Imidazole → HCID 68806846, compound

HRID 1796307Notes

Reaction equation

HRID 1796307 reaction equation
[C:1]([O:5][C:6]([N:8]1[CH2:12][C@H:11]([OH:13])[CH2:10][C@@H:9]1[C:14]([OH:16])=[O:15])=[O:7])([CH3:4])([CH3:3])[CH3:2].N1C=CN=C1.CN(C1C=CC=CN=1)C.[Si:31](Cl)([C:34]([CH3:37])([CH3:36])[CH3:35])([CH3:33])[CH3:32]>CN(C=O)C.CCOC(C)=O>[C:1]([O:5][C:6]([N:8]1[CH2:12][C@H:11]([O:13][Si:31]([C:34]([CH3:37])([CH3:36])[CH3:35])([CH3:33])[CH3:32])[CH2:10][C@@H:9]1[C:14]([OH:16])=[O:15])=[O:7])([CH3:4])([CH3:2])[CH3:3]

Participants

7

Reactant 4

HCID 795ImidazoleHCID 218852-DimethylaminopyridineHCID 28928tert-Butyldimethylsilyl chlorideHCID 688616N-Boc-cis-4-hydroxy-D-proline

Product 1

HCID 68806846HCID 68806846, compoundYield 84%

Reagents, catalysts & solvents 2

HCID 6228DimethylformamideSolventHCID 8857Ethyl AcetateSolvent

Procedure

(2R,4R)-4-Hydroxy-pyrrolidine-1,2-dicarboxylic acid 1-tert-butyl ester (16 g, 69 mmol) was dissolved in 100 mL DMF, added imidazole (12 g, 173 mmol), dimethylaminopyridine (0.85 g, 6.9 mmol), and tert-butyldimethylsilyl chloride (12.5 g, 83 mmol). Stirred at ambient temperature overnight, dissolved in 350 mL EtOAc, washed with 10% citric acid (3×200 mL), water (2×200 mL), brine, dried with MgSO4, filtered, and concentrated to give 2 (20 g, 84%) APCI (AP−): 344.2 (M−H)−.

Workup

  1. washwashed with 10% citric acid (3×200 mL), water (2×200 mL), brine
  2. dry with materialdried with MgSO4
  3. filtrationfiltered
  4. concentrationconcentrated

Sources & evidence

ORD record
ord-c6a1dd0f1921450fbe0f2ad3d7376d86
Source dataset
uspto-grants-2006_04
Patent number
US07030141B2

Reaction notes

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