Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1321571 | Journal of Organometallic Chemistry | 2013 | 8 Pages |
•Introducing new solid phase catalyst for organic transformations.•Characterization and application of TiO2-Pr-SO3H for N-tert-butoxycarbonylation of amines.•Catalysis under solvent-free conditions at room temperature.•Generality of method, high yields, short reaction times and recyclability of the catalyst.
Sulfonic acid-functionalized nanoporous titania (TiO2-Pr-SO3H) was prepared from the reaction of (3-mercaptopropyl) trimethoxysilane and TiO2, then by oxidation of thiols group with hydrogen peroxide. The morphology and acidity of synthesized catalyst was characterized by FT-IR, SEM, TEM, TGA and XRD techniques and Hammett acidity test. The catalytic performance of TiO2-Pr-SO3H was investigated in the N-tert-butoxycarbonylation of amines under solvent-free conditions at room temperature. Our novel method is mild, chemoselective and has the advantages such as heterogeneous catalysis, low cost and the recyclability of the catalyst.
Graphical abstractSulfonic acid-functionalized nanoporous titania (TiO2-Pr-SO3H) was prepared from the reaction of (3-mercaptopropyl) trimethoxysilane and TiO2. The morphology and acidity of synthesized catalyst was characterized by various techniques and the catalytic performance of TiO2-Pr-SO3H was investigated in the N-tert-butoxycarbonylation of amines under solvent-free conditions.Figure optionsDownload full-size imageDownload as PowerPoint slide