作者:Takanori Soya、Hirotaka Mori、Atsuhiro Osuka
DOI:10.1002/anie.201811433
日期:2018.11.26
15‐tris‐(pentafluorophenyl)tetrapyrrane followed by oxidation with DDQ and was oxidized to its [54]‐ and [52]congeners in a stepwise manner. Metalation of the [52]dodecaphyrin with Pd2(dba)3 gave two bis‐PdII complexes that are isomers of metalation sites: anti and syn with regard to the 1,4‐phenylene bridge. The anti‐isomer was easily oxidized to its N‐fused form, a quadruply twisted non‐aromatic or weakly aromatic
π共轭电路的分子拓扑在芳香族和抗芳香族化合物的化学中变得越来越重要。内-五氟苯基取代的5,35-(1,4-亚苯基)桥联的[56]十二烷基卟啉是通过1,4-亚苯基-桥联的二甲醇二聚体和5,10,15-三(五氟苯基)四吡喃的缩合反应合成的用DDQ氧化,然后逐步氧化为[54]-和[52]同源物。[52]十二烷基卟啉与Pd 2(dba)3的金属化得到两个bis-Pd II属于金属化位点异构体的络合物:关于1,4-亚苯基桥的反式和顺式。抗异构体很容易被氧化成N融合形式,即四重扭曲的非芳族或弱芳族大环。另一方面,该同分异构体被发现是具有四重扭曲结构的Hückel芳族分子的第一个实例。