Methyl iodide → HCID 12149490, compound

HRID 1678291Notes

Reaction equation

HRID 1678291 reaction equation
[C:1]([O:5][C:6]([NH:8][C@H:9]([CH2:13][C:14]#[CH:15])[C:10]([OH:12])=[O:11])=[O:7])([CH3:4])([CH3:3])[CH3:2].[C:16](=O)([O-])[O-].[Cs+].[Cs+].CI>CN(C=O)C>[CH3:16][O:11][C:10](=[O:12])[C@H:9]([NH:8][C:6]([O:5][C:1]([CH3:4])([CH3:3])[CH3:2])=[O:7])[CH2:13][C:14]#[CH:15]

Participants

5

Reactant 3

HCID 6328Methyl iodideHCID 10796Cesium carbonateHCID 7009126(2R)-2-(((tert-butoxy)carbonyl)amino)pent-4-ynoic acid

Product 1

HCID 12149490HCID 12149490, compound

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

The commercially available compound, 2-(R)-tert-butoxycarbonylaminopent-4-ynoic acid (0.321 g, 1.50 mmol) was dissolved in anhydrous DMF (5 mL). To the solution was added cesium carbonate (0.54 g, 1.65 mmol) in one portion. The mixture was stirred at room temperature for 45 min before methyl iodide (0.20 mL, 3.00 mmol) was added, and further stirred for three hours. The reaction was quenched with water (10 mL). The organics was extracted with dichloromethane (2×30 mL), washed with water (3×50 mL), and dried over anhydrous sodium sulfate. The solvent was completely removed under vacuum. The residue was further dried under high vacuum over night and used in the next reaction without further purification. The product 23 was obtained as a colorless viscous oil (0.326 g, 95% yield). 1H NMR (300 MHz, CDCl3): δ 1.48 (s, 9H), 2.08 (t, J=2.6 Hz, 1H), 2.75 (t, J=6.3 Hz, 2H), 3.78 (s, 3H), 4.46 (m, 1H), 5.32 (br s, 5H).

Workup

  1. additionwas added
  2. customThe reaction was quenched with water (10 mL)
  3. extractionThe organics was extracted with dichloromethane (2×30 mL)
  4. washwashed with water (3×50 mL)
  5. dry with materialdried over anhydrous sodium sulfate
  6. customThe solvent was completely removed under vacuum
  7. customThe residue was further dried under high vacuum over night
  8. customused in the next reaction without further purification

Sources & evidence

ORD record
ord-99bac9715ce84e47b85c52802f01c084
Source dataset
uspto-grants-2011_08
Patent number
US08008494B2

Reaction notes

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