4-Toluenesulfonyl chloride → tert-butyl (3R,4R)-3-(4-tert-butoxy-benzoylamino)-4-hydroxy-azepan-1-carboxylate

HRID 895263Notes

Reaction equation

HRID 895263 reaction equation
C1(C)C=CC(S(Cl)(=O)=O)=CC=1.[C:12]([O:16][C:17]1[CH:25]=[CH:24][C:20]([C:21]([OH:23])=O)=[CH:19][CH:18]=1)([CH3:15])([CH3:14])[CH3:13].[NH2:26][C@H:27]1[C@H:33]([OH:34])[CH2:32][CH2:31][CH2:30][N:29]([C:35]([O:37][C:38]([CH3:41])([CH3:40])[CH3:39])=[O:36])[CH2:28]1>ClCCl.CN(C)C1C=CN=CC=1.CCCCCCC>[C:12]([O:16][C:17]1[CH:18]=[CH:19][C:20]([C:21]([NH:26][C@H:27]2[C@H:33]([OH:34])[CH2:32][CH2:31][CH2:30][N:29]([C:35]([O:37][C:38]([CH3:41])([CH3:40])[CH3:39])=[O:36])[CH2:28]2)=[O:23])=[CH:24][CH:25]=1)([CH3:13])([CH3:14])[CH3:15]

Participants

7

Reactant 3

HCID 73974-Toluenesulfonyl chlorideHCID 5353024-tert-Butoxybenzoic AcidHCID 10398972(3R,4R)-tert-Butyl 3-amino-4-hydroxyazepane-1-carboxylate

Product 1

HCID 53982438tert-butyl (3R,4R)-3-(4-tert-butoxy-benzoylamino)-4-hydroxy-azepan-1-carboxylate

Reagents, catalysts & solvents 3

HCID 142844-(Dimethylamino)pyridineCatalystHCID 6344DichloromethaneSolvent3×HCID 8900HeptaneSolvent

Procedure

12.91 g of p-toluenesulphonyl chloride dissolved in 15 ml of dichloromethane were added at room temperature in the course of 15 minutes to 1.94 g of 4-(tert-butoxy)-benzoic acid and 2.63 g of 4-dimethylaminopyridine in 20 ml of dichloromethane. The reaction mixture was stirred for 2 hours and added in the course of 1 hour to 2.30 g of tert-butyl (3R,4R)-3-amino-4-hydroxy-azepan-1-carboxylate dissolved in 10 ml of dichloromethane. After stirring for 1 hour the reaction mixture was washed with 20 ml of 1N NaOH, 20 ml of 1N HCl and 20 ml of water. All aqueous phases were washed in succession with 10 ml of dichloromethane. The combined organic phases were dried over sodium sulphate, filtered and the solvent was evaporated. The foam-like residue obtained was dissolved in 80 ml of hot heptane and crystallized at room temperature overnight. The crystals were washed with 10 ml of heptane and dried to yield 3.23 g of tert-butyl (3R,4R)-3-(4-tert-butoxy-benzoylamino)-4-hydroxy-azepan-1-carboxylate, m.p. 134-135° C.

Workup

  1. stirringAfter stirring for 1 hour the reaction mixture
  2. washwas washed with 20 ml of 1N NaOH, 20 ml of 1N HCl and 20 ml of water
  3. washAll aqueous phases were washed in succession with 10 ml of dichloromethane
  4. dry with materialThe combined organic phases were dried over sodium sulphate
  5. filtrationfiltered
  6. customthe solvent was evaporated
  7. customThe foam-like residue obtained
  8. customcrystallized at room temperature overnight
  9. washThe crystals were washed with 10 ml of heptane
  10. customdried

Sources & evidence

ORD record
ord-dc4d88bf24c14cc8bcd7225b3da8d1b4
Source dataset
uspto-grants-2005_07
Patent number
US06914140B1

Reaction notes

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