Triethylamine → (R)-tert-butyl 3-((R)-(5-chloro-2-methylphenyl)(2-(methylsulfonyloxy)ethoxy)methyl)piperidine-1-carboxylate

HRID 2039916Notes

Reaction equation

HRID 2039916 reaction equation
[Cl:1][C:2]1[CH:3]=[CH:4][C:5]([CH3:26])=[C:6]([C@H:8]([O:22][CH2:23][CH2:24][OH:25])[C@@H:9]2[CH2:14][CH2:13][CH2:12][N:11]([C:15]([O:17][C:18]([CH3:21])([CH3:20])[CH3:19])=[O:16])[CH2:10]2)[CH:7]=1.CCN(CC)CC.[CH3:34][S:35](Cl)(=[O:37])=[O:36]>C(Cl)Cl>[Cl:1][C:2]1[CH:3]=[CH:4][C:5]([CH3:26])=[C:6]([C@H:8]([O:22][CH2:23][CH2:24][O:25][S:35]([CH3:34])(=[O:37])=[O:36])[C@@H:9]2[CH2:14][CH2:13][CH2:12][N:11]([C:15]([O:17][C:18]([CH3:20])([CH3:21])[CH3:19])=[O:16])[CH2:10]2)[CH:7]=1

Participants

5

Reactant 3

HCID 8471TriethylamineHCID 31297Methanesulfonyl chlorideHCID 58011515(R)-tert-butyl 3-((R)-(5-chloro-2-methylphenyl)(2-hydroxyethoxy)methyl)piperidine-1-carboxylate

Product 1

HCID 58011567(R)-tert-butyl 3-((R)-(5-chloro-2-methylphenyl)(2-(methylsulfonyloxy)ethoxy)methyl)piperidine-1-carboxylateYield 99.4%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent2×

Procedure

To a solution of (R)-tert-butyl 3-((R)-(5-chloro-2-methylphenyl)(2-hydroxyethoxy)methyl)piperidine-1-carboxylate (7 g, 18.3 mmol) in dry CH2Cl2 (100 mL) was added Et3N (54 g, 10 mL, 0.73 mmol) at −5-0° C. Then a solution of MsCl (4.2 g, 36.5 mmol) in dry CH2Cl2 (50 mL) was added dropwise at the same temperature. After addition, it was allowed to warm to rt gradually. The reaction mixture was washed with 10% citric acid solution (30 mL), NaHCO3 and brine, then dried over Na2SO4, filtered and concentrated to give (R)-tert-butyl 3-((R)-(5-chloro-2-methylphenyl)(2-(methylsulfonyloxy)ethoxy)methyl)piperidine-1-carboxylate (8.4 g), which was used in the next step without purification.

Workup

  1. additionAfter addition, it
  2. washThe reaction mixture was washed with 10% citric acid solution (30 mL), NaHCO3 and brine
  3. dry with materialdried over Na2SO4
  4. filtrationfiltered
  5. concentrationconcentrated

Sources & evidence

ORD record
ord-c88be429f2f144e8b483cf080ef73e63
Source dataset
uspto-grants-2013_11
Patent number
US08580823B2

Reaction notes

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