反应详情

83 mg (0.139 mmol) of (3S,4S)-3-[3-(4-methanesulfonyl-benzyl)-2,4-dioxo-1,3,8-triaza-spiro[4.5]dec-8-ylmethyl]-4-phenyl-pyrrolidine-1-carboxylic acid tert-butyl ester was dissolved in 3 mL of DCM and 1 mL of TFA and the solution was stirred overnight. The mixture was then evaporated to dryness and the residue was redissolved in 2 mL of toluene and evaporated again at 40° C. The crude compound was then dissolved in 5 mL of 5% methanol in DCM and filtered through a ChemElute™ loaded with 1 mL of 2 M NaOH. The filtrate was evaporated to yield 3-(4-methanesulfonyl-benzyl)-8-((3R,4S)-4-phenyl-pyrrolidin-3-ylmethyl)-1,3,8-triaza-spiro[4.5]decane-2,4-dione (52.1 mg, 76%).

1. customThe mixture was then evaporated to dryness
2. dissolutionthe residue was redissolved in 2 mL of toluene
3. customevaporated again at 40° C
4. dissolutionThe crude compound was then dissolved in 5 mL of 5% methanol in DCM
5. filtrationfiltered through a ChemElute™
6. customThe filtrate was evaporated