A novel magnetically heterogeneous nanocatalyst has been successfully synthesized via the immobilization of piperazine on tris (hydroxymethyl) aminomethane-coated Fe3O4 magnetic nanoparticles. The described catalyst was fully characterized by various techniques such as FT-IR, EDS, DTG/TGA, XRD, TEM, SEM, and VSM analyses. The catalytic efficacy of Fe3O4@THAM-piperazine has investigated for one-pot synthesis of tetrahydrobenzo[b]pyran and 1,8-dioxo-octahydro-xanthene derivatives. Notable features of this user-friendly catalytic system include high yields, high catalytic activity, simple operation, non-toxicity, and easy work-up. Also, the new nanocatalyst could be easily recovered and reused for six times without significant loss of activity.
L-Proline has been used as an organocatalyst for an efficient synthesis of 1,8-dioxo-octahydroxanthenes by treatment of aldehydes (aromatic, heteroaromatic, and aliphatic) with 5,5-dimethyl-1,3-cyclohexanedione. Three new compounds have been prepared.
A sustainable gateway to access 1,8-dioxo-octahydroxanthene scaffolds <i>via</i> a surface-engineered halloysite-based magnetically responsive catalyst
作者:Bhavya Arora、Shivani Sharma、Sriparna Dutta、Aditi Sharma、Sneha Yadav、Pooja Rana、Pooja Rana、R. K. Sharma
DOI:10.1039/d1nj05509g
日期:——
contributed towards the innovation of different frontline methodologies for the synthesis of sustainable, low cost and robust catalysts that have aroused scientific interest in the field of heterogeneous catalysis. Enlightened by this objective, an efficient and easily scalable organic–inorganic hybrid magnetically retrievable halloysite nanotube-based copper nanocatalyst was developed via the immobilization