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Petruncio G, Shellnutt Z, Young LL, Girgis M, Strangman WK, Williamson RT, Kehn-Hall K, Paige M. Total Synthesis of Homoseongomycin Enantiomers and Evaluation of Their Optical Rotation. ACS OMEGA 2024; 9:30993-30997. [PMID: 39035929 PMCID: PMC11256097 DOI: 10.1021/acsomega.4c04249] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/03/2024] [Revised: 06/19/2024] [Accepted: 06/21/2024] [Indexed: 07/23/2024]
Abstract
A total synthesis of each homoseongomycin enantiomer was accomplished in 17 total steps (longest linear sequence = 12 steps) and 10 chromatographic purifications. Several schemes were attempted to forge the key 5-membered ring, but only a Suzuki coupling-intramolecular Friedel-Crafts acylation sequence proved viable. Challenges encountered during the optical rotation characterization of the natural product left us with two important takeaways. First, highly colored compounds like homoseongomycin that absorb near/at the sodium d-line may require optical rotation measurements at other wavelengths. Second, high dilution of such compounds to obtain measurement at the sodium d-line could result in artificially large and incorrectly assigned specific rotations. To verify the optical rotation, electronic circular dichroism spectra were acquired for both homoseongomycin enantiomers and were transformed into optical rotary dispersions via the Kramers-Kronig transform. We note the wavelength dependency on rotation, and at the sodium d-line 589 nm, we reassign the optical rotation of L-homoseongomycin from (-) to (+).
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Affiliation(s)
- Greg Petruncio
- Department
of Chemistry & Biochemistry, George
Mason University, 10920 George Mason Circle, Manassas, Virginia 20110, United States
- Center
for Molecular Engineering, George Mason
University, 10920 George
Mason Circle, Manassas, Virginia 20110, United States
| | - Zachary Shellnutt
- Department
of Chemistry & Biochemistry, George
Mason University, 10920 George Mason Circle, Manassas, Virginia 20110, United States
| | - Lauren L. Young
- Department
of Chemistry & Biochemistry, George
Mason University, 10920 George Mason Circle, Manassas, Virginia 20110, United States
| | - Michael Girgis
- Center
for Molecular Engineering, George Mason
University, 10920 George
Mason Circle, Manassas, Virginia 20110, United States
- Department
of Bioengineering, George Mason University, 10920 George Mason Circle, Manassas, Virginia 20110, United States
| | - Wendy K. Strangman
- Department
of Chemistry and Biochemistry, Center for Marine Science, University of North Carolina Wilmington, Wilmington, North Carolina 28409, United States
| | - R. Thomas Williamson
- Department
of Chemistry and Biochemistry, Center for Marine Science, University of North Carolina Wilmington, Wilmington, North Carolina 28409, United States
| | - Kylene Kehn-Hall
- Department
of Biomedical Sciences and Pathobiology, Virginia−Maryland
College of Veterinary Medicine, Virginia
Polytechnic Institute and State University, Blacksburg, Virginia, 24061, United States
- Center
for
Emerging, Zoonotic, and Arthropod-Borne Pathogens, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061, United States
| | - Mikell Paige
- Department
of Chemistry & Biochemistry, George
Mason University, 10920 George Mason Circle, Manassas, Virginia 20110, United States
- Center
for Molecular Engineering, George Mason
University, 10920 George
Mason Circle, Manassas, Virginia 20110, United States
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Electro-redox strategy for synthesis of dehydroaltenusin analogs through alkoxy-oxylactonizative phenol dearomatization. Tetrahedron 2022. [DOI: 10.1016/j.tet.2022.133238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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3
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Swieca P, Spiteller P. Total Synthesis of Bulgarein. European J Org Chem 2022. [DOI: 10.1002/ejoc.202101576] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Patrick Swieca
- University of Bremen: Universitat Bremen Department of Biology an Chemistry Leobener Strasse 7 28359 Bremen GERMANY
| | - Peter Spiteller
- Universit�t Bremen Studiengang Chemie Leobener Strasse NW2 C 28359 Bremen GERMANY
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Das J, Mal DK, Maji S, Maiti D. Recent Advances in External-Directing-Group-Free C–H Functionalization of Carboxylic Acids without Decarboxylation. ACS Catal 2021. [DOI: 10.1021/acscatal.1c00176] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Jayabrata Das
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Dibya Kanti Mal
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Suman Maji
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Debabrata Maiti
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
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Heravi MM, Zadsirjan V, Saedi P, Momeni T. Applications of Friedel-Crafts reactions in total synthesis of natural products. RSC Adv 2018; 8:40061-40163. [PMID: 35558228 PMCID: PMC9091380 DOI: 10.1039/c8ra07325b] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2018] [Accepted: 11/03/2018] [Indexed: 12/17/2022] Open
Abstract
Over the years, Friedel-Crafts (FC) reactions have been acknowledged as the most useful and powerful synthetic tools for the construction of a special kind of carbon-carbon bond involving an aromatic moiety. Its stoichiometric and, more recently, its catalytic procedures have extensively been studied. This reaction in recent years has frequently been used as a key step (steps) in the total synthesis of natural products and targeted complex bioactive molecules. In this review, we try to underscore the applications of intermolecular and intramolecular FC reactions in the total syntheses of natural products and complex molecules, exhibiting diverse biological properties.
