Transformation of dimethyl acetylenedicarboxylate to bis(methylcarboxylate)vinylidene at a diruthenium centre: unprecedented 1,2-migration of a CO2Me group
Abstract
C(CO2Me)2 vinylidene complex in high yield via a 1,2-CO2Me shift within a diruthenacyclopentenone species, a transformation proposed to occur via a zwitterionic μ-cyclopropenyl intermediate stabilised by the Cp*
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