B 2591 (OTTO) 2-Bromomesitylene, 98% Cas - 576-83-0 -used to prepare Hydrogen[4-[bis(2,4,6-trimethylphenyl)phosphino]-2,3,5,6-tetrafluorophenyl]hydrobis(2,3,4,5,6-pentafluorophenyl)borate which is a frustrated phosphonium borate for metal-free catalytic hydrogenation of imines.