... Synthesis 2012; 44(9): 1405-1409 DOI: 10.1055/s ... Zoom Image Scheme 1 Davis' pyrene synthesis: R 1 = I, H; R 2 –R 4 = various substituents (OBu, NBoc, OMe ... In conclusion, we have synthesized the 2,6-dibromobiphenyls 3a–e from their respective boronic acid precursors 2a–d ...