Rajasekaran, T. Karthik, G. Sridhar, B. V. Subba Reddy, B. Dual Behavior of Isatin-Based Cyclic Ketimines with Dicarbomethoxy Carbene: Expedient Synthesis of Highly Functionalized Spirooxindolyl Oxazolidines and Pyrrolines A highly stereo-, regio-, and chemoselective method has been devised for the synthesis of a wide range of spirooxindolyl oxazolidines via an intermolecular 1,3-dipolar cycloaddition of carbonyl ylides generated from dimethyl diazomalonate and aromatic aldehydes, with cyclic ketimines using 5 mol % of Rh<sub>2</sub>(OAc)<sub>4</sub> under mild conditions. Similarly, highly functionalized spirooxindolyl pyrrolines have also been prepared through 1,3-dipolar cycloaddition of azomethine ylides generated from dimethyl diazomalonate and cyclic ketimines, with dimethyl acetylenedicarboxylate. Functionalized Spirooxindolyl Oxazolidines;cycloaddition;dimethyl diazomalonate;dipolar;ylide;cyclic ketimines;functionalized spirooxindolyl pyrrolines 2013-04-05
    https://acs.figshare.com/articles/journal_contribution/Dual_Behavior_of_Isatin_Based_Cyclic_Ketimines_with_Dicarbomethoxy_Carbene_Expedient_Synthesis_of_Highly_Functionalized_Spirooxindolyl_Oxazolidines_and_Pyrrolines/2427196
10.1021/ol400287q.s003