CH3 OH H3C\/OCH3 Ht 2 HOCI l3C CH3 H3C OCH3 HaC CH +H3C一C-CN一 H3C CH3 第4页共8页O O CH3MgBr O 2. HO H3C CH3 OH OH H3C C OCH3 H3C OCH3 H+ HO H3C CH3 O O CH3 CH3 + 2 HOCH3 + 3. O + H3C C CH3 OH CN OH HO CN + H3C CH3 O 4. 第 4 页 共 8 页