The generation of C,O,O-trilithiated derivatives of dihydric phenols
作者:José M. Saá、Jeroni Morey、Guillem Suñer、Antoni Frontera、Antoni Costa
DOI:10.1016/0040-4039(91)80507-3
日期:1991.12
Halogenated dihydricphenols (hydroquinones and resorcinols) undergo halogen metal exchange with nBuLi/TMEDA/THF or ether (inverse addition) under sonication, thereby generating a C,O,O-trilithiated species which can be trapped with electrophiles.
simple, efficient and mild method for the selective bromination of activated aromaticcompounds using ammonium bromide as the source of bromine and Oxone® as the oxidant in methanol or water as solvent is reported. The reaction proceeds at ambient temperature in yields ranging from moderate to excellent without a catalyst. bromination - aromaticcompounds - ammonium bromide - Oxone® - selectivity