2-Bromopropane → Methyl 3-cyano-4-isopropoxybenzoate

HRID 222908Notes

Reaction equation

HRID 222908 reaction equation
[C:1]([C:3]1[CH:4]=[C:5]([CH:10]=[CH:11][C:12]=1[OH:13])[C:6]([O:8][CH3:9])=[O:7])#[N:2].Br[CH:15]([CH3:17])[CH3:16].C(=O)([O-])[O-].[K+].[K+]>CN(C=O)C>[C:1]([C:3]1[CH:4]=[C:5]([CH:10]=[CH:11][C:12]=1[O:13][CH:15]([CH3:17])[CH3:16])[C:6]([O:8][CH3:9])=[O:7])#[N:2]

Participants

5

Reactant 3

HCID 63582-BromopropaneHCID 11430Potassium CarbonateHCID 11769089Methyl 3-cyano-4-hydroxybenzoate

Product 1

HCID 21956805Methyl 3-cyano-4-isopropoxybenzoateYield 99%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Conditions

Temperature
90 °C

Procedure

Methyl 3-cyano-4-hydroxybenzoate 3 (18 g, 0.1 mol) was dissolved in 100 mL of DMF and treated with 14.2 mL (0.15 mol) of 2-bromopropane and 41.9 g (0.3 mol) of anhydrous potassium carbonate. The system was flushed with nitrogen, and the mixture was heated to 90° C. with stirring overnight. After cooling to room temperature, the mixture was diluted with 200 mL of water and extracted with CH2Cl2 (2×200 mL). The combined organic layers were dried over sodium sulfate, filtered and evaporated to dryness to give 20.5 g (99% yield) of 4 as an oil that was characterized by LCMS and HNMR.

Workup

  1. customThe system was flushed with nitrogen
  2. temperatureAfter cooling to room temperature
  3. additionthe mixture was diluted with 200 mL of water
  4. extractionextracted with CH2Cl2 (2×200 mL)
  5. dry with materialThe combined organic layers were dried over sodium sulfate
  6. filtrationfiltered
  7. customevaporated to dryness

Sources & evidence

ORD record
ord-c768d1193abc4b96b81fffa62872efef
Source dataset
uspto-grants-2012_06
Patent number
US08207340B2

Reaction notes

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