A new catalytic system CsF-NaOH was developed for the synthesis of mono- and divinyl ethers of alkanediols exceeding in efficiency KOH. The nucleophilic addition of diols to acetylene in the presence of this system occurs both at enhance pressure (without solvent, 140–160°C) and atmospheric pressure (in DMSO medium, 100°C) of acetylene. Conditions were established of a selective preparation in a high yield of divinyl ethers from diols.
开发了一种新的催化体系CsF-NaOH,用于合成烷二醇的一
乙烯基和
二乙烯基醚,其效率超过了KOH。在该体系存在下,二醇对
乙炔的亲核加成既可以在加压(无溶剂,140-160°C)下进行,也可以在大气压(
DMSO介质,100°C)下进行。建立了从二醇中高收率选择性制备
二乙烯基醚的条件。