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Asymmetric addition of Grignard reagents to cyclohexenone, catalyzed by ferrocene diphosphanes, afforded chiral magnesium enolates. These enolates reacted in a one‐pot arrangement with N‐benzylidenetoluenesulfonamide to give β‐amino carbonyl compounds with three contiguous stereocenters. Two major diastereoisomers (dr = 60:40) of product with enantioselectivities up to 95 % ee were separated by flash...
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