摘要：

New mission for prolinol ethers: A secondary-amine-catalyzed Michael addition of N-Boc-protected oxindoles to nitroalkenes through a Brnsted base activation mode has been developed, furnishing the products in excellent yields (88-98%), diastereoselectivities (d.r.=98:2->99:1) and high to excellent enantioselectivities (82->99%ee; see scheme).

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