PROCESS FOR THE ELECTROCHEMICAL PREPARATION OF GAMMA-HYDROXYCARBOXYLIC ESTERS AND GAMMA-LACTONES
申请人:Malkowsky Itamar Michael
公开号:US20130053582A1
公开(公告)日:2013-02-28
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.
适用作为香精的γ-羟基羧酸酯和γ-内酯可通过在一个无隔板电解池中,采用铅、铅合金、镉、镉合金、汞、钢、玻璃碳或掺硼金刚石组成的阴极,并且包含一种抑制阴极生成氢的电解质盐的碱性水性电解液中,通过α,β-不饱和酯与羰基化合物的电化学还原交叉偶联制备。