Triethylamine → tert-Butyl 4-[(methanesulfonyl)amino]piperidine-1-carboxylate

HRID 1192647Notes

Reaction equation

HRID 1192647 reaction equation
[NH2:1][CH:2]1[CH2:7][CH2:6][N:5]([C:8]([O:10][C:11]([CH3:14])([CH3:13])[CH3:12])=[O:9])[CH2:4][CH2:3]1.[CH3:15][S:16](Cl)(=[O:18])=[O:17].C(N(CC)CC)C>C(Cl)Cl>[CH3:15][S:16]([NH:1][CH:2]1[CH2:3][CH2:4][N:5]([C:8]([O:10][C:11]([CH3:14])([CH3:13])[CH3:12])=[O:9])[CH2:6][CH2:7]1)(=[O:18])=[O:17]

Participants

5

Reactant 3

HCID 8471TriethylamineHCID 31297Methanesulfonyl chlorideHCID 12682914-Amino-1-Boc-piperidine

Product 1

HCID 47464928tert-Butyl 4-[(methanesulfonyl)amino]piperidine-1-carboxylate

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent2×

Procedure

tert-Butyl 4-aminopiperidine-1-carboxylate (0.10 g, 0.50 mol) was combined with methanesulfonyl chloride (0.043 mL, 0.56 mol) and triethylamine (0.21 mL, 1.5 mmol) in methylene chloride (2 mL) at room temperature and stirred for 2 hours. The reaction was diluted with dichloromethane, washed with water, dried over MgSO4, concentrated and purified on silica gel (eluting with 0 to 5% methanol in dichloromethane) to give tert-butyl 4-[(methylsulfonyl)amino]piperidine-1-carboxylate, LCMS [M+Na]+: m/z=301.0. The later was treated with 4.57 M hydrogen chloride in 1,4-dioxane (1 mL, 4 mmol) at room temperature for 1 hour. The mixture was concentrated to give the desired HCl salt, which was used directly in the next step. LCMS calculated for C6H15N2O2S (M+H)+: m/z=179.1; Found: 179.1.

Workup

  1. washwashed with water
  2. dry with materialdried over MgSO4
  3. concentrationconcentrated
  4. custompurified on silica gel (eluting with 0 to 5% methanol in dichloromethane)

Sources & evidence

ORD record
ord-df4f56b461ef47bf85e72afdeaa2db5d
Source dataset
uspto-grants-2014_03
Patent number
US08680108B2

Reaction notes

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