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Affiliation(s)
- Majid M Heravi
- Department of Chemistry, School of Science, Alzahra University Vanak Tehran Iran +98 2188041344 +98 9121329147
| | - Vahideh Zadsirjan
- Department of Chemistry, School of Science, Alzahra University Vanak Tehran Iran +98 2188041344 +98 9121329147
| | - Pegah Saedi
- Department of Chemistry, School of Science, Alzahra University Vanak Tehran Iran +98 2188041344 +98 9121329147
| | - Tayebeh Momeni
- Department of Chemistry, School of Science, Alzahra University Vanak Tehran Iran +98 2188041344 +98 9121329147
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François B, Szczubelek L, Berrée F, Roisnel T, Carboni B. Palladium-Catalyzed Cross-Coupling/Annulation Cascade for Synthesis of 9-Hydroxy and 9-Aminofluorenes. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201701146] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Benjamin François
- Institut des Sciences Chimiques de Rennes; UMR CNRS 6226; Université de Rennes 1; 263, Avenue du Général Leclerc, Campus de Beaulieu 35042 Rennes CEDEX France
| | - Luc Szczubelek
- Institut des Sciences Chimiques de Rennes; UMR CNRS 6226; Université de Rennes 1; 263, Avenue du Général Leclerc, Campus de Beaulieu 35042 Rennes CEDEX France
| | - Fabienne Berrée
- Institut des Sciences Chimiques de Rennes; UMR CNRS 6226; Université de Rennes 1; 263, Avenue du Général Leclerc, Campus de Beaulieu 35042 Rennes CEDEX France
| | - Thierry Roisnel
- Institut des Sciences Chimiques de Rennes; UMR CNRS 6226; Université de Rennes 1; 263, Avenue du Général Leclerc, Campus de Beaulieu 35042 Rennes CEDEX France
| | - Bertrand Carboni
- Institut des Sciences Chimiques de Rennes; UMR CNRS 6226; Université de Rennes 1; 263, Avenue du Général Leclerc, Campus de Beaulieu 35042 Rennes CEDEX France
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8
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Pichette Drapeau M, Gooßen LJ. Carboxylic Acids as Directing Groups for C-H Bond Functionalization. Chemistry 2016; 22:18654-18677. [PMID: 27730686 DOI: 10.1002/chem.201603263] [Citation(s) in RCA: 230] [Impact Index Per Article: 28.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2016] [Indexed: 12/29/2022]
Abstract
The selective transformation of C-H bonds is one of the most desirable approaches to creating complexity from simple building blocks. Several directing groups are efficient in controlling the regioselectivity of catalytic C-H bond functionalizations. Among them, carboxylic acids are particularly advantageous, since they are widely available in great structural diversity and at low cost. The carboxylate directing groups can be tracelessly cleaved or may serve as the anchor point for further functionalization through decarboxylative couplings. This Minireview summarizes the substantial progress made in the last few years in the development of reactions in which carboxylate groups direct C-H bond functionalizations with formation of C-C, C-O, C-N, or C-halogen bonds at specific positions. It is divided into sections on C-C, C-O, C-N, and C-halogen bond formation, each of which is subdivided by reactions and product classes. Particular emphasis is placed on methods that enable multiple derivatizations by combining carboxylate-directed C-H functionalization with decarboxylative couplings.
