Pyrrolidine → HCID 42643387, compound

Participants

Reaction Steps

17.3 To a stirred solution of 200 mg (2S,4R)-4-[(5-chloro-thiophene-2-carbonyl)-amino]-2-methanesulfonyloxymethyl-pyrrolidine-1-carboxylic acid tert-butyl ester at r.t. in 5 ml THF under an argon atmosphere were added 0.38 ml pyrrolidine. The mixture was heated to reflux for 6 h, then cooled to r.t. and concentrated. The crude product was purified by column chromatography (silica gel, gradient CH2Cl2->CH2Cl2/MeOH 9:1) to give 138 mg (2S,4R)-4-[(5-chloro-thiophene-2-carbonyl)-amino]-2-pyrrolidin-1-ylmethyl-pyrrolidine-1-carboxylic acid tert-butyl ester as off-white amorphous solid. MS 414.4 ([M+H]+)

Provenance & Evidence