F 1633 (OTTO) 4-Fluorophenylboronic acid, 97% Cas 1765-93-1 - used as a reactant in coupling reactions with arenediazonium tetrafluoroborates, iodonium salts, and iodanes.F 1633 (OTTO) 4-Fluorophenylboronic acid, 97% Cas 1765-93-1 - used to make novel biologically active terphenyls.