Potassium Hydroxide → 4,6-Diisopropoxy-2-(trifluoromethyl)-3-pyridinecarboxylic acid

HRID 1251953ノート

反応式

HRID 1251953 の反応式
[CH:1]([O:4][C:5]1[CH:10]=[C:9]([O:11][CH:12]([CH3:14])[CH3:13])[N:8]=[C:7]([C:15]([F:18])([F:17])[F:16])[C:6]=1[C:19]([O:21]CC)=[O:20])([CH3:3])[CH3:2].[OH-].[K+]>CO>[CH:1]([O:4][C:5]1[CH:10]=[C:9]([O:11][CH:12]([CH3:14])[CH3:13])[N:8]=[C:7]([C:15]([F:18])([F:17])[F:16])[C:6]=1[C:19]([OH:21])=[O:20])([CH3:2])[CH3:3]

参加物

4

反応物 2

HCID 14797Potassium HydroxideHCID 13726788Ethyl 4,6-diisopropoxy-2-(trifluoromethyl)-3-pyridinecarboxylate

生成物 1

HCID 137267904,6-Diisopropoxy-2-(trifluoromethyl)-3-pyridinecarboxylic acid収率 73.6%

試薬・触媒・溶媒 1

HCID 887Methanol溶媒

実験手順

A mixture of 9.5 g (0.0283 mol) of product of Example 6, 10 g of KOH and 150 ml of methanol was held at reflux for 16 hours. Methanol was removed under reduced pressure. The residue was treated with 300 ml of water and extracted with ether. The aqueous layer was poured into 50 ml of concentrated HCl and extracted with ether. The ether extract was concentrated. The residue solid (7.7 g) was recrystallized from hexane-ether to give 6.4 g (73.6%) of acid product: mp 147°-150° C.

後処理

  1. temperatureat reflux for 16 hours
  2. customMethanol was removed under reduced pressure
  3. additionThe residue was treated with 300 ml of water
  4. extractionextracted with ether
  5. additionThe aqueous layer was poured into 50 ml of concentrated HCl
  6. extractionextracted with ether
  7. extractionThe ether extract
  8. concentrationwas concentrated
  9. customThe residue solid (7.7 g) was recrystallized from hexane-ether

出典と根拠

ORDレコード
ord-c069ba56468449c6a5ac9d7b864d0933
出典データセット
uspto-grants-1988_05
特許番号
US04741766

反応ノート

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