Preparation of Silica Nanoparticles from Organic Laboratory Waste of Silica Gel HF(254) and Their Use as a Highly Efficient Catalyst for the One-Pot Synthesis of 2,3-Dihydro-1H-isoindolone Derivatives

[摘要]：Reaction of an isocyanide with an iminium ion intermediate, formed by reaction between 6-formyl-2,3-dimethoxybenzoic acid and secondary amines (dibenzyl-or benzyl(isopropyl) amine) in the presence of silica nanoparticles (silica NPs, ca. 70 nm) proceeds smoothly at room temperature to afford 2,3-dihydro-1H-isoindolone derivatives in high yields.

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