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

HRID 1432292Notes

Reaction equation

HRID 1432292 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-468d32ca7daa4a629dabc0801f2f2c21
Source dataset
uspto-grants-2009_11
Patent number
US07612083B2

Reaction notes

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