Abstract

Synthetic methods: An asymmetric catalytic, desulfonylative Mannich reaction of α-keto imines with aldehydes, as catalyzed by diarylprolinol silyl ether 1, was developed. It gave the Mannich product in good yield with excellent anti and enantioselectivity (see scheme; Boc = tert-butoxycarbonyl, TMS = trimethylsilyl).

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