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