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Updated: Feb 14, 2026

Retropinacol/Cross-pinacol Coupling Reactions - A Catalytic Access to 1,2-Unsymmetrical Diols
Published on: April 4, 2014
Copper-Catalyzed Intramolecular Carbocyclization/1,2-Migration Reaction of Allenols To Access Substituted 2-Sulfonyl
Puja Singh1, Pooja Nain1, Manoj V Mane2
1Department of Chemistry, Indian Institute of Technology Ropar, Rupnagar, Punjab-140001, India.
Abstract:
A copper-catalyzed intramolecular cascade carbocyclization/1,2-migration of C-2 indolyl-allenol has been achieved to construct the library of 2-sulfonyl carbazoles, which possess considerable biological significance. This modular protocol is operationally simple, exhibiting a broad substrate scope with consistently high yields. Additionally, gram-scale synthesis, product diversification of 2-sulfonyl carbazoles, and DFT studies of the catalytic cycle have been performed. Overall, this study unfolds a new strategy for the one-pot synthesis of sulfonyl carbazoles, which holds significance in medicinal and material chemistry.
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