Water → tert-Butyl (2R,4R)-4-{[tert-butyl(dimethyl)silyl]oxy}-2-(cyanomethyl)pyrrolidine-1-carboxylate

HRID 602475Notes

Reaction equation

[Si:1]([O:8][C@H:9]1[CH2:13][N:12]([C:14]([O:16][C:17]([CH3:20])([CH3:19])[CH3:18])=[O:15])[C@H:11]([CH2:21]OS(C)(=O)=O)[CH2:10]1)([C:4]([CH3:7])([CH3:6])[CH3:5])([CH3:3])[CH3:2].[C-:27]#[N:28].[Na+].O>CS(C)=O>[Si:1]([O:8][C@H:9]1[CH2:13][N:12]([C:14]([O:16][C:17]([CH3:19])([CH3:18])[CH3:20])=[O:15])[C@H:11]([CH2:21][C:27]#[N:28])[CH2:10]1)([C:4]([CH3:6])([CH3:7])[CH3:5])([CH3:3])[CH3:2]

Participants

Conditions

Temperature: 80 °C

Procedure

The mixture of tert-butyl (2S,4R)-4-{[tert-butyl(dimethyl)silyl]oxy}-2-{[(methylsulfonyl)oxy]methyl}pyrrolidine-1-carboxylate (13.95 g, 32.6 mmol, J. Med. Chem. 1988, 31, 1598-611) and sodium cyanide (3.20 g, 65.2 mmol) in dimethylsulfoxide (100 mL) was stirred at 80° C. for 20 h. After cooling to room temperature, water (200 mL) was added to the mixture. The resulting mixture was extracted with ethyl acetate (400 mL×2). The combined organic layer was washed with water (200 mL), brine (200 mL), dried over sodium sulfate, and concentrated under reduced pressure. The resulting residue was chromatographed on a column of silica gel eluting with n-hexane/ethyl acetate (5:1) to give 7.81 g (70%) of the title compound as a colorless oil.

Workup

temperatureAfter cooling to room temperature
extractionThe resulting mixture was extracted with ethyl acetate (400 mL×2)
washThe combined organic layer was washed with water (200 mL), brine (200 mL)
dry with materialdried over sodium sulfate
concentrationconcentrated under reduced pressure
customThe resulting residue was chromatographed on a column of silica gel eluting with n-hexane/ethyl acetate (5:1)

Sources & evidence

ORD record: ord-70588ff01ed44ac389f7150c5423bcdf
Source dataset: uspto-grants-2011_03
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07906532B2

Reaction notes

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