A new route to prepare tetrahydrothiophene derivatives from D–A cyclopropanes and β-oxodithioesters catalyzed by Yb(OTf)3 is reported. This is the first example using β-oxodithioesters as dipolarophiles to react with D–A cyclopropanes. The method exhibits good regioselectivity.
![Graphical abstract: Yb(OTf)3 catalyzed [3 + 2] annulations of D–A cyclopropanes with β-oxodithioesters: a regioselective synthesis of tetrahydrothiophenes](/en/Image/Get?imageInfo.ImageType=GA&imageInfo.ImageIdentifier.ManuscriptID=C5RA06355H&imageInfo.ImageIdentifier.Year=2015)
S. Wang, W. Guo, L. Wen and M. Li, RSC Adv., 2015, 5, 47418 DOI: 10.1039/C5RA06355H
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