HA Zeolite as a Recyclable Catalyst for the Green Synthesis of Aryl naphthoxazinone Derivatives

HA Zeolite as a Recyclable Catalyst for the Green Synthesis of Aryl naphthoxazinone Derivatives

An efficient green procedure for the preparation of aryl naphthoxazinones, applying a three-component one-pot condensation reaction of 2-naphthol, aromatic aldehyde and urea in the presence of HA zeolite under heating conditions in dimethyl sulfoxide has been developed. The present procedure offers several advantages such as short reaction time, simple workup and moderate to high yields, recovery and reusability of the catalyst. ...

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A nanotube catalyst efficient and reusable for epoxidation

A nanotube catalyst efficient and reusable for epoxidation

In the present work, the preparation, characterization and investigation of catalytic activity of tungsten hexacarbonyl, W(CO)8, supported on multi-wall carbon nanotubes modified with 1-aminopyridine is reported. The catalyst, [W(CO)5@Apy-MWCNT], was characterized by physico-chemical and spectroscopic methods. The prepared catalyst was applied as an efficient catalyst for green epoxidation of alkenes with hydrogen peroxide in CH4CN as solvent. This heterogeneous metal carbonyl catalyst showed ...

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