Abstract
An organocatalytic asymmetric [3 + 2] cycloaddition of trifluoromethyl-containing azomethine ylides with cyclic 2,4-dienones was developed. The process enables efficient incorporation of CF3 groups into functionalized spiro[pyrrolidin-3,2′-oxindoles] in high yields with good to excellent enantio- and diastereoselectivities.
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