Synthesis of 2-hydroxymalonic acid derivatives via tandem oxidation and rearrangement by photo organic catalysis†
Abstract
This report describes a mild method for the direct transformation of β-oxoesters to the corresponding 2-hydroxymalonic esters, tartronic esters, using singlet oxygen produced by a catalytic amount of methylene blue and visible light irradiation using fluorescent lamps. In addition, β-oxoamides were also converted to the corresponding 2-hydroxymalonic ester amides.