Ruthenium-catalyzed cycloaddition of propargylic alcohols with phenol derivatives via allenylidene intermediates: catalytic use of the allenylidene ligand as the C(3) unit |
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| Authors: | Nishibayashi Yoshiaki Inada Youichi Hidai Masanobu Uemura Sakae |
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| Institution: | Department of Energy and Hydrocarbon Chemistry, Kyoto University, Yoshida, Sakyo-ku, Kyoto 606-8501, Japan. |
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| Abstract: | 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-naphtho2,1-b]pyrans and 4H-1-benzopyrans, respectively, in moderate to excellent yields with complete regioselectivity. |
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