Triethylamine → (3aR, 7aR)-7,7-Diphenyl-2-[2(2-dimethylaminophenyl)acetyl]perhydro-4-isoindolone

HRID 1029900Notes

Reaction equation

HRID 1029900 reaction equation
[CH3:1][N:2]([CH3:13])[C:3]1[CH:8]=[CH:7][CH:6]=[CH:5][C:4]=1[CH2:9][C:10]([OH:12])=O.Cl.[C:15]1([C:21]2([C:31]3[CH:36]=[CH:35][CH:34]=[CH:33][CH:32]=3)[C@H:29]3[C@H:25]([CH2:26][NH:27][CH2:28]3)[C:24](=[O:30])[CH2:23][CH2:22]2)[CH:20]=[CH:19][CH:18]=[CH:17][CH:16]=1.C(N(CC)CC)C>ClCCl>[C:31]1([C:21]2([C:15]3[CH:20]=[CH:19][CH:18]=[CH:17][CH:16]=3)[C@H:29]3[C@H:25]([CH2:26][N:27]([C:10](=[O:12])[CH2:9][C:4]4[CH:5]=[CH:6][CH:7]=[CH:8][C:3]=4[N:2]([CH3:1])[CH3:13])[CH2:28]3)[C:24](=[O:30])[CH2:23][CH2:22]2)[CH:32]=[CH:33][CH:34]=[CH:35][CH:36]=1

Participants

5

Reactant 3

HCID 8471TriethylamineHCID 204661092-(2-(Dimethylamino)phenyl)acetic acidHCID 22843247(3aR,7aR)-7,7-diphenyl-4-perhydroisoindolone hydrochloride

Product 1

HCID 22843237(3aR, 7aR)-7,7-Diphenyl-2-[2(2-dimethylaminophenyl)acetyl]perhydro-4-isoindoloneYield 38.1%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent2×

Procedure

N,N'-Carbonyldiimidazole (2.43 g) is added to a solution of 2-dimethylaminophenylacetic acid (2.68 g) in dry dichloromethane (50 cc), cooled to +5° C. The mixture is stirred at +5° C. for 90 minutes and a solution of (3aR,7aR)-7,7-diphenyl-4-perhydroisoindolone hydrochloride (4.9 g) and triethylamine (4.2 cc) in dichloromethane (50 cc) is then added. The reaction mixture is stirred at 20° C. for 16 hours, then washed with water (2×100 cc), dried over magnesium sulphate and filtered and the filtrate is concentrated to dryness under reduced pressure (2.7 kPa). The residue is chromatographed on a silica gel column (0.2-0.063 mm, diameter 5 cm, height 50 cm), eluting under a nitrogen pressure of 0.7 bar with a mixture of cyclohexane and ethyl acetate (40/60 by volume) and collecting 125 cc fractions. Fractions 5 to 20 are combined and concentrated to dryness under reduced pressure (2.7 kPa). The residue is crystallized from a mixture of acetonitrile (40 cc) and isopropyl ether (200 cc). The crystals are drained, washed with isopropyl ether and dried. (3aR,7aR)-7,7-diphenyl-2-[2-(2-dimethylaminophenyl)acetyl]-4-perhydroisoindolone (2.58 g) is obtained in the form of white crystals, melting at 190° C.; [α]D20 =-242° (c=1.18, chloroform)

Workup

  1. temperaturecooled to +5° C
  2. stirringThe reaction mixture is stirred at 20° C. for 16 hours
  3. washwashed with water (2×100 cc)
  4. dry with materialdried over magnesium sulphate
  5. filtrationfiltered
  6. concentrationthe filtrate is concentrated to dryness under reduced pressure (2.7 kPa)
  7. customThe residue is chromatographed on a silica gel column (0.2-0.063 mm, diameter 5 cm, height 50 cm)
  8. washeluting under a nitrogen pressure of 0.7 bar
  9. additionwith a mixture of cyclohexane and ethyl acetate (40/60 by volume)
  10. customcollecting 125 cc fractions
  11. concentrationconcentrated to dryness under reduced pressure (2.7 kPa)
  12. customThe residue is crystallized from a mixture of acetonitrile (40 cc) and isopropyl ether (200 cc)
  13. washwashed with isopropyl ether
  14. customdried

Sources & evidence

ORD record
ord-121df7c644ea42449292032619e66571
Source dataset
uspto-grants-1992_04
Patent number
US05102667

Reaction notes

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