Acid catalyzed condensation of levulinic acid with glyoxylic acid: synthesis of 1-methyl-2,8-dioxabicyclo[3.3.0]oct-4-ene-3,7-dione
作者:Ananda S. Amarasekara、Uyen Ha
DOI:10.1016/j.tetlet.2016.04.103
日期:2016.6
The sulfuric acid catalyzed condensation of levulinic acid with glyoxylic acid at 80 °C, for 24 h under neat conditions gives 1-methyl-2,8-dioxabicyclo[3.3.0]oct-4-ene-3,7-dione in 92% yield. Catalytic reduction of this unsaturated bis-lactone provides a facile route to produce polyester monomer 1-methyl-2,8-dioxabicyclo[3.3.0]octane-3,7-dione from renewable feedstocks.
在纯净条件下,在80°C的硫酸催化下乙酰丙酸与乙醛酸的缩合反应24小时,在92℃下得到1-甲基-2,8-二氧杂双环[3.3.0] oct-4-ene-3,7-二酮% 让。该不饱和双内酯的催化还原提供了从可再生原料生产聚酯单体1-甲基-2,8-二氧杂双环[3.3.0]辛烷-3,7-二酮的简便途径。