A new and mild method for the efficient synthesis of 3,3-dichloro-2-sulfonyliminoindolines via AcOH-mediated dichloroimination of indoles using chloramine-B is presented. Application of this method to the efficient construction of pyrrolidinoindoles and N–C3 linked pyrrolidinoindolines is demonstrated.
X. Liu, Q. Hu, Z. Yuan and P. Liu, Org. Biomol. Chem., 2014, 12, 7494 DOI: 10.1039/C4OB01179A
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