Protection of hydroxy groups as trimethylsilyl ethers catalyzed by magnetically recyclable Schiff-base complexes of ruthenium using HMDS

In this study, a stable and effective magnetically recoverable nanocatalyst was prepared by coating Fe 3O 4 nanoparticles with SiO 2, followed by functionalization with N-(2-aminoethyl)- 3-aminopropyltrimethoxysilane (AEPTMS) and produce Schiff base ligand to linkage Ru(OTf) 2 onto the surface. The nanocatalyst was characterized using various techniques such as FT-IR spectroscopy, SEM, TEM, and VSM to confirm its successful synthesis. The nanocatalyst was used for the trimethylsilylation of various alcohols (primary, secondary, and tertiary alcohols) using hexamethyldisilazane as a silylating agent in dichloromethane at room temperature. The reaction proceeded quickly with a protection time of only 90 seconds, which is a remarkable advantage of this nanocatalyst. The turnover frequency (TOF) values of the catalytic system were estimated to be 1869 h -1. The use of this nanocatalyst offers many advantages, such as excellent yield, catalyst reusability, high acidity, and strong magneticp roperties. These advantages make it a fascinating candidate for green chemistry principles. The simple reprocessing procedure and quick response times are also additional benefits of this nanocatalyst. Overall, this study provides a promising approach for the facile preparation of a stable and effective magnetically recoverable nanocatalyst that can be utilized for the trimethylsilylation of alcohols. The exceptional properties of this catalyst make it an attractive candidate for practical applications in the field of catalysis.

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Opracowanie rekordu ze środków MNiSW, umowa nr POPUL/SP/0154/2024/02 w ramach programu "Społeczna odpowiedzialność nauki II" - moduł: Popularyzacja nauki (2025)