Acetic Acid → HCID 67073393, compound

Participants

Reaction Steps

To a mixture of 5-((S)-1-benzyl-pyrrolidin-3-yloxy)-1H-indole-2-carboxylic acid ethyl ester (18.0 g, 1.0 eq.) and acetic acid (28 mL, 10 eq.) in ethanol (500 mL) was added palladium on activated charcoal (10% in mass, 2.0 g, 0.04 eq.) and the reaction vessel was flushed with hydrogen (1 Atm). The reaction mixture was stirred 18 h at room temperature and then filtered off and concentrated in vacuo. The residue (28.4 g) was dissolved in dimethylformamide (500 mL) and potassium carbonate was added. The mixture was stirred 15 min at room temperature. Then 2-iodopropane (42 g, 5.0 eq.) was added and the mixture was stirred 4 h at 50° C. The reaction mixture was filtered off and the filtrate was evaporated in vacuo. The residue was dissolved in acetone, filtered and the filtrate was evaporated in vacuo then purified on silica eluting with dichloromethane/methanol/ammoniac. One fraction was isolated and dried in vacuo, to yield 9.3 g (59%) of the desired product as light brown solid. MS (m/e): 317.4 (MH+, 100%).

Provenance & Evidence