Abstract
An efficient methodology is reported for the regioselective C-6 arylation of protected uracil via the palladium catalyzed CH functionalization of 1-(4-methoxybenzyl)-3-methylpyrimidine-2,4(1H,3H)-dione with (hetero)aryl halides and boronic acids. Utilization of the Pd(OAc)2/Xantphos catalytic system with a stoichiometric amount of CuI and DBU as the base was vital for the success of this protocol. The methodology is facile and compatible with aryl bromides, iodides and boronic acids and hence affords broad substrate scope and diversity.
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