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Kerr WR, Squire MA, Fitchett CM. Synthesis and structural isomerism of sterically hindered isobornyl amide tethered N-heterocyclic carbene complexes. J Organomet Chem 2022. [DOI: 10.1016/j.jorganchem.2022.122519] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Argade MD, Straub CJ, Rusali LE, Santarsiero BD, Riley AP. Synthesis of Aristoquinoline Enantiomers and Their Evaluation at the α3β4 Nicotinic Acetylcholine Receptor. Org Lett 2021; 23:7693-7697. [PMID: 34292752 PMCID: PMC9999383 DOI: 10.1021/acs.orglett.1c02057] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The first synthesis of aristoquinoline (1), a naturally occurring nicotinic acetylcholine receptor (nAChR) antagonist, was accomplished using two different approaches. Comparison of the synthetic material's spectroscopic data to that of the isolated alkaloid identified a previously misassigned stereogenic center. An evaluation of each enantiomer's activity at the α3β4 nAChR revealed that (+)-1 is significantly more potent than (-)-1. This unexpected finding suggests that naturally occurring 1 possesses the opposite absolute configuration from indole-containing Aristotelia alkaloids.
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Affiliation(s)
- Malaika D Argade
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Illinois at Chicago, Chicago, Illinois 60612, United States
| | - Carolyn J Straub
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Illinois at Chicago, Chicago, Illinois 60612, United States
| | - Lisa E Rusali
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Illinois at Chicago, Chicago, Illinois 60612, United States
| | - Bernard D Santarsiero
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Illinois at Chicago, Chicago, Illinois 60612, United States
| | - Andrew P Riley
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Illinois at Chicago, Chicago, Illinois 60612, United States
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Ismiyev AI, Dotsenko VV, Aksenov NA, Aksenova IV, Magarramov AM. Pseudo-Five-Component Stereoselective Synthesis of Highly Functionalized 3-Azabicyclo[3.3.1]nona-2,7-dienes. RUSS J GEN CHEM+ 2021. [DOI: 10.1134/s1070363221050029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Chen ME, Chen XW, Hu YH, Ye R, Lv JW, Li B, Zhang FM. Recent advances of Ritter reaction and its synthetic applications. Org Chem Front 2021. [DOI: 10.1039/d1qo00496d] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
This review provides a comprehensive survey of Ritter reactions from 2014 to 2020.
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Affiliation(s)
- Meng-En Chen
- State Key Laboratory of Applied Organic Chemistry & College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Xiao-Wei Chen
- State Key Laboratory of Applied Organic Chemistry & College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Yue-Hong Hu
- State Key Laboratory of Applied Organic Chemistry & College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Rui Ye
- State Key Laboratory of Applied Organic Chemistry & College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Jian-Wei Lv
- State Key Laboratory of Applied Organic Chemistry & College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Baosheng Li
- School of Chemistry and Chemical Engineering
- Chongqing University
- Chongqing
- P. R. China
| | - Fu-Min Zhang
- State Key Laboratory of Applied Organic Chemistry & College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
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Xu X, Roseblade A, Rawling T, Ung AT. Antiproliferative activities of tricyclic amides derived from β-caryophyllene via the Ritter reaction against MDA-MB-231 breast cancer cells. RSC Med Chem 2020; 11:118-124. [PMID: 33479611 DOI: 10.1039/c9md00237e] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2019] [Accepted: 11/09/2019] [Indexed: 11/21/2022] Open
Abstract
A library of novel tricyclic amides has been synthesised via the Ritter reaction from β-caryophyllene 1 and its monoepoxy derivative 4. The compounds were assessed for antiproliferative activities against the aggressive MDA-MB-231 breast cancer cell line. Of the synthesised compounds, eight were active. 3c and 6b were the most potent and inhibited proliferation with IC50 of 9.7 and 8.2 μM, respectively. Mechanistic studies revealed differences in their antiproliferative actions. 6b inhibited cell cycle progression and induced predominantly apoptotic cell death. In contrast, 3c did not affect cell cycle kinetics and favoured necrotic over apoptotic pathways. Screening against mammalian cells (VERO cells) indicates that 3c and 6b were more active towards MDA-MB-231 cells than noncancerous cells. Facile synthesis and biological results suggest that these caryophyllene derived amides are viable lead compounds for further development.
