[EN] ECO-FRIENDLY METHOD FOR CATALYTIC AERIAL OXIDATION OF ALOE-EMODIN TO RHEINAL<br/>[FR] PROCÉDÉ RESPECTUEUX DE L'ENVIRONNEMENT PERMETTANT L'OXYDATION CATALYTIQUE PAR L'AIR DE L'ALOÉ-ÉMODINE EN RHEINAL
申请人:LUPIN LTD
公开号:WO2011030350A1
公开(公告)日:2011-03-17
A process for preparation of 4,5-Dihydroxy-9,10-dioxo-9,10-dihydro-anthracene-2-carbaldehyde from 1,8-Dihydroxy-3-hydroxymethyl-anthraquinone comprising of aerial oxydation of 1,8-Dihydroxy-3-hydroxymethyl-anthraquinone at oxygen pressure of about 1 to 2 bar in presence of a transition metal complex, a co-catalyst and optionally an oxidizing agent in an organic solvent such as 1,4 dioxane, water or mixtures thereof at a temperature ranging between 25 to 100°C, isolation by appropriate process and optional purification of the product.
一种从1,8-二羟基-3-羟甲基蒽醌制备4,5-二羟基-9,10-二氧代-9,10-二氢蒽-2-甲醛的方法,包括在氧气压力约为1至2巴的条件下,在有过渡金属配合物、辅助催化剂和可选的氧化剂存在下,通过空气氧化1,8-二羟基-3-羟甲基蒽醌,使用有机溶剂如1,4-二氧六环、水或二者的混合物,在温度范围为25至100°C进行,通过适当的工艺进行分离,可选地对产物进行纯化。