1,1'-Carbonyldiimidazole → (3aR,4S,7aR)-7,7-diphenyl-2-[(S)-2-(2-methoxyphenyl)propionyl]-4-perhydroisoindolol

HRID 1721216Notes

Reaction equation

HRID 1721216 reaction equation
C(N1C=CN=C1)(N1C=CN=C1)=O.[CH3:13][O:14][C:15]1[CH:20]=[CH:19][CH:18]=[CH:17][C:16]=1[C@H:21]([CH3:25])[C:22]([OH:24])=O.Cl.[C:27]1([C:33]2([C:43]3[CH:48]=[CH:47][CH:46]=[CH:45][CH:44]=3)[C@H:41]3[C@H:37]([CH2:38][NH:39][CH2:40]3)[C@@H:36]([OH:42])[CH2:35][CH2:34]2)[CH:32]=[CH:31][CH:30]=[CH:29][CH:28]=1>ClCCl>[C:43]1([C:33]2([C:27]3[CH:32]=[CH:31][CH:30]=[CH:29][CH:28]=3)[C@H:41]3[C@H:37]([CH2:38][N:39]([C:22](=[O:24])[C@H:21]([C:16]4[CH:17]=[CH:18][CH:19]=[CH:20][C:15]=4[O:14][CH3:13])[CH3:25])[CH2:40]3)[C@@H:36]([OH:42])[CH2:35][CH2:34]2)[CH:44]=[CH:45][CH:46]=[CH:47][CH:48]=1

Participants

5

Reactant 3

HCID 682631,1'-CarbonyldiimidazoleHCID 11137716(S)-2-(2-Methoxyphenyl)propanoic acidHCID 22856103(3aR,4S,7aR)-7,7-diphenyl-4-perhydroisoindolol hydrochloride

Product 1

HCID 22856101(3aR,4S,7aR)-7,7-diphenyl-2-[(S)-2-(2-methoxyphenyl)propionyl]-4-perhydroisoindololYield 29%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

0.37 g of carbonyldiimidazole is added to a solution, cooled to +4° C., of 0.41 g of (S)-2-(2-methoxyphenyl)propionic acid in 15 cm3 of dry dichloromethane. The mixture is stirred for one hour at +4° C. and then a solution of 0.75 g of (3aR,4S,7aR)-7,7-diphenyl-4-perhydroisoindolol hydrochloride is added. The reaction mixture is stirred at room temperature for 20 hours and then then washed twice with 10 cm3 of water, dried over magnesium sulphate, filtered and concentrated to dryness under reduced pressure (2.7 kPa). The residue is chromatographed on a silica gel column (particle size 0.04-0.06 mm, diameter 3.6 cm, height 37 cm), eluting under a nitrogen pressure of 0.5 bar with an ethyl acetate and cyclohexane mixture (50/50 by volume) and collecting fractions of 50 cm3. Fractions 21 to 41 are pooled and concentrated to dryness under reduced pressure (2.7 kPa). The residue is triturated in isopropyl oxide and then dried. 0.3 g of (3aR,4S,7aR)-7,7-diphenyl-2-[(S)-2-(2-methoxyphenyl)propionyl]-4-perhydroisoindolol is obtained in the form of a white meringue.

Workup

  1. stirringThe reaction mixture is stirred at room temperature for 20 hours
  2. washwashed twice with 10 cm3 of water
  3. dry with materialdried over magnesium sulphate
  4. filtrationfiltered
  5. concentrationconcentrated to dryness under reduced pressure (2.7 kPa)
  6. customThe residue is chromatographed on a silica gel column (particle size 0.04-0.06 mm, diameter 3.6 cm, height 37 cm)
  7. washeluting under a nitrogen pressure of 0.5 bar with an ethyl acetate and cyclohexane mixture (50/50 by volume)
  8. customcollecting fractions of 50 cm3
  9. concentrationconcentrated to dryness under reduced pressure (2.7 kPa)
  10. customThe residue is triturated in isopropyl oxide
  11. customdried

Sources & evidence

ORD record
ord-6f075d4c95444f96844b07103f897281
Source dataset
uspto-grants-1996_04
Patent number
US05508433

Reaction notes

Loading…