Synthesis of gamma-Benzopyranone by TfOH-Promoted Regioselective Cyclization of o-Alkynoylphenols

[摘要]：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.

[全文传递流程]：

一般上传文献全文的时限在1个工作日内