Triethylamine → tert-butyl N-{2-[2-(methanesulfonyloxy)ethoxy]ethyl}carbamate

HRID 1840825Notes

Reaction equation

HRID 1840825 reaction equation
[OH:1][CH2:2][CH2:3][O:4][CH2:5][CH2:6][NH:7][C:8](=[O:14])[O:9][C:10]([CH3:13])([CH3:12])[CH3:11].C(N(CC)CC)C.[CH3:22][S:23](Cl)(=[O:25])=[O:24]>C(Cl)Cl>[CH3:22][S:23]([O:1][CH2:2][CH2:3][O:4][CH2:5][CH2:6][NH:7][C:8]([O:9][C:10]([CH3:11])([CH3:13])[CH3:12])=[O:14])(=[O:25])=[O:24]

Participants

5

Reactant 3

HCID 8471TriethylamineHCID 31297Methanesulfonyl chlorideHCID 52204702-(2-Boc-aminoethoxy)ethanol

Product 1

HCID 12106196tert-butyl N-{2-[2-(methanesulfonyloxy)ethoxy]ethyl}carbamateYield 97.4%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

A rapidly stirred solution of tert-butyl 2-(2-hydroxyethoxy)ethylcarbamate (47.1 g, 0.230 mol) in 1 L of anhydrous CH2Cl2 was cooled to 0° C. under N2 and treated with triethylamine (48.0 mL, 0.345 mol). Methanesulfonyl chloride (19.6 mL, 0.253 mol) was then added dropwise over 30 min. The reaction mixture was then allowed to warm to room temperature and was stirred an additional 22 h. The reaction was quenched by addition of 500 mL saturated NaHCO3 solution and the organic layer was separated. The organic phase was then washed with H2O (3×500 mL) and brine. The organic portion was dried over Na2SO4 and concentrated to give 2-{2-[(tert-butoxycarbonyl)amino]ethoxy}ethyl methanesulfonate as a brown oil (63.5 g).

Workup

  1. customThe reaction was quenched by addition of 500 mL saturated NaHCO3 solution
  2. customthe organic layer was separated
  3. washThe organic phase was then washed with H2O (3×500 mL) and brine
  4. dry with materialThe organic portion was dried over Na2SO4
  5. concentrationconcentrated

Sources & evidence

ORD record
ord-30e8f3068ee5412e9f5f4684abad0483
Source dataset
uspto-grants-2004_01
Patent number
US06683088B2

Reaction notes

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