Triethylamine → HCID 59424284, compound

HRID 501985Notes

Reaction equation

HRID 501985 reaction equation
[F:1][C:2]1[CH:10]=[CH:9][C:5]([C:6]([OH:8])=O)=[C:4]([N+:11]([O-:13])=[O:12])[CH:3]=1.ON1[C:19]2[CH:20]=[CH:21][CH:22]=[CH:23][C:18]=2N=N1.[CH3:24][N:25]([CH3:34])[CH2:26][CH2:27][CH2:28][N:29]=C=NCC.[CH2:35](N(CC)CC)C>O.C(OCC)(=O)C.C(OCC)(=O)C>[CH2:34]([N:25]1[CH2:24][CH2:35][CH:28]([NH:29][C:6](=[O:8])[C:5]2[CH:9]=[CH:10][C:2]([F:1])=[CH:3][C:4]=2[N+:11]([O-:13])=[O:12])[CH2:27][CH2:26]1)[C:18]1[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=1

Participants

7

Reactant 4

HCID 8471TriethylamineHCID 159081-Ethyl-3-(3'-dimethylaminopropyl)carbodiimideHCID 757711-HydroxybenzotriazoleHCID 27374164-Fluoro-2-nitrobenzoic acid

Product 1

HCID 59424284HCID 59424284, compoundYield 71%

Reagents, catalysts & solvents 2

HCID 8857Ethyl AcetateSolventHCID 22728543Water ethylacetateSolvent

Procedure

An oven dried flask was charged with 4-fluoro-2-nitrobenzoic acid (7.87 g, 42.5 mmol), 1-hydroxybenzotriazole (6.32 g, 46.8 mmol), 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide (8.96 g, 46.7 mmol) and ethyl acetate (150 mL), followed by fast dropwise addition of triethylamine (11.8 mL, 84.7 mmol) at room temperature. The resulting white suspension was stirred for 3 h. The reaction was poured into 1:1 water/ethyl acetate (400 mL). After separation, the aqueous layer was extracted with ethyl acetate (200 mL). The combined organic layer was washed with brine (50 mL), dried over magnesium sulfate, and concentrated in vacuo to give a solid upon standing over night. Trituration and washing with ethyl acetate (2×6 mL) afforded the title compound as a light yellow solid (9.87 g, 71% yield). 1H-NMR (CDCl3, 400 MHz) δ 7.74 (dd, J=6.4, 2.0, 1H), 7.50 (dd, J=6.8, 4.0, 1H), 7.43-7.22 (m, 6H), 5.71 (d, J=6.4, 1H), 4.05-3.93 (m, 1H), 3.50 (s, 2H), 2.85-2.79 (m, 2H), 2.20-2.14 (m, 2H), 2.05-2.02 (m, 2H), 1.58-1.49 (m, 2H). Mass spec.: 358.49 (MH+).

Workup

  1. customAn oven dried flask
  2. customAfter separation
  3. extractionthe aqueous layer was extracted with ethyl acetate (200 mL)
  4. washThe combined organic layer was washed with brine (50 mL)
  5. dry with materialdried over magnesium sulfate
  6. concentrationconcentrated in vacuo
  7. customto give a solid
  8. waitupon standing over night
  9. washTrituration and washing with ethyl acetate (2×6 mL)

Sources & evidence

ORD record
ord-0a0a3e7adf0545c3be8149756e6ac78b
Source dataset
uspto-grants-2010_08
Patent number
US07772244B2

Reaction notes

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