Triethylamine → 3-tert-butoxycarbonyl-7-chloro-6-[5-(4-fluorophenylethynyl)-pyridin-2-ylmethylthio]-2,3,4,5-tetrahydro-1H-benzo[d]azepine

Participants

Reaction Conditions

Reaction Steps

Dissolve 3-tert-butoxycarbonyl-6-(5-bromopyridin-2-ylmethylthio)-7-chloro-2,3,4,5-tetrahydro-1H-benzo[d]azepine (1.0 g, 2.07 mmol), tetrakistriphenylphosphine palladium(0) (120 mg, 0.104 mmol), cuprous iodide-(20 mg, 0.105 mmol), triethylamine (2.60 mL) and 1-ethynyl-4-fluorobenzene (500 mg, 4.16 mmol) in DMF (8 mL). Degas the mixture, purge with nitrogen, and heat at 65° C. for 3 days. Dilute the mixture with water, extract three times with EtOAc, dry over anhydrous Na2SO4, and concentrate in vacuo. Purify by chromatography on silica gel eluting with hexane/EtOAc (50:1) to give 3-tert-butoxycarbonyl-7-chloro-6-[5-(4-fluorophenylethynyl)-pyridin-2-ylmethylthio]-2,3,4,5-tetrahydro-1H-benzo[d]azepine as a tan foam (1.02 g, 95%). MS (APCI+) m/z: 523 (M+H)+, 423 (M+H−Boc)+. Use a method similar to the General Procedure 14 to give the title compound as a tan powder. MS (APCI+) m/z: 423 (M+H)+.

Provenance & Evidence