ArticleScientific reports2026
One-pot multicomponent diastereoselective synthesis of indoline spirobicyclics using a recyclable chiral nanomagnetic L-proline catalyst under mild conditions.
Article in Scientific reports, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Fe₃O₄@SiO₂-NH-TCT-(trans-4-hydroxy-L-proline)₂ nanoparticles were synthesized as a chiral, magnetically recoverable nanocatalyst. The material was thoroughly characterized by FT-IR, VSM, XRD, TEM, FE-SEM, BET, CHNS elemental analysis, mass spectrometry, and ¹H/¹³C-NMR. The catalyst enabled a one-pot, multicomponent diastereoselective synthesis of indoline spirobicyclic derivatives from anilines, carbon acids, Fischer's base, and aldehydes under solvent-free conditions at ambient temperature. The method afforded high to excellent yields with excellent diastereoselectivity. Product structures and anti/syn diastereomeric ratios were established by ¹H-, ¹³C-NMR, 2D-ROESY, mass spectrometry, and single-crystal X-ray diffraction.
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