Triethylamine → 1-Phthalimido-4-p-toluenesulfonyl-6,6-difluoro-8-hydroxy-4-aza-octane

HRID 2072888Notes

Reaction equation

HRID 2072888 reaction equation
[C:1]1(=[O:39])[N:5]([CH2:6][CH2:7][CH2:8][N:9]([S:24]([C:27]2[CH:32]=[CH:31][C:30]([CH3:33])=[CH:29][CH:28]=2)(=[O:26])=[O:25])[CH2:10][C:11]([F:23])([F:22])[CH2:12][CH2:13][O:14]CC2C=CC=CC=2)[C:4](=[O:34])[C:3]2=[CH:35][CH:36]=[CH:37][CH:38]=[C:2]12.C[Si](I)(C)C.C(N(CC)CC)C>ClCCl.CO>[C:4]1(=[O:34])[N:5]([CH2:6][CH2:7][CH2:8][N:9]([S:24]([C:27]2[CH:28]=[CH:29][C:30]([CH3:33])=[CH:31][CH:32]=2)(=[O:25])=[O:26])[CH2:10][C:11]([F:23])([F:22])[CH2:12][CH2:13][OH:14])[C:1](=[O:39])[C:2]2=[CH:38][CH:37]=[CH:36][CH:35]=[C:3]12

Participants

6

Reactant 3

HCID 8471TriethylamineHCID 85247Trimethylsilyl iodideHCID 198607071-Phthalimido-4-p-toluenesulfonyl-6,6-difluoro-8-benzyloxy-4-aza-octane

Product 1

HCID 198606861-Phthalimido-4-p-toluenesulfonyl-6,6-difluoro-8-hydroxy-4-aza-octane

Reagents, catalysts & solvents 2

HCID 887MethanolSolvent2×HCID 6344DichloromethaneSolvent2×

Procedure

A solution of 1-phthalimido-4-p-toluenesulfonyl-6,6-difluoro-8-benzyloxy-4-aza-octane (9.5 g, 17.1 mM) and trimethylsilyl iodide (2.7 mL, 10% excess) in dry dichloromethane is stirred overnight at room temperature under nitrogen. Triethylamine (3 g) is added, and stirring is continued for 1 hour at room temperature. Following the addition of more dichloromethane, the reaction mixture is washed with 1N HCL (twice), aqueous NaHSO3 (twice), brine (twice), and dried (Na2SO4). The solvents are removed by evaporation to yield an oil. This oil is dissolved in methanol and 1 mL of a 9N solution of HCL in methanol is added. The mixture is evaporated and stripped twice with CCl4 to provide an oil, which upon scratching with ether/petroleum ether yields 1-phthalimido-4-p-toluenesulfonyl-6,6-difluoro-8-hydroxy-4-aza-octane as slightly violet crystals: 6.8 g (85%).

Workup

  1. washthe reaction mixture is washed with 1N HCL (twice), aqueous NaHSO3 (twice), brine (twice), and
  2. dry with materialdried (Na2SO4)
  3. customThe solvents are removed by evaporation
  4. customto yield an oil
  5. customThe mixture is evaporated
  6. customto provide an oil, which

Sources & evidence

ORD record
ord-a4f2e3d9d8914736927abd39456c4138
Source dataset
uspto-grants-1990_04
Patent number
US04914240

Reaction notes

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