作者:Koichi Mikami、Eiji Sawa、Masahiro Terada
DOI:10.1016/s0957-4166(00)80036-1
日期:1991.1
The chiral binaphthol-derived titanium perchlorate (or triflate) is shown to serve efficiently as an asymmetric catalyst for the ene cyclization of type 3, 4}exo,exo and 2, 4}exo',exo involving alpha-alkoxy aldehyde as an internal enophile to afford the 6- and 7-membered cyclic ethers in high enantiomeric purity.