Potassium sodium tartarate → (2S,4R)-1-t-butoxycarbonyl-4-(4-chlorophenylsulfonylamino)-2-formylpyrrolidine

HRID 2073253

Reaction equation

HRID 2073253 reaction equation
[C:1]([O:5][C:6]([N:8]1[CH2:12][C@H:11]([NH:13][S:14]([C:17]2[CH:22]=[CH:21][C:20]([Cl:23])=[CH:19][CH:18]=2)(=[O:16])=[O:15])[CH2:10][C@H:9]1[C:24](OC)=[O:25])=[O:7])([CH3:4])([CH3:3])[CH3:2].[H-].C([Al+]CC(C)C)C(C)C.C(C(C(C([O-])=O)O)O)([O-])=O.[Na+].[K+]>C1(C)C=CC=CC=1.O1CCCC1>[C:1]([O:5][C:6]([N:8]1[CH2:12][C@H:11]([NH:13][S:14]([C:17]2[CH:18]=[CH:19][C:20]([Cl:23])=[CH:21][CH:22]=2)(=[O:15])=[O:16])[CH2:10][C@H:9]1[CH:24]=[O:25])=[O:7])([CH3:4])([CH3:3])[CH3:2]

Participants

6

Reactant 3

HCID 9855836Potassium sodium tartarateHCID 14772685(2S,4R)-1-t-butoxycarbonyl-4-(4-chlorophenylsulfonylamino)-2-methoxycarbonylpyrrolidineHCID 21225700Diisobutylaluminumhydride

Product 1

HCID 15670377(2S,4R)-1-t-butoxycarbonyl-4-(4-chlorophenylsulfonylamino)-2-formylpyrrolidineYield 65.9%

Reagents, catalysts & solvents 2

HCID 1140TolueneSolventHCID 8028TetrahydrofuranSolvent

Conditions

Temperature
-78 °C

Procedure

To a solution of (2S,4R)-1-t-butoxycarbonyl-4-(4-chlorophenylsulfonylamino)-2-methoxycarbonylpyrrolidine (9.01 g) in toluene (70 ml) was added dropwise 1.5 molar solution of diisobutylaluminum hydride (61.2 m mol) in tetrahydrofuran (40.8 ml) at -78° C. After the mixture was stirred at -78° C. for 1.5 hours, saturated aqueous potassium sodium tartrate was added to the reaction mixture and the mixture was filtered through Celite. The solid was washed with ethyl acetate and the combined organic solution was washed with brine and dried over magnesium sulfate. The solvent was evaporated in vacuo and the residue was chromatographed on a silica gel column with a mixture of ethyl acetate and n-hexane (1:2-2:1) as an eluent to give (2S,4R)-1-t-butoxycarbonyl-4-(4-chlorophenylsulfonylamino)-2-formylpyrrolidine (5.51 g) as pale yellow crystal.

Workup

  1. filtrationthe mixture was filtered through Celite
  2. washThe solid was washed with ethyl acetate
  3. washthe combined organic solution was washed with brine
  4. dry with materialdried over magnesium sulfate
  5. customThe solvent was evaporated in vacuo
  6. customthe residue was chromatographed on a silica gel column with a mixture of ethyl acetate and n-hexane (1:2-2:1) as an eluent

Sources & evidence

ORD record
ord-1615f33cf72341f1b70f465910f68ced
Source dataset
uspto-grants-1990_04
Patent number
US04916152

Linked notes

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