... The Journal of Organic ... J. Org. ... As an alternative reagent to liquid bromine, organic ammonium tribromides (OATBs) such as benzyltrimethylammonium tribromide (1, PhCH 2 NMe 3 Br 3 ) and tetrabutylammonium tribromide (2, Bu 4 NBr 3 ) are high molecular weight, stable ...