An efficient catalytic enantioselective Nazarov cyclization of divinyl ketoesters was developed using a chiral BOX/Cu(II) complex, which provides facile access to a variety of optically active multi-substituted cyclopent-2-enone esters in 78–95% yields with 78–90% ee.
Z. Xu, H. Ren, L. Wang and Y. Tang, Org. Chem. Front., 2015, 2, 811 DOI: 10.1039/C5QO00099H
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