Nano n‐propylsulfonated γ‐Al2O3: a new,efficient and reusable catalyst for synthesis of spiro[indoline‐3,4‐pyrazolo[3,4‐e][1,4]thiazepine]diones in aqueous media

Nano n‐propylsulfonated γ‐Al₂O₃ is easily prepared by the reaction of nano γ‐Al₂O₃ with 1,3‐propanesultone. This reagent can be used as an efficient catalyst for the synthesis of spiro [indoline‐3,4‐pyrazolo[3,4‐e][1,4]thiazepine]diones in aqueous media. This new method consistently has the advantages of excellent yields and short reaction times. Further, the catalyst can be reused and recovered several times. Copyright © 2013 John Wiley & Sons, Ltd.     

氨-碘酸盐介质中白喉类毒素的平行催化氢波

在 0 .4mol/LNH3 NH4Cl (pH 8.3 1 )介质中 ,白喉类毒素 (DT)于 - 1 .89V(vs.SCE)处产生的极谱催化氢波可被碘酸钾进一步催化 ,峰电流明显增大 ,但峰电位不变 ,产生一种氢的新动力波 ,建议称其为平行催化氢波。在 0 .4mol/LNH3 NH4Cl(pH 8.3 1 ) - 5 .0× 1 0 - 3 mol/LKIO3介质中 ,DT平行催化氢波的二阶导数峰电流与其浓度在 0 .2 μg/mL～ 1 .0 μg/mL内呈线性关系 ,可用于生物制品中DT含量的测定。