Nickel-Doped Decatungstate as a Robust Photocatalyst for Violet Light-Triggered Redox Coupling Conversion of Alcohol and Water to Aldehyde/Ketone and Hydrogen.

The effective coupling of photoinduced alcohol oxidation and water reduction may economically produce hydrogen (H) from water, which is of great significance in solving the current energy crisis. This study discloses that decatungstate (DT) and especially Niions-doped DTs are active for the photoreaction of benzyl alcohol with HO, and under 48 h of violet light illumination, the best 1%Ni-DT yields ca. 86.

AgNTf-catalyzed formal [3 + 2] cycloaddition of ynamides with unprotected isoxazol-5-amines: efficient access to functionalized 5-amino-1-pyrrole-3-carboxamide derivatives.

A formal [3 + 2] cycloaddition between ynamides and unprotected isoxazol-5-amines has been developed in the presence of catalytic AgNTf in an open flask. By the protocol, a variety of functionalized 5-amino-1-pyrrole-3-carboxamide derivatives can be obtained in up to 99% yield. The reaction mechanism might involve the generation of an unusual α-imino silver carbene intermediate (or a silver-stabilized carbocation) and subsequent cyclization/isomerization to build the significant pyrrole-3-carboxamide motif.