27370-90-7Relevant articles and documents
α,ω-Diphenylpolyenes cabable of exhibiting twisted intramolecular charge transfer fluorescence: A fluorescence and fluorescence probe study of nitro- and nitrocyano-substituted 1,4-diphenylbutadienes
Singh, Anil K.,Darshi, Manjula,Kanvah, Sriram
, p. 464 - 471 (2000)
1,4-Diphenylbutadiene compounds, namely 1-p-cyanophenyl-4-phenylbuta-1E,3E-diene (2), 1-p-nitrophenyl-4-phenylbuta-1E,3E-diene (3), 1-cyano-1,4-diphenylbuta-1Z,3E-diene (4), 1-p-cyanophenyl-4-p-nitrophenylbuta-1E,3E-diene (5), 1-cyano-1-p-nitrophenyl-4-ph
Synthesis and evaluation of a series of 1,4-diarylbutadienes for anticoccidial activity
Gage, Jennifer L.,Kirst, Herbert A.,O'Neil, Deirdre,David, Bridget A.,Smith II, Charles K.,Naylor, Sharon A.
, p. 4083 - 4091 (2003)
During the course of a collaborative screening program, a set of 1-phenyl-4-pyridyl-butadienes was found to exhibit in vitro activity against Eimeria tenella in a cell-based assay. Activity was dependent on the chain length and degree of unsaturation of t
Phosphorus-recycling wittig reaction: Design and facile synthesis of a fluorous phosphine and its reusable process in the wittig reaction
Yamamoto, Yuki,Kawaguchi, Shin-Ichi,Nishimura, Misaki,Sato, Yuki,Shimada, Yoshihisa,Tabuchi, Akihiro,Nomoto, Akihiro,Ogawa, Akiya
, p. 14684 - 14696 (2020/11/30)
This study shows that phosphorus sources can be recycled using the appropriate fluorous phosphine in the Wittig reaction. The designed fluorous phosphine, which has an ethylene spacer between its phosphorus atom and the perfluoroalkyl group, was synthesized from air-stable phosphine reagents. The synthesized phosphine can be used for the Wittig reaction process to obtain various alkenes in adequate yields and stereoselectivity. The concomitantly formed fluorous phosphine oxide was extracted from the reaction mixture using a fluorous biphasic system. The fluorous phosphine was regenerated by reducing the fluorous phosphine oxide with diisobutylaluminum hydride. Finally, a series of gram scale phosphorus recycling processes were performed, which included the Wittig reaction, separation, reduction, and reuse.
Selective photoisomerization of methyl substituted nitro diphenylbutadienes
Agnihotri, Harsha,Palakollu, Veerabhadra,Kanvah, Sriram
, p. 40 - 49 (2014/11/12)
A series of p-nitro substituted trans-diphenylbutadienes is synthesized and their photophysical and photochemical properties are investigated. All the dienes have a very low quantum yield of fluorescence but exhibit remarkable solvatochromic emission shifts attributed to twisted intramolecular charge transfer. Photochemical irradiation of simple p-nitro substituted diphenylbutadienes reveals inefficient or no detectable photoisomerization. However, substituting a methyl group on the butadiene chain of p-nitro substituted diphenylbutadiene or replacing the nitro group with cyano group yields the corresponding trans-cis isomers. In the case of simple nitrodienes, strong intramolecular charge transfer character in the excited state aids dissipation of absorbed energy through non-photochemical and non-radiative channels. The steric effect caused by the presence of methyl group lowers the isomerization barrier in methyl substituted dienes leading to a regioselective isomerization.