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Nicastri KA, Gerstner NC, Schomaker JM. Progress toward the Total Synthesis of Jogyamycin Using a Tandem Ichikawa/Winstein Rearrangement. Org Lett 2023; 25:8279-8283. [PMID: 37997640 PMCID: PMC10789149 DOI: 10.1021/acs.orglett.3c03286] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2023]
Abstract
Jogyamycin is a densely functionalized aminocyclopentitol that displays potent antiprotozoal activity. Herein, we report a route toward this natural product that utilizes an unprecedented transformation involving a tandem Ichikawa-Winstein rearrangement to install the C-1/C-2 diamine core. Attempts to further functionalize the C-3/C-4 alkene en route to jogyamycin are also discussed.
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Affiliation(s)
- Kate A Nicastri
- Department of Chemistry, University of Wisconsin, 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Nels C Gerstner
- Department of Chemistry, University of Wisconsin, 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Jennifer M Schomaker
- Department of Chemistry, University of Wisconsin, 1101 University Avenue, Madison, Wisconsin 53706, United States
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2
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Dou X, Patel BA, D'Amico T, Subramanian C, Cousineau E, Yi Y, Cohen M, Blagg BSJ. Synthesis and Evaluation of Simplified Cruentaren A Analogues. J Org Chem 2022; 87:9940-9956. [PMID: 35894845 DOI: 10.1021/acs.joc.2c00948] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The 90 kDa heat shock protein (Hsp90) belongs to a group of molecular chaperones that regulate homeostasis via the folding of nascent polypeptides into their biologically active proteins, many of which are involved in cancer development and progression. As a result, inhibition of Hsp90 is an exciting area of research for the treatment of cancer. However, most of the 18 Hsp90 N-terminal inhibitors evaluated in clinical trials exhibited deleterious side effects and toxicities. Cruentaren A is a natural product that manifests potent anticancer activity against various human cancer cell lines via disruption of interactions between Hsp90α and F1FO ATP synthase, which does not induce the pro-survival, heat shock response, a major limitation associated with current Hsp90 inhibitors. However, the development of cruentaren A as a new anticancer agent has been hindered by its complex structure. Herein, we systematically removed the functionalities present in fragment 2 of cruentaren A and incorporated some key structural modifications from previous work, which produced 12 simplified analogues. Our studies determined that all functional groups present in fragment 2 are essential for cruentaren A's anticancer activity.
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Affiliation(s)
- Xiaozheng Dou
- Department of Chemistry and Biochemistry, The University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Bhargav A Patel
- Department of Chemistry and Biochemistry, The University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Terin D'Amico
- Department of Chemistry and Biochemistry, The University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Chitra Subramanian
- General Surgery Clinic, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Eric Cousineau
- General Surgery Clinic, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Yi Yi
- Global Blood Therapeutics, San Francisco, California 94080, United States
| | - Mark Cohen
- General Surgery Clinic, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Brian S J Blagg
- Department of Chemistry and Biochemistry, The University of Notre Dame, Notre Dame, Indiana 46556, United States
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3
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Ikonnikova VA, Baranov MS, Mikhaylov AA. Developments in the Synthesis of Hasubanan Alkaloids. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200675] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Viktoria A. Ikonnikova
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry Russian Academy of Sciences: FBGUN Institut bioorganiceskoj himii im akademikov M M Semakina i U A Ovcinnikova Rossijskoj akademii nauk Group of chemistry of natural products RUSSIAN FEDERATION
| | - Mikhail S. Baranov
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry Russian Academy of Sciences: FBGUN Institut bioorganiceskoj himii im akademikov M M Semakina i U A Ovcinnikova Rossijskoj akademii nauk Group of chemistry of heterocyclic compounds RUSSIAN FEDERATION
| | - Andrey A. Mikhaylov
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry RAS Laboratory of Bioinformatic Methods of Combinatorial Chemistry and Biology Ulitsa Miklukho-Maklaya, 16/10 117997 Moscow RUSSIAN FEDERATION
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4
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Çetinkaya Y, Maraş A, Göksu S. Insight into the intramolecular interactions of trans-2-azidocycloalk-3-en-1-ols and trans-2-azidocycloalk-3-en-1-yl acetates: A theoretical study. Tetrahedron 2021. [DOI: 10.1016/j.tet.2021.132272] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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5
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Alexander JR, Kevorkian PV, Topczewski JJ. Intercepting the Banert cascade with nucleophilic fluorine: direct access to α-fluorinated NH-1,2,3-triazoles. Chem Commun (Camb) 2021; 57:5024-5027. [PMID: 33890592 DOI: 10.1039/d1cc01179k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The treatment of propargylic azides with silver(i) fluoride in acetonitrile was found to yield α-fluorinated NH-1,2,3-triazoles via the Banert cascade. The reaction was regioselective and the products result from an initial [3,3] rearrangement. The reaction is demonstrated on >15 examples with yields ranging from 37% to 86%.
