52792-18-4Relevant articles and documents
Synthesis and photoluminescent properties of conjugated aryl-vinyl dioctyl 2,6-dimethylbenzofuro[5,6-b]furan-3,7-dicarboxylate derivatives
Bosiak, Mariusz J.,Rakowiecki, Marcin,Or?owska, Katarzyna J.,K?dziera, Dariusz,Adams, J?rg
, p. 803 - 811 (2013)
The synthesis of highly fluorescent conjugated benzodifuran aryl-vinyl systems, containing four double bonds and at least four phenyl rings, is described. The ethyl groups of diethyl 2,6-dimethylbenzofuro[5,6-b]furan-3,7- dicarboxylate, obtained by the Michael type condensation of p-benzoquinone and ethyl acetoacetate, were replaced by octyl groups via the transesterification reaction to improve the desired product solubility in common organic solvents. The dioctyl ester was brominated and used for the Wittig reaction with stilbene aldehydes, obtained by the Heck reaction of 4-bromobenzaldehyde and an appropriate styrene. The products, obtained in 48-92% yield, exhibit the UV-Vis fluorescence with high quantum yields, 58-69%.
Novel stilbene-based Fischer base analog of leuco-TAM - (2E,2′Z)-{2-(4-(E)-styrylphenyl)propane-1,3-diylidene}bis(1,3,3-trimethylindoline) - derivatives: Synthesis and structural consideration by 1D NMR and 2D NMR spectroscopy
Keum, Sam-Rok,Lim, Hyun-Woo
, p. 143 - 150 (2016/02/09)
We report the synthesis of a series of novel stilbene-based (St) Fischer base analogs of leuco-triarylmethane (LTAM) dyes by treating Fischer base with (E)-4-styrylbenzaldehyde derivatives. All St-LTAM molecules examined herein are characterized by 1D and 2D NMR. They were found to exhibit ZE configuration and isomerize to their diastereomers EE and ZZ in 2-3 h. They exhibit type I behavior of diastereomeric isomerization.
Palladium chloride and tetraphenylphosphonium bromide intercalated clay as a new catalyst for the Heck reaction
Varma, Rajender S.,Naicker, Kannan P.,Liesen, Per J.
, p. 2075 - 2078 (2007/10/03)
A new modified clay material, prepared by intercalating palladium chloride and tetraphenylphosphonium bromide into montmorillonite K10 clay, catalyzes the Heck reaction and affords trans-stilbenes in high yields.