An oxaboraphenanthrene is generated from a 9,10-dihydro-9,10-diboraanthracene through boron extrusion/C–C coupling upon addition of mesityl lithium and chromatographic workup.
Key structural and optoelectronic features of 2,3,6,7-tetraarylated diboraanthracenes were compared with those of corresponding singly and doubly ring-closed diboratetracenes and -pentacenes.
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