Correction: AlCl@ZnO nanostructured material: an efficient green catalyst for the one-pot solvent-free synthesis of 1,4-dihydropyridines.

[This corrects the article DOI: 10.1039/D3RA04277D.].

AlCl@ZnO nanostructured material: an efficient green catalyst for the one-pot solvent-free synthesis of 1,4-dihydropyridines.

AlCl-loaded ZnO nanoparticles have been explored as an efficient catalyst for 1,4-dihydropyridine synthesis under ambient temperature and solvent-free conditions. For this purpose, ZnO nanoparticles were synthesized by a simple solution-based precipitation technique using a stoichiometric amount of zinc sulfate and oxalic acid. The AlCl@ZnO nanocrystalline catalyst was prepared by loading 20% AlCl on ZnO nanoparticles by a simple wet-impregnation technique.

Nanostructured N doped TiO efficient stable catalyst for Kabachnik-Fields reaction under microwave irradiation.

Herein, we report nitrogen-doped TiO (N-TiO) solid-acid nanocatalysts with heterogeneous structure employed for the solvent-free synthesis of α-aminophosphonates through Kabachnik-Fields reaction. N-TiO were synthesized by direct amination using triethylamine as a source of nitrogen at low temperature and optimized by varying the volume ratios of TiCl, methanol, water, and triethylamine, under identical conditions. An X-ray diffraction (XRD) study showed the formation of a rutile phase and the crystalline size is 10 nm.

ZnCl loaded TiO nanomaterial: an efficient green catalyst to one-pot solvent-free synthesis of propargylamines.

One-pot green synthesis of propargylamines using ZnCl loaded TiO nanomaterial under solvent-free conditions has been effectively accomplished. The aromatic aldehydes, amines, and phenylacetylene were reacted at 100 °C in the presence of the resultant catalyst to form propargylamines. The nanocrystalline TiO was initially synthesized by a sol-gel method from titanium(iv) isopropoxide (TTIP) and further subjected to ZnCl loading by a wet impregnation method.