This work was funded by the Council of Scientific and Industrial Research (CSIR) Project [02(0376)/19/EMR-II] and University Grants Commission (UGC)-Mid Career Award [F-19-230/2018(BSR)], New Delhi.
One-pot synthesis of aryl- as well as heteroaryl-annulated carbazoles was achieved from 2/3-bromomethylindoles involving Lewis acid mediated domino reaction with arenes as well as heteroarenes via successive Friedel–Crafts intermolecular as well as intramolecular alkylations followed by elimination of acetone. Further, the bis-domino reaction of 2,5-bis(bromomethyl)pyrrole was also carried out with selected heteroarenes. Additionally, the synthesized thienocarbazoles and thienodibenzofurans were successfully utilized for a second-generation domino reaction.
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15 CCDC 1812297 (3g) and CCDC 1825263 (10j) contain the supplementary crystallographic data for this paper. The data can be obtained free of charge from The Cambridge Crystallographic Data Centre via www.ccdc.cam.ac.uk/structures.
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