Ammonium Hydroxide → 2-(1,3-dioxo-1,3-dihydro-2H-isoindol-2-yl)-3-phenylpropanamide

HRID 2211250Notes

Reaction equation

HRID 2211250 reaction equation
[C:1]1(=[O:22])[N:5]([CH:6]([CH2:10][C:11]2[CH:16]=[CH:15][CH:14]=[CH:13][CH:12]=2)[C:7](O)=[O:8])[C:4](=[O:17])[C:3]2=[CH:18][CH:19]=[CH:20][CH:21]=[C:2]12.C(N1C=CN=C1)([N:25]1C=CN=C1)=O.[OH-].[NH4+]>O1CCCC1.O>[C:1]1(=[O:22])[N:5]([CH:6]([CH2:10][C:11]2[CH:16]=[CH:15][CH:14]=[CH:13][CH:12]=2)[C:7]([NH2:25])=[O:8])[C:4](=[O:17])[C:3]2=[CH:18][CH:19]=[CH:20][CH:21]=[C:2]12

Participants

6

Reactant 3

HCID 14923Ammonium HydroxideHCID 682631,1'-CarbonyldiimidazoleHCID 227754N-Phthaloyl-DL-phenylalanine

Product 1

HCID 36323402-(1,3-dioxo-1,3-dihydro-2H-isoindol-2-yl)-3-phenylpropanamideYield 84%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 8028TetrahydrofuranSolvent2×

Procedure

To a stirred solution of 2-phthalimido-3-phenylpropionic acid (2.95 g, 10.0 mmol) in tetrahydrofuran (25 mL) are added carbonyldiimidazole (1.62 g, 10.0 mmol) and a few crystals of 4-N,N-dimethylaminopyridine, followed by 15 mL of tetrahydrofuran. The reaction mixture is stirred at room temperature for 45 minutes and 1 mL of concentrated ammonium hydroxide then is added. After 10 minutes, the reaction mixture is diluted with 50 mL water and the resulting slurry is partially concentrated to remove the tetrahydrofuran and filtered. The solid is washed with water and dried in vacuo (60° C., <1 mm) to afford 2.46 g (84%) of 2-phthalimido-3-phenylpropionamide as a white powder: mp 224°-226° C.; 1H NMR (dmso-d6, 250 MHz) δ 7.79 (s, 4 H, Ar), 7.71 (br s, 1 H, CONH2), 7.32 (br s, 1 H, CONH2), 7.20-7.02 (m. 5H, Ar), 5.06-4.98 (m, 1H), 3.56-3.25 (m, 2H); 13C NMR (dmso-d6, 250 MHz) δ: 169.6, 168.0, 137.1, 134.3, 131.2, 129.5, 128.1, 126.3, 122.9, 54.2, 33.7. Anal. Calculated for C17H14N2O3. Theoretical: C, 69.38; H,4.79; N, 9.52. Found: C, 69.37; H, 4.73; N, 9.43.

Workup

  1. waitAfter 10 minutes
  2. concentrationthe resulting slurry is partially concentrated
  3. customto remove the tetrahydrofuran
  4. filtrationfiltered
  5. washThe solid is washed with water
  6. customdried in vacuo (60° C., <1 mm)

Sources & evidence

ORD record
ord-b8af004d321546ee8a8531c2daffa15e
Source dataset
uspto-grants-1995_10
Patent number
US05463063

Reaction notes

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