4-Toluenesulfonyl chloride → (3S,5R)-5-Methyl-3-(toluene-4-sulfonyloxymethyl)nonanoic acid tert-butyl ester

HRID 458042Notes

Reaction equation

HRID 458042 reaction equation
[C:1]([O:5][C:6](=[O:18])[CH2:7][C@@H:8]([CH2:16][OH:17])[CH2:9][C@H:10]([CH3:15])[CH2:11][CH2:12][CH2:13][CH3:14])([CH3:4])([CH3:3])[CH3:2].[C:19]1([CH3:29])[CH:24]=[CH:23][C:22]([S:25](Cl)(=[O:27])=[O:26])=[CH:21][CH:20]=1.C(N(CC)CC)C>C(Cl)Cl.CN(C1C=CN=CC=1)C>[C:1]([O:5][C:6](=[O:18])[CH2:7][C@@H:8]([CH2:16][O:17][S:25]([C:22]1[CH:23]=[CH:24][C:19]([CH3:29])=[CH:20][CH:21]=1)(=[O:27])=[O:26])[CH2:9][C@H:10]([CH3:15])[CH2:11][CH2:12][CH2:13][CH3:14])([CH3:3])([CH3:2])[CH3:4]

Participants

6

Reactant 3

HCID 73974-Toluenesulfonyl chlorideHCID 8471TriethylamineHCID 57065055(3S,5R)-3-Hydroxymethyl-5-methyl-nonanoic Acid Tert-butyl Ester

Product 1

HCID 57230188(3S,5R)-5-Methyl-3-(toluene-4-sulfonyloxymethyl)nonanoic acid tert-butyl ester

Reagents, catalysts & solvents 2

HCID 142844-(Dimethylamino)pyridineCatalystHCID 6344DichloromethaneSolvent

Procedure

To alcohol 140 (6.14 mmol) in 30 mL CH2Cl2 at 0° C. was added DMAP (0.1 g), p-toluenesulfonyl chloride (1.37 g, 7.2 mmol), and then triethylamine (1.8 mL, 13 mmol) was added quickly dropwise. The mixture was warmed immediately to ambient temperature following addition and stirred overnight, and did not proceed to completion. The mixture was partitioned between Et2O and 1N HCl (aq), the phases were separated, and the organic phase washed with sat. NaHCO3 (aq), dried (MgSO4), and concentrated to provide tosylate 141. The product was used without further purification.

Workup

  1. additionaddition
  2. customThe mixture was partitioned between Et2O and 1N HCl (aq)
  3. customthe phases were separated
  4. washthe organic phase washed with sat. NaHCO3 (aq)
  5. dry with materialdried (MgSO4)
  6. concentrationconcentrated

Sources & evidence

ORD record
ord-1bd54430bf264d61892c3d3b55627e6e
Source dataset
uspto-grants-2007_03
Patent number
US07189747B2

Reaction notes

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