Metal-free synthesis of benzimidazo[2,1-a]ellipticines via tandem inter and intramolecular cyclization

Synthesis of the new benzimidazo[2,1-a]ellipticine derivatives via tandem inter and intramolecular, 5-endo,6-endo cyclization of various 9-ethyl-2-(alkynyl)carbazole-3-carbaldehydes with different 1,2-aryldiamines is reported under metal free condition in good yields.

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