4-Chlorobenzenesulfonyl chloride → (2S,4R)-1-t-butoxycarbonyl-4-(4-chlorophenylsulfonylamino)-2-methoxycarbonylpyrrolidine

HRID 439404Notes

Reaction equation

HRID 439404 reaction equation
[NH2:1][C@H:2]1[CH2:6][N:5]([C:7]([O:9][C:10]([CH3:13])([CH3:12])[CH3:11])=[O:8])[C@H:4]([C:14]([O:16][CH3:17])=[O:15])[CH2:3]1.C(N(CC)CC)C.[Cl:25][C:26]1[CH:31]=[CH:30][C:29]([S:32](Cl)(=[O:34])=[O:33])=[CH:28][CH:27]=1>ClCCl>[C:10]([O:9][C:7]([N:5]1[CH2:6][C@H:2]([NH:1][S:32]([C:29]2[CH:30]=[CH:31][C:26]([Cl:25])=[CH:27][CH:28]=2)(=[O:34])=[O:33])[CH2:3][C@H:4]1[C:14]([O:16][CH3:17])=[O:15])=[O:8])([CH3:11])([CH3:12])[CH3:13]

Participants

5

Reactant 3

HCID 73984-Chlorobenzenesulfonyl chlorideHCID 8471TriethylamineHCID 70099181-tert-butyl 2-methyl (2S,4R)-4-aminopyrrolidine-1,2-dicarboxylate

Product 1

HCID 14772685(2S,4R)-1-t-butoxycarbonyl-4-(4-chlorophenylsulfonylamino)-2-methoxycarbonylpyrrolidineYield 88.2%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

To a solution of (2S,4R)-4-amino-1-t-butoxycarbonyl-2-methoxycarbonylpyrrolidine (6.04 g) in dichloromethane (60 ml) were added triethylamine (3.44 ml) and p-chlorobenzenesulfonyl chloride (6.26 g) in an ice bath. After being stirred at room temperature overnight, the solution was washed successively with diluted hydrochloric acid, saturated aqueous sodium bicarbonate and brine and dried over magnesium sulfate. The solvent was evaporated in vacuo and the residue was crystallized from n-hexane to give (2S,4R)-1-t-butoxycarbonyl-4-(4-chlorophenylsulfonylamino)-2-methoxycarbonylpyrrolidine (9.13 g) as a pale yellow crystal.

Workup

  1. washthe solution was washed successively with diluted hydrochloric acid, saturated aqueous sodium bicarbonate and brine
  2. dry with materialdried over magnesium sulfate
  3. customThe solvent was evaporated in vacuo
  4. customthe residue was crystallized from n-hexane

Sources & evidence

ORD record
ord-d8ace17f58a24d7bacc7e05d63b50c44
Source dataset
uspto-grants-1996_05
Patent number
US05514701

Reaction notes

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