Hydrochloric Acid → 5-[5-(3,5-Dichloro-phenyl)-5-trifluoromethyl-4,5-dihydro-isoxazol-3-yl]-3-methyl-thiophene-2-carboxylic acid

HRID 242405ノート

反応式

HRID 242405 の反応式
[Li+].[OH-].C([O:5][C:6]([C:8]1[S:9][C:10]([C:14]2[CH2:18][C:17]([C:23]3[CH:28]=[C:27]([Cl:29])[CH:26]=[C:25]([Cl:30])[CH:24]=3)([C:19]([F:22])([F:21])[F:20])[O:16][N:15]=2)=[CH:11][C:12]=1[CH3:13])=[O:7])C.Cl>C1COCC1.O>[Cl:30][C:25]1[CH:24]=[C:23]([C:17]2([C:19]([F:20])([F:22])[F:21])[O:16][N:15]=[C:14]([C:10]3[S:9][C:8]([C:6]([OH:7])=[O:5])=[C:12]([CH3:13])[CH:11]=3)[CH2:18]2)[CH:28]=[C:27]([Cl:29])[CH:26]=1

参加物

6

反応物 3

HCID 313Hydrochloric AcidHCID 3939Lithium Hydroxide2 回HCID 665872885-[5-(3,5-Dichloro-phenyl)-5-trifluoromethyl-4,5-dihydro-isoxazol-3-yl]-3-methyl-thiophene-2-carboxylic acid ethyl ester

生成物 1

HCID 674288635-[5-(3,5-Dichloro-phenyl)-5-trifluoromethyl-4,5-dihydro-isoxazol-3-yl]-3-methyl-thiophene-2-carboxylic acid収率 100.4%

試薬・触媒・溶媒 2

HCID 962Water溶媒HCID 8028Tetrahydrofuran溶媒2 回

反応条件

温度
50 °C

実験手順

LiOH (3.2 g) is added to a solution of 5-[5-(3,5-dichloro-phenyl)-5-trifluoromethyl-4,5-dihydro-isoxazol-3-yl]-3-methyl-thiophene-2-carboxylic acid ethyl ester (9.88 g) in a mixture of THF and water (240 ml, 9:1). After 16 hours at room temperature, LiOH (1.05 g) and THF (150 ml) was added. The reaction mixture was heated at 50° C. for 10 hours. HCl (2N) was added to the reaction mixture until pH 1-2 was obtained. The mixture was then extracted three times with ethyl acetate. The organic phases were combined, washed with water and a saturated aqueous solution of NaCl, dried over Na2SO4 and concentrated in vacuo to yield 5-[5-(3,5-dichloro-phenyl)-5-trifluoromethyl-4,5-dihydro-isoxazol-3-yl]-3-methyl-thiophene-2-carboxylic acid (9.3 g) as brown resin. The crude product is used without further purification.

後処理

  1. customwas obtained
  2. extractionThe mixture was then extracted three times with ethyl acetate
  3. washwashed with water
  4. dry with materiala saturated aqueous solution of NaCl, dried over Na2SO4
  5. concentrationconcentrated in vacuo

出典と根拠

ORDレコード
ord-d30bf15524f84135b4c861a8c859bb4b
出典データセット
uspto-grants-2014_02
特許番号
US08653116B2

反応ノート

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