[5]在轴位置具有三甲基甲硅烷基的菲是通过钌催化的1-甲酰基-7菲衍生的醛亚胺的直接CH芳基化反应,然后依次进行Wittig烯化反应和铋催化的所得乙烯基环化反应合成的醚。通过使用相同的合成构件以及连续的Wittig烯化和光环化反应,稠合苯环的数量很容易增加到7个,即可得到3,12-二甲硅烷基[7]并苯。甲硅烷基的引入赋予[ n ]并苯骨架良好的溶解度,并使其能够进一步官能化。这些新的电子结构[ n苯并菲是通过光物理测量和密度泛函理论计算确定的,这显然暗示了整个π构架的有效共轭。
A novel and versatile synthetic method for picene derivatives is developed using the Pd-catalyzed intramolecular double cyclization of the corresponding 2,3-bis[(1Z)-2-phenylethenyl]-1,4-dichlorobenzenes, which are readily prepared by Suzuki–Miyaura cross-coupling reactions of polyhalobenzenes with (Z)-arylethenylboronates. The physical properties of the obtained picenes can be modified via introducing
[5]Phenacene with trimethylsilyl groups at the axispositions was synthesized by the ruthenium‐catalyzed direct C−H arylation of a 1‐formyl‐7‐phenanthrene‐derived aldimine, followed by sequential Wittig olefination and bismuth‐catalyzed cyclization of the resulting vinyl ethers. By using the same synthetic building blocks and sequential Wittig olefination and photocyclization, the number of fused benzene
[5]在轴位置具有三甲基甲硅烷基的菲是通过钌催化的1-甲酰基-7菲衍生的醛亚胺的直接CH芳基化反应,然后依次进行Wittig烯化反应和铋催化的所得乙烯基环化反应合成的醚。通过使用相同的合成构件以及连续的Wittig烯化和光环化反应,稠合苯环的数量很容易增加到7个,即可得到3,12-二甲硅烷基[7]并苯。甲硅烷基的引入赋予[ n ]并苯骨架良好的溶解度,并使其能够进一步官能化。这些新的电子结构[ n苯并菲是通过光物理测量和密度泛函理论计算确定的,这显然暗示了整个π构架的有效共轭。