简介：4-(Succinimido)-1-butanesulfonicacidasanefficientandreusableBronstedacidcatalyzedthesynthesisofpyrano[4,3-b]pyranderivativesundersolvent-freeconditions.Thecatalystcanbepreparedbymixingsuccinimideand1,4-butanesultonethatismoresimpleandsaferthanthepreparationofsuccinimidesulfonicacid.Thismethodhastheadvantagesofhighyield,cleanreaction,simplemethodologyandshortreactiontime.Thecatalystcouldberecycledwithoutsignificantlossofactivity.
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![<b style='color:red'>4</b>-（Succinimido）-1-butane sulfonic acid as a Bronsted acid catalyst for synthesis of pyrano[<b style='color:red'>4</b>,3-b]pyran derivatives under solvent-free conditions](/image/thesis0 "<b style='color:red'>4</b>-（Succinimido）-1-butane sulfonic acid as a Bronsted acid catalyst for synthesis of pyrano[<b style='color:red'>4</b>,3-b]pyran derivatives under solvent-free conditions")