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Konnerth C, Damm C, Schmidt J, Peukert W. Mechanical activation of trans-stilbene during wet grinding. ADV POWDER TECHNOL 2014. [DOI: 10.1016/j.apt.2014.07.011] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Al-Bashir RF, Al-Awadi NA, El-Dusouqui OME. Synthesis of novel sulfonyl-stabilized phosphorus ylides, and the kinetics and mechanism of their conventional and flash vacuum pyrolysis reactions. CAN J CHEM 2005. [DOI: 10.1139/v05-210] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Nine substituted sulfonyl-stabilized phosphorus ylides were prepared by treating their intermediate ylide analogues with phenylmethanesulfonyl fluoride. The stoichiometric ratio of the reactants for each preparation needed to be adjusted according to the basicity of each ylide intermediate. The nine ylide compounds were then subjected to conventional (sealed-tube) gas-phase pyrolysis at 470545 K. The pyrolytic reactions were homogeneous and obeyed a first-order rate equation. The values of the Arrhenius log A (s1) and Ea (kJ mol1) obtained for these reactions averaged 11.12 ± 2.00 and 131.8 ± 24.4, respectively. Analysis of the pyrolysates from conventional pyrolysis and from flash vacuum pyrolysis at 600 K showed the products to be complex mixtures of triphenylphosphine, triphenylphosphine oxide, triphenylphosphine sulfide, and symmetric and unsymmetric alkenes. Conventional pyrolysis also gave novel mixed sulfones and, for the p-methoxyaryl substituent, p-anisaldehyde. The products of the reactions under study are explained on the basis of a mechanism involving a sulfonyl carbene intermediate, and the reaction mechanism is used to rationalize the kinetic results and molecular reactivities.Key words: ylides, synthesis, pyrolysis, kinetics, mechanism.
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Gloyna D, Alder L, Henning HG, Köppel H, Siegmund M, Schleinitz KD. Darstellung von trans-4-Diphenylphosphinyl-stilbenen. ACTA ACUST UNITED AC 2004. [DOI: 10.1002/prac.19803220209] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Schertl S, Hartmann RW, Batzl-Hartmann C, Schlemmer R, Spruss T, Bernhardt G, Gust R, Schönenberger H. 1-(2,6-dichloro-4-hydroxyphenyl)-2-phenylethanes--new biological response modifiers for the therapy of breast cancer. Synthesis and evaluation of estrogenic/antiestrogenic properties. Arch Pharm (Weinheim) 2001; 334:125-37. [PMID: 11382148 DOI: 10.1002/1521-4184(200104)334:4<125::aid-ardp125>3.0.co;2-d] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
[meso-1,2-Bis(2,6-dichloro-4-hydroxyphenyl)ethylenediamine]platinum(II) complexes (meso-1-PtLL'; L,L' = Cl or L = H2O and L' = OSO3) are highly effective towards hormone-sensitive, rodent breast cancers due to their significant estrogenic potencies. Their antitumor activities are caused by modification of the immune response. The pharmacophor of these compounds, the 1,2-bis(2,6-dichloro-4-hydroxyphenyl)ethane (23H), was used as the lead structure in a structure-activity study with the goal of finding new biological response modifiers for the therapy of breast cancer. As intermediates for the synthesis of the 23H derivatives, the CH3O-substituted stilbenes 12E/12Z-16E/16Z were prepared by reaction of the related benzyltriphenylphosphonium halides with 2,6-dichloro-4-methoxybenzaldehyde by the method of Wittig/Campbell and Donald, respectively. Separation of the E/Z-mixtures was performed by fractional crystallization and/or column chromatography. The E-1,2-bis(2,6-dichloro-4-methoxyphenyl)ethene (17E) was obtained by reductive coupling of 2,6-dichloro-4-methoxybenzaldehyde with TiCl4/Zn according to the method of Mukaiyama. Illumination of the solution of 17E in benzene with UV light resulted in an E/Z-isomerization. Compound 17Z could be isolated from this mixture. The CH3O-substituted stilbenes were transformed into their 1,2-diphenylethanes (12H-17H) by catalytic hydrogenation of the C1=C2 double bond. Ether cleavage of the compounds was performed with BBr3. In the estrogen receptor binding assay all OH-substituted 1,2-diphenylethanes showed affinity to the estrogen receptor, which was about two orders of magnitude lower than that of 17 beta-estradiol. In the uterus weight test on the immature mouse 1,2-diphenylethanes with 4-substituted OH groups proved to be "true" estrogens (19H: 2-F/4-OH; 20H: 2-Cl/4-OH; 23H: 2,6-Cl2/4-OH), while those with a 3-substituted OH group in the 2-phenyl ring showed the properties of a "partial" estrogen (18H: 3-OH) or of an "impeded" estrogen (21H: 2-Cl/3-OH; 22H: 2-Cl/5-OH). The latter also