Preparation, crystal structure, and spectroscopic, chemical, and electrochemical properties of (2E,4E)-4-[4-(dimethylamino)phenyl]-1-(3-guaiazulenyl)-1,3-butadiene compared with those of (E)-2-[4-(dimethylamino)phenyl]-1-(3-guaiazulenyl)ethylene
作者:Shin-ichi Takekuma、Hiroto Matsuoka、Toshie Minematsu、Hideko Takekuma
DOI:10.1016/j.tet.2010.02.064
日期:2010.4
Wittig reaction of 3-[4-(dimethylamino)phenyl]propanal (5) with (3-guaiazulenylmethyl)triphenylphosphonium bromide (4) in ethanol containing NaOEt at 25 °C for 24 h under argon gives the title (2E,4E)-1,3-butadiene derivative 6E in 19% isolated yield. Spectroscopic properties, crystal structure, and electrochemical behavior of the obtained new extended π-electron system 6E, compared with those of the
3- [4-(二甲基氨基)苯基]丙醛(5)与(3-愈苯氮烯基甲基)三苯基phosph溴化物(4)在含NaOEt的乙醇中于25°C在氩气中进行Wittig反应24小时,得到标题(2 E,4 E)-1,3-丁二烯衍生物6E的分离产率为19%。与先前报道的(E)-2- [4-(二甲基氨基)苯基] -1-(3-愈创木烯基)乙烯相比,获得的新的扩展π电子体系6E的光谱性质,晶体结构和电化学行为(12),有文件记录。此外,6E的反应在氩气下于25°C的条件下,在苯中使用1,1,2,2-四氰基乙烯(TCNE)进行24小时制得一种新的Diels-Alder加合物8,分离产率为59%。连同[π4+π2]环加成产物8的光谱性质一起,显示了具有顺式-3,6-取代的1,1,2,2-四氰基-4-环己烯单元的晶体结构。另外,在与上述相同的反应条件下,6E与(E)-1,2-二氰基乙烯(DCNE)的反应没有产物。然而,该