Highly Efficient Synthesis of Diverse Spirooxindoles Using DBU‐Based Ionic Liquid Catalyst
1,8‐Diazabicyclo [5.4.0] undec‐7‐ene (DBU) supported ionic liquids (ILs) demonstrate potential catalytic performance and excellent basicity in organic reactions. Among diverse ionic liquids, DBU acetate (DBU[OAc]) stands out as an adaptable protic ionic liquid (PIL) and has been reported as a low‐volatile and stable...