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Affiliation(s)
- XiXi Xu
- School of Mathematical and Physical Sciences , Faculty of Science , University of Technology Sydney , Broadway , NSW 2007 , Australia . ; Tel: +61 2 9514 1881
| | - Ariane Roseblade
- School of Mathematical and Physical Sciences , Faculty of Science , University of Technology Sydney , Broadway , NSW 2007 , Australia . ; Tel: +61 2 9514 1881
| | - Tristan Rawling
- School of Mathematical and Physical Sciences , Faculty of Science , University of Technology Sydney , Broadway , NSW 2007 , Australia . ; Tel: +61 2 9514 1881
| | - Alison T Ung
- School of Mathematical and Physical Sciences , Faculty of Science , University of Technology Sydney , Broadway , NSW 2007 , Australia . ; Tel: +61 2 9514 1881
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Bolsakova J, Jirgensons A. The Ritter reaction for the synthesis of heterocycles. Chem Heterocycl Compd (N Y) 2018. [DOI: 10.1007/s10593-018-2189-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Xu X, Rawling T, Roseblade A, Bishop R, Ung AT. Antiproliferative activities of alkaloid-like compounds. MEDCHEMCOMM 2017; 8:2105-2114. [PMID: 30108728 PMCID: PMC6072216 DOI: 10.1039/c7md00435d] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/25/2017] [Accepted: 10/20/2017] [Indexed: 02/01/2023]
Abstract
Tricyclic alkaloid-like compounds were synthesised in a few steps, via the bridging Ritter reaction.
Tricyclic alkaloid-like compounds were synthesised in a few steps, via the bridging Ritter reaction. The compounds were evaluated for their antiproliferative activity against the MCF-7 and the aggressive MDA-MB-231 breast cancer cells. The anti-cancer activities of 2c were found to be selective towards the aggressive and more challenging to treat triple negative (MDA-MB-231) cell line while exhibiting no antiproliferative activities towards the MCF-7 cells at the highest concentration tested (50 μM). The IC50 of compound 2c was determined to be 7.9 μM for the MDA-MB-231 cell line. Furthermore, 2c arrested cell cycle at the G2/M phase and induced apoptosis in a dose-dependent manner. Besides in-house anti-cancer screening, compound 3 was selected for anti-cancer screening by the National Cancer Institute and was found to have broad anti-cancer activity with selectivity against particular leukaemia, colon, melanoma, and breast cancer cell lines. Cytotoxicities of compounds 2c and 3 were also tested against noncancerous mammalian cells (VERO cell line), and found to be selective towards cancerous cells. The facile synthetic route, unique chemical structures and the biological data make these alkaloid-like compounds worthwhile lead compounds for further anti-cancer drug development.
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Affiliation(s)
- XiXi Xu
- School of Mathematical and Physical Sciences , University of Technology Sydney , Broadway , NSW 2007 , Australia . ; Tel: +61 2 9514 1881
| | - Tristan Rawling
- School of Mathematical and Physical Sciences , University of Technology Sydney , Broadway , NSW 2007 , Australia . ; Tel: +61 2 9514 1881
| | - Ariane Roseblade
- Discipline of Pharmacy , Graduate School of Health , University of Technology Sydney , Broadway , NSW 2007 , Australia
| | - Roger Bishop
- School of Chemistry , University of New South Wales, UNSW , Sydney , NSW 2052 , Australia
| | - Alison T Ung
- School of Mathematical and Physical Sciences , University of Technology Sydney , Broadway , NSW 2007 , Australia . ; Tel: +61 2 9514 1881
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Williams SG, Bhadbhade M, Bishop R, Ung AT. An alkaloid-like 3-azabicyclo[3.3.1]non-3-ene library obtained from the bridged Ritter reaction. Tetrahedron 2017. [DOI: 10.1016/j.tet.2016.11.057] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Williams SG, Bhadbhade M, Bishop R, Ung AT. Synthesis and Crystal Structure of Unexpected (1S,4R,5R,6S)-4-Cyano-2,2,6-trimethyl-3-azabicyclo[3.3.1]nonan-6-yl Acetate. Aust J Chem 2017. [DOI: 10.1071/ch17270] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The reaction of (–)-β-pinene with KCN under a mild bridged Ritter reaction gave (1S,5R,6S)-2,2,6-trimethyl-3-aza-bicyclo[3.3.1]non-3-en-6-yl acetate that subsequently reacted to provide an unexpected (1S,4R,5R,6S)-4-cyano-2,2,6-trimethyl-3-azabicyclo[3.3.1]nonane-6-yl acetate. The structure of the compound was determined by high-resolution mass spectrometry, and IR and NMR spectroscopy and confirmed by single crystal X-ray crystallography. The compound crystallises in the monoclinic P21 space group, with unit cell parameters a 8.6120 (17), b 7.4570 (15), c 11.189 (2) Å, and β 110.16 (3)°.
