104416-27-5Relevant academic research and scientific papers
A highly stereoselective synthesis of stilbenes under solvent-free conditions
Li, Xia-Bing,Wang, Li,Zhang, Xi-Quan,Gu, Hong-Mei,Guo, Jian,Li, Bao-Lin
, p. 489 - 492 (2010)
A highly stereoselective synthesis of stilbenes (trans-1,2-diarylethylenes) was achieved under solvent-free conditions from aryl-aldehydes and aromatic substances bearing an activated methyl group in the presence of anhydrous K 2CO3 and poly(ethylene glycol). This method avoided the need for completely anhydrous condition and use of a noxious organic solvent.
Construction of polyaromatics via photocyclization of 2-(fur-3-yl) ethenylarenes, using a 3-furyl group as an isopropenyl equivalent synthon
Chen, Ying-Zhe,Ni, Ching-Wen,Teng, Fu-Lin,Ding, Yi-Shun,Lee, Tunng-Hsien,Ho, Jinn-Hsuan
, p. 1748 - 1762 (2014/03/21)
The construction of different types of substituted arenes was demonstrated through the photocyclization of 2-(fur-3-yl)ethenylarenes using a 3-furyl group as an isopropenyl equivalent synthon in the photocyclization reaction. The furan portion of the photocyclization intermediate could be fragmented via a base-induced elimination reaction to yield a series of substituted polyaromatics, including naphthalene, benzofuran, benzothiophene, phenanthrene, phenalene, acenaphthene, and triphenylene. Using different reagents, this method made it possible to introduce methyl or 2-hydroxyethyl groups as substituents at specific positions in these arenes.
Synthesis, spectroscopic characterization and photophysics of new functionalized 2,3-distyrylfurans: Substituent and solvent effects on their photobehavior
?kori?, Irena,Kika?, Ilijana,Kovács, Margit,?indler-Kulyk, Marija,Horváth, Ottó
experimental part, p. 152 - 161 (2010/11/04)
Two new groups of p-chloro-, p-methoxy- and p-nitro-substituted derivatives of the trans,trans-isomers of 2,3-distyrylfuran have been synthesized by a sequence of reactions according to known methods. These new conjugated heterocyclic compounds along with the parent one and its methyl-derivative have been characterized spectrally, photophysically and photochemically. These compounds, except for the nitro-derivatives, display high fluorescence quantum yields in the non-polar n-hexane (ΦF=0.76-0.98). In ethanol of high polarity, the lifetime of their singlet excited state increases from 1.31-2.59ns to 2.01-4.77ns, significantly enhancing the quantum yield of their photochemical reaction from 0.02-0.24 to 0.25-0.46, and diminishing their fluorescence efficiency (ΦF=0.26-0.64). Deviating from the other compounds studied, the quantum yields for both the fluorescence and the photolysis of the nitro-derivatives are rather low (ΦF-4, Φ=0.025-0.042 in ethanol), probably due to an efficient intersystem crossing leading to a non-reactive triplet state. Accordingly, their singlet-state lifetime is also relatively short (τF0.3ns).
SYNTHESIS AND REACTIONS OF β-SUBSTITUTED DERIVATIVES OF FURAN
Jurasek, Adolf,Zvak, Vladimir,Kovac, Jaroslav,Rajniakova, Olga,Stetinova, Jarmila
, p. 2077 - 2083 (2007/10/02)
The 1,4-cycloaddition reaction of 4-phenyl-1,3-oxazole to 2-propinyl benzoate and dimethyl butinedioate afforded the respective 3-furylmethyl benzoate (I) and 3,4-bis(methoxycarbonyl)furan (II).These compounds served for the synthesis of 3-chloromethylfuran and 3,4-bis(chloromethyl)furan, which afforded via Wittig reaction 3-(β-arylvinyl)furans III (aryl = 5-nitro-2-furyl (IIIa), 5-nitro-2-thienyl (IIIb), 1-methyl-4-nitro-2-pyrrolyl (IIIc), and 4-nitrophenyl (IIIe)) and 3,4-bis(β-arylvinyl)furans IV (aryl = 5-nitrofuryl (IVa), 5-nitro-2-thienyl (IVc), and 4-nitrophenyl (IVd)).According to spectral evidence (1H NMR, IR, UV spectra), compounds IIIa and IIIb originated as E isomers, whilst the remanining products are mixture of E and Z isomers; some couples were succeded to separate.
