Sodium Thiosulfate → (2S,4R)-tert-butyl 4-(6-amino-5-bromopyridin-3-yl)-2-(hydroxymethyl)pyrrolidine-1-carboxylate

HRID 595829Notes

Reaction equation

HRID 595829 reaction equation
[NH2:1][C:2]1[N:7]=[CH:6][C:5]([C@@H:8]2[CH2:12][N:11]([C:13]([O:15][C:16]([CH3:19])([CH3:18])[CH3:17])=[O:14])[C@H:10]([CH2:20][OH:21])[CH2:9]2)=[CH:4][CH:3]=1.C1C(=O)N([Br:29])C(=O)C1.C([O-])(O)=O.[Na+].[O-]S([O-])(=S)=O.[Na+].[Na+]>CC#N.C(OCC)(=O)C>[NH2:1][C:2]1[N:7]=[CH:6][C:5]([C@@H:8]2[CH2:12][N:11]([C:13]([O:15][C:16]([CH3:17])([CH3:18])[CH3:19])=[O:14])[C@H:10]([CH2:20][OH:21])[CH2:9]2)=[CH:4][C:3]=1[Br:29]

Participants

7

Reactant 4

HCID 24477Sodium ThiosulfateHCID 67184N-bromobutanimideHCID 516892Sodium BicarbonateHCID 118045668tert-Butyl (2S,4R)-4-(6-aminopyridin-3-yl)-2-(hydroxymethyl)pyrrolidine-1-carboxylate

Product 1

HCID 118045622(2S,4R)-tert-butyl 4-(6-amino-5-bromopyridin-3-yl)-2-(hydroxymethyl)pyrrolidine-1-carboxylateYield 100%

Reagents, catalysts & solvents 2

HCID 6342AcetonitrileSolventHCID 8857Ethyl AcetateSolvent

Procedure

A solution of (2S,4R)-tert-butyl 4-(6-aminopyridin-3-yl)-2-(hydroxymethyl)pyrrolidine-1-carboxylate (230 mg, 0.784 mmol) in MeCN (10 mL) was treated with NBS (147 mg, 0.823 mmol). After 10 min, the reaction was complete. The reaction was treated with 10 mL 1:1 sat. aq. NaHCO3:sat.aq. Na2S2O3 and the mixture was stirred vigorously for 10 min. The mixture was diluted with ethyl acetate (30 mL) and the layers were separated. The organics were washed with brine, dried over magnesium sulfate and concentrated to provide (2S,4R)-tert-butyl 4-(6-amino-5-bromopyridin-3-yl)-2-(hydroxymethyl)pyrrolidine-1-carboxylate (290 mg, 100% yield). LCMS (m/z): 372.1/374.0 (MH+), 0.55 min.

Workup

  1. customthe layers were separated
  2. washThe organics were washed with brine
  3. dry with materialdried over magnesium sulfate
  4. concentrationconcentrated

Sources & evidence

ORD record
ord-595f013cfaea4ac2a5bb01fa2fe4dc6e
Source dataset
uspto-grants-2016_01
Patent number
US09242996B2

Reaction notes

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