Asymmetric catalysis by chiral titanium perchlorate for carbonyl-ene cyclization
摘要:
The chiral binaphthol-derived titanium perchlorate is shown to serve efficiently as an asymmetric catalyst for the ene cyclization of type I and II involving alpha-alkoxy aldehyde as an internal enophile to afford the 6- and 7-membered cyclic ethers in high enantiomeric purity.
Asymmetric catalysis by chiral titanium perchlorate for carbonyl-ene cyclization
摘要:
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.
作者:Melissa L. Grachan、Matthew T. Tudge、Eric. N. Jacobsen
DOI:10.1002/anie.200704439
日期:2008.2.8
Asymmetric catalysis by chiral titanium perchlorate for carbonyl-ene cyclization
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.