Asymmetric direct vinylogous aldol reaction of furanone derivatives catalyzed by an axially chiral guanidine base.
Department of Chemistry, Graduate School of Science, Tohoku University, Aramaki, Aoba-ku, Sendai 980-8578, Japan.
Hitoshi
H
Ube
Naoki
N
Shimada
Masahiro
M
Terada