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Affiliation(s)
- Martin Pichette Drapeau
- Ruhr-Universität Bochum, Lehrstuhl für Organische Chemie I, ZEMOS, Universitätsstr. 150, 44801, Bochum, Germany
| | - Lukas J Gooßen
- Ruhr-Universität Bochum, Lehrstuhl für Organische Chemie I, ZEMOS, Universitätsstr. 150, 44801, Bochum, Germany
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Luan Y, Barbato KS, Moquist PN, Kodama T, Schaus SE. Enantioselective synthesis of 1,2-dihydronaphthalene-1-carbaldehydes by addition of boronates to isochromene acetals catalyzed by tartaric acid. J Am Chem Soc 2015; 137:3233-6. [PMID: 25715172 PMCID: PMC4666678 DOI: 10.1021/jacs.5b00757] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Tartaric acid is an ideal asymmetric catalyst as it is abundant, cheap, and environmentally friendly. (+)-Tartaric acid was found to catalyze a novel enantioselective [4 + 2] cycloaddition of isochromene acetals and vinylboronates. A variety of substituted isochromene acetals were tolerated, furnishing the desired dihydronaphthalenes and dihydrobenzofluorene products in good yields. High enantiomeric ratios (up to 98.5:1.5) and excellent diastereoselectivities (all >99:1) were observed employing 10 mol % of (+)-tartaric acid as the catalyst, in combination with 5 mol % of Ho(OTf)3.
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Affiliation(s)
- Yi Luan
- Department of Chemistry, Boston University, 24 Cummington Street, Boston, Massachusetts 02215, United States
| | - Keith S. Barbato
- Department of Chemistry, Boston University, 24 Cummington Street, Boston, Massachusetts 02215, United States
| | - Philip N. Moquist
- Department of Chemistry, Boston University, 24 Cummington Street, Boston, Massachusetts 02215, United States
| | - Tomohiro Kodama
- Department of Chemistry, Boston University, 24 Cummington Street, Boston, Massachusetts 02215, United States
| | - Scott E. Schaus
- Department of Chemistry, Boston University, 24 Cummington Street, Boston, Massachusetts 02215, United States
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Engle KM, Yu JQ. Developing ligands for palladium(II)-catalyzed C-H functionalization: intimate dialogue between ligand and substrate. J Org Chem 2013; 78:8927-55. [PMID: 23565982 PMCID: PMC3779523 DOI: 10.1021/jo400159y] [Citation(s) in RCA: 430] [Impact Index Per Article: 39.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Homogeneous transition-metal-catalyzed reactions are indispensable to all facets of modern chemical synthesis. It is thus difficult to imagine that for much of the early 20th century, the reactivity and selectivity of all known homogeneous metal catalysts paled in comparison to their heterogeneous and biological counterparts. In the intervening decades, advances in ligand design bridged this divide, such that today some of the most demanding bond-forming events are mediated by ligand-supported homogeneous metal species. While ligand design has propelled many areas of homogeneous catalysis, in the field of Pd(II)-catalyzed C-H functionalization, suitable ligand scaffolds are lacking, which has hampered the development of broadly practical transformations based on C-H functionalization logic. In this Perspective, we offer an account of our research employing three ligand scaffolds, mono-N-protected amino acids, 2,6-disubstituted pyridines, and 2,2'-bipyridines, to address challenges posed by several synthetically versatile substrate classes. Drawing on this work, we discuss principles of ligand design, such as the need to match a ligand to a particular substrate class, and how ligand traits such as tunability and modularity can be advantageous in reaction discovery.
