Triethylamine → HCID 59455715, compound

HRID 1920164Notes

Reaction equation

HRID 1920164 reaction equation
[C:1]([O:9][C@H:10]1[CH2:15][C@@H:14](O)[CH2:13][N:12]([C:17]([O:19][CH2:20][C:21]2[CH:26]=[CH:25][CH:24]=[CH:23][CH:22]=2)=[O:18])[CH2:11]1)(=[O:8])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.C(N(CC)CC)C.CS(Cl)(=O)=O.[N-:39]=[N+:40]=[N-:41].[Na+]>ClCCl.CCOC(C)=O>[N:39]([C@H:14]1[CH2:15][C@H:10]([O:9][C:1](=[O:8])[C:2]2[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=2)[CH2:11][N:12]([C:17]([O:19][CH2:20][C:21]2[CH:26]=[CH:25][CH:24]=[CH:23][CH:22]=2)=[O:18])[CH2:13]1)=[N+:40]=[N-:41]

Participants

7

Reactant 4

HCID 8471TriethylamineHCID 31297Methanesulfonyl chlorideHCID 33557Sodium AzideHCID 59455752HCID 59455752, compound

Product 1

HCID 59455715HCID 59455715, compoundYield 88%

Reagents, catalysts & solvents 2

HCID 6344DichloromethaneSolventHCID 8857Ethyl AcetateSolvent2×

Procedure

To a solution of (3S,5R)-benzyl 3-(benzoyloxy)-5-hydroxypiperidine-1-carboxylate (1 eq) in 20 mL of dichloromethane was added triethyl amine (3 eq) and methanesulfonyl chloride (1.5 eq) at 0° C. The reaction mixture was allowed to stir at room temperature for 2 hours. The crude mixture was diluted with 120 mL of EtOAc, washed with sat. aq. sodium bicarbonate, brine, then dried over anhydrous MgSO4, filtered, and concentrated in vacuo. The crude residue was dissolved in 25 mL of NMP. Sodium azide (2.2 eq) was added and the resulting suspension was stirred at 80° C. overnight. The reaction mixture was diluted with 200 mL of EtOAc and 100 mL of hexanes, washed with water, brine, then dried over anhydrous MgSO4, filtered, and concentrated in vacuo. The crude residue was purified by flash chromatography (EtOAc:hexanes=1:2) to yield (3S,5S)-benzyl 3-azido-5-(benzoyloxy)piperidine-1-carboxylate (88%). LC/MS (m/z): 381.0 (MH+). HPLC: Rt: 4.41 min.

Workup

  1. washwashed with sat. aq. sodium bicarbonate, brine
  2. dry with materialdried over anhydrous MgSO4
  3. filtrationfiltered
  4. concentrationconcentrated in vacuo
  5. dissolutionThe crude residue was dissolved in 25 mL of NMP
  6. stirringthe resulting suspension was stirred at 80° C. overnight
  7. washwashed with water, brine
  8. dry with materialdried over anhydrous MgSO4
  9. filtrationfiltered
  10. concentrationconcentrated in vacuo
  11. customThe crude residue was purified by flash chromatography (EtOAc:hexanes=1:2)

Sources & evidence

ORD record
ord-3257046b21fa4ee4a15c606e2ee6b39a
Source dataset
uspto-grants-2012_05
Patent number
US08168794B2

Reaction notes

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