作者:Sambasiva R. Bheemireddy、Pamela C. Ubaldo、Peter W. Rose、Aaron D. Finke、Junpeng Zhuang、Lichang Wang、Kyle N. Plunkett
DOI:10.1002/anie.201508650
日期:2015.12.21
derivatives with externally fused five‐membered rings are prepared by means of a key palladium‐catalyzed cyclopentannulation step. The target compounds are synthesized by chemical manipulation of a partially saturated 6,13‐dibromopentacene precursor that can be fully aromatized in a final step through a DDQ‐mediated dehydrogenation reaction (DDQ=2,3‐dichloro‐5,6‐dicyano‐1,4‐benzoquinone). The new 1,2,8,9‐t
通过关键的钯催化的环戊烷制备步骤,制备了一类新的具有外部稠合五元环的稳定化并五苯衍生物。目标化合物是通过化学处理部分饱和的6,13-二溴并五苯前体合成的,该前体可以在最后一步通过DDQ介导的脱氢反应(DDQ = 2,3-二氯-5,6-二氰基-1)完全芳构化,4-苯醌)。新的1,2,8,9-四芳基二环戊并[fg,qr]并五苯衍生物的能隙窄至约1.2 eV,并表现为强电子受体,其未占据的分子轨道能量最低,介于-3.81和-3.90 eV之间。光降解研究表明,新化合物比6,13-双(三异丙基甲硅烷基乙炔基)并五苯(TIPS-并五苯)更耐光。