反应详情

To a stirred solution of (2S,4S)-4-amino-1-cyclohexylmethyl-pyrrolidine-2-carboxylic acid methyl ester (150 mg, 0.62 mmol) and 1-hydroxy-naphthalene-2-carboxylic acid (90 mg, 0.75 mmol) in DMF (2 mL) were added HATU (285 mg, 0.75 mmol) and N,N-diisopropylethylamine (96 mg, 0.75 mmol). The mixture was stirred at room temp. for 24 h. The reaction mixture was then extracted with ethyl acetate and washed with water and brine. The organic layer was then dried over anhydrous sodium sulfate, concentrated and purified by column chromatography to give (2S,4S)-1-cyclohexylmethyl-4-[(1-hydroxy-naphthalene-2-carbonyl)-amino]-pyrrolidine-2-carboxylic acid methyl ester. MS calcd. for C24H31N2O4 [(M+H)4] 411.0, obsd. 411.0.

1. extractionThe reaction mixture was then extracted with ethyl acetate
2. washwashed with water and brine
3. dry with materialThe organic layer was then dried over anhydrous sodium sulfate
4. concentrationconcentrated
5. custompurified by column chromatography