Lewis acid-promoted reactions of ethenetricarboxylates with γ-CF3-substituted propargyl alcohols
作者:Shoko Yamazaki、Yuko Yamamoto、Yuji Mikata
DOI:10.1016/j.tet.2009.01.024
日期:2009.3
acid-promoted reaction of an ethenetricarboxylate derivative (1) with CF3-substituted propargylalcohols has been examined. Reaction of γ-CF3 propargylalcohols in the presence of zinc bromide gave five-membered CF3-containing tetrahydrofurans in 66–85% yield. The CF3 group activates alkyne as an electron-withdrawing group. On the other hand, reaction of γ-trifluoromethyl-α-aryl propargylalcohols 2 with