RT info:eu-repo/semantics/article T1 Organocatalytic Enantioselective Synthesis of Oxindole‐4‐Aminopyrazolone Derivatives via Mannich Reaction of 3‐Substituted Oxindoles With Pyrazolinone Ketimines A1 Molinero, María E. A1 Tejedor, Sandra A1 Martín Maroto, Laura A1 Maestro Fernández, Alicia A1 Andrés García, José María K1 Organocatálisis asimétrica K1 Adición de Mannich K1 Oxindol K1 Cetiminas derivadas de pirazolinona K1 Centros estereogénicos cuaternarios AB The organocatalyzed Mannich reaction between pyrazolinone ketimines and 3-aryl-substituted oxindoles mediated by a hidroquinine-derived squaramide is reported. This method enables the synthesis of a diverse set of oxindole-4-aminopyrazolone derivatives bearing vicinal tetrasubstituted stereocenters, affording products in good yields (up to 95%), with excellent diastereoselectivity (> 20:1) and moderate enantioselectivity (up to 85:15 er) under mild conditions. PB Wiley SN 0022-152X YR 2025 FD 2025 LK https://uvadoc.uva.es/handle/10324/78449 UL https://uvadoc.uva.es/handle/10324/78449 LA eng NO Journal of Heterocyclic Chemistry, 2025, vol. 62, p. 496-504. NO Producción Científica DS UVaDOC RD 10-oct-2025