Acetic Acid → HCID 21186232、化合物

HRID 361455ノート

反応式

HRID 361455 の反応式
C(O)(=O)C.C[O:6][C:7]([CH:9]=[CH:10][C:11]1[CH:16]=[CH:15][C:14]([C:17]2[C:22]([S:23]([N:26](C(OCC(C)C)=O)[C:27]3[C:32]([O:33][CH3:34])=[N:31][C:30]([CH3:35])=[CH:29][N:28]=3)(=[O:25])=[O:24])=[CH:21][CH:20]=[CH:19][N:18]=2)=[CH:13][CH:12]=1)=[O:8].N(C([O-])=O)=NC([O-])=O.[K+].[K+]>C(COC)OC>[C:7]([CH2:9][CH2:10][C:11]1[CH:16]=[CH:15][C:14]([C:17]2[C:22]([S:23]([NH:26][C:27]3[C:32]([O:33][CH3:34])=[N:31][C:30]([CH3:35])=[CH:29][N:28]=3)(=[O:24])=[O:25])=[CH:21][CH:20]=[CH:19][N:18]=2)=[CH:13][CH:12]=1)([OH:8])=[O:6]

参加物

5

反応物 3

HCID 176Acetic AcidHCID 6096233Potassium diazene-1,2-dicarboxylateHCID 54341699HCID 54341699、化合物

生成物 1

HCID 21186232HCID 21186232、化合物収率 21.2%

試薬・触媒・溶媒 1

HCID 80711,2-Dimethoxyethane溶媒2 回

反応条件

温度
45 °C

実験手順

A 1M solution of acetic acid in dimethoxyethane (5.6 ml) was added dropwise over 3 hours to a mixture of 2-[4-(2-[methoxycarbonyl]vinyl)phenyl]-N-isobutoxycarbonyl-N-(3-methoxy-5-methylpyrazin-2-yl)pyridine-3-sulphonamide (250 mg) and potassium azodicarboxylate (1.4 g) in dry dimethoxyethane (20 ml) at 45° C. The mixture was heated at 45° C. for 18 hours. Insoluble material was removed by filtration and the filtrate was concentrated. The residue was eluted through a pad of silica gel with ethyl acetate/hexane (1:3 v/v) and the resulting solid (230 mg) was dissolved in a mixture of tetrahydrofuran (16 ml) and methanol (4 ml). A solution of lithium hydroxide (118 mg) in water (4 ml) was added and the solution was stirred for 18 hours. Volatile material was removed by evaporation and the residue was dissolved in water (15 ml). The solution was washed with ethyl acetate (2×15 ml) and acidified with 20% aqueous citric acid. The mixture was extracted with ethyl acetate (2×15 ml) and the extracts were washed with water (10 ml) and saturated sodium chloride solution (50 ml) and dried (MgSO4). Volatile material was removed by evaporation and the residue was triturated with ether to give 2-[4-(2-carboxyethyl)phenyl]-N-(3-methoxy-5-methylpyrazin-2-yl)pyridine-3-sulphonamide (42 mg), m.p. 166°-168° C.; 1H NMR (CDCl3): 2.25 (s, 3 H), 2.6 (t, 2 H), 3.0 (t, 2 H), 3.8 (s, 3 H), 7.2-7.3 (m, 5 H), 7.45-7.55 (m, 1 H), 8.65 (d, 1 H), 8.8 (d, 1 H), 10.25-10.5 (br, 1 H).

後処理

  1. customInsoluble material was removed by filtration
  2. concentrationthe filtrate was concentrated
  3. washThe residue was eluted through a pad of silica gel with ethyl acetate/hexane (1:3 v/v)
  4. dissolutionthe resulting solid (230 mg) was dissolved in a mixture of tetrahydrofuran (16 ml) and methanol (4 ml)
  5. additionA solution of lithium hydroxide (118 mg) in water (4 ml) was added
  6. customVolatile material was removed by evaporation
  7. dissolutionthe residue was dissolved in water (15 ml)
  8. washThe solution was washed with ethyl acetate (2×15 ml)
  9. extractionThe mixture was extracted with ethyl acetate (2×15 ml)
  10. washthe extracts were washed with water (10 ml) and saturated sodium chloride solution (50 ml)
  11. dry with materialdried (MgSO4)
  12. customVolatile material was removed by evaporation
  13. customthe residue was triturated with ether

出典と根拠

ORDレコード
ord-4fb127b10e66465aaa8ab9cfbff4a0d7
出典データセット
uspto-grants-1999_02
特許番号
US05866568

反応ノート

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