Tetrahedron Letters. Vol. 35. No. 38, pp. 7055-7056, 1994 Elsevicr Science Ltd Printed in Great Britain ocno-4039/94 $7.oDto.00 0040-4039(94)01456-6 ... Regioselective Bromination of Activated Aromatic Substrates with N-Bromosuccinimide over HZSM-5” ... Vincent Paul, A. Sudalai, Thomas Daniel and KV Srinivasan* ... Abstract: The nuclear as weN as side-chain bromination of activated aromatic substrates has been achieved in high yields and substantial regioselectivity