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%).
Vanadium-mediated enantioselective FriedelâCrafts (FC)-type reactions were established using the dinuclear vanadium complex (Ra,S,S)-1a. The vanadium complex promoted the FC-type reaction of imines with 2-naphthols or indoles to give corresponding adducts with high enantioselectivities.