Chloride → 2-((2-Chlorophenyl)ethynyl)-4,5-dihydropyrido[4,3-b]thieno[2,3-d]oxepine

Participants

Reaction Conditions

Reaction Steps

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

Provenance & Evidence