Methanol → HCID 101931782, compound

HRID 1030768

Reaction equation

HRID 1030768 reaction equation
[CH3:1][C@H:2]1[O:7][C@@H:6]([O:8][C@H:9]2[C@@H:14]([OH:15])[CH2:13][C@H:12]([O:16][C@H:17]3[C@@H:22]([OH:23])[CH2:21][C@H:20]([O:24][C@@H:25]4[CH2:30][C@H:29]5[CH2:31][CH2:32][C@H:33]6[C@@:38]7([OH:48])[CH2:39][CH2:40][C@H:41]([C:42]8[CH2:47][O:46][C:44](=[O:45])[CH:43]=8)[C@@:37]7([CH3:49])[C@H:36]([OH:50])[CH2:35][C@@H:34]6[C@@:28]5([CH3:51])[CH2:27][CH2:26]4)[O:19][C@@H:18]3[CH3:52])[O:11][C@@H:10]2[CH3:53])[CH2:5][C@H:4]([OH:54])[C@@H:3]1[OH:55].I([O-])(=O)(=O)=O.[Na+].I([O-])(=O)(=O)=O.CO>C(Cl)(Cl)Cl.CO>[CH3:52][C@H:18]1[O:19][C@@H:20]([O:24][C@@H:25]2[CH2:30][C@H:29]3[CH2:31][CH2:32][C@H:33]4[C@@:38]5([OH:48])[CH2:39][CH2:40][C@H:41]([C:42]6[CH2:47][O:46][C:44](=[O:45])[CH:43]=6)[C@@:37]5([CH3:49])[C@H:36]([OH:50])[CH2:35][C@@H:34]4[C@@:28]3([CH3:51])[CH2:27][CH2:26]2)[CH2:21][C@H:22]([OH:23])[C@@H:17]1[O:16][C@@H:12]1[O:11][C@H:10]([CH3:53])[C@@H:9]([O:8][CH:6]([O:7][CH:2]([CH:3]=[O:55])[CH3:1])[CH2:5][CH:4]=[O:54])[C@@H:14]([OH:15])[CH2:13]1

Participants

6

Reactant 4

HCID 887MethanolHCID 167232PeriodateHCID 2724385Digoxin2×HCID 23667635Sodium periodate

Product 1

HCID 101931782HCID 101931782, compound

Reagents, catalysts & solvents 1

HCID 21584188Chloroform methanolSolvent2×

Procedure

Digoxin (0.4985 g, 0.64 mmole) was dissolved in 10 ml of chloroform/methanol (3/1.5) and placed into a 100 ml two-necked flask. Sodium periodate (0.3102 g, 1.4 mmoles) was dissolved in 4 ml distilled water and placed into a pressure equalized addition funnel. The periodate solution was slowly added to the flask while stirring and under nitrogen. A white precipitate was immediately formed and the reaction was complete within 15 minutes after addition of the periodate. Reaction progress was monitored by TLC (E. M. Merck, pre-coated TLC sheets, silica gel 60 F254 0.2 mm thickness) in chloroform/methanol 10/1 by volume Rf 0.16=dialdehyde, one homogeneous spot; Rf 0.07=Digoxin. Both spots became dark brownish when the TLC plate was sprayed with methanol/concentrated sulfuric acid (9/1 by volume) and placed in an oven at 100° C. The reaction mixture was evaporated on a rotatory evaporator and brought up in 30 ml of chloroform and 3 ml of water. The cloudy solution was extracted and the aqueous layer washed three times with 10 ml chloroform. The organic phases are combined (60 ml) and dried over magnesium sulfate. The organic solvents are evaporated to dryness. A light yellow brownish oily material was left. This material was used immediately in the next reaction.

Workup

  1. customplaced into a 100 ml two-necked flask
  2. distillationdistilled water
  3. additionaddition funnel
  4. additionThe periodate solution was slowly added to the flask
  5. customA white precipitate was immediately formed
  6. customReaction progress
  7. customplaced in an oven at 100° C
  8. customThe reaction mixture was evaporated on a rotatory evaporator
  9. extractionThe cloudy solution was extracted
  10. washthe aqueous layer washed three times with 10 ml chloroform
  11. dry with materialdried over magnesium sulfate
  12. customThe organic solvents are evaporated to dryness
  13. waitA light yellow brownish oily material was left
  14. customThis material was used immediately in the next reaction

Sources & evidence

ORD record
ord-c5ddd92d08ab40ec9652da27f183b056
Source dataset
uspto-grants-1992_04
Patent number
US05106963

Linked notes

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