A visible-light,
single-electron-transfer (SET), photoredox cross-coupling
for the synthesis of α-alkoxyketones has been developed. In
this method, various aliphatic and aromatic acyl chlorides were successfully
coupled with structurally diverse potassium alkoxymethyltrifluoroborates,
producing the corresponding α-alkoxyketones with high yields.
In this operationally simple and mild cross-coupling protocol, the
desired ketones are obtained in one step from bench stable starting
materials by a bond connection that is unique to both alkylboron chemistry
and photoredox/Ni catalysis.
Nanosized sulfated titania was prepared by a sol-gel hydrothermal process. X-ray diffraction (XRD), transmission electron, and scanning electron micrographs (TEM and SEM), FT-IR specific surface area, and BET N(2) adsorption were employed to characterize the properties of the synthesized sulfated TiO(2). The results indicate that both anatase and rutile TiO(2) are obtainable. This prepared sulfated titania showed high catalytic activity in direct amidation of fatty acids as well as benzoic acids with various amines under solvent-free conditions.
The synthesis of a novel class of bisamidines via a copper-catalyzed tandem reaction of trichloroacetonitrile, primary amines, sulfonyl azides, and terminal alkynes is described.
Copper(II) oxide nanoparticles have been synthesized from Cu(OAc)2 via a simple hydrolysis route and were found to be an efficient and inexpensive catalyst for ligand free CS cross‐coupling reactions of malononitrileCS2 adduct with various aryl halides. Aryl iodides and bromides, with electron‐withdrawing as well as electron‐releasing groups on the aromatic ring, undergo coupling reactions in good yields.
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