Asymmetric Organocatalytic Aza-Friedel-Crafts Reaction of Naphthols with N-Sulfonyl Imines
作者:Pankaj Chauhan、Swapandeep Singh Chimni
DOI:10.1002/ejoc.201001653
日期:2011.3
The first organocatalyticasymmetric aza-Friedel–Crafts reaction of naphthols with N-sulfonyl imines has been developed. The cupreine-derived bifunctional organocatalyst BzCPN efficiently catalyzes the formation of aza-Friedel–Crafts products in good to excellent yields (up to 99 %) with high enantioselectivities (up to 99.5:0.5 er) under mild reaction conditions, with a low catalyst loading (2–5 mol-%)
An Efficient Synthesis of [(Tosylamino)alkyl]naphthalenols by Nucleophilic Addition of Naphthalen-2-ol with N-Tosyl Imines Using Boron Trifluoride Etherate as Catalyst
[(Tosylamino)alkyl]naphthalenols have efficiently been synthesized by nucleophilic addition of naphthalen‐2‐ol with N‐tosyl imines (derived from both aromatic and aliphatic aldehydes) in the presence of BF3⋅OEt2 as a catalyst at room temperature. The products are formed within 5–9 h in high yields (72–91%).