Unprecedented Regioregular Poly(1,4‐arylene)s Prepared by Nickel(II)‐Catalyzed Cross‐Coupling Polymerization of 2,5‐Disubstituted Bromo(chloro)arylene
作者:Yushin Shibuya、Naoki Nakagawa、Naoki Miyagawa、Toyoko Suzuki、Kentaro Okano、Atsunori Mori
DOI:10.1002/anie.201903791
日期:2019.7.8
unprecedented synthesis of regioregular head‐to‐tail‐type poly(1,4‐arylene)s bearing different substituents at the 2‐ and 5‐positions is described. They were prepared by the polymerization of 2,5‐disubstituted bromo(chloro)arylenes by selective halogen–metal exchange with a Grignard reagent and subsequent cross‐coupling polymerization with a nickel catalyst [NiCl2(dppp)]. Formation of the regioregular poly(1
描述了在2和5位带有不同取代基的区域规则的头对尾型聚(1,4-亚芳基)的空前合成。它们是通过与格氏试剂选择性地进行卤素-金属交换,然后与镍催化剂[NiCl 2(dppp)]进行交叉偶联聚合,来聚合2,5-二取代的溴(氯)亚芳基。核磁共振波谱学证实了区域规则的聚(1,4-亚芳基)的形成,并显示出与具有不受控制的区域规则性的那些聚合物的显着差异。溴(氯)亚芳基与手性烷氧基取代基的聚合也导致区域规则的头尾型聚亚芳基,表现出圆二色性,因此表明形成了具有更高规则性的结构。