Sichuan University; Chengdu 610064 China
| | - Yu Tang
- Key Laboratory of Green Chemistry & Technology; Ministry of Education, College of Chemistry; Sichuan University; Chengdu 610064 China
| | - Tianyu Huang
- Key Laboratory of Green Chemistry & Technology; Ministry of Education, College of Chemistry; Sichuan University; Chengdu 610064 China
| | - Xiaohua Liu
- Key Laboratory of Green Chemistry & Technology; Ministry of Education, College of Chemistry; Sichuan University; Chengdu 610064 China
| | - Lili Lin
- Key Laboratory of Green Chemistry & Technology; Ministry of Education, College of Chemistry; Sichuan University; Chengdu 610064 China
| | - Xiaoming Feng
- Key Laboratory of Green Chemistry & Technology; Ministry of Education, College of Chemistry; Sichuan University; Chengdu 610064 China
- Collaborative Innovation Center of Chemical Science and Engineering; Tianjin 300072 China
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24
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Chen Q, Tang Y, Huang T, Liu X, Lin L, Feng X. Copper/Guanidine-Catalyzed Asymmetric Alkynylation of Isatins. Angew Chem Int Ed Engl 2016; 55:5286-9. [DOI: 10.1002/anie.201600711] [Citation(s) in RCA: 80] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2016] [Indexed: 11/08/2022]
Affiliation(s)
- Quangang Chen
- Key Laboratory of Green Chemistry & Technology; Ministry of Education, College of Chemistry; Sichuan University; Chengdu 610064 China
| | - Yu Tang
- Key Laboratory of Green Chemistry & Technology; Ministry of Education, College of Chemistry; Sichuan University; Chengdu 610064 China
| | - Tianyu Huang
- Key Laboratory of Green Chemistry & Technology; Ministry of Education, College of Chemistry; Sichuan University; Chengdu 610064 China
| | - Xiaohua Liu
- Key Laboratory of Green Chemistry & Technology; Ministry of Education, College of Chemistry; Sichuan University; Chengdu 610064 China
| | - Lili Lin
- Key Laboratory of Green Chemistry & Technology; Ministry of Education, College of Chemistry; Sichuan University; Chengdu 610064 China
| | - Xiaoming Feng
- Key Laboratory of Green Chemistry & Technology; Ministry of Education, College of Chemistry; Sichuan University; Chengdu 610064 China
- Collaborative Innovation Center of Chemical Science and Engineering; Tianjin 300072 China
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25
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Choe H, Pham TT, Lee JY, Latif M, Park H, Kang YK, Lee J. Remote Stereoinductive Intramolecular Nitrile Oxide Cycloaddition: Asymmetric Total Synthesis and Structure Revision of (-)-11β-Hydroxycurvularin. J Org Chem 2016; 81:2612-7. [PMID: 26894643 DOI: 10.1021/acs.joc.5b02760] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
The first total synthesis and structure revision of (-)-11β-hydroxycurvularin (1b), a macrolide possessing a β-hydroxyketone moiety, were accomplished. The β-hydroxyketone moiety in this natural product was introduced by cleavage of the N-O bond in an isoxazoline ring that was formed diastereoselectively in a 1,5-remote stereocontrolled fashion by employing intramolecular nitrile oxide cycloaddition.
