2,7-Diborylanthracene as a Useful Building Block for Extended π-Conjugated Aromatics
作者:Ryota Ozawa、Kenji Yoza、Kenji Kobayashi
DOI:10.1246/cl.2011.941
日期:2011.9.5
Ir-catalyzed direct diborylation of anthracene produced a 1:1 mixture of 2,6- and 2,7-diborylanthracenes, which could be separated by recrystallization. The Suzuki–Miyaura cross-coupling using 2,7-diborylanthracene gave extended π-conjugated 2,7-disubstituted anthracene derivatives as building blocks for macrocycles. A 1:1 mixture of 2,7-di(4-pyridyl)anthracene and [Pd(dppp)(OTf)2] self-assembled into a [3 + 3] macrocycle.
以Ir为催化剂的蒽的直接二硼化反应产生了2,6-和2,7-二硼化蒽的1:1混合物,可以通过重结晶分离。使用2,7-二硼化蒽进行的铃木-宫浦交叉偶联反应生成了扩展的π-共轭的2,7-取代的蒽衍生物,作为宏环的构建基块。2,7-二(4-吡啶基)蒽和[Pd(dppp)(OTf)2]的1:1混合物自组装成一个[3 + 3]宏环。