2,2'-Bipyridine → 5-{4-[2-Hydroxy-2-(2-methoxyphenyl)ethoxy]benzyl}-1,3-thiazolidine-2,4-dione

HRID 1873822ノート

反応式

HRID 1873822 の反応式
[OH:1][CH:2]([C:19]1[CH:24]=[CH:23][CH:22]=[CH:21][C:20]=1[O:25][CH3:26])[CH2:3][O:4][C:5]1[CH:18]=[CH:17][C:8](/[CH:9]=[C:10]2/[C:11](=[O:16])[NH:12][C:13](=[O:15])[S:14]/2)=[CH:7][CH:6]=1.N1C=CC=CC=1C1C=CC=CN=1.[BH4-].[Na+].[BH4-]>C1COCC1.[Co](Cl)Cl.CC(O)=O.O>[OH:1][CH:2]([C:19]1[CH:24]=[CH:23][CH:22]=[CH:21][C:20]=1[O:25][CH3:26])[CH2:3][O:4][C:5]1[CH:18]=[CH:17][C:8]([CH2:9][CH:10]2[S:14][C:13](=[O:15])[NH:12][C:11]2=[O:16])=[CH:7][CH:6]=1

参加物

9

反応物 4

HCID 14742,2'-BipyridineHCID 28123BorohydrideHCID 4311764Sodium borohydrideHCID 86645078(5Z)-5-{4-[2-hydroxy-2-(2-methoxyphenyl)ethoxy]benzylidene}-1,3-thiazolidine-2,4-dione

生成物 1

HCID 469110385-{4-[2-Hydroxy-2-(2-methoxyphenyl)ethoxy]benzyl}-1,3-thiazolidine-2,4-dione収率 63%

試薬・触媒・溶媒 4

HCID 24288Cobalt(II) chloride触媒HCID 176Acetic Acid溶媒HCID 962Water溶媒HCID 8028Tetrahydrofuran溶媒2 回

反応条件

温度
0 °C

実験手順

(5Z)-5-{4-[2-hydroxy-2-(2-methoxyphenyl)ethoxy]benzylidene}-1,3-thiazolidine-2,4-dione (1.00 g, 2.69 mmol) was dissolved in THF (20 ml). Water (20 ml) was added and then sufficient additional THF was added to give a clear solution. A small crystal of cobalt chloride was added followed by 2,2′-bipyridine (95 mg, 0.61 mmol). The reaction mixture was cooled to 0° C. NaBH4 was added in portions until the blue color persisted. The color gradually faded and was regenerated repeatedly by small additions of borohydride and HOAc. When HPLC indicated that the reaction was complete the reaction mixture was partitioned between EtOAc and H2O. HOAc was added until the pH of the aqueous phase was ca. 6, and the aqueous phase was extracted with EtOAc. The combined organic phases were washed with brine, dried (Na2SO4), filtered and evaporated in vacuo. The residue was chromatographed on a small silica gel column eluting with 20% EtOAc/DCM. Fractions containing product were combined and evaporated in vacuo to give 0.63 g (63%) of the title compound as a white solid. MS (ESI−) for C19H19NO5S m/z 372.1 (M−H)−.

後処理

  1. customto give a clear solution
  2. customwas partitioned between EtOAc and H2O
  3. additionHOAc was added until the pH of the aqueous phase
  4. extractionthe aqueous phase was extracted with EtOAc
  5. washThe combined organic phases were washed with brine
  6. dry with materialdried (Na2SO4)
  7. filtrationfiltered
  8. customevaporated in vacuo
  9. customThe residue was chromatographed on a small silica gel column
  10. washeluting with 20% EtOAc/DCM
  11. additionFractions containing product
  12. customevaporated in vacuo

出典と根拠

ORDレコード
ord-9b7f4630078a482e872afdb84d4e3c67
出典データセット
uspto-grants-2012_11
特許番号
US08304441B2

反応ノート

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