Benzene → 2-Pyrrolidinone, 5-phenyl-

HRID 1244198Notes

Reaction equation

HRID 1244198 reaction equation
C(O[CH:4]1[NH:9][C:7](=[O:8])[CH2:6][CH2:5]1)C.S(=O)(=O)(O)O.[CH:15]1[CH:20]=[CH:19][CH:18]=[CH:17][CH:16]=1>>[C:15]1([CH:4]2[NH:9][C:7](=[O:8])[CH2:6][CH2:5]2)[CH:20]=[CH:19][CH:18]=[CH:17][CH:16]=1

Participants

4

Reactant 3

HCID 241BenzeneHCID 1118Sulfuric AcidHCID 35805555-Ethoxy-2-pyrrolidinone

Product 1

HCID 956722-Pyrrolidinone, 5-phenyl-Yield 100%

Procedure

At 0° C., 6.45 g of γ-ethoxy-γ-butyrolactam and 50 ml of concentrated sulphuric acid were charged initially, and 18.8 ml of benzene were added. After thawing, the mixture was stirred at room temperature for 4 days. For work-up, the mixture was poured onto ice, extracted three times with ethyl acetate and the combined extracts were washed once with water and once with saturated aqueous sodium chloride solution, dried and evaporated. 8.1 g (100% of theory) of γ-phenyl-γ-butyrolactam were obtained.

Workup

  1. additionFor work-up, the mixture was poured onto ice
  2. extractionextracted three times with ethyl acetate
  3. washthe combined extracts were washed once with water and once with saturated aqueous sodium chloride solution
  4. customdried
  5. customevaporated

Sources & evidence

ORD record
ord-48261d16ef0b4db783d41d8422a6bd07
Source dataset
uspto-grants-2006_10
Patent number
US07122506B2

Reaction notes

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