Treatment of different types of alcohols with tetrahydrofuran (THF) in the presence of VCl3 and CCl4 smoothly afforded the corresponding THF-based acetals in excellent yields. The reaction is fast at room temperature, and several functional groups are tolerated, with no racemization being observed. A radical mechanism, based on Cl3C. as the active species, is proposed for this novel kind of transformation
在
VCl 3和CCl 4的存在下用
四氢呋喃(THF)处理不同类型的醇,以优异的收率平稳地得到相应的基于THF的
缩醛。该反应在室温下快速,并且可以容忍多个官能团,未观察到外消旋化。自由基机理,以Cl 3 Ç 。作为活性物质,有人提出了这种新型的转化方法,该方法可补充经典的四氢-2 H-
吡喃-2-基(THP)方案。