Sodium Hydroxide → 5-Phenyl-2-Thiophenecarboxylic Acid

HRID 412005

反応式

HRID 412005 の反応式
[C:1]1([C:7]2[S:11][C:10]([CH:12]=[O:13])=[CH:9][CH:8]=2)[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.[OH:14]P([O-])(O)=O.[K+].[O-]Cl=O.[Na+].[OH-].[Na+]>C1COCC1.CC(O)(C)C.O>[C:1]1([C:7]2[S:11][C:10]([C:12]([OH:14])=[O:13])=[CH:9][CH:8]=2)[CH:2]=[CH:3][CH:4]=[CH:5][CH:6]=1

参加物

8

反応物 4

HCID 14798Sodium HydroxideHCID 1770535-Phenylthiophene-2-carbaldehydeHCID 516951Monobasic potassium phosphateHCID 23668197Sodium Chlorite

生成物 1

HCID 7364945-Phenyl-2-Thiophenecarboxylic Acid収率 51%

試薬・触媒・溶媒 3

HCID 962Water溶媒2 回HCID 6386tert-Butanol溶媒HCID 8028Tetrahydrofuran溶媒

実験手順

5-Phenylthiophene-2-carboxaldehyde (750 mg, 4 mmol) is dissolved in a mixture of THF, tBuOH, and water (2:1:1, 60miL). KH2PO4 (1.36 g, 10 mmol) is added followed by NaClO2 (900 mg, 10 mmol). The mixture is stirred at rt for 5 days. Aqueous NaOH (2M, 10 mL) is added and a majority of the organic solvents are removed in vacuo yielding an aqueous suspension. This suspension is diluted with water and washed with three times with CH2Cl2. The aqueous layer is acidified to pH<2 with 25% H2SO4 and the product is extracted three times with CH2Cl2. The combined organic washes are dried over Na2SO4, filtered and concentrated in vacuo to yield 417 mg (51%) of 5-phenylthiophene-2-carboxylic acid. MS for C11H8O2S, (ES) m/z: 203 (M−H)−.

後処理

  1. customa majority of the organic solvents are removed in vacuo
  2. customyielding an aqueous suspension
  3. washwashed with three times with CH2Cl2
  4. extractionthe product is extracted three times with CH2Cl2
  5. dry with materialThe combined organic washes are dried over Na2SO4
  6. filtrationfiltered
  7. concentrationconcentrated in vacuo

出典と根拠

ORDレコード
ord-2d035e661b8c4b5bae83dc4b2ab6c958
出典データセット
uspto-grants-2003_05
特許番号
US06562816B2

関連ノート

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