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The catalyzed enantioselective nucleophilic addition of rhodanines has been established by employing isatin‐derived imines as suitable partners under chiral squaramide catalysis. By using this strategy, the resulting 3‐substituted 3‐amino‐2‐oxindoles featuring both rhodanine and vicinal sulfur‐containing tetrasubstituted stereocenters structural motifs were obtained in high yields with excellent enantioselectivities and diastereoselectivities. magnified image
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Huang et al. (2018) studied this question.
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