3-Chlorophenylboronic acid-promoted, one-pot, aza-Friedel–Crafts reaction of indoles

3-Chlorophenylboronic acid promotes efficient synthesis of 3-substituted indole derivatives via aza-Friedel–Crafts reaction of indoles, aromatic aldehydes, and N,N-dimethylaniline at room temperature. The mild reaction conditions, excellent yields, and easy experimental workup are striking features of this procedure for synthesis of 3-substituted indoles.