Table 1.

One-pot formation of fused benzoselenophenes^a, ^b.

3a 83%	3b 87%	3c 81%
3d 78%	3e 78%	3f 80%
3g 79%	3h 80%	3i 72%
3j 79%	3k 80%	3l 72%
3m 82%	3n 75%	3o 81%
3p 74%	3q 80%

^aReaction scale: 1a–q (1.0 equiv.), triphenylphosphine selenide (1.05 equiv.), 105°C, toluene 1.5 mL.

^bYield of the isolated product after flash column chromatography.