Hydrochloric Acid → Carbonic acid 4-nitro-phenyl ester (R)-1-phenyl-ethyl ester

HRID 423950

Reaction equation

HRID 423950 reaction equation
[C:1]1([C@H:7]([OH:9])[CH3:8])[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.N1C=CC=CC=1.CC1CCCO1.Cl[C:23]([O:25][C:26]1[CH:31]=[CH:30][C:29]([N+:32]([O-:34])=[O:33])=[CH:28][CH:27]=1)=[O:24].Cl>O>[C:1]1([C@H:7]([O:9][C:23](=[O:24])[O:25][C:26]2[CH:27]=[CH:28][C:29]([N+:32]([O-:34])=[O:33])=[CH:30][CH:31]=2)[CH3:8])[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1

Participants

7

Reactant 5

HCID 313Hydrochloric AcidHCID 1049PyridineHCID 73012-MethyltetrahydrofuranHCID 821294-Nitrophenyl chloroformateHCID 6375161-Phenylethanol, (R)-

Product 1

HCID 11108942Carbonic acid 4-nitro-phenyl ester (R)-1-phenyl-ethyl esterYield 98.3%

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Conditions

Temperature
0 °C

Procedure

A mixture of (R)-1-phenyl-ethanol (60.6 g, 0.496 mol), pyridine (42.5 mL, 0.526 mol) and 2-methyl-tetrahydrofuran (600 mL) was cooled to 0° C. and p-nitrophenyl chloroformate (100 g, 0.496 mol) was added over 15 min keeping the internal temperature below 5° C. The reaction mixture was warmed to room temperature and stirred for 2 h. To the reaction mixture was added 1.0 M HCl in water (300 mL). Layers were separated. The organic layer was washed with 1N HCl (300 mL) and brine (300 mL), filtered, concentrated to dryness by rotary evaporation, and dried under vacuum to give the title compound (140 g) as a clear yellow oil.

Workup

  1. customthe internal temperature below 5° C
  2. temperatureThe reaction mixture was warmed to room temperature
  3. customLayers were separated
  4. washThe organic layer was washed with 1N HCl (300 mL) and brine (300 mL)
  5. filtrationfiltered
  6. concentrationconcentrated to dryness by rotary evaporation
  7. customdried under vacuum

Sources & evidence

ORD record
ord-da4a8c0ee518429692089bb3943c4831
Source dataset
uspto-grants-2012_01
Patent number
US08101794B2

Linked notes

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