- Mild Darzens Annulations for the Assembly of Trifluoromethylthiolated (SCF3) Aziridine and Cyclopropane Structures
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We report mild new annulation approaches to trisubstituted trifluoromethylthiolated (SCF3) aziridines and cyclopropanes via Darzens inspired protocols. The products of these anionic annulations, rarely studied previously, possess attractive features rendering them valuable building blocks for synthesis platforms. In this study, trisubstituted acetophenone nucleophiles bearing SCF3 and bromine substituents in their α position were shown to undergo [2 + 1] annulations with vinyl ketones and tosyl-protected imines under mild reaction conditions.
- Delost, Michael D.,Njardarson, Jon T.
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p. 6121 - 6125
(2021/08/16)
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- Vicarious Nucleophilic Chloromethylation of Nitroaromatics
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Nitroaromatics substituted with electron-acceptor or electron-donor groups undergo vicarious nucleophilic substitution with the lithium salt of dichloromethane to provide chloromethyl-substituted nitroaromatics in good to high yields. The methodology represents a new strategy for the synthesis of benzyl chlorides.
- Khutorianskyi, Viktor V.,Klepetá?ová, Blanka,Beier
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supporting information
p. 5443 - 5446
(2019/07/03)
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- Synthesis, DNA binding, fluorescence measurements and antiparasitic activity of DAPI related diamidines
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A novel series of extended DAPI analogues were prepared by insertion of either a carbon-carbon triple bond (16a-d) or a phenyl group (21a,b and 24) at position-2. The new amidines were evaluated in vitro against both Trypanosoma brucei rhodesiense (T. b. r.) and Plasmodium falciparum (P. f.). Five compounds (16a, 16b, 16d, 21a, 21b) exhibited IC50 values against T. b. r. of 9 nM or less which is two to nine folds more effective than DAPI. The same five compounds exhibited IC50 values against P. f. of 5.9 nM or less which is comparable to that of DAPI. The fluorescence properties of these new molecules were recorded, however; they do not offer any advantage over those of DAPI.
- Farahat, Abdelbasset A.,Kumar, Arvind,Say, Martial,Barghash, Alaa El-Din M.,Goda, Fatma E.,Eisa, Hassan M.,Wenzler, Tanja,Brun, Reto,Liu, Yang,Mickelson, Leah,Wilson, W. David,Boykin, David W.
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scheme or table
p. 557 - 566
(2010/04/29)
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- Synthesis and in vitro antiprotozoal activities of dicationic 3,5-diphenylisoxazoles
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3,5-Bis(4-amidinophenyl)isoxazole (3) - an analogue of 2,5-bis(4- amidinophenyl)furan (furamidine) in which the central furan ring is replaced by isoxazole - and 42 novel analogues were prepared by two general synthetic pathways. The 43 isoxazole derivati
- Patrick, Donald A.,Bakunov, Stanislav A.,Bakunova, Svetlana M.,Kumar, E.V.K. Suresh,Lombardy, Richard J.,Jones, Susan Kilgore,Bridges, Arlene S.,Zhirnov, Oksana,Hall, James Edwin,Wenzler, Tanja,Brun, Reto,Tidwell, Richard R.
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p. 2468 - 2485
(2008/02/03)
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- Synthesis and antiprotozoal activity of dicationic 3,5-diphenylisoxazoles
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Novel dicationic 3,5-diphenylisoxazole compounds are described. Synthetic routes to these novel compounds are provided. Several of the compounds displayed in vitro activity versus Trypanosoma brucei brucei and Plasmodium falciparum comparable to that of furamidine. A majority of the novel compounds also were less toxic to VERO cells than furamidine.
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Page/Page column 24-28; 41
(2010/11/24)
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