Synthesis of γ-Benzopyranone by TfOH-Promoted Regioselective Cyclization of <i>o</i>-Alkynoylphenols
作者:Masahito Yoshida、Yuta Fujino、Takayuki Doi
DOI:10.1021/ol2016934
日期:2011.9.2
Regioselective cyclization of o-alkynoylphenols forming gamma-benzopyranones has been demonstrated. Trifluoromethanesulfonic acid (TfOH) induced 6-endo cyclization of o-alkynoylphenols without forming 5-exo cyclized benzofuranone derivatives to provide the corresponding gamma-benzopyranones in high yields.
Synthesis of Aurones through Silver-catalyzed Intramolecular Cyclization from <i>o</i>
-Alkynonylphenols
作者:Woonsang Hwang、Hyunseok Kim、Hyuck Choi、Jaehyun Kim、Woo Hyung Jeon、Phil Ho Lee、Kooyeon Lee