γ-Hydroxycarboxylic esters and γ-lactones which are suitable as flavors can be prepared by electrochemical reductive cross-coupling of α,β-unsaturated esters with carbonyl compounds in an undivided electrolysis cell having a cathode composed of lead, lead alloys, cadmium, cadmium alloys, mercury, steel, glassy carbon or boron-doped diamonds and a basic aqueous electrolyte comprising an electrolyte salt which suppresses the cathodic formation of hydrogen.
                            适用于风味的γ-羟基
羧酸酯和γ-内酯可以通过电
化学还原交叉偶联α,β-不饱和酯与羰基化合物在无隔膜电解池中制备,该电解池具有
铅,
铅合
金,
镉,
镉合
金,
汞,钢,
玻璃碳或掺
硼金刚石制成的阴极和碱性
水电解质,包括一种电解质盐,它抑制阴极形成氢。