Hydrogen Bromide → 4-{4-Cyclopropyl-5-[3-(2,2-dimethylpropyl)cyclobutyl]isoxazol-3-yl}-5-(2,4-dimethylphenylcarbamoyl)valeric acid

HRID 1912080ノート

反応式

HRID 1912080 の反応式
[CH:1]1([C:4]2[C:5]([CH:18]([CH2:25][C:26](=[O:36])[NH:27][C:28]3[CH:33]=[CH:32][C:31]([CH3:34])=[CH:30][C:29]=3[CH3:35])[CH2:19][CH2:20][C:21]([O:23]C)=[O:22])=[N:6][O:7][C:8]=2[CH:9]2[CH2:12][CH:11]([CH2:13][C:14]([CH3:17])([CH3:16])[CH3:15])[CH2:10]2)[CH2:3][CH2:2]1.Br.C([O-])(=O)C.[Na+]>C(O)(=O)C>[CH:1]1([C:4]2[C:5]([CH:18]([CH2:25][C:26](=[O:36])[NH:27][C:28]3[CH:33]=[CH:32][C:31]([CH3:34])=[CH:30][C:29]=3[CH3:35])[CH2:19][CH2:20][C:21]([OH:23])=[O:22])=[N:6][O:7][C:8]=2[CH:9]2[CH2:12][CH:11]([CH2:13][C:14]([CH3:16])([CH3:17])[CH3:15])[CH2:10]2)[CH2:3][CH2:2]1

参加物

5

反応物 3

HCID 260Hydrogen BromideHCID 517045Sodium AcetateHCID 71114790Methyl 4-{4-cyclopropyl-5-[3-(2,2-dimethylpropyl)cyclobutyl]isoxazol-3-yl}-5-(2,4-dimethylphenylcarbamoyl)valerate

生成物 1

HCID 711147944-{4-Cyclopropyl-5-[3-(2,2-dimethylpropyl)cyclobutyl]isoxazol-3-yl}-5-(2,4-dimethylphenylcarbamoyl)valeric acid収率 97.5%

試薬・触媒・溶媒 1

HCID 176Acetic Acid溶媒

実験手順

Methyl 4-{4-cyclopropyl-5-[3-(2,2-dimethylpropyl)cyclobutyl]isoxazol-3-yl}-5-(2,4-dimethylphenylcarbamoyl)valerate (115 mg) and acetic acid (1.2 mL) were mixed. To the mixture was added 47% hydrobromic acid (0.6 mL) at 10° C. The mixture was stirred at RT and further stirred at 60° C. To the reaction mixture was added sodium acetate (492 mg) at ice temperature. The mixture was extracted with ethyl acetate. The organic layer was washed with water and brine, then dried over magnesium sulfate. The magnesium sulfate was filtered off and the filtrate was concentrated in vacuo. The resultant residue was purified by preparative chromatography (Eluent: methanol/chloroform/acetic acid=1/20/0.05) to give the title compound (109 mg). The resulting title compound was analyzed using a chiral column. The retention time of the title compound was 24.7 min., and the optical purity thereof was 94.9% ee.

後処理

  1. stirringfurther stirred at 60° C
  2. extractionThe mixture was extracted with ethyl acetate
  3. washThe organic layer was washed with water and brine
  4. dry with materialdried over magnesium sulfate
  5. filtrationThe magnesium sulfate was filtered off
  6. concentrationthe filtrate was concentrated in vacuo
  7. customThe resultant residue was purified by preparative chromatography (Eluent: methanol/chloroform/acetic acid=1/20/0.05)

出典と根拠

ORDレコード
ord-d2fa317a9ba7415dbd712524364e4de5
出典データセット
uspto-grants-2013_12
特許番号
US08604069B2

反応ノート

読み込み中…