Microwave-assisted preparation of polysubstituted imidazoles using Zingiber extract synthesized green CrO nanoparticles.

CrO nanoparticles were prepared using Zingiber officinal extract which were used as an efficient and reusable catalyst in the practical synthesis of polysubstituted imidazoles by means of a convenient reaction of aromatic aldehydes with ammonium acetate and benzil under microwave irradiation and HO as solvent. The structure of the compounds was studied by IR and H-NMR spectrum. The most important benefits of this process are operational simplicity, reasonable reaction times, and excellent yield of products.

A facile hydrothermal synthesis of high-efficient NiO nanocatalyst for preparation of 3,4-dihydropyrimidin-2(1H)-ones.

The present work introduces a one-step and facile hydrothermal procedure as a green process for the first time to synthesize nickel(II) oxide (NiO) nanoparticles. The as-prepared nanomaterials were used as high efficient, low toxic and cost catalyst for the synthesis of some organic compounds. Ni(NO) and some natural extract were used as a surfactant for the first time to synthesis NiO nanomaterials.