The chiral squaramide catalysts (8–15) were synthesized, and their catalytic efficiency in the enantioselective conjugate addition of pyrazolones to nitroalkenes was described. This protocol provides excellent chemical yields (up to 93%) of chiral 5‐methyl‐4‐(2‐nitro‐1‐arylethyl)pyrazol‐3‐ol derivatives with high enantioselectivities (up to 97% ee).
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