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1
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0027526047
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Resveratrol dimers anigopreissin A and gnetuhainins B and F are isolated from the roots of Anigozanthos preissi, Musu cavendishii and the lianas of Gnetum hainanense, respectively. The tetrameric compounds vitisifurans A and B and amurensins L and M are isolated from the roots and corks of Vitis vinifera and Vitis amurensis, respectively. For their isolation, strong anti-inflammatory and anti-histaminic properties, and their use as traditional antihepatotoxic drugs in Oriental medicine, see: a) Y. Oshima, A. Kamijou, H. Moritani, K.-I. Namao, Y Ohizumi, J. Org. Chem. 1993, 58, 850-853;
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see also: e) T. S. Wu, M. Y. Hsu, A. G. Damu, P. C. Kuo, C. R. Su, C. Y. Li, H. D. Sun, Heterocycles 2003, 60, 397-404.
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The employment of diarylbenzofurans as cyclooxygenase-2 (COX-2) inhibitors has been claimed for the treatment of inflammatory disorders. See, for example: a) H.-C. Huang, T. S. Chamberlain, K. Seibert, C. M. Koboldt, P. C. Isakson, D. B. Reitz, Bioorg. Med. Chem. Lett. 1995, 5, 2377-2380;
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b) F. S. Caruso, (Algos Pharmaceutical Corp., USA) 2000, WO 20000525 (Chem. Abstr. 132:343345);
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Caruso, F.S.1
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c) H. M. Elokdah, G. R. Mcfarlane, S. C. Mayer, D. L. Crandall, (Wyeth, John, and Brother Ltd., USA), 2003, WO 2003000671 (Chem. Abstr. 138:73168);
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0037030605
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Diarylbenzofurans have been reported to show noteworthy activity against certain types of cancer, probably due to their ability to inhibit polymerisation of tubulin, see: d) B. L. Flynn, E. Hamel, M. K. Jung, J. Med. Chem. 2002, 45, 2670-2673;
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Flynn, B.L.1
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20744436034
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(Idemitsu Kasan Co., Japan), JP 20000711
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for some technological applications of diarylbenzofurans, such as their use as organic electroluminescent devices, see: e) M. Funabashi, H. Kawamura, H. Azuma, C. Hosokawa (Idemitsu Kasan Co., Japan) 2000, JP 20000711 (Chem. Abstr. 133:96595).
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Funabashi, M.1
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0037121559
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The common methods involving the formation of one bond (single or double) of the heterocycle are i) arylation of 2-arylfuran precursors: a) W.-M. Dai, K. W. Lai, Tetrahedron Lett. 2002, 43, 9377-9380;
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photolysis of arylvinyl bromides and vinylbenzoquinones: g) C. Galli, P. Gentili, A. Guarnieri, S. Kobayashi, Z. Rappoport, J. Org. Chem. 1998, 63, 9292-9299;
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h) H. Iwamoto, A. Takuwa, K. Hamada, R. Fujiwara, J. Chem. Soc., Perkin Trans. 1 1999, 575-581;
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electrocyclisation of diaryl-α-acylcarbocationic species: i) M. Schmittel, A. Burghart, H. Werner, M. Laubender, R. Söllner, J. Org. Chem. 1999, 64, 3077-3085;
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See also: k) M. A. Ashraf, M. A. Jones, N. E. Kelly, A. Mullaney, J. S. Snaith, I. Williams, Tetrahedron Lett. 2003, 44, 3151-3154.
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22
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20744457698
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The access to diarylbenzofurans has been reported by sequential formation of two or more bonds of the furan ring, using the following procedures: i) condensation between benzoins and phenols in acidic media: a) B. J. Morrison, O. C. Musgraves, Tetrahedron 2002, 58, 4225-4260;
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20744451852
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intermolecular nucleophilic attack of phenols to diaryl cations: b) H. D. Choi, P. J. Seo, S.W. Son, J. Korean Chem. Soc. 2001, 45, 500-504;
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1,3-dipolar cycloadditions of o-substituted phenols and alkynes: c) S. Spyroudis, J. Org. Chem. 1986, 57, 3453-3456;
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0037471492
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palladium-catalysed multi-component coupling of arylalkynes, haloarenes and o-halophenols, see ref. [2c]; v) tandem α-arylation/heterocyclisation of deoxybenzoins: d) V. R. Veeramaneni, M. Pal, K. R. Yeleswarapu, Tetrahedron 2003, 59, 3283-3290.
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Veeramaneni, V.R.1
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for a recent application, see also ref. [4d]
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Terao, Y.1
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27
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2342585273
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For the employment of phenanthro[9,10] heterocycles in the construction of calixarenes applicable to molecular recognition and/or catalysis, see: E. Botana, K. Nättinen, P. Prado, K. Rissanen, J. de Mendoza, Org. Lett. 2004, 6, 1091-1094.
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K. Z. Wang, L.-H. Gao, G.-Y. Bai, L.-P. Jin, Inorg. Chem. Commun. 2002, 5, 841-843.
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Wang, K.Z.1
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(Optiva, USA), US 6583284 8
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E. N. Sidorenko, T. Y. Dutova (Optiva, USA), 2003, US 6583284 8 (Chem. Abstr. 139:69282).
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Zhao, W.1
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20744437996
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(Toray Industries, Japan), JP 2003059670
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a) T. Tominaga, A. Makiyama, T. Kohama (Toray Industries, Japan), 2003, JP 2003059670 (Chem. Abstr. 138:212567);
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Chem. Abstr.
