Asymmetric Construction of Bispiro[oxindole-Pyrrolidine-Rhodanine]s via Squaramide-Catalyzed Domino Michael/Mannich [3 + 2] Cycloaddition of Rhodanine Derivatives With N(2,2,2-Trifluoroethyl)isatin Ketimines

doi 10.1021/acs.joc.8b01245.s001