Fluorescent hexaaryl- and hexa-heteroaryl[3]radialenes: Synthesis, structures, and properties
作者:Antonio Avellaneda、Courtney A Hollis、Xin He、Christopher J Sumby
DOI:10.3762/bjoc.8.7
日期:——
The syntheses of three new [3]radialenes - hexakis(3,5-dimethylpyrazolyl)-, hexakis(3-cyanophenyl)-, and hexakis(3,4-dicyanophenyl)[3]radialene (1-3) - are reported. Compound 3 is obtained in five steps with an excellent yield of 76% in the key step. Compared to that, the respective steps of the syntheses of 1 and 2 result in lower yields. All compounds adopt a double bladed propeller conformation
报道了三种新的 [3] radialene - hexakis(3,5-二甲基吡唑基)-、hexakis(3-cyanophenyl)-和 hexakis(3,4-dicyanophenyl)[3]radialene (1-3)-的合成。化合物3分五步得到,关键步骤收率为76%。与此相比,合成1和2的各个步骤导致较低的产率。所有化合物在溶液中均采用双叶螺旋桨构象。化合物 3 比先前报道的六芳基 [3] radialenes 缺电子得多,在 CH(2)Cl(2) 中的还原电位为 -0.06 和 -0.45 V。这些化合物大多显示具有大斯托克斯位移的红色荧光。