Benzofuran
SMARTS: [*;Br,I;$(*c1ccccc1)]-[c:1]:[c:2]-[OH1:3].[CH1:5]#[C;$(C-[#6]):4]>>[c:1]1:[c:2]-[O:3]-[C:4]=[C:5]-1
Conditions
Reactant 1: halogenated phenol.
Reactant 2: alkyne.
X: I, Br. R1: alkyl, ar.
References
J.-R. Wang, K. Manabe, J. Org. Chem., 2010, 75, 5340-5342.
Other sources
Organic chemistry
Wikipedia