Water → HCID 58011565, compound

HRID 218394Notes

Reaction equation

HRID 218394 reaction equation
[NH2:1][CH2:2][CH2:3][O:4][C@@H:5]([C:19]1[CH:24]=[CH:23][CH:22]=[C:21]([F:25])[CH:20]=1)[C@@H:6]1[CH2:11][CH2:10][CH2:9][N:8]([C:12]([O:14][C:15]([CH3:18])([CH3:17])[CH3:16])=[O:13])[CH2:7]1.CCN(CC)CC.Cl[C:34]([O:36][CH3:37])=[O:35].O>CN(C1C=CN=CC=1)C.C(Cl)Cl>[F:25][C:21]1[CH:20]=[C:19]([C@H:5]([O:4][CH2:3][CH2:2][NH:1][C:34]([O:36][CH3:37])=[O:35])[C@@H:6]2[CH2:11][CH2:10][CH2:9][N:8]([C:12]([O:14][C:15]([CH3:18])([CH3:16])[CH3:17])=[O:13])[CH2:7]2)[CH:24]=[CH:23][CH:22]=1

Participants

7

Reactant 4

HCID 962WaterHCID 6586Methyl chloroformateHCID 8471TriethylamineHCID 58011526HCID 58011526, compound

Product 1

HCID 58011565HCID 58011565, compoundYield 97%

Reagents, catalysts & solvents 2

HCID 142844-(Dimethylamino)pyridineCatalystHCID 6344DichloromethaneSolvent2×

Conditions

Temperature
2.5 °C

Procedure

To a solution of (R)-tert-butyl 3-((R)-(2-aminoethoxy)(3-fluorophenyl)methyl)piperidine-1-carboxylate (10 g, 28.41 mmol) and DMAP (1.8 g, 14.21 mmol, 0.5 eq) in dry CH2Cl2 (150 mL), Et3N (8.62 g, 11.42 mL, 85.23 mmol) was added. The resulting mixture was cooled to 0-5° C. under ice-water bath, a solution of methyl chloroformate (10.95 mL, 142.05 mmol, 5 eq) in dry CH2Cl2 (60 mL) was added dropwise. After addition, the reaction mixture was stirred for 1-2 hr at 0-5° C. Water (80 mL) was added to quench the reaction. The aqueous layer was extracted with CH2Cl2 (3×50 mL), the combined organic layers were washed with 10% citric acid (2×80 mL) and brine, then dried over Na2SO4, filtered and concentrated to the crude product, which was purified by silica gel to afford (R)-tert-butyl 3-((R)-(3-fluorophenyl)(2-(methoxycarbonylamino)ethoxy)methyl)piperidine-1-carboxylate (11.3 g, 97%).

Workup

  1. additionAfter addition
  2. customto quench
  3. customthe reaction
  4. extractionThe aqueous layer was extracted with CH2Cl2 (3×50 mL)
  5. washthe combined organic layers were washed with 10% citric acid (2×80 mL) and brine
  6. dry with materialdried over Na2SO4
  7. filtrationfiltered
  8. concentrationconcentrated to the crude product, which
  9. customwas purified by silica gel

Sources & evidence

ORD record
ord-b4c749fd60c94d99aad6df06443244c1
Source dataset
uspto-grants-2012_06
Patent number
US08198453B2

Reaction notes

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