Table 3.

Investigation of Different Arynes in the Pd-Catalyzed Annulation of o-Halobenzamide 1g^a

entry	aryne	% yield of 3b
1		(3gb) 50
2		(3gc) 46
3		(3gd) 43

^aRepresentative procedure: 1g (0.25 mmol), 2.0 equiv of 2, 5.0 equiv of CsF, 5 mol % Pd(OAc)₂, 10 mol % dppm, 1.0 equiv of Na₂CO₃ in 5 ml of 4:1 toluene/MeCN at 110 °C for 16–24 h.

^bIsolated yield.