Acetic Acid → 2-Benzyloxy-5-(2-nitro-ethyl)pyridine

HRID 78287

反応式

HRID 78287 の反応式
[CH2:1]([O:8][C:9]1[CH:14]=[CH:13][C:12](/[CH:15]=[CH:16]/[N+:17]([O-:19])=[O:18])=[CH:11][N:10]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.C(O)(=O)C.[B-].[Na+].O>CS(C)=O>[CH2:1]([O:8][C:9]1[CH:14]=[CH:13][C:12]([CH2:15][CH2:16][N+:17]([O-:19])=[O:18])=[CH:11][N:10]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1

参加物

6

反応物 4

HCID 176Acetic AcidHCID 962WaterHCID 22959485VertellusHCID 566051462-(Benzyloxy)-5-[(E)-2-nitroethenyl]pyridine

生成物 1

HCID 592550692-Benzyloxy-5-(2-nitro-ethyl)pyridine収率 40.7%

試薬・触媒・溶媒 1

HCID 679Dimethyl Sulfoxide溶媒

実験手順

To a solution of 2-benzyloxy-5-((E)-2-nitro-vinyl)-pyridine described in Manufacturing Example 231-1-3 (44.0 g, 172 mmol) and acetic acid (44.0 mL) in dimethyl sulfoxide (200 mL) was added sodium borohydrate (11.0 g, 275 mmol) at room temperature while cooling appropriately under nitrogen atmosphere, which was stirred for 30 minutes. Water was added to this reaction solution at room temperature while cooling appropriately, which was then partitioned into water and ethyl acetate. The organic layer was separated, washed with water and saturated aqueous sodium chloride, dried over anhydrous magnesium sulfate, and then filtered. The filtrate was concentrated under a reduced pressure. The residue was purified by NH silica gel column chromatography (ethyl acetate:heptane=1:4) to obtain the title compound (18.1 g, 40.7%).

後処理

  1. temperaturewhile cooling appropriately under nitrogen atmosphere
  2. temperaturewhile cooling appropriately
  3. customwhich was then partitioned into water and ethyl acetate
  4. customThe organic layer was separated
  5. washwashed with water and saturated aqueous sodium chloride
  6. dry with materialdried over anhydrous magnesium sulfate
  7. filtrationfiltered
  8. concentrationThe filtrate was concentrated under a reduced pressure
  9. customThe residue was purified by NH silica gel column chromatography (ethyl acetate:heptane=1:4)

出典と根拠

ORDレコード
ord-a18c599c3461453e87d6688ff1090134
出典データセット
uspto-grants-2014_09
特許番号
US08841327B2

関連ノート

読み込み中…