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In this communication, an efficient asymmetric aminoalkylation of 5‐aminopyrazole derivatives with cyclic benzoxathiazine 2,2‐dioxides catalyzed by a quinine‐derived squaramide in dichloromethane has been established. This is the first example of 5‐aminopyrazole derivatives in asymmetric catalysis. A variety of chiral sulfamidates bearing an aminopyrazole moiety were obtained in good yields (up to...
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