Chloroanthraquinones were found to undergo facile Suzuki–cross coupling with substituted phenyl boronic acids using a commercial catalyst Pd(PPh3)4 and with Pd(PPh3)4 prepared in situ from Pd(PPh3)2Cl2 and PPh3.
Brominated Thiophenes as Precursors in the Preparation of Brominated and Arylated Anthraquinones
作者:Thies Thiemann、Yasuko Tanaka、Jesus Iniesta
DOI:10.3390/molecules14031013
日期:——
Brominated anthraquinones can be synthesized directly from bromothiophenes when these are reacted with 1,4-naphthoquinones in the presence of meta-chloroperoxy-benzoic acid. The bromoanthraquinones are versatile building blocks in the preparation of arylated anthraquinones and of extended π-systems with interspersed anthraquinone units.