A process for preparing a heteroaromatic compound having a heteroaromatic nucleus substituted with one or more ether groups comprising the step of: condensing at least one hydroxy-group of a compound having said heteroaromatic nucleus, said at least one hydroxy group (—OH) being substituted at &agr;- or &bgr;-positions with respect to a heteroatom of said heteroaromatic nucleus, with an alcohol containing one or more primary or secondary alcohol groups, optionally substituted with nitro, amide, ester, halogen, cyano or (hetero)aromatic groups, using the redox couple of a triaryl- or trialkylphosphine and an azodioxo-compound at a temperature between −40° C. and 160° C.
制备一种具有杂环芳香核并用一个或多个醚基取代的杂环芳香化合物的方法,包括以下步骤:将具有所述杂环芳香核的化合物中的至少一个羟基与含有一个或多个一级或二级醇基的醇缩合,所述至少一个羟基(—OH)与所述杂环芳香核的杂原子的α-或β-位取代,可选地取代有硝基、酰胺、酯、卤素、
氰基或(杂)芳基的醇,使用三芳基或三烷基膦和偶氮二氧化物的氧化还原偶在-40°C至160°C之间的温度下进行。