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Affiliation(s)
- Hyeonjeong Choe
- Drug Discovery Division, Korea Research Institute of Chemical Technology , Yuseong, Daejeon 34114, Republic of Korea
| | - Thuy Trang Pham
- College of Pharmacy, Kangwon National University , 1 Kangwondaehak-gil, Chuncheon, Gangwon-do 24341, Republic of Korea
| | - Joo Yun Lee
- Drug Discovery Division, Korea Research Institute of Chemical Technology , Yuseong, Daejeon 34114, Republic of Korea
| | - Muhammad Latif
- Drug Discovery Division, Korea Research Institute of Chemical Technology , Yuseong, Daejeon 34114, Republic of Korea
| | - Haeil Park
- College of Pharmacy, Kangwon National University , 1 Kangwondaehak-gil, Chuncheon, Gangwon-do 24341, Republic of Korea
| | - Young Kee Kang
- Department of Chemistry, Chungbuk National University , 1 Chungdae-ro, Seowon-gu, Cheongju, Chungbuk 28644, Republic of Korea
| | - Jongkook Lee
- College of Pharmacy, Kangwon National University , 1 Kangwondaehak-gil, Chuncheon, Gangwon-do 24341, Republic of Korea
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26
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Jena BK, Reddy AVV, Mohapatra DK. Total Synthesis of Sacrolide A by Following a Nozaki-Hiyama-Kishi Macrocyclization Strategy. ASIAN J ORG CHEM 2016. [DOI: 10.1002/ajoc.201500537] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Bighnanshu K. Jena
- Natural Products Chemistry Division; CSIR-Indian Institute of Chemical Technology; Hyderabad 500 007 INDIA
| | - Aedula Vishnu V. Reddy
- Natural Products Chemistry Division; CSIR-Indian Institute of Chemical Technology; Hyderabad 500 007 INDIA
| | - Debendra K. Mohapatra
- Natural Products Chemistry Division; CSIR-Indian Institute of Chemical Technology; Hyderabad 500 007 INDIA
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27
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Lazreg F, Lesieur M, Samson AJ, Cazin CSJ. Light-Stable Silver N-Heterocyclic Carbene Catalysts for the Alkynylation of Ketones in Air. ChemCatChem 2015. [DOI: 10.1002/cctc.201500869] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Faïma Lazreg
- EaStCHEM School of Chemistry; University of St Andrews; KY16 9ST St Andrews U.K
| | - Mathieu Lesieur
- EaStCHEM School of Chemistry; University of St Andrews; KY16 9ST St Andrews U.K
| | - Andrew J. Samson
- EaStCHEM School of Chemistry; University of St Andrews; KY16 9ST St Andrews U.K
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28
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Emami FS, Vahid A, Wylie EK, Szymkuć S, Dittwald P, Molga K, Grzybowski BA. A Priori Estimation of Organic Reaction Yields. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/anie.201503890] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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29
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Emami FS, Vahid A, Wylie EK, Szymkuć S, Dittwald P, Molga K, Grzybowski BA. A Priori Estimation of Organic Reaction Yields. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201503890] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Fateme S. Emami
- Department of Chemical and Biological Engineering, Northwestern University (USA)
| | - Amir Vahid
- Department of Chemical and Biological Engineering, Northwestern University (USA)
| | - Elizabeth K. Wylie
- Department of Chemical and Biological Engineering, Northwestern University (USA)
| | - Sara Szymkuć
- Institute of Organic Chemistry, Polish Academy of Sciences, Warsaw (Poland)
| | - Piotr Dittwald
- Institute of Organic Chemistry, Polish Academy of Sciences, Warsaw (Poland)
| | - Karol Molga
- Institute of Organic Chemistry, Polish Academy of Sciences, Warsaw (Poland)
| | - Bartosz A. Grzybowski
- Institute of Organic Chemistry, Polish Academy of Sciences, Warsaw (Poland)
- Department of Chemistry and the IBS Center for Soft and Living Matter, UNIST, Ulsan (South Korea)
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30
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Palframan MJ, Pattenden G. The versatility of furfuryl alcohols and furanoxonium ions in synthesis. Chem Commun (Camb) 2015; 50:7223-42. [PMID: 24728307 DOI: 10.1039/c4cc01196a] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Substituted furfuryl alcohols are extraordinarily versatile starting materials in synthesis. They are precursors to furanoxonium ion intermediates which are implicated in the Piancatelli reaction (leading to 2-cyclopentenones) and in the synthesis of novel dihydrofuran-based exo enol ether/cyclic ketal natural products. They are also intermediates in a recently discovered (4+3) cycloaddition reaction with 1,3-dienes leading to furan ring-fused cycloheptenes. Here we provide a perspective on recent developments in these areas of synthesis, alongside recent applications of the Achmatowicz reaction and [5+2] cycloaddition reactions of the resulting oxidopyrylium ions.
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31
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Zhao YM, Maimone TJ. Short, enantioselective total synthesis of chatancin. Angew Chem Int Ed Engl 2015; 54:1223-6. [PMID: 25470723 PMCID: PMC4300267 DOI: 10.1002/anie.201410443] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2014] [Indexed: 11/06/2022]
Abstract
An enantioselective total synthesis of the polycyclic diterpene (+)-chatancin, a potent PAF antagonist, is reported. Proceeding in seven steps from dihydrofarnesal, this synthetic route was designed to circumvent macrocyclization-based strategies to complex, cyclized cembranoids. The described synthesis requires only six chromatographic purifications, is high yielding, and avoids protecting-group manipulations. An X-ray crystal structure of this fragile marine natural product was obtained.
