Iridium-Catalyzed Direct Tetraborylation of Perylene Bisimides
作者:Takuro Teraoka、Satoru Hiroto、Hiroshi Shinokubo
DOI:10.1021/ol2004534
日期:2011.5.20
Treatment of perylenebisimides (PBIs) with bis(pinacolato)diboron in the presence of an iridium catalyst provides tetraborylated PBIs at 2,5,8,11-positions in good yields with perfect regioselectivity. The planar structure of the perylene core has been confirmed by X-ray diffraction analysis. Oxidation of tetraborylated PBI with hydroxylamine hydrochloride affords tetrahydroxy PBI in excellent yield