Novel method for synthesis of unsymmetrical bis(indolyl)alkanes catalyzed by ceric ammonium nitrate (CAN) under ultrasonic irradiation

The reaction of indole with (1H-indol-3-yl)(alkyl) methanol was catalyzed efficiently by ceric ammonium nitrate under ultrasonic irradiation to afford the unsymmetrical bis(indolyl)alkane in good to excellent yields.

The reaction of indole with (1H-indol-3-yl)(alkyl) methanol was efficiently catalyzed by ceric ammonium nitrate (CAN) under ultrasonic irradiation to afford the unsymmetrical bisindolylalkane in good to excellent yields.