Potassium Hydroxide → HCID 59382257、化合物

HRID 41377ノート

反応式

HRID 41377 の反応式
[CH3:1][CH:2]([C:6]1[CH:7]=[C:8]([CH:14]=[CH:15][C:16]=1[OH:17])[C:9]([O:11]CC)=[O:10])[C:3]([CH3:5])=[CH2:4].[OH-].[K+]>CO.O>[CH3:1][CH:2]([C:6]1[CH:7]=[C:8]([CH:14]=[CH:15][C:16]=1[OH:17])[C:9]([OH:11])=[O:10])[C:3]([CH3:5])=[CH2:4]

参加物

5

反応物 2

HCID 14797Potassium HydroxideHCID 59382270Ethyl 3-(1,2-dimethyl-allyl)-4-hydroxy-benzoate

生成物 1

HCID 59382257HCID 59382257、化合物収率 51.1%

試薬・触媒・溶媒 2

HCID 887Methanol溶媒2 回HCID 962Water溶媒

実験手順

Ethyl 3-(1,2-dimethyl-allyl)-4-hydroxy-benzoate (600 mg, 2.56 mmol) was dissolved in methanol (20 ml), a solution of potassium hydroxide (560 mg, 10.0 mmol) in water (10 ml) was added and the mixture was stirred and held at reflux for 16 hours. Upon cooling the methanol was removed in vacuo and the solution acidified to pH 2 or below by the addition of 2M hydrochloric acid. The solution was extracted with dichloromethane, the organic layer was separated and the solvent was removed in vacuo to afford 3-(1,2-dimethyl-allyl)-4-hydroxy-benzoic acid (270 mg, 51%) as a colourless gum. 1H NMR (DMSO-d6) 12.38 (1H, br s), 10.22 (1H, br s), 7.63 (2H, m), 6.88 (1H, d), 4.90 (1H, s), 4.87 (1H, s), 3.75 (1H, q), 1.60 (3H, s), 1.28 (3H, d). MS: [M−H]+ 205.

後処理

  1. temperatureat reflux for 16 hours
  2. customwas removed in vacuo
  3. additionthe solution acidified to pH 2 or below by the addition of 2M hydrochloric acid
  4. extractionThe solution was extracted with dichloromethane
  5. customthe organic layer was separated
  6. customthe solvent was removed in vacuo

出典と根拠

ORDレコード
ord-231ed56117774bd7a8ae50ec12db25b5
出典データセット
uspto-grants-2013_09
特許番号
US08530469B2

反応ノート

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