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Tominaga, T.1
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20744431544
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(Mitsui Chemicals, Japan), JP 2002043061
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b) T. Ishida, T. Shimamura, M. Nakatsuka (Mitsui Chemicals, Japan), 2002, JP 2002043061 (Chem. Abstr. 136:158603).
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Chem. Abstr.
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Ishida, T.1
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35
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77956658860
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(Japan Science and technology Corp., Japan), JP2002265466; as a consequence of their planar structure, DNA intercalation of phenanthro[9,10] heterocycles has attracted much attention, closely related to the fact that interaction with DNA can be monitored by the change of fluorescence intensity
-
Their application to the manufacture of several electronic devices, such as diodes, transistors and wiring materials has been reported, see: a) S. Ogawa, K. Ogawa, N. Yoshimoto, Y. Hiroi, (Japan Science and technology Corp., Japan) 2002, JP2002265466 (Chem. Abstr. 137:247701); as a consequence of their planar structure, DNA intercalation of phenanthro[9,10] heterocycles has attracted much attention, closely related to the fact that interaction with DNA can be monitored by the change of fluorescence intensity,
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Chem. Abstr.
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Ogawa, S.1
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see: b) S.-H. Yang, J.-J. Shie, J.-M. Fang, S. K. Nandy, H.-Y. Chang, S.-H. Lu, G. Wang, J. Org. Chem. 2002, 67, 5208-5215;
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Zeytinoglu, H.1
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finally, antibacterial and antifungal activity have been claimed in: d) A. A. Pechkin, M. M. El'chaninov, V. M. Stoyanov, Russ. J. Org. Chem. 2002, 38, 726-730;
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Pechkin, A.A.1
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20744447451
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(Lorus Therapeutics, Canada), WO 2004016086
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e) M. Huesca, R. Alqawasmeh, A. H. Young, Y. Lee, (Lorus Therapeutics, Canada) 2004, WO 2004016086 (Chem. Abstr. 140:193035).
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Huesca, M.1
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F. Churruca, R. SanMartin, M. Carril, I. Tellitu, E. Domínguez, Tetrahedron 2004, 60, 2393-2408.
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Churruca, F.1
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Tellitu, I.4
Domínguez, E.5
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41
-
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20744449268
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-
note
-
In fact, triarylethanones of type 5 are currently being employed in our research group for the synthesis of several heterocyclic systems, such as diarylindoles. The corresponding results will be published in due course.
-
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42
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0042291889
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(Ed.: D. Astruc), Wiley VCH, Weinheim (Germany)
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For a recent review, see: G. Lessene, K. S. Feldman, in Modern Arene Chemistry (Ed.: D. Astruc), Wiley VCH, Weinheim (Germany), 2002, pp. 479-538.
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Lessene, G.1
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a) C. Amatore, E. Blart, J. P. Genêt, A. Jutand, S. Lemaire-Audoire, M. Savignac, J. Org. Chem. 1995, 60, 6829-6839;
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Amatore, C.1
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b) D. E. Bergbreiter, B. L. Case, Y.-S. Liu, J. W. Caraway, Macro-molecules 1998, 31, 6053-6062.
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Bergbreiter, D.E.1
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For arylation reactions that imply formation of C-heteroatom bonds, see: a) M. R. Buchmeiser, K. Wurst, J. Am. Chem. Soc. 1999, 121, 11 101-11 107;
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b) T. Hashizume, K. Yonehara, K. Ohe, S. Uemure, J. Org. Chem. 2000, 65, 5197-5201;
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M. R. Buchmeiser, T. Schareina, R. Kempe, K. Wurst, J. Organomet. Chem. 2001, 634, 34-46.
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0037424409
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Bifunctional palladium and/or other metal catalysts are required. An elegant example can be found in: B. M. Choudary, N. S. Chowdary, S. Madhi, M. Kantam, J. Org. Chem. 2003, 68, 1736-1746.
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Choudary, B.M.1
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50
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20744434968
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note
-
The above-described isolation of intermediate triarylethanones 5a,b is in clear accordance with such a mechanistic proposal. For a more detailed discussion on this subject see ref. [5].
-
-
-
-
51
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3042708394
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-
Among heterogeneous palladium catalysts, the use of polymersupported and polymer-incarcerated catalysts has gained much attention in the last few years. In fact, catalysis has become an obvious and important area of application for functionalised polymers, and is already established in fundamental synthetic protocols, such as hydrogenation, allylic alkylation or Suzuki and Heck coupling reactions. For some recent examples, see: a) K. Okamoto, R. Akiyama, S. Kobayashi, Org. Lett. 2004, 6, 1987-1990;
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Okamoto, K.1
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A. Drelinkiewicza, A. Waksmundzka, W. Makowski, J. W. Sobczak, A. Krol, A. Zieba, Catal. Today 2004, 93, 143-146.
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54
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20744448641
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For a schematic view of these FibreCat™ catalysts, see ref. [14]. The FibreCat™ 1000 series is commercialized by Johnson Matthey Chemicals, Orchard Road, Royston, Herts, SG8 5HE, UK. Further information about FibreCat™ catalysts, including their practical application to Suzuki and Heck coupling reactions, can be found at http://www.chemicals.matthey.com.
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a) F. Churruca, R. SanMartin, I. Tellitu, E. Domínguez, Tetrahedron Lett. 2003, 44, 5925-5929.
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For other examples of such phenyl-aryl exchange, see: b) V. V. Grushin, Organometallics 2000, 19, 1888-1900;
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