1,1'-Carbonyldiimidazole → 2-[(4-ethyl-2-fluorophenyl)amino]-3,4-difluoro-N-(2-hydroxyethoxy)benzamide

HRID 2181429ノート

反応式

HRID 2181429 の反応式
[CH2:1]([C:3]1[CH:8]=[CH:7][C:6]([NH:9][C:10]2[C:18]([F:19])=[C:17]([F:20])[CH:16]=[CH:15][C:11]=2[C:12]([OH:14])=O)=[C:5]([F:21])[CH:4]=1)[CH3:2].C(N1C=CN=C1)(N1C=CN=C1)=O.[N-]1C=CN=C1.[NH2:39][O:40][CH2:41][CH2:42][OH:43]>C1COCC1>[CH2:1]([C:3]1[CH:8]=[CH:7][C:6]([NH:9][C:10]2[C:18]([F:19])=[C:17]([F:20])[CH:16]=[CH:15][C:11]=2[C:12]([NH:39][O:40][CH2:41][CH2:42][OH:43])=[O:14])=[C:5]([F:21])[CH:4]=1)[CH3:2]

参加物

6

反応物 4

HCID 682631,1'-CarbonyldiimidazoleHCID 3014186Ethanol, 2-(aminooxy)-HCID 3386966ImidazolateHCID 220256532-[(4-Ethyl-2-fluorophenyl)amino]-3,4-difluorobenzoic acid

生成物 1

HCID 101936532-[(4-ethyl-2-fluorophenyl)amino]-3,4-difluoro-N-(2-hydroxyethoxy)benzamide収率 65%

試薬・触媒・溶媒 1

HCID 8028Tetrahydrofuran溶媒2 回

実験手順

The title compound was prepared from the reaction of the product of Step D, 2-[(4-ethyl-2-fluorophenyl)amino]-3,4-difluorobenzoic acid (93 mg, 0.32 mmol) dissolved in dry THF (5 mL), and carbonyldiimidazole (CDI) (102 mg, 0.63 mmol). Within 10 minutes, a bright yellow solution was obtained and conversion to the imidazolide was confirmed by TLC (50% EtOAc/hexanes). A solution of 2-(aminooxy)ethanol (97 mg, 1.26 mmol) in THF (5 mL) was then added and the mixture stirred for 15 hours at room temperature. The reaction solvent was removed under reduced pressure and the residue partitioned between 1 M HCl (50 mL) and EtOAc (50 mL). The EtOAc layer was then washed with water (50 mL) and saturated NaCl solution (50 mL), dried (Na2SO4), and the solvent removed under reduced pressure to afford an oil which was purified by flash column chromatography on silica gel (50% EtOAc/hexanes) to give 2-[(4-ethyl-2-fluorophenyl)amino]-3,4-difluoro-N-(2-hydroxyethoxy)benzamide as a cream solid (65%); m.p. (EtOAc/hexanes) 134-138° C. 1H NMR [400 MHz, (CD3)2SO] δ 11.84 (br s, 1 H), 8.76 (br s, 1 H), 7.43-7.37 (m, 1 H), 7.14-7.02 (m, 2 H), 6.90 (dd, J=8.3, 1.5 Hz, 1 H), 6.83 (td, J=8.6, 4.4 Hz, 1 H), 4.70 (br s, 1 H), 3.86 (t, J=4.9 Hz, 2 H), 3.57 (t, J=4.9 Hz, 2 H), 2.54 (q, J=7.6 Hz, 2 H), 1.15 (t, J=7.6 Hz, 3 H).

後処理

  1. customa bright yellow solution was obtained
  2. customThe reaction solvent was removed under reduced pressure
  3. customthe residue partitioned between 1 M HCl (50 mL) and EtOAc (50 mL)
  4. washThe EtOAc layer was then washed with water (50 mL) and saturated NaCl solution (50 mL)
  5. dry with materialdried (Na2SO4)
  6. customthe solvent removed under reduced pressure
  7. customto afford an oil which
  8. customwas purified by flash column chromatography on silica gel (50% EtOAc/hexanes)

出典と根拠

ORDレコード
ord-4626b39776514226bb2be8a98668688d
出典データセット
uspto-grants-2005_05
特許番号
US06891066B2

反応ノート

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