showed significant additional antiestrogenic activity. The related E-stilbenes mostly exhibit similar hormonal activities. As a rule, the replacement of the OH groups by the CH3O groups and the change from the E- to the Z-configuration led to a reduction of the estrogenic potencies. Several of the 1-(2,6-dichloro-4-methoxyphenyl)-2-phenylethenes (12E: 3-OCH3; 12Z: 3-OCH3; 15E: 2-Cl/3-OCH3; 15Z: 2-Cl/3-OCH3; 16E: 2-Cl/5-OCH3) produced antiestrogenic effects in the uterus weight test. It is supposed that those new 1-(2,6-dichloro-4-hydroxyphenyl)-2-phenylethanes endowed with marked estrogenic properties are also active as biological response modifiers in animals bearing hormone-sensitive breast cancer. The antiestrogenic derivatives presumably inhibit the breast cancer development by competing with tumor growth stimulating endogenous estrogens for the binding to the receptor. This is to be confirmed in a further study.
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Affiliation(s)
- S Schertl
- Lehrstuhl für Pharmazeutische Chemie II, Institut für Pharmazie, Universität Regensburg, D-93040 Regensburg, Germany
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Schmidt K, Jung M, Keilitz R, Schnurr B, Gust R. Acetylenehexacarbonyldicobalt complexes, a novel class of antitumor drugs. Inorganica Chim Acta 2000. [DOI: 10.1016/s0020-1693(00)00139-0] [Citation(s) in RCA: 59] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Wyrzykiewicz E, Błaszczyk A, Kedzia B. Synthesis and antimicrobial activity of (E)-acetoxystilbenes and alpha,alpha'-dibromoacetoxybibenzyls. FARMACO (SOCIETA CHIMICA ITALIANA : 1989) 2000; 55:151-7. [PMID: 10782388 DOI: 10.1016/s0014-827x(99)00127-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
The synthesis of 13 new (E)-acetoxystilbenes and alpha,alpha'-dibromoacetoxybibenzyls and their antimicrobial activity are reported. The results of microbiological screening of 17 (E)-stilbenols and (E)-acetoxystilbenes, unknown in the literature, have also been discussed. In particular, coumpounds 1c, 1g, 2a, 3a, 3b, 4a, 6a, 6b showed good antibacterial activity against Staphylococcus aureus and 1c also against Bacillus subtilis.
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Affiliation(s)
- E Wyrzykiewicz
- Faculty of Chemistry, Adam Mickiewicz University, Poznań, Poland
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Puciová M, Solĉániová E, Pronayová N, Loos D, Toma Ŝ. Synthesis, structure elucidation of β-chloroferroceneacroleins and β,β′-dichloro-1,1′-ferrocenediacroleins, and their α-phenyl- and α,α′-diphenylderivatives. Attempts on E/Z isomerisation of α-phenyl-β-chloroferroceneacrolein and α,α′-diphenyl-β,β′-dichloroferrocenediacroleins. Tetrahedron 1993. [DOI: 10.1016/s0040-4020(01)87247-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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8
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Bowden K, Ghadir KDF. Transmission of polar effects. Part 21. Alkaline hydrolysis of the 2′- and 4′-substituted 2-methoxycarbonyldiphenylacetylenes and (Z)-2′- and -4′-substituted 2-methoxycarbonylstilbenes and the ionisation and esterification, with diazodiphenylmethane of the acids of the latter series. ACTA ACUST UNITED AC 1990. [DOI: 10.1039/p29900001333] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Jakobsen P, Horobin RW. Preparation and characterization of 4-acetamido-4'-isothiocyanostilbene-2,2'-disulfonic acid (SITS) and related stilbene disulfonates. STAIN TECHNOLOGY 1989; 64:301-13. [PMID: 2484052 DOI: 10.3109/10520298909107022] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
4-Acetamido-4'-isothiocyanostilbene-2,2'-disulfonic acid (SITS) and other 4,4'-stilbene-2,2'-disulfonate derivatives used as reagents in histochemistry and physiology have been prepared in their E isomeric form, and rearranged to the Z isomers by irradiation with visible light. Infrared, and 1H and 13C nuclear magnetic resonance spectra were recorded for these compounds, and used to establish the chemical structures. In particular, it was shown that the E-isomer of SITS decomposed in aqueous solution by hydrolysis of both the acetamido and isocyano groups yielding a diamine; disodium 4,4'-diisothiocyanatostilbene-2,2'-disulfonate (DIDS) also decomposed in solution, while disodium 4,4'-dinitrostilbene-2,2'-sulfonate (DNDS) rearranged from the E-isomer to the Z-isomer when solutions were kept unprotected from light. These results indicate that benchworkers should not be surprised when commercial samples of such stilbenes contain large amounts of various types of impurities.
