Water → 1-(tert-Butoxycarbonyl)-4-(p-toluenesulfonyloxy)piperidine

HRID 895621Notes

Reaction equation

HRID 895621 reaction equation
[C:1]([O:5][C:6]([N:8]1[CH2:13][CH2:12][CH:11]([OH:14])[CH2:10][CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2].[C:15]1([CH3:25])[CH:20]=[CH:19][C:18]([S:21](Cl)(=[O:23])=[O:22])=[CH:17][CH:16]=1.C(N(CC)CC)C.O>N1C=CC=CC=1>[C:1]([O:5][C:6]([N:8]1[CH2:13][CH2:12][CH:11]([O:14][S:21]([C:18]2[CH:19]=[CH:20][C:15]([CH3:25])=[CH:16][CH:17]=2)(=[O:23])=[O:22])[CH2:10][CH2:9]1)=[O:7])([CH3:4])([CH3:2])[CH3:3]

Participants

6

Reactant 4

HCID 962WaterHCID 73974-Toluenesulfonyl chlorideHCID 8471TriethylamineHCID 643502Tert-butyl 4-hydroxypiperidine-1-carboxylate

Product 1

HCID 157347131-(tert-Butoxycarbonyl)-4-(p-toluenesulfonyloxy)piperidineYield 76.4%

Reagents, catalysts & solvents 1

HCID 1049PyridineSolvent

Procedure

1-(tert-Butoxycarbonyl)-4-hydroxypiperidine (4.81 g) was dissolved in pyridine (48 ml), added with p-toluenesulfonyl chloride (9.0 g) and triethylamine (6.7 ml) and stirred at room temperature for 17 hours. The reaction mixture was added with cold water (500 ml) and stirred for 2 hours, and then the produced crystals were collected by filtration. These crystals were purified by silica gel column chromatography (elution solvent: hexane:ethyl acetate=3:1) to obtain 6.49 g of the title compound. Yield: 76%.

Workup

  1. stirringstirred for 2 hours
  2. filtrationthe produced crystals were collected by filtration
  3. customThese crystals were purified by silica gel column chromatography (elution solvent: hexane:ethyl acetate=3:1)

Sources & evidence

ORD record
ord-53874a781c2447ac9cf83e9c89d33c4d
Source dataset
uspto-grants-2005_07
Patent number
US06916822B2

Reaction notes

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