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Klepp J, Bousfield T, Cummins H, Legendre SVAM, Camp JE, Greatrex BW. Oxa-Michael-initiated cascade reactions of levoglucosenone. Beilstein J Org Chem 2022; 18:1457-1462. [PMID: 36300013 PMCID: PMC9577383 DOI: 10.3762/bjoc.18.151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2022] [Accepted: 09/30/2022] [Indexed: 11/23/2022] Open
Abstract
The reactions of aromatic aldehydes and levoglucosenone promoted by methoxide gives bridged α,β-unsaturated ketones, formed by a series of oxa-Michael-initiated cascade reactions in yields of up to 91% (14 examples). A complex series of equilibria operate during the reaction, and the formation of the bridged species is thermodynamically favored, except in the case of 5-methylfurfural and pyrrole-2-carboxaldehyde. This is the first report detailing this type of aldol/Michael cascade involving oxa-Michael initiation.
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Affiliation(s)
- Julian Klepp
- School of Rural Medicine, University of New England, Armidale, NSW, 2351, Australia
| | - Thomas Bousfield
- Department of Chemical Sciences, School of Applied Sciences, University of Huddersfield, Queensgate, Huddersfield, United Kingdom
| | - Hugh Cummins
- School of Rural Medicine, University of New England, Armidale, NSW, 2351, Australia
| | - Sarah V A-M Legendre
- School of Rural Medicine, University of New England, Armidale, NSW, 2351, Australia
| | - Jason E Camp
- Department of Chemical Sciences, School of Applied Sciences, University of Huddersfield, Queensgate, Huddersfield, United Kingdom
| | - Ben W Greatrex
- School of Rural Medicine, University of New England, Armidale, NSW, 2351, Australia
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2
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Bemis CY, Ungarean CN, Shved AS, Jamieson CS, Hwang T, Lee KS, Houk KN, Sarlah D. Total Synthesis and Computational Investigations of Sesquiterpene-Tropolones Ameliorate Stereochemical Inconsistencies and Resolve an Ambiguous Biosynthetic Relationship. J Am Chem Soc 2021; 143:6006-6017. [DOI: 10.1021/jacs.1c02150] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Christopher Y. Bemis
- Roger Adams Laboratory, Department of Chemistry, University of Illinois, Urbana, Illinois 61801, United States
- Cancer Center at Illinois, University of Illinois, Urbana, Illinois 61801, United States
| | - Chad N. Ungarean
- Roger Adams Laboratory, Department of Chemistry, University of Illinois, Urbana, Illinois 61801, United States
- Cancer Center at Illinois, University of Illinois, Urbana, Illinois 61801, United States
| | - Alexander S. Shved
- Roger Adams Laboratory, Department of Chemistry, University of Illinois, Urbana, Illinois 61801, United States
- Cancer Center at Illinois, University of Illinois, Urbana, Illinois 61801, United States
| | - Cooper S. Jamieson
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095, United States
| | - Taehwan Hwang
- Roger Adams Laboratory, Department of Chemistry, University of Illinois, Urbana, Illinois 61801, United States
- Cancer Center at Illinois, University of Illinois, Urbana, Illinois 61801, United States
| | - Ken S. Lee
- Roger Adams Laboratory, Department of Chemistry, University of Illinois, Urbana, Illinois 61801, United States
- Cancer Center at Illinois, University of Illinois, Urbana, Illinois 61801, United States
| | - K. N. Houk
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095, United States
| | - David Sarlah
- Roger Adams Laboratory, Department of Chemistry, University of Illinois, Urbana, Illinois 61801, United States
- Cancer Center at Illinois, University of Illinois, Urbana, Illinois 61801, United States
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3
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Shao J, Li Z, Wang Y, Xiong Y, Hu X. Synthesis and Bioactivity of Tropone Derivatives as Potential Compounds against Human Gastric Cancer Cells Growth. CHINESE J ORG CHEM 2021. [DOI: 10.6023/cjoc202105014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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4
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Li Y, Sun M, Gao W. Synthesis and characterization of bromo-, arylazo-, and heterocyclic-fused troponoids containing a 1,3-benzodioxole system. J Heterocycl Chem 2011. [DOI: 10.1002/jhet.702] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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5
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Parajón-Costa BS, Baran EJ, Romero J, Sáez-Puche R, Arrambide G, Gambino D. Synthesis and characterization of bistropolonato oxovanadium(IV and V) complexes. J COORD CHEM 2010. [DOI: 10.1080/00958972.2010.531131] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Beatriz S. Parajón-Costa
- a Centro de Química Inorgánica (CEQUINOR/CONICET,UNLP), Facultad de Ciencias Exactas , Universidad Nacional de La Plata , C. Correo 962, 1900-La Plata , Argentina
| | - Enrique J. Baran
- a Centro de Química Inorgánica (CEQUINOR/CONICET,UNLP), Facultad de Ciencias Exactas , Universidad Nacional de La Plata , C. Correo 962, 1900-La Plata , Argentina