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Affiliation(s)
- Yu-Ming Zhao
- Department of Chemistry, University of California, Berkeley, 826 Latimer Hall, Berkeley, CA 94720 (USA)
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32
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Photochemical formation of intricarene. Nat Commun 2014; 5:5597. [PMID: 25470600 DOI: 10.1038/ncomms6597] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2014] [Accepted: 10/17/2014] [Indexed: 11/09/2022] Open
Abstract
Sunlight is the ultimate driver of biosynthesis but photochemical steps late in biosynthetic pathways are very rare. They appear to play a role in the formation of certain furanocembranoids isolated from Caribbean corals. One of these compounds, intricarene, has been suspected to arise from an intramolecular 1,3-dipolar cycloaddition involving an oxidopyrylium. Here we show, by a combination of experiments and theory, that the oxidopyrylium forms under photochemical conditions and that its cycloaddition occurs via a triplet state. The formation of a complex by-product can be rationalized by another photochemical step that involves a conical intersection. Our work raises the question whether intricarene is biosynthesized in the natural habitat of the corals or is an artefact formed during workup. It also demonstrates that the determination of exact irradiation spectra, in combination with quantum chemical calculations, enables the rationalization of complex reaction pathways that involve multiple excited states.
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33
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34
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Bolte B, Basutto JA, Bryan CS, Garson MJ, Banwell MG, Ward JS. Modular total syntheses of the marine-derived resorcylic Acid lactones cochliomycins a and B using a late-stage nozaki-hiyama-kishi macrocyclization reaction. J Org Chem 2014; 80:460-70. [PMID: 25405580 DOI: 10.1021/jo5024602] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The natural products cochliomycin A (1) and cochliomycin B (2), two resorcylic acid lactones obtained from marine sources, have been prepared in a concise and stereocontrolled manner from the readily accessible building blocks 4-6. Olefin cross-metathesis, trans-esterification and Nozaki-Hiyama-Kishi (NHK) macrocyclization reactions were employed in the key steps. Hydrolysis of the immediate precursor to cochliomycin B affords the resorcylic acid lactone zeaenol (24).
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Affiliation(s)
- Benoit Bolte
- †Research School of Chemistry, Institute of Advanced Studies, The Australian National University, Canberra ACT 2601, Australia
| | - Jose A Basutto
- †Research School of Chemistry, Institute of Advanced Studies, The Australian National University, Canberra ACT 2601, Australia
| | - Christopher S Bryan
- †Research School of Chemistry, Institute of Advanced Studies, The Australian National University, Canberra ACT 2601, Australia
| | - Mary J Garson
- ‡School of Chemistry and Molecular Biosciences, University of Queensland, Brisbane QLD 4072, Australia
| | - Martin G Banwell
- †Research School of Chemistry, Institute of Advanced Studies, The Australian National University, Canberra ACT 2601, Australia
| | - Jas S Ward
- †Research School of Chemistry, Institute of Advanced Studies, The Australian National University, Canberra ACT 2601, Australia
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35
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Lv L, Shen B, Li Z. Total Synthesis of (±)-Clavilactones A, B, and Proposed D through Iron-Catalyzed Carbonylation-Peroxidation of Olefin. Angew Chem Int Ed Engl 2014; 53:4164-7. [DOI: 10.1002/anie.201400326] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2014] [Indexed: 11/07/2022]
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36
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Lv L, Shen B, Li Z. Total Synthesis of (±)-Clavilactones A, B, and Proposed D through Iron-Catalyzed Carbonylation-Peroxidation of Olefin. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201400326] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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37
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White JD, Jana S. Studies of the Synthesis of Providencin: Construction and Assembly of Two Major Subunits. J Org Chem 2014; 79:700-10. [DOI: 10.1021/jo402485h] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- James D. White
- Department
of Chemistry, Oregon State University, Corvallis, Oregon 97331-4003, United States
| | - Somnath Jana
- Department
of Chemistry, Oregon State University, Corvallis, Oregon 97331-4003, United States
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38
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Mohapatra DK, Reddy DS, Mallampudi NA, Gaddam J, Polepalli S, Jain N, Yadav JS. The protecting-group directed diastereoselective Nozaki–Hiyama–Kishi (NHK) reaction: total synthesis and biological evaluation of zeaenol, 7-epi-zeaenol and its analogues. Org Biomol Chem 2014; 12:9683-95. [DOI: 10.1039/c4ob01811g] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A convergent and concise total synthesis of zeaenol, 7-epi-zeaenol, and its analogues is achieved using protecting group-directed NHK reaction.
