title: Strong counteranion effects on the catalytic activity of cationic silicon Lewis acids in Mukaiyama aldol and Diels-Alder reactions.
abstract: [chemical reaction: see text]. A toluene-coordinated silyl borate, [Et3Si(toluene)]B(C6F5)4, demonstrated catalytic activities significantly higher than those of Me3SiOTf and Me3SiNTf2 in Mukaiyama aldol and Diels-Alder reactions.
authors.affiliation: Division of Chemistry, Graduate School of Science, Hokkaido University, Sapporo 060-0810, Japan.
authors.forename: Kenji
authors.initials: K
authors.lastname: Hara
authors.forename: Ryuto
authors.initials: R
authors.lastname: Akiyama
authors.forename: Masaya
authors.initials: M
authors.lastname: Sawamura