Observation of a non-conventional Horner–Wadsworth–Emmons olefination product and the effect of the lateral ethyl substitution on the solid state fluorescence
作者:Riju Davis、Shibu Abraham、Nigam P. Rath、Suresh Das
DOI:10.1039/b408748h
日期:——
henyl)-4-(ethyl)buta-1E,3E-diene (MCBE) and 1-(p-N,N-dimethylaminophenyl)-4-(p-cyanophenyl)-4-(ethyl)buta-1E,3E-diene (ACBE), which bear an ethyl group substituent on their butadiene chain. The formation of these products suggests a base-catalyzed 1,3-migration of an ethyl group from an oxygen center to the benzylic position in the initially formed phosphonate. The presence of the ethyl group in an
供体-受体取代diphenylbutadienes,即1-(p -甲氧基苯基)-4-(p氰基苯基)丁1 ë,3 é -二烯(MCB)和1-(p - Ñ,Ñ -dimethylaminophenyl)-4- (p-氰基苯基)buta-1 E,3 E-二烯(ACB)在其固体中显示出与溶液中的荧光明显不同的荧光性质。红移吸收和发射光谱固态观察到的现象归因于J聚集体的形成。通过霍纳-沃兹沃思-埃蒙斯反应制备这些衍生物,其中膦酸酯 通过治疗获得 对氰基苄基溴 和 亚磷酸三乙酯 被压缩与相应 肉桂醛,也产生了非传统烯产物1-(p -甲氧基苯基)-4-(p氰基苯基)-4-(乙基)丁-1- ë,3 é -二烯(MCBE)和1-(p - Ñ,N-二甲氨基苯基)-4-(对氰基苯基)-4-(乙基)buta-1 E,3 E-二烯(ACBE)乙基丁二烯链上的取代基。这些产物的形成表明碱催化的1,3-迁移乙基从氧中心