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Affiliation(s)
- Debendra K. Mohapatra
- Natural Products Chemistry Division
- CSIR-Indian Institute of Chemical Technology
- Hyderabad 500 007, India
- Academy of Scientific and Innovative Research
- New Delhi, India
| | - D. Sai Reddy
- Natural Products Chemistry Division
- CSIR-Indian Institute of Chemical Technology
- Hyderabad 500 007, India
- Academy of Scientific and Innovative Research
- New Delhi, India
| | - N. Arjunreddy Mallampudi
- Natural Products Chemistry Division
- CSIR-Indian Institute of Chemical Technology
- Hyderabad 500 007, India
| | - Janardhan Gaddam
- Natural Products Chemistry Division
- CSIR-Indian Institute of Chemical Technology
- Hyderabad 500 007, India
- Academy of Scientific and Innovative Research
- New Delhi, India
| | - Sowjanya Polepalli
- Chemical Biology
- CSIR-Indian Institute of Chemical Technology
- Hyderabad 500007, India
| | - Nishant Jain
- Chemical Biology
- CSIR-Indian Institute of Chemical Technology
- Hyderabad 500007, India
| | - J. S. Yadav
- Natural Products Chemistry Division
- CSIR-Indian Institute of Chemical Technology
- Hyderabad 500 007, India
- Academy of Scientific and Innovative Research
- New Delhi, India
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39
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Chen IT, Baitinger I, Schreyer L, Trauner D. Total synthesis of sandresolide B and amphilectolide. Org Lett 2013; 16:166-9. [PMID: 24308854 DOI: 10.1021/ol403156r] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
The total synthesis of the diterpenoids sandresolide B and amphilectolide from a common furan building block is presented. Key steps include palladium-mediated carbonylation, lanthanide catalyzed ring closure, Myers alkylation, intramolecular Friedel-Crafts acylation, photooxygenation, and a Kornblum-DeLaMare rearrangement.
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Affiliation(s)
- Ingrid T Chen
- Department of Chemistry and Center of Integrated Protein Science, University of Munich , Butenandtstrasse 5 - 13 (F4.086), 81377 Munich, Germany
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40
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Himmelbauer M, Farcet JB, Gagnepain J, Mulzer J. An Approach to the Carbon Backbone of Bielschowskysin, Part 1: Photocyclization Strategy. European J Org Chem 2013. [DOI: 10.1002/ejoc.201300869] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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41
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Meyer ME, Phillips JH, Ferreira EM, Stoltz BM. Use of a palladium(II)-catalyzed oxidative kinetic resolution in synthetic efforts toward bielschowskysin. Tetrahedron 2013; 69:7627-7635. [PMID: 23913988 DOI: 10.1016/j.tet.2013.02.034] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Progress toward the cyclobutane core of bielshowskysin is reported. The core was thought to arise from a cyclopropane intermediate via a furan-mediated cyclopropane fragmentation, followed by a 1,4-Michael addition. The synthesis of the cyclopropane intermediate utilizes a Suzuki coupling reaction, an esterification with 2-diazoacetoacetic acid, and a copper catalyzed cyclopropanation. An alcohol intermediate within the synthetic route was obtained in high enantiopurity via a highly selective palladium(II)-catalyzed oxidative kinetic resolution (OKR).
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Affiliation(s)
- Michael E Meyer
- Division of Chemistry and Chemical Engineering, California Institute of Technology, 1200 East California Boulevard, MC 101-20, Pasadena, CA 91125, USA
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42
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Himmelbauer M, Farcet JB, Gagnepain J, Mulzer J. A palladium-catalyzed carbo-oxygenation: the bielschowskysin case. Org Lett 2013; 15:3098-101. [PMID: 23724910 PMCID: PMC3691719 DOI: 10.1021/ol401285d] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2013] [Indexed: 01/18/2023]
Abstract
An asymmetric synthesis of an advanced tetracyclic intermediate toward the synthesis of bielschowskysin (1) is described. A biomimetic [2 + 2]-photocyclization was used to establish the cyclobutane core of bielschowskysin. Macrocyclization under Heck conditions led to an unprecedented carbo-oxygenation of a 1,1-disubstituted double bond.
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Affiliation(s)
- Martin Himmelbauer
- University of Vienna, Department of Organic Chemistry, Währinger Str. 38, 1090 Vienna, Austria
| | - Jean-Baptiste Farcet
- University of Vienna, Department of Organic Chemistry, Währinger Str. 38, 1090 Vienna, Austria
| | - Julien Gagnepain
- University of Vienna, Department of Organic Chemistry, Währinger Str. 38, 1090 Vienna, Austria
| | - Johann Mulzer
- University of Vienna, Department of Organic Chemistry, Währinger Str. 38, 1090 Vienna, Austria
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43
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Abstract
An efficient stereoselective synthesis of furanoverrillin (5), a highly functionalized core of verrillin (1), is reported. The synthetic strategy is based on constructing bicyclic lactone 17 prior to the 10-membered ring macrocyclization. The effect of the C4 methyl group on the furan reactivity is also discussed.
