2-Methoxy-4,6-bis(trifluoromethyl)phenyllithium: a new stable aryllithium useful as an intermediate to bis(trifluoromethyl)aromatics
作者:Wojciech Dmowski、Krystyna Piasecka-Maciejewska
DOI:10.1016/0022-1139(96)03418-5
日期:1996.5
A method for the preparation of 3,5-bis(trifluoromethyl)anisole (3) has been developed. Lithiation of 3 occurred exclusively at the position ortho to the CH3O group to give a thermally stable lithium derivative 6 which readily undergoes conventional reactions with a number of electrophiles. Formylation and carboxylation of 6 gave bis (trifluoromethyl) derivatives of salicylic aldehyde and salicylic