Abstract
A series of diverse heterocycles containing spirooxindole, isoxazoline/triazole, and isoxazole rings has been synthesized via an efficient three‐component reaction of (E)‐2‐(1‐propargyl‐2‐oxoindoline‐3‐ylidene)acetophenones 1, arylnitrile oxides 2, and arylazides 3 using Cu(I) as catalyst. The regiochemistry and stereochemistry of cycloadducts 4a and 5a have been confirmed by X‐ray diffraction studies. The heterocycles were screened against Gram‐positive and Gram‐negative bacteria and fungi. Several compounds exhibit moderate to excellent activities comparable to those of established standard drugs.
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