- Influence of imidazolium ionic liquids on fluorescence of push-pull diphenylbutadienes
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A series of donor-acceptor substituted diphenylbutadienes have been synthesized and their fluorescence properties in organic solvents and imidazolium ionic liquid media were investigated. Substituted diphenylbutadienes show remarkable solvatochromic emiss
- Vasu, Anuji K.,Katla, Jagadish,Malek, Naved I.,Kanvah, Sriram
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- One-pot synthesis of 1,4-diarylnaphthalenes via a Wittig-Horner reaction/[4+2] cycloaddition/dehydrogenation sequence
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A one-pot synthesis of 1,4-diarylnaphthalenes from cinnamaldehydes, dimethyl benzylphosphonates, and benzenediazonium-2-carboxylate is described. The tandem process involves the Wittig-Horner reaction of the cinnamaldehyde with the benzylphosphonate, [4+2
- Chen, Zhengbo,Shou, Wangge,Wang, Yanguang
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experimental part
p. 1075 - 1080
(2009/12/03)
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- Electrochemical reduction of certain fluorenyl and xanthenyl olefins
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The reduction of certain fluorene and xanthene containing olefins at a mercury electrode using cyclic voltammetry has been investigated.In DMF, fluorene-9-(4-nitrophenyl)methylene (1) reveals two distinct reversible one-electron redox waves corresponding to anion radical and dianion formation.Some other olefins particularly stilbenes (9-14) and substituted propenones (7,8) show commonality in the emergence of at least one distinct reversible reduction couple.Anion radicals of nearly all of the olefins (1-14) studied in this work generated electrochemically or by chemical 1-electron reductants, exhibited considerable stability.
- Handoo, Kishan L,Kaul, Anju
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p. 579 - 583
(2007/10/02)
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- Palladium-Catalyzed Syntheses of Aryl Polyenes
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The palladium-catalyzed arylation reaction has been employed to prepare a variety of mono- and diaryl 1,3-dienes and 1,3,5-trienes.The yields were good when electron withdrawing substituents were present in the aryl groups but only poor to fair when electron-donating groups were involved.Monoaryl dienes and trienes reacted well with all types of aryl halides to give mixed diaryl derivatives. 2-Bromostyrene reacts with phenylhexatriene to form 1,8-diphenyloctatetraene and with hexatriene to form 1,10-diphenyldecapentaene, but both only in about 15percent yield.
- Mitsudo, Taki-aki,Fischetti, William,Heck, Richard F.
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p. 1640 - 1646
(2007/10/02)
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