Ruthenium-catalyzed cycloaddition of propargylic alcohols with phenol derivatives via allenylidene intermediates: catalytic use of the allenylidene ligand as the C(3) unit.
Novel ruthenium-catalyzed cycloaddition of propargylic alcohols with 2-naphthols and phenols bearing electron-donating groups via allenylidene intermediates has been developed to give the corresponding 1H-naphtho[2,1-b]pyrans and 4H-1-benzopyrans, respectively, in moderate to excellent yields with complete regioselectivity.
Nishibayashi
Yoshiaki
Y
Department of Energy and Hydrocarbon Chemistry, Kyoto University, Yoshida, Sakyo-ku, Kyoto 606-8501, Japan.
Inada
Youichi
Y
Hidai
Masanobu
M
Uemura
Sakae
S