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Affiliation(s)
- P Jakobsen
- Department of Chemistry, Panum Institute, University of Copenhagen, Denmark
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Wolff T, von Bünau G. Photochemically induced viscosity changes in micellar cetyltrimethylammonium bromide solutions containing 4-hydroxystilbene. ACTA ACUST UNITED AC 1986. [DOI: 10.1016/0047-2670(86)85032-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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11
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Schelz D. Kreuzkonjugierte Cyanine und Merocyanine aus Salzen 1-substituierter 2,3-Dimethylchinoxaline. 2. Mitteilung Über die oxydative Umwandlung der Farbbasen. Helv Chim Acta 1982. [DOI: 10.1002/hlca.19820650534] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Mikołajczyk M, Grzejszczak S, Zatorski A. Application of the additive increments method to the calculation of chemical shift of olefinic protons in aromatic olefines. Tetrahedron 1979. [DOI: 10.1016/s0040-4020(01)93718-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Freyer W. Pyrazolonderivate. IV [9]. Zur Tautomerie und Stereochemie von 4-Aminomethylen-?2-pyrazolinonen-(5). ACTA ACUST UNITED AC 1978. [DOI: 10.1002/prac.19783200403] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Güsten H, Klasinc L, Stefanović D. The electron-impact induced fragmentation of substituted 4-styrylquinolines. ACTA ACUST UNITED AC 1973. [DOI: 10.1002/oms.1210070102] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Güsten H, Schulte-Frohlinde D. Synthese und photochemischecis-trans-Isomerisierung eines quartärencis-Stilbazoliumsalzes. ACTA ACUST UNITED AC 1971. [DOI: 10.1002/cber.19711040207] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Metzler M, Neumann HG. Zur bedeutung chemisch-biologischer wechselwirkungen für die toxische und krebserzeugende wirkung aromatischer amine—III. Tetrahedron 1971. [DOI: 10.1016/s0040-4020(01)91622-9] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Ceccarelli G, Berti G, Lippi G, Macchia B. Stereochemical characterization of some mono- and diaryl substituted ethylene oxides by NMR spectroscopy. ACTA ACUST UNITED AC 1970. [DOI: 10.1002/mrc.1270020409] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Yamada H, Tsuno Y, Yukawa Y. Substituent Effects on the NMR Chemical Shifts of Aromatic Side Chain Protons. I. The Effects ofmeta-Substituents. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 1970. [DOI: 10.1246/bcsj.43.1459] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Die NMR-daten der dibenzylmercaptale einiger aldehyde, besonders des benzaldehyds und seiner kernsubstitutionsderivate—I. Tetrahedron 1970. [DOI: 10.1016/s0040-4020(01)98764-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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23
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Güsten H, Klasinc L. Quantenausbeuten der photochemischen cis-trans-isomerisierung monosubstituierter Stilbene. Tetrahedron Lett 1968. [DOI: 10.1016/s0040-4039(00)89605-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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25
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Casy A, Parulkar A, Pocha P. Studies of the elimination of 1,2-diaryl-4-dimethylaminobutan-2-ols—III. Tetrahedron 1968. [DOI: 10.1016/s0040-4020(01)98711-3] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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HMO-berechnungen an monosubstituierten trans-stilbenen ein vergleich mit den kernmagnetischen resonanzspektren. Tetrahedron Lett 1967. [DOI: 10.1016/s0040-4039(00)90888-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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