Nano-copper(0) stabilized on alumina prepared from Cu-Al hydrotalcite has been reported for completely regioselective synthesis of 2,4-disubstituted pyrroles from unactivated terminal aromatic/aliphatic alkynes and isocyanides. The reaction is operationally simple, involves ligand-free inexpensive nano-copper, and affords products in high yields.
An efficient and mild method for the synthesis of 4,5-di-substituted oxazolesvia[3 + 2] cycloaddition reaction of isocyanides and acid chlorides is reported.
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