A Stereoconvergent Cyclopropanation Reaction of Styrenes
A.M. del Hoyo, A.G. Herraiz, M.G. Suero
Angew. Chem., Int. Ed., 2016, DOI: 10.1002/anie.201610924

The first stereoconvergent cyclopropanation reaction by means of photoredox catalysis using diiodomethane as the methylene source is described. This transformation exhibits broad functional group tolerance and it is characterized by an excellent stereocontrol en route to trans-cyclopropanes regardless of whether E- or Z-styrene substrates were utilized.