Acetic Anhydride → (S)-3-(Acetyloxy)-1-[4-(1-pyrrolidinyl)-2-butynyl]-2-pyrrolidinone

HRID 2107974Notes

Reaction equation

HRID 2107974 reaction equation
[OH:1][C@H:2]1[CH2:6][CH2:5][N:4]([CH2:7][C:8]#[C:9][CH2:10][N:11]2[CH2:15][CH2:14][CH2:13][CH2:12]2)[C:3]1=[O:16].[C:17](OC(=O)C)(=[O:19])[CH3:18]>ClCCl>[C:17]([O:1][C@H:2]1[CH2:6][CH2:5][N:4]([CH2:7][C:8]#[C:9][CH2:10][N:11]2[CH2:12][CH2:13][CH2:14][CH2:15]2)[C:3]1=[O:16])(=[O:19])[CH3:18]

Participants

4

Reactant 2

HCID 7918Acetic AnhydrideHCID 15046675(S)-3-hydroxy-1-[4-(1-pyrrolidinyl)-2-butynyl]-2-pyrrolidinone

Product 1

HCID 15046668(S)-3-(Acetyloxy)-1-[4-(1-pyrrolidinyl)-2-butynyl]-2-pyrrolidinone

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

A solution of 0.4 g of (S)-3-hydroxy-1-[4-(1-pyrrolidinyl)-2-butynyl]-2-pyrrolidinone and 1.0 ml of acetic anhydride in 20 ml of dichloromethane was stirred overnight. The solvent was removed in vacuo. The residue was basified with potassium bicarbonate solution and extracted with dichloromethane. The dichloromethane solution was washed with water, dried, concentrated in vacuo and the residue was purified by chromatography (alumina), giving the desired product.

Workup

  1. customThe solvent was removed in vacuo
  2. extractionextracted with dichloromethane
  3. washThe dichloromethane solution was washed with water
  4. customdried
  5. concentrationconcentrated in vacuo
  6. customthe residue was purified by chromatography (alumina)

Sources & evidence

ORD record
ord-3d9ecf033ce64815b772183991944a65
Source dataset
uspto-grants-1990_06
Patent number
US04937235

Reaction notes

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