Dimethyl Sulfoxide → HCID 59822286, compound

Participants

Reaction Conditions

Reaction Steps

Add 7-chloro-3-(2,2,2-trifluoroacetyl)-6-trifluoromethanesulfonyloxy-2,3,4,5-tetrahydro-1H-benzo[d]azepine (213 g, 500 mmol), triethylamine (118 g, 1150 mmol), palladium(II) acetate (5.6 g, 25 mmol) and 1,3-bis(diphenylphosphino)propane (6.4 g, 15 mmol) to anhydrous DMSO (2.1 L) and ethanol (640 mL) in a 1 gallon autoclave. Inert the autoclave with nitrogen then charge the mixture with carbon monoxide at 50 psi and heat at 100° C. for 2 h (monitor reaction by HPLC). Cool the autoclave to room temperature and add the dark reaction mixture to a flask containing water (3.2 L) and EtOAc (3.2 L). Collect the organic layer and back extract the aqueous layer with EtOAc (2.1 L). Wash the combined organic extracts with water (2.1 L). Concentrate the organic layer in vacuo to a dark oil. Purify the crude mixture by chromatography on silica gel eluting with heptane/EtOAc (5:1) to give the desired intermediate as a pale green oil (144 g, 82%).

Provenance & Evidence