| | - Julio Romero
- b Departamento de Química Inorgánica, Facultad de Ciencias Químicas , Universidad Complutense de Madrid , E-28040 Madrid , Spain
| | - Regino Sáez-Puche
- b Departamento de Química Inorgánica, Facultad de Ciencias Químicas , Universidad Complutense de Madrid , E-28040 Madrid , Spain
| | - Gabriel Arrambide
- c Departamento “Estrella Campos”, Cátedra de Química Inorgánica, Facultad de Química , Universidad de la República , Montevideo , Uruguay
| | - Dinorah Gambino
- c Departamento “Estrella Campos”, Cátedra de Química Inorgánica, Facultad de Química , Universidad de la República , Montevideo , Uruguay
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Leonard NM, Oswald MC, Freiberg DA, Nattier BA, Smith RC, Mohan RS. A simple and versatile method for the synthesis of acetals from aldehydes and ketones using bismuth triflate. J Org Chem 2002; 67:5202-7. [PMID: 12126407 DOI: 10.1021/jo0258249] [Citation(s) in RCA: 136] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Acetals are obtained in good yields by treatment of aldehydes and ketones with trialkyl orthoformate and the corresponding alcohol in the presence of 0.1 mol % Bi(OTf)3.4H2O. A simple procedure for the formation of acetals of diaryl ketones has also been developed. The conversion of carbonyl compounds to the corresponding 1,3-dioxolane using ethylene glycol is also catalyzed by Bi(OTf)3.4H2O (1 mol %). Two methods, both of which avoid the use of benzene, have been developed.
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Affiliation(s)
- Nicholas M Leonard
- Department of Chemistry, Illinois Wesleyan University, Bloomington, Illinois 61701, USA
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Matsumura E, Morita Y, Date T, Tsujibo H, Yasuda M, Okabe T, Ishida N, Inamori Y. Cytotoxicity of the hinokitiol-related compounds, gamma-thujaplicin and beta-dolabrin. Biol Pharm Bull 2001; 24:299-302. [PMID: 11256489 DOI: 10.1248/bpb.24.299] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Gamma-thujaplicin and beta-dolabrin, the constituents of the wood of Thujopsis dolabrata Sieb. et Zucc. var. hondai showed strong in vitro cytotoxic effects against the human stomach cancer cell lines KATO-III and Ehrlich's ascites carcinoma. The cytotoxic effects of the two compounds against both tumor cell lines were clear when cell growth was measured by the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) method. Gamma-thujaplicin and beta-dolabrin at 0.32 microg/ml inhibited cell growth of human stomach cancer KATO-III by 85 and 67%, and Ehrlich's ascites carcinoma by 91 and 75%, respectively. There is no large difference in cytotoxicity between these compounds, but the activity of gamma-thujaplicin was slightly more potent than that of beta-dolabrin. On the other hand, hinokitiol acetate did not show a cytotoxic effect, suggesting that at least a part of the mechanism of the cytotoxic effect of hinokitiol-related compounds is due to metal chelation between the carbonyl group at C-1 and the hydroxyl group at C-2 in the tropolone skeleton of these molecules. The acute toxicities [50% lethal dose (LD50) value: intraperitoneal injection, Van der Waedem] of gamma-thujaplicin and beta-dolabrin in mice were 277 mg/kg and 232 mg/kg, respectively.
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Affiliation(s)
- E Matsumura
- Osaka University of Pharmaceutical Sciences, Japan
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Miyamoto D, Kusagaya Y, Endo N, Sometani A, Takeo S, Suzuki T, Arima Y, Nakajima K, Suzuki Y. Thujaplicin-copper chelates inhibit replication of human influenza viruses. Antiviral Res 1998; 39:89-100. [PMID: 9806486 DOI: 10.1016/s0166-3542(98)00034-5] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
The effects of alpha-, beta- and gamma-thujaplicins and six of their metal chelates on human influenza virus-induced apoptosis in Madin-Darby canine kidney (MDCK) cells were examined by DNA fragmentation and flow cytometry. Among the compounds tested, thujaplicin copper chelates inhibited apoptosis induced in the infected MDCK cells with influenza A/PR/8/34(H1N1), A/Shingapol/1/57(H2N2), A/Aichi/2/68(H3N2) and B/Lee/40 viruses, at concentrations of more than 5 microM. These results indicate that the copper chelates inhibit influenza virus-induced apoptosis and that the inhibitory effects may be independent of influenza virus subtype or types. Furthermore, the copper chelates also inhibited the release of the viruses from the infected MDCK cells during apoptosis. The anti-apoptotic effects of the copper chelates may occur 2 4 h postinfection, suggesting that the copper chelates affect MDCK cells directly in the early stage of influenza virus-induced apoptosis. In this study, we demonstrated that thujaplicin-copper chelates inhibit influenza virus-induced apoptosis of MDCK cells and also inhibit virus replication and release from the infected cells.
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Affiliation(s)
- D Miyamoto
- Department of Biochemistry, University of Shizuoka, School of Pharmaceutical Sciences, Japan
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