4-Nitrobenzoic Acid → 4-nitrobenzoic acid (S)-1-[(3R,5R)-5-(4-chlorophenyl)morpholin-3-yl]ethyl ester

HRID 16378Notes

Reaction equation

HRID 16378 reaction equation
[Cl:1][C:2]1[CH:7]=[CH:6][C:5]([C@H:8]2[NH:13][C@@H:12]([C@H:14]([OH:16])[CH3:15])[CH2:11][O:10][CH2:9]2)=[CH:4][CH:3]=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.[N+:36]([C:39]1[CH:47]=[CH:46][C:42]([C:43](O)=[O:44])=[CH:41][CH:40]=1)([O-:38])=[O:37].N(C(OC(C)C)=O)=NC(OC(C)C)=O>O.C(OCC)(=O)C.O1CCCC1>[Cl:1][C:2]1[CH:3]=[CH:4][C:5]([C@H:8]2[NH:13][C@@H:12]([C@@H:14]([O:16][C:43](=[O:44])[C:42]3[CH:41]=[CH:40][C:39]([N+:36]([O-:38])=[O:37])=[CH:47][CH:46]=3)[CH3:15])[CH2:11][O:10][CH2:9]2)=[CH:6][CH:7]=1

Participants

8

Reactant 4

HCID 61084-Nitrobenzoic AcidHCID 11776TriphenylphosphineHCID 75555Diisopropyl diazene-1,2-dicarboxylateHCID 67371750(R)-1-[(3R,5R)-5-(4-chlorophenyl)morpholin-3-yl]ethanol

Product 1

HCID 673717534-nitrobenzoic acid (S)-1-[(3R,5R)-5-(4-chlorophenyl)morpholin-3-yl]ethyl esterYield 100%

Reagents, catalysts & solvents 3

HCID 962WaterSolventHCID 8028TetrahydrofuranSolventHCID 8857Ethyl AcetateSolvent

Procedure

Under a nitrogen atmosphere, to a tetrahydrofuran (20 mL) solution containing (R)-1-[(3R,5R)-5-(4-chlorophenyl)morpholine-3-yl]ethanol (903 mg), triphenylphosphine (1.81 g) and 4-nitrobenzoic acid (1.16 g) was dropwise added diisopropyl azodicarboxylate (1.36 mL) while cooling with ice. The resultant solution was stirred at the same temperature for 30 minutes, and then at room temperature for 2 hours. The reaction solution was diluted with water and ethyl acetate, and the organic layer was partitioned. The organic layer was washed with brine, and then dried over anhydrous magnesium sulfate. Solvent was removed by distillation under reduced pressure, and the resulting residue was purified by silica gel column chromatography (heptane/ethyl acetate 9/1→8/2→7/3), to thereby obtain the titled compound (1.46 g). The physical properties of the compound were as follows.

Workup

  1. temperaturewhile cooling with ice
  2. customthe organic layer was partitioned
  3. washThe organic layer was washed with brine
  4. dry with materialdried over anhydrous magnesium sulfate
  5. customSolvent was removed by distillation under reduced pressure
  6. customthe resulting residue was purified by silica gel column chromatography (heptane/ethyl acetate 9/1→8/2→7/3)

Sources & evidence

ORD record
ord-489e22ec5f324a1fa5c6b5dc8e7ff3c4
Source dataset
uspto-grants-2010_06
Patent number
US07737141B2

Reaction notes

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