Hydrochloric Acid → (3R,4R,5R)-1-benzyl-3-benzyloxy-5-hydroxymethylpiperidin-4-ol

HRID 1003376노트

반응식

HRID 1003376 반응식
[CH2:1]([O:8][C@@H:9]1[C@@H:15](CO)[O:14][CH:12](O)[C@H:11]([CH2:18]O)[C@H:10]1[OH:20])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.I([O-])(=O)(=O)=O.[Na+].[CH2:27]([NH2:34])[C:28]1[CH:33]=[CH:32][CH:31]=[CH:30][CH:29]=1.C([BH3-])#N.[Na+].Cl>CO.O>[CH2:27]([N:34]1[CH2:18][C@H:11]([CH2:12][OH:14])[C@@H:10]([OH:20])[C@H:9]([O:8][CH2:1][C:2]2[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=2)[CH2:15]1)[C:28]1[CH:33]=[CH:32][CH:31]=[CH:30][CH:29]=1

참가 물질

8

반응물 5

HCID 313Hydrochloric AcidHCID 7504BenzylamineHCID 5003444Sodium cyanoborohydrideHCID 152354784-O-Benzyl-2-deoxy-2-C-hydroxymethyl-D-glucopyranoseHCID 23667635Sodium periodate

생성물 1

HCID 54015409(3R,4R,5R)-1-benzyl-3-benzyloxy-5-hydroxymethylpiperidin-4-ol수율 25%

시약·촉매·용매 2

HCID 887Methanol용매HCID 962Water용매

반응 조건

온도
46 °C

실험 절차

4-O-Benzyl-2-deoxy-2-C-hydroxymethyl-D-glucopyranose (6.0 g, 21.1 mmol) (preparation see WO 95/24391) was dissolved in methanol (200 ml). Sodium periodate (21.4 g, 100 mmol) in water (200 ml) was added dropwise over 15 min. The mixture was stirred at 45-47° C. for 3.5 h. The precipitate was filtered off and the mixture was concentrated and purified by flash chromatography on silica gel using ethyl acetate as eluent. The purified product of 4-O-benzyl-2-deoxy-2-C-hydroxymethyl-D-xylo-pentodialdose was dissolved in methanol (50 ml) and benzyl amine (4.36 g, 40.7 mmol) and sodium cyanoborohydride (1.0 g, 15.9 mmol) was added. The mixture was stirred at room temperature for 3 days. Subsequently the mixture was acidified to pH=2 with conc. hydrochloric acid and evaporated to dryness. The residue was dissolved in water (50 ml), pH was adjusted to 10 with aqueous sodium hydroxide and the solution was extracted with methylene chloride. The organic phase was dried over magnesium sulphate, evaporated and purified on silica gel using ethyl acetate as eluent. This afforded (3R,4R,5R)-1-benzyl-3-benzyloxy-5-hydroxymethylpiperidin-4-ol as an oil (Yield: 25%).

후처리

  1. filtrationThe precipitate was filtered off
  2. concentrationthe mixture was concentrated
  3. custompurified by flash chromatography on silica gel
  4. dissolutionThe purified product of 4-O-benzyl-2-deoxy-2-C-hydroxymethyl-D-xylo-pentodialdose was dissolved in methanol (50 ml)
  5. stirringThe mixture was stirred at room temperature for 3 days
  6. customevaporated to dryness
  7. dissolutionThe residue was dissolved in water (50 ml)
  8. extractionthe solution was extracted with methylene chloride
  9. dry with materialThe organic phase was dried over magnesium sulphate
  10. customevaporated
  11. custompurified on silica gel

출처 및 근거

ORD 기록
ord-28d58b4099434502bc3fc034b5f2b703
출처 데이터셋
uspto-grants-2000_04
특허 번호
US06046214

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