Electrocatalytic quantification of quinol in cosmetic samples using Co-doped graphitic carbon nitride @biomolecule assisted electrochemically reduced graphene nanosheets.

A bio-nanocomposite "Co-doped-g-CN@ biomolecule assisted electrochemically reduced graphene nanosheets (Co-g-CN@GN)" was prepared by electrochemical exfoliation of GO from graphite anode in the presence of amino acid 'l-cysteine' followed by its association with Co-g-CN The preparation of material has been confirmed by characterizations with FTIR, XRD, XPS and Raman spectroscopy. The morphology was investigated with TEM and SEM. Further, Co-g-CN@GN modified GC electrode was utilized for detecting and quantifying the 'Quinol' (a skin lightning agent) in cosmetic samples electrochemically.

Metal-free C-H Activation over Graphene Oxide toward Direct Syntheses of Structurally Different Amines and Amides in Water.

Unprecedented metal-free synthesis of a variety of amines and amides is reported via amination of C(sp)-H and C(sp)-H bonds. The strategy involves graphene-oxide/I-catalyzed nitrene insertion using PhINTs as a nitrene (NT) source in water at room temperature. A wide range of structurally different substrates, viz.

Cu(I)-Induced Activation of Furan for Inverse Electron Demand ADAR with Alkenes toward Regioselective Synthesis of Tetrahydropyridine.

The aza-Diels-Alder reaction of various alkenes and formed 1-aza-1,3-dienes from the reaction of furan/pyrrole/thiophene and PhINTs for the regioselective synthesis of tetrahydropyridine (THP) derivatives was realized. The reaction was catalyzed by TpCu as a catalyst under very mild reaction conditions. Structurally different alkenes, along with an alkyne, have been utilized as dienophiles to afford a wide range of different THP derivatives up to 70% yield.