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Affiliation(s)
- J R Alexander
- Department of Chemistry, University of Minnesota Twin Cities, Minneapolis, Minnesota 55455, USA.
| | - P V Kevorkian
- Department of Chemistry, University of Minnesota Twin Cities, Minneapolis, Minnesota 55455, USA.
| | - J J Topczewski
- Department of Chemistry, University of Minnesota Twin Cities, Minneapolis, Minnesota 55455, USA.
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6
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Liu EC, Topczewski JJ. Enantioselective Nickel-Catalyzed Alkyne-Azide Cycloaddition by Dynamic Kinetic Resolution. J Am Chem Soc 2021; 143:5308-5313. [PMID: 33798335 PMCID: PMC8130861 DOI: 10.1021/jacs.1c01354] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The triazole heterocycle has been widely adopted as an isostere for the amide bond. Many native amides are α-chiral, being derived from amino acids. This makes α-N-chiral triazoles attractive building blocks. This report describes the first enantioselective triazole synthesis that proceeds via nickel-catalyzed alkyne-azide cycloaddition (NiAAC). This dynamic kinetic resolution is enabled by a spontaneous [3,3]-sigmatropic rearrangement of the allylic azide. The 1,4,5-trisubstituted triazole products, derived from internal alkynes, are complementary to those commonly obtained by the related CuAAC reaction. Initial mechanistic experiments indicate that the NiAAC reaction proceeds through a monometallic Ni complex, which is distinct from the CuAAC manifold.
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Affiliation(s)
- En-Chih Liu
- Department of Chemistry, University of Minnesota Twin Cities, Minneapolis, Minnesota 55455, United States
| | - Joseph J Topczewski
- Department of Chemistry, University of Minnesota Twin Cities, Minneapolis, Minnesota 55455, United States
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7
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Carlson AS, Petre AM, Topczewski JJ. A cascade reaction of cinnamyl azides with vinyl sulfones directly generates dihydro-pyrrolo-pyrazole heterocycles. Tetrahedron Lett 2021; 67. [PMID: 34054152 DOI: 10.1016/j.tetlet.2021.152860] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
This report describes the direct synthesis of dihydro-pyrrolo-pyrazole heterocycles from allylic azides and methyl vinyl sulfone. The product results from a complex cascade reaction that is operationally straightforward, with aromatization being the result of a concomitant elimination step. A variety of azides could participate in this reaction (12 examples) and the isolated yields of the desired product ranged from 51%-72%. Lastly the ethylene sulfone group could be removed by heating the product in pyrrolidine.
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Affiliation(s)
- Angela S Carlson
- Department of Chemistry, University of Minnesota Twin Cities, Minneapolis, MN 55455, United States
| | - Alexandru M Petre
- Department of Chemistry, University of Minnesota Twin Cities, Minneapolis, MN 55455, United States
| | - Joseph J Topczewski
- Department of Chemistry, University of Minnesota Twin Cities, Minneapolis, MN 55455, United States
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8
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Tjeng AA, Handore KL, Batey RA. Stereocontrolled Microwave-Assisted Domino [3,3]-Sigmatropic Reactions: A Winstein-Overman Rearrangement for the Formation of Differentiated Contiguous C-N Bonds. Org Lett 2020; 22:3050-3055. [PMID: 32223252 DOI: 10.1021/acs.orglett.0c00801] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
A domino [3,3]-sigmatropic rearrangement sequence employing a sequential reversible allylic azide rearrangement followed by an irreversible Overman reaction provides a new route to the formation of two contiguous C-N bonds. The reaction occurs in a stereocontrolled fashion in two steps from readily available alkenyl epoxides via initial azide anion ring opening of the epoxides.
