作者:Tomoyuki Tajima、Akio Yamakawa、Keitaro Fukuda、Yuuki Hayashi、Masahiko Nakano、Yutaka Takaguchi
DOI:10.1246/cl.2012.1622
日期:2012.12.5
A new pentacene dendrimer was synthesized in 81% yield through the aromatization of a dihydropentacene derivative having benzyl ether dendrons at the C2, C3, C9, and C10 positions. The dendrimer is very soluble in various organic solvents such as toluene, benzene, chloroform, dichloromethane, acetone, and ethyl acetate. The half-life of the dendrimer reaches 22.4 min upon photoirradiation in air. Interestingly, regiospecific [4 + 2] cycloaddition reactions proceeded at the central ring of the pentacene.
通过将苯甲醚树枝状单元引入到二氢并五苯衍生物的C2、C3、C9和C10位置上,并进行芳构化反应,成功合成了一种新型的并五苯树枝状聚合物,产率高达81%。该树枝状聚合物在多种有机溶剂中具有良好的溶解性,包括甲苯、苯、氯仿、二氯甲烷、丙酮和乙酸乙酯。在空气中进行光照射时,其半衰期达到22.4分钟。值得注意的是,在并五苯的中心环上发生了区域选择性的[4 + 2]环加成反应。