Abstract
Abstract A new and regioselective synthesis of 6-oxopyrimidinium-4-olate systems (13–21) is described, involving the 1,3-dipolar cycloaddition of the 1,3-thiazolium-4-olate 12 with arylisocyanates. MNDO and AM1 calculations rationalise the reactivity and regioselectivity experimentally observed.
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