B 3663 (OTTO) 2-Bromopyrimidine, 97% - used in the preparation of 2,7-bis(2-pyrimidyl)-9,9-dihexylfluorene by cross-coupling with 9,9-dihexylfluorene-2,7-diboronic acid. It undergoes microwave-assisted aminocarbonylation at C-2 with palladium and molybdenum hexacarbonyl.