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Abstract
We report the triphenyltin hydride radical mediated cyclization of 4,9-dioxa-1,6-dodecadien-11-yne 2. The reaction proceeds under very mild conditions and in good chemical yield (59%), giving a mixture of products 5 (mixture of isomers in a 1:2 ratio) and 6 (mixture of isomers in a 1:3 ratio).