Hydrochloric Acid → 5-Methoxy-4-oxo-1-[3-(trifluoromethyl)phenyl]-1,4-dihydropyridazine-3-carboxylic acid

HRID 1805489ノート

反応式

HRID 1805489 の反応式
[CH3:1][O:2][C:3]1[C:4](=[O:23])[C:5]([C:19]([O:21]C)=[O:20])=[N:6][N:7]([C:9]2[CH:14]=[CH:13][CH:12]=[C:11]([C:15]([F:18])([F:17])[F:16])[CH:10]=2)[CH:8]=1.[OH-].[Na+].Cl>CO>[CH3:1][O:2][C:3]1[C:4](=[O:23])[C:5]([C:19]([OH:21])=[O:20])=[N:6][N:7]([C:9]2[CH:14]=[CH:13][CH:12]=[C:11]([C:15]([F:18])([F:16])[F:17])[CH:10]=2)[CH:8]=1

参加物

5

反応物 3

HCID 313Hydrochloric AcidHCID 14798Sodium HydroxideHCID 59436268Methyl 5-methoxy-4-oxo-1-[3-(trifluoromethyl)phenyl]-1,4-dihydropyridazine-3-carboxylate

生成物 1

HCID 594362475-Methoxy-4-oxo-1-[3-(trifluoromethyl)phenyl]-1,4-dihydropyridazine-3-carboxylic acid収率 92%

試薬・触媒・溶媒 1

HCID 887Methanol溶媒

実験手順

To a suspension of methyl 5-methoxy-4-oxo-1-[3-(trifluoromethyl)phenyl]-1,4-dihydropyridazine-3-carboxylate (10.0 g, 30.5 mmol) in MeOH (100 mL) was added 1 M NaOH aqueous solution (61 mL) at 0° C. The mixture was stirred at room temperature for 30 min. To the solution was added 1 M HCl aqueous solution (61 mL) at 0° C. The mixture was concentrated in vacuo. The precipitates were collected by filtration, washed with water and dried in vacuo at 60° C. to yield the title compound (8.78 g, 92% yield) as a pale yellow solid: 1H NMR (DMSO-d6, 300 MHz): δ ppm 3.98 (3H, s), 7.82-8.01 (2H, m), 8.11-8.34 (2H, m), 8.97 (1H, s), 15.00 (1H, brs).

後処理

  1. concentrationThe mixture was concentrated in vacuo
  2. filtrationThe precipitates were collected by filtration
  3. washwashed with water
  4. customdried in vacuo at 60° C.

出典と根拠

ORDレコード
ord-49a6bca9bbf14b88a52daa602f8ad3be
出典データセット
uspto-grants-2013_01
特許番号
US08354411B2

反応ノート

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