Br[C:2]1[S:15][C:5]2[C:6]3[CH:14]=[N:13][CH:12]=[CH:11][C:7]=3[O:8][CH2:9][CH2:10][C:4]=2[CH:3]=1.[Cl:16][C:17]1[CH:22]=[CH:21][CH:20]=[CH:19][C:18]=1[C:23]#[CH:24].[Cl-].C(N(CC)CC)C>C(#N)C.[Cu]I.O>[Cl:16][C:17]1[CH:22]=[CH:21][CH:20]=[CH:19][C:18]=1[C:23]#[C:24][C:2]1[S:15][C:5]2[C:6]3[CH:14]=[N:13][CH:12]=[CH:11][C:7]=3[O:8][CH2:9][CH2:10][C:4]=2[CH:3]=1
A mixture of 2-bromo-4,5-dihydropyrido[4,3-b]thieno[2,3-d]oxepine (140 mg, 0.5 mmol) from Example 72, 1-chloro-2-ethynylbenzene, 18 mg (0.025 mmol) of bistriphenylphosphinepalladium(II) chloride and 1 ml (7.17 mmol) of triethylamine in 4 ml of acetonitrile was degassed. Copper (I) iodide (2.4 mg, 0.012 mmol) was then added and the mixture was heated at 85° C. for 3 hours. The mixture was mixed with 20 ml of water and extracted with 10 ml of ethyl acetate twice. The combined extracts were washed with 1% aqueous ammonia, water, brine and dried over sodium sulfate. The solution was concentrated in vacuum, the residue purified by flash chromatography eluting with 30% ethyl acetate in hexane to give 2-((2-chlorophenyl)ethynyl)-4,5-dihydropyrido[4,3-b]thieno[2,3-d]oxepine (137 mg, 81%). MS: (ESI+) 338.1
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