4-Toluenesulfonyl chloride → (R)-tert-butyl 2-(tosyloxymethyl)morpholine-4-carboxylate

HRID 1043230Notes

Reaction equation

HRID 1043230 reaction equation
[OH:1][CH2:2][C@@H:3]1[O:8][CH2:7][CH2:6][N:5]([C:9]([O:11][C:12]([CH3:15])([CH3:14])[CH3:13])=[O:10])[CH2:4]1.C(N(CC)CC)C.[CH3:23][C:24]1[CH:29]=[CH:28][C:27]([S:30](Cl)(=[O:32])=[O:31])=[CH:26][CH:25]=1>ClCCl.[Cl-].[Na+].O>[S:30]([O:1][CH2:2][C@@H:3]1[O:8][CH2:7][CH2:6][N:5]([C:9]([O:11][C:12]([CH3:15])([CH3:14])[CH3:13])=[O:10])[CH2:4]1)([C:27]1[CH:28]=[CH:29][C:24]([CH3:23])=[CH:25][CH:26]=1)(=[O:32])=[O:31]

Participants

6

Reactant 3

HCID 73974-Toluenesulfonyl chlorideHCID 8471TriethylamineHCID 1512576(R)-N-Boc-2-hydroxymethylmorpholine

Product 1

HCID 54043639(R)-tert-butyl 2-(tosyloxymethyl)morpholine-4-carboxylate

Reagents, catalysts & solvents 2

HCID 6344DichloromethaneSolvent2×HCID 57417360Sodium chloride; waterSolvent

Procedure

To a solution of (R)-tert-butyl 2-(hydroxymethyl)morpholine-4-carboxylate (1 g) in dichloromethane (50 mL) was added triethylamine (1.604 mL) and 4-methylbenzene-1-sulfonyl chloride (1.097 g). The mixture was stirred at ambient temperature under nitrogen for 72 hours. The reaction was diluted with methylene chloride (50 mL) and brine (100 mL). The brine layer was extracted with methylene chloride (75 mL). The combined organics were dried over sodium sulfate, filtered and concentrated. The crude material was purified on a silica gel column eluting with a 15-65% ethyl acetate in hexane gradient to give the title compound.

Workup

  1. extractionThe brine layer was extracted with methylene chloride (75 mL)
  2. dry with materialThe combined organics were dried over sodium sulfate
  3. filtrationfiltered
  4. concentrationconcentrated
  5. customThe crude material was purified on a silica gel column
  6. washeluting with a 15-65% ethyl acetate in hexane gradient

Sources & evidence

ORD record
ord-00ef1440ed21481db401591b125ab186
Source dataset
uspto-grants-2013_10
Patent number
US08557983B2

Reaction notes

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