A EuIII/EuII photoredox system in alcohol induced an effective hydroxyalkylation at an α-position of a dialkyl malonate. The alcohol adduct was then converted to the lactone. A step-by-step hydroxyalkylation mechanism was suggested in which the Eu ion is used as a photocatalyst and also as a condensation catalyst for the reaction of dialkyl malonates and aldehydes.
在醇中,EuIII/EuII光氧化还原体系有效地诱导了双烷基
丙二酸酯α位的羟基烷基化。然后将醇加成物转化为内酯。建议了一种逐步的羟基烷基化机制,其中Eu离子既作为光催化剂,又作为双烷基
丙二酸酯与醛反应的缩合催化剂。