Asymmetric catalysis by chiral titanium perchlorate for carbonyl-ene cyclization

  • Mikami K
  • Sawa E
  • Terada M
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Abstract

The chiral binaphthol-derived titanium perchlorate (or triflate) is shown to serve efficiently as an asymmetric catalyst for the ene cyclization of type {3,4exo,exo} and {2,4exo′,exo} involving α-alkoxy aldehyde as an internal enophile to afford the 6- and 7- membered cyclic ethers in high enantiomeric purity. © 1991.

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Authors

  • Koichi Mikami

  • Eiji Sawa

  • Masahiro Terada

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