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Affiliation(s)
- Keary M. Engle
- Department of Chemistry, The Scripps Research Institute, 10550 N. Torrey Pines Rd., La Jolla, CA 92037
| | - Jin-Quan Yu
- Department of Chemistry, The Scripps Research Institute, 10550 N. Torrey Pines Rd., La Jolla, CA 92037
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Gallardo-Donaire J, Martin R. Cu-catalyzed mild C(sp2)-H functionalization assisted by carboxylic acids en route to hydroxylated arenes. J Am Chem Soc 2013; 135:9350-3. [PMID: 23758209 DOI: 10.1021/ja4047894] [Citation(s) in RCA: 149] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
A formal Cu-catalyzed C(sp(2))-H hydroxylation assisted by benzoic acids is described. The procedure is characterized by its mild reaction conditions and wide substrate scope utilizing simple and cheap Cu catalysts, thus becoming a user-friendly and operationally simple protocol for C(sp(2))-H hydroxylation.
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Affiliation(s)
- Joan Gallardo-Donaire
- Institute of Chemical Research of Catalonia (ICIQ), Av. Països Catalans 16, 43007, Tarragona, Spain
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12
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Rosen BR, Simke LR, Thuy-Boun PS, Dixon DD, Yu JQ, Baran PS. CH Functionalization Logic Enables Synthesis of (+)-Hongoquercin A and Related Compounds. Angew Chem Int Ed Engl 2013; 52:7317-20. [DOI: 10.1002/anie.201303838] [Citation(s) in RCA: 151] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2013] [Indexed: 11/12/2022]
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13
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Rosen BR, Simke LR, Thuy-Boun PS, Dixon DD, Yu JQ, Baran PS. CH Functionalization Logic Enables Synthesis of (+)-Hongoquercin A and Related Compounds. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201303838] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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14
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Recent advances in application of intramolecular Suzuki cross-coupling in cyclization and heterocyclization. MONATSHEFTE FUR CHEMIE 2012. [DOI: 10.1007/s00706-012-0746-0] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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15
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Suzuki-Miyaura Cross-Coupling Reactions in a Solkane365/227/Ethanol Blend at Ambient Temperature. European J Org Chem 2012. [DOI: 10.1002/ejoc.201101783] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Herzon SB, Woo CM. The diazofluorene antitumor antibiotics: Structural elucidation, biosynthetic, synthetic, and chemical biological studies. Nat Prod Rep 2012; 29:87-118. [DOI: 10.1039/c1np00052g] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Kharel MK, Pahari P, Shepherd MD, Tibrewal N, Nybo SE, Shaaban KA, Rohr J. Angucyclines: Biosynthesis, mode-of-action, new natural products, and synthesis. Nat Prod Rep 2011; 29:264-325. [PMID: 22186970 DOI: 10.1039/c1np00068c] [Citation(s) in RCA: 250] [Impact Index Per Article: 19.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Covering: 1997 to 2010. The angucycline group is the largest group of type II PKS-engineered natural products, rich in biological activities and chemical scaffolds. This stimulated synthetic creativity and biosynthetic inquisitiveness. The synthetic studies used five different strategies, involving Diels-Alder reactions, nucleophilic additions, electrophilic additions, transition-metal mediated cross-couplings and intramolecular cyclizations to generate the angucycline frames. Biosynthetic studies were particularly intriguing when unusual framework rearrangements by post-PKS tailoring oxidoreductases occurred, or when unusual glycosylation reactions were involved in decorating the benz[a]anthracene-derived cores. This review follows our previous reviews, which were published in 1992 and 1997, and covers new angucycline group antibiotics published between 1997 and 2010. However, in contrast to the previous reviews, the main focus of this article is on new synthetic approaches and biosynthetic investigations, most of which were published between 1997 and 2010, but go beyond, e.g. for some biosyntheses all the way back to the 1980s, to provide the necessary context of information.
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Affiliation(s)
- Madan K Kharel
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, 789 S. Limestone Street, Lexington, Kentucky 40536-0596, USA
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Scully SS, Porco JA. Asymmetric Total Synthesis of the Epoxykinamycin FL-120 B′. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201104504] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Scully SS, Porco JA. Asymmetric total synthesis of the epoxykinamycin FL-120 B'. Angew Chem Int Ed Engl 2011; 50:9722-6. [PMID: 21953671 DOI: 10.1002/anie.201104504] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2011] [Indexed: 11/07/2022]
Affiliation(s)
- Stephen S Scully
- Department of Chemistry and Center for Chemical Methodology and Library Development, Boston University, 590 Commonwealth Avenue, Boston, MA 02215, USA
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