Abstract
A simple, convenient, and promising strategy for the synthesis of 2-ethynyl-3-iodo-benzothiophenes, -benzofurans, and -indoles based on electrophilic cyclization of easily available ortho-functionalized (buta-1,3-diynyl)arenes was developed. The unique potential of using these compounds as starting materials for the synthesis of enediyne systems, containing thiophene, furan, and pyrrole units is demonstrated.
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