Water → N-[(4-Fluoro-3-nitrophenyl)carbamoyl]glycine, ethyl ester

HRID 725223

Reaction equation

HRID 725223 reaction equation
[F:1][C:2]1[CH:7]=[CH:6][C:5]([N:8]=[C:9]=[O:10])=[CH:4][C:3]=1[N+:11]([O-:13])=[O:12].Cl.[CH2:15]([O:17][C:18](=[O:21])[CH2:19][NH2:20])[CH3:16].C(N(CC)CC)C.O>O1CCCC1>[F:1][C:2]1[CH:7]=[CH:6][C:5]([NH:8][C:9]([NH:20][CH2:19][C:18]([O:17][CH2:15][CH3:16])=[O:21])=[O:10])=[CH:4][C:3]=1[N+:11]([O-:13])=[O:12]

Participants

6

Reactant 4

HCID 962WaterHCID 8471TriethylamineHCID 1441174-Fluoro-3-nitrophenyl isocyanateHCID 2723640Glycine ethyl ester, hydrochloride

Product 1

HCID 85708209N-[(4-Fluoro-3-nitrophenyl)carbamoyl]glycine, ethyl esterYield 56.1%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

A solution of 4-fluoro-3-nitrophenyl isocyanate (10 g, 0.055 mol) in anhydrous tetrahydrofuran is cooled to 0° C., treated with glycine ethyl ester hydrochloride (7.7 g, 0.055 mol), treated with triethylamine (5.56 g, 0.055 mol) while maintaining the temperature below 10° C., stirred at room temperature for 1 hour and poured into water. The aqueous mixture is extracted with ether. The combined organic extracts are washed sequentially with 1N hydrochloric acid and brine, dried over anhydrous. magnesium sulfate, and concentrated in vacuo to obtain a solid which is air-dried to give the title product as a yellow solid (8.8 g, mp 115°-120° C.).

Workup

  1. temperaturewhile maintaining the temperature below 10° C.
  2. extractionThe aqueous mixture is extracted with ether
  3. washThe combined organic extracts are washed sequentially with 1N hydrochloric acid and brine
  4. customdried over anhydrous
  5. concentrationmagnesium sulfate, and concentrated in vacuo
  6. customto obtain a solid which
  7. customis air-dried

Sources & evidence

ORD record
ord-29f45918145c4ba78d81711fb2772081
Source dataset
uspto-grants-1998_01
Patent number
US05705644

Linked notes

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