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Dimethylcarbamoyl Chloride → Dimethyl-carbamic acid 2-cyano-5-fluoro-phenyl ester

HRID 348164
Notes
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Reaction equation

HRID 348164 reaction equation
[F:1][C:2]1[CH:9]=[CH:8][C:5]([C:6]#[N:7])=[C:4]([OH:10])[CH:3]=1.[CH3:11][N:12]([CH3:16])[C:13](Cl)=[O:14].C(N(CC)CC)C>ClC(Cl)C>[C:6]([C:5]1[CH:8]=[CH:9][C:2]([F:1])=[CH:3][C:4]=1[O:10][C:13](=[O:14])[N:12]([CH3:16])[CH3:11])#[N:7]
ParticipantsProcedureWorkupSources & evidenceReaction notes

Participants

5

Reactant 3

HCID 6598Dimethylcarbamoyl ChlorideHCID 8471TriethylamineHCID 110299014-Fluoro-2-hydroxybenzonitrile

Product 1

HCID 58777394Dimethyl-carbamic acid 2-cyano-5-fluoro-phenyl esterYield 67%

Reagents, catalysts & solvents 1

HCID 63651,1-DichloroethaneSolvent2×

Procedure

Under N2, a stirred solution of intermediate 129, 4-fluoro-2-hydroxybenzonitrile (685 mg, 5.00 mmol), dimethylcarbamoyl chloride, and triethylamine (606 mg, 6 mmol) in dichloroethane (10 mL) was heated at reflux for 20 hrs. The cooled mixture was diluted with dichloroethane (10 mL) washed with water, and brine. The organic layer was separated, dried (Na2SO4), concentrated, and the residue purified by column chromatography (SiO2, 5% ethyl acetate-CH2Cl2) to provide 700 mg (Yield 67%) of the title compound as a white crystalline solid: 1H NMR (CDCl3, 500 MHz) δ ppm: 3.03 (3H, s, NMe), 3.15 (3H, s, NMe), 6.99 (1H, dt, J=2.5 Hz, 8.5 Hz, Ar—H), 7.23 (1H, dd, J=2.5 Hz, 9.5 Hz, Ar—H), 7.61 (1H, dd, J=9 Hz, 6 Hz, Ar—H); 13C NMR (CDCl3, 125.77 Hz) δ ppm: 36.76, 37.06, 102.84, 102.86, 111.59, 111.79, 113.24, 113.42, 114.99, 134.36, 134.45, 152.54, 155.06, 155.16, 164.26, 166.31. HRMS (ESI) calcd for C10H10N2O2F (M+H) 209.0726, found 209.0722.

Workup

  1. temperatureat reflux for 20 hrs
  2. washwashed with water, and brine
  3. customThe organic layer was separated
  4. dry with materialdried (Na2SO4)
  5. concentrationconcentrated
  6. customthe residue purified by column chromatography (SiO2, 5% ethyl acetate-CH2Cl2)

Sources & evidence

ORD record
ord-e4b497e9d72b4493ad07537b4bb8bdd6
Source dataset
uspto-grants-2007_02
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US07176196B2

Reaction notes

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On this pageParticipantsProcedureWorkupSources & evidenceReaction notes