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Affiliation(s)
- Andy A Tjeng
- Davenport Research Laboratories, Dept. of Chemistry, University of Toronto, 80 St. George St., Toronto, ON, M5S 3H6, Canada
| | - Kishor L Handore
- Davenport Research Laboratories, Dept. of Chemistry, University of Toronto, 80 St. George St., Toronto, ON, M5S 3H6, Canada
| | - Robert A Batey
- Davenport Research Laboratories, Dept. of Chemistry, University of Toronto, 80 St. George St., Toronto, ON, M5S 3H6, Canada
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9
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Alexander JR, Packard MH, Hildebrandt AM, Ott AA, Topczewski JJ. Divergent Mechanisms of the Banert Cascade with Propargyl Azides. J Org Chem 2020; 85:3174-3181. [PMID: 31944764 DOI: 10.1021/acs.joc.9b03061] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Triazoles are privileged heterocycles for a variety of applications. The synthesis of 1H-triazoles can be accomplished by the Banert cascade from propargylic azides. Depending on the substrate and conditions, the Banert cascade can proceed by either a sigmatropic or prototropic mechanism. This report describes the first detailed kinetic analysis of the Banert cascade proceeding by both pathways including substituent effects and KIE. The analysis identified the inflection point in the divergent pathways, allowing future work to predict which Banert products are accessible.
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Affiliation(s)
- Juliana R Alexander
- Department of Chemistry, University of Minnesota Twin Cities, Minneapolis, Minnesota 55455, United States
| | - Mary H Packard
- Department of Chemistry, University of Minnesota Twin Cities, Minneapolis, Minnesota 55455, United States
| | - Alanna M Hildebrandt
- Department of Chemistry, University of Minnesota Twin Cities, Minneapolis, Minnesota 55455, United States
| | - Amy A Ott
- Department of Chemistry, University of Minnesota Twin Cities, Minneapolis, Minnesota 55455, United States
| | - Joseph J Topczewski
- Department of Chemistry, University of Minnesota Twin Cities, Minneapolis, Minnesota 55455, United States
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Vallejos MM, Labadie GR. Insight into the factors controlling the equilibrium of allylic azides. RSC Adv 2020; 10:4404-4413. [PMID: 35495248 PMCID: PMC9049130 DOI: 10.1039/c9ra10093h] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Accepted: 12/26/2019] [Indexed: 12/19/2022] Open
Abstract
Several allylic azides with different double bond substitutions were studied to understand the factors, governing their equilibrium using density functional theory along with the quantum theory of atoms in molecules, non-covalent interactions and natural bond orbital approaches. The results showed that the hydroxyl group or heteroatoms in allylic azides interact with the molecule through an electrostatic weak interaction in each pair of regioisomers. The equilibrium shifts of substituted allylic azides, compared to non-substituted allylic azides, were not attributed to the presence of specific interactions, such as hydrogen bonds. The observed equilibrium shifts stemmed mainly from the strengthening and weakening of negative hyperconjugative interactions, which were affected by the weak interaction involving the proximal substituent in each regioisomer. A good linear correlation was obtained between the hyperconjugative energies of πC
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C→σ*Zb interactions and the calculated percentages of the secondary azide and tertiary azide in the equilibrium mixture. Also, the effect of the aromatic ring substituent was analysed using such approaches. This study not only provides insights into the factors controlling the stabilities of the substituted allylic azides, but also settles the basis to predict the regioisomer predominance in the equilibrium mixture. The factors controlling the allyl azides equilibrium has been studied by different theoretical approaches setting the basis to predict the regioisomers predominance in the equilibrium mixture.![]()
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Affiliation(s)
- Margarita M Vallejos
- Laboratorio de Química Orgánica, IQUIBA-NEA, Universidad Nacional del Nordeste, CONICET, FACENA Av. Libertad 5460 Corrientes 3400 Argentina +54-379-4457996 ext. 104
| | - Guillermo R Labadie
- Instituto de Química Rosario, UNR, CONICET Suipacha 531 S2002LRK Rosario Argentina.,Departamento de Química Orgánica, Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario Suipacha 531 S2002LRK Rosario Argentina
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