Erbium(III) Triflate is a Highly Efficient Catalyst for the Synthesis of β-Alkoxy Alcohols, 1,2-Diols and β-Hydroxy Sulfides by Ring Opening of Epoxides
作者:Monica Nardi、Renato Dalpozzo、Manuela Oliverio、Rosina Paonessa、Antonio Procopio
DOI:10.1055/s-0029-1216956
日期:2009.10
ring-opening reaction of epoxides with erbium(III) triflate are described. Epoxides can be cleaved under neutral conditions with alcohols and thiols in the presence of catalytic amounts of Lewis acid, affording the corresponding β-alkoxy alcohols and β-hydroxy sulfides in high yields. In water, epoxide ring opening occurs to produce the corresponding diols in good yields epoxides - Lewis acids - nucleophilic
描述了环氧化物与三氟甲磺酸((III)开环反应中的化学和立体选择性。可以在催化量的路易斯酸存在下,在中性条件下用醇和硫醇裂解环氧化物,以高收率得到相应的β-烷氧基醇和β-羟基硫化物。在水中,发生环氧化物开环以高产率生产相应的二醇 环氧-路易斯酸-亲核加成-开环-绿色化学