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Ung AT, West AN, Phillips MJA, Williams SG. Synthesis of alkaloid-like compounds via the bridging Ritter reactions II. MONATSHEFTE FUR CHEMIE 2016. [DOI: 10.1007/s00706-016-1817-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Posevins D, Suta K, Turks M. Indium-Triflate-Catalyzed Ritter Reaction in Liquid Sulfur Dioxide. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600013] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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Stepanovs D, Posevins D, Turks M. Crystal structures of two (±)-exo-N-isobornyl-acetamides. ACTA CRYSTALLOGRAPHICA SECTION E-CRYSTALLOGRAPHIC COMMUNICATIONS 2015; 71:1117-20. [PMID: 26594386 PMCID: PMC4647407 DOI: 10.1107/s2056989015015984] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/12/2015] [Accepted: 08/26/2015] [Indexed: 11/12/2022]
Abstract
The title compounds consist of a 1,7,7-trimethylbicyclo[2.2.1]heptane (bornane or camphane) skeleton which is decorated with acetamide for (±)-(1) and chloroacetamide for (±)-(2), functionalities. In the crystals of both compounds, molecules are linked via N—H⋯O hydrogen bonds, reinforced by C—H⋯O contacts, forming chains propagating along the a axis. The title compounds consist of a bornane skeleton with attached acetamide, C12H21NO (±)-(1) {systematic name: (±)-N-[(1RS,2RS,4RS)-1,7,7-trimethylbicyclo[2.2.1]heptan-2-yl]acetamide}, and chloroacetamide, C12H20ClNO (±)-(2) {systematic name: (±)-2-chloro-N-[(1RS,2RS,4RS)-1,7,7-trimethylbicyclo[2.2.1]heptan-2-yl]acetamide}, functionalities to the 2-exo-position. The crystal structure of the first monoclinic polymorph of (±)-(1) has been reported previously [Ung et al. (2014 ▸). Monatsh. Chem.145, 983–992]. Compound (±)-(1) crystallizes in the space group P21/n with two independent molecules in the asymmetric unit, in contrast to the above-mentioned polymorph which crystallized in the space group C2/c with one molecule in the asymmetric unit. In the title compounds, the bicyclic bornane moieties have normal geometries. In the crystals of both compounds, molecules are linked by N—H⋯O hydrogen bonds, reinforced by C—H⋯O contacts, forming trans-amide chains propagating along the a-axis direction. In the case of compound (±)-(1), neighbouring chains are linked by further C—H⋯O contacts, forming double-chain ribbons along [100].
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Affiliation(s)
- Dmitrijs Stepanovs
- Latvian Institute of Organic Synthesis, Aizkraukles 21, Riga, LV-1006, Latvia ; Institute of Technology of Organic Chemistry, Faculty of Materials Science and Applied Chemistry, Riga Technical University, P. Valdena 3/7, Riga, LV-1048, Latvia
| | - Daniels Posevins
- Institute of Technology of Organic Chemistry, Faculty of Materials Science and Applied Chemistry, Riga Technical University, P. Valdena 3/7, Riga, LV-1048, Latvia
| | - Maris Turks
- Institute of Technology of Organic Chemistry, Faculty of Materials Science and Applied Chemistry, Riga Technical University, P. Valdena 3/7, Riga, LV-1048, Latvia
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