Hydrochloric Acid → HCID 54435224, compound

HRID 434266Notes

Reaction equation

HRID 434266 reaction equation
[CH2:1]([O:8][C@:9]1([CH:37]=[CH2:38])[C@@H:13]([CH2:14][O:15][CH2:16][C:17]2[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=2)[O:12][C@@H:11]([N:23]2[CH:31]=[C:29]([CH3:30])[C:27](=[O:28])[NH:26][C:24]2=[O:25])[C@@H:10]1[O:32]S(C)(=O)=O)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.O.[OH-].[Na+].Cl>C(O)C>[CH2:1]([O:8][C@:9]1([CH:37]=[CH2:38])[C@@H:13]([CH2:14][O:15][CH2:16][C:17]2[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=2)[O:12][C@@H:11]([N:23]2[CH:31]=[C:29]([CH3:30])[C:27](=[O:28])[NH:26][C:24]2=[O:25])[C@H:10]1[OH:32])[C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=1

Participants

6

Reactant 4

HCID 313Hydrochloric AcidHCID 962WaterHCID 14798Sodium HydroxideHCID 15332425HCID 15332425, compound

Product 1

HCID 54435224HCID 54435224, compoundYield 74.4%

Reagents, catalysts & solvents 1

HCID 702EthanolSolvent

Procedure

A solution of nucleoside 25 (2.53 g, 4.66 mmol) in a mixture of ethanol (50 cm3), water (50 cm3) and 1 M aqueous sodium hydroxide (15 cm3) was stirred under reflux for 16 h. The mixture was neutralised using dilute aqueous hydrochloric acid, the solvent was evaporated under reduced pressure, and the residue was extracted with dichloromethane (3×120 cm3). The combined extract was washed with saturated aqueous sodium hydrogencarbonate (3×150 cm3) and dried (Na2SO4). The solvent was removed under reduced pressure and the residue was purified by silica gel column chromatography using dichloromethane/methanol (99:1) as eluent to give 26 as a white foam (1.61 g, 74%). δH (CDCl3) 9.89 (1H, br s, NH), 7.50 (1H, d, J 1.1, 6-H), 7.41-7.26 (Bn), 6.28 (1H, d, J 2.8, 1′-H), 6.05 (1H, dd, J 11.1, 17.9, 1″-H), 5.58-5.50 (2H, m, 2″-Ha, 2″-Hb), 4.98 (1H, d, J 9.0, 2′-OH), 4.64-4.31 (6H, m, 2′-H, 4′-H, Bn), 3.73 (2H, m, 5′-Ha, 5′-Hb), 1.73 (1H, d, J 0.6, CH3). δC (CDCl3) 165.1 (C-4), 150.5 (C-2), 138.4, 138.0, 136.7 (C-6, Bn), 130.4 (C-1″), 128.8, 128.6, 128.5, 128.1, 128.0, 127.8 (Bn), 120.6 (C-2″), 108.1 (C-5), 88.6 (C-1′), 87.9 (C-3′), 87.2 (C-4′), 73.7 (C-2′), 71.8 (C-5′), 69.7, 66.3 (Bn), 12.3 (CH3). Found: C, 66.8; H, 6.2; N, 5.9; C26H28N2O8 requires C, 67.2; H, 6.1; N, 6.0.

Workup

  1. temperatureunder reflux for 16 h
  2. customthe solvent was evaporated under reduced pressure
  3. extractionthe residue was extracted with dichloromethane (3×120 cm3)
  4. extractionThe combined extract
  5. washwas washed with saturated aqueous sodium hydrogencarbonate (3×150 cm3)
  6. dry with materialdried (Na2SO4)
  7. customThe solvent was removed under reduced pressure
  8. customthe residue was purified by silica gel column chromatography

Sources & evidence

ORD record
ord-ddb80f01264c43f8955147a11ffc82ab
Source dataset
uspto-grants-2003_12
Patent number
US06670461B1

Reaction notes

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