95970-13-1Relevant articles and documents
POLYBROMINATED AROMATIC COMPOUNDS. IV. METHOXYDEBROMINATION REACTIONS OF POLYBROMOBENZENES IN PYRIDINE
Shishkin, V. N.,Lapin, K. K.,Tanaseichuk, B. S.,Butin, K. P.
, p. 516 - 522 (2007/10/02)
The rates were measured and the orientation was studied for the methoxydebromination of all polybromobenzenes C6HnBr6-n (n = 0-3) in pyridine at 115 deg C.From comparison of the partial rates of substitution of the bromine atom at various positions of the benzene ring it was found that the activating effect of the bromine atom in relation to the point of nucleophilic attack changes in the order o-Br > m-Br > p-Br, and the directing selectivity of the bromine is low (compared with fluorine in the methoxydefluorination of polyfluorobenzenes) and increases with decrease in the number of bromine atoms in the aromatic ring of the substrate.