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Affiliation(s)
- Alec Saitman
- Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive MC: 0358, La Jolla, California 92093-0358, United States
| | - Emmanuel A. Theodorakis
- Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive MC: 0358, La Jolla, California 92093-0358, United States
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44
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Saitman A, Sullivan SDE, Theodorakis EA. A strategy toward the synthesis of C 13-oxidized cembrenolides. Tetrahedron Lett 2013; 54:1612-1615. [PMID: 23626379 DOI: 10.1016/j.tetlet.2013.01.085] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
An efficient strategy for the construction of C13-oxidized cembrenolides is reported. Central to this strategy is the installation of the C13 hydroxyl group prior to cembrane macrocyclization (via formation of the C1-C2 bond), allowing access to both C13 alcohol epimers. The orientation of the C13 alcohol was found to influence the cyclization mode of the cembranolide scaffold upon furan oxidation, leading to motifs reminiscent to bipinnatolide F, bielschowskysin, and verrillin.
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Affiliation(s)
- Alec Saitman
- Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093-0358, United States
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45
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Infante R, Gago A, Nieto J, Andrés C. Enantiocontrolled Synthesis of Tertiary α-Hydroxy-α-ynyl Esters by Dimethylzinc-Mediated Addition of Alkynes to α-Keto Esters. Adv Synth Catal 2012. [DOI: 10.1002/adsc.201200185] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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46
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Chen W, Tay JH, Yu XQ, Pu L. Diastereoselective [4 + 1] Cycloaddition of Alkenyl Propargyl Acetates with CO Catalyzed by [RhCl(CO)2]2. J Org Chem 2012; 77:6215-22. [DOI: 10.1021/jo3009403] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Wei Chen
- Department of Chemistry, Sichuan University, Chengdu, China 610064
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904-4319,
United States
| | - Jia-Hui Tay
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904-4319,
United States
| | - Xiao-Qi Yu
- Department of Chemistry, Sichuan University, Chengdu, China 610064
| | - Lin Pu
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904-4319,
United States
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47
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Zheng B, Li SN, Mao JY, Wang B, Bian QH, Liu SZ, Zhong JC, Guo HC, Wang M. Highly Enantioselective Addition of 1,3-Diynes to Aldehydes Catalyzed by a Zinc-Amino Alcohol Complex. Chemistry 2012; 18:9208-11. [DOI: 10.1002/chem.201200728] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2012] [Indexed: 11/06/2022]
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48
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Saitman A, Rulliere P, Sullivan SDE, Theodorakis EA. Total synthesis of norcembrenolide B and scabrolide D. Org Lett 2011; 13:5854-7. [PMID: 21973225 DOI: 10.1021/ol202476j] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
An efficient stereoselective synthesis of norcembrenolide B (8) and scabrolide D (9) is reported. The strategy is inspired by biogenetic relationships of related cembrenoids. Central to this approach is the construction of norbipinnatin J which upon selective C2 deoxygenation and C8 oxygenation produces norrubifolide and norcoralloidolide A. A sequence of site-selective oxidations and skeletal reorganizations then yields, in a divergent manner, compounds 8 and 9. The studies allow revision of the proposed structure of scabrolide D (9), which is identical to norcembrenolide C.
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Affiliation(s)
- Alec Saitman
- Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive MC: 0358, La Jolla, California 92093-0358, USA
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49
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Li ZY, Wang M, Bian QH, Zheng B, Mao JY, Li SN, Liu SZ, Wang MA, Zhong JC, Guo HC. Highly Enantioselective Addition of Trimethylsilylacetylene to Aldehydes Catalyzed by a Zinc-Amino-Alcohol Complex. Chemistry 2011; 17:5782-6. [DOI: 10.1002/chem.201100535] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2011] [Indexed: 11/11/2022]
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50
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Li Y, Pattenden G. Perspectives on the structural and biosynthetic interrelationships between oxygenated furanocembranoids and their polycyclic congeners found in corals. Nat Prod Rep 2011; 28:1269-310. [DOI: 10.1039/c1np00023c] [Citation(s) in RCA: 95] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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