Iodolactonisation of heptadienoic acid derivatives 2 and 3 having oxazolidin-2-ones or a sultam as chiral auxiliary gave the chiral iodolactones 4 and 5 in moderate to excellent enantiselectivity.
T. Yokomatsu, H. Iwasawa and S. Shibuya, J. Chem. Soc., Chem. Commun., 1992, 728 DOI: 10.1039/C39920000728
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