Propargylamines were synthesized in excellent yields from cyclohexanone and pentanone with a variety of secondary amines and alkynes by employing a new polystyrene supported N-phenylpiperazine–Cu(ii) complex 4c.

A new, heterogeneous, polymer‐supported copper(II) complex was prepared and characterized using various techniques, including Fourier transform infrared spectroscopy, scanning electron microscopy, energy dispersive X‐ray spectroscopy, atomic absorption spectroscopy and thermogravimetric analysis. This heterogeneous copper catalyst is efficient for the synthesis of propargylamines via a three‐component coupling reaction of aldehydes, amines and alkynes. The effect of solvent on the coupling reactions was investigated. Further, the catalyst can be easily recovered quantitatively by simple filtration and reused for a minimum number of cycles without significant loss of its catalytic activity. Copyright © 2014 John Wiley & Sons, Ltd.

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We describe a copper(I) catalyzed ortho‐chlorination of aromatic compounds via direct C−H activation by using hypervalent iodine reagent 1‐chloro‐1,2‐benziodoxol‐3‐one. This reaction showed high regioselectivity for the monochlorination of the C−H bonds of 2‐phenyl pyridines and was compatible for a wide range of nitrogen‐containing aromatics. Furthermore, the synthesized iodine(III) reagent was highly stable, recyclable, and can be employed in large‐scale syntheses of halo‐heteroarenes.