Hydrochloric Acid → 4-{[4-(3-Chloropropoxy)-2-methylphenyl]methyl}-5-isopropyl-3-(2,3,4,6-tetra-O-pivaloyl-beta-D-glucopyranosyloxy)-1H-pyrazole

HRID 1869023Notes

Reaction equation

HRID 1869023 reaction equation
[OH:1][C:2]1[CH:7]=[CH:6][C:5]([CH2:8][C:9]2[C:10]([O:17][C@@H:18]3[O:44][C@H:43]([CH2:45][O:46][C:47](=[O:52])[C:48]([CH3:51])([CH3:50])[CH3:49])[C@@H:35]([O:36][C:37](=[O:42])[C:38]([CH3:41])([CH3:40])[CH3:39])[C@H:27]([O:28][C:29](=[O:34])[C:30]([CH3:33])([CH3:32])[CH3:31])[C@H:19]3[O:20][C:21](=[O:26])[C:22]([CH3:25])([CH3:24])[CH3:23])=[N:11][NH:12][C:13]=2[CH:14]([CH3:16])[CH3:15])=[C:4]([CH3:53])[CH:3]=1.Br[CH2:55][CH2:56][CH2:57][Cl:58].[OH-].[Na+].Cl>[Br-].C([N+](CCCC)(CCCC)CCCC)CCC.O1CCCC1>[Cl:58][CH2:57][CH2:56][CH2:55][O:1][C:2]1[CH:7]=[CH:6][C:5]([CH2:8][C:9]2[C:10]([O:17][C@@H:18]3[O:44][C@H:43]([CH2:45][O:46][C:47](=[O:52])[C:48]([CH3:51])([CH3:50])[CH3:49])[C@@H:35]([O:36][C:37](=[O:42])[C:38]([CH3:39])([CH3:41])[CH3:40])[C@H:27]([O:28][C:29](=[O:34])[C:30]([CH3:31])([CH3:32])[CH3:33])[C@H:19]3[O:20][C:21](=[O:26])[C:22]([CH3:25])([CH3:23])[CH3:24])=[N:11][NH:12][C:13]=2[CH:14]([CH3:16])[CH3:15])=[C:4]([CH3:53])[CH:3]=1

Participants

7

Reactant 4

HCID 313Hydrochloric AcidHCID 80061-Bromo-3-chloropropaneHCID 14798Sodium HydroxideHCID 685373584-[(4-Hydroxy-2-methylphenyl)methyl]-5-isopropyl-3-(2,3,4,6-tetra-O-pivaloyl-beta-D-glucopyranosyloxy)-1H-pyrazole

Product 1

HCID 689441234-{[4-(3-Chloropropoxy)-2-methylphenyl]methyl}-5-isopropyl-3-(2,3,4,6-tetra-O-pivaloyl-beta-D-glucopyranosyloxy)-1H-pyrazole

Reagents, catalysts & solvents 2

HCID 74236Tetrabutylammonium BromideCatalystHCID 8028TetrahydrofuranSolvent

Procedure

To a solution of 4-[(4-hydroxy-2-methylphenyl)-methyl]-5-isopropyl-3-(2,3,4,6-tetra-O-pivaloyl-β-D-glucopyranosyloxy)-1H-pyrazole (8.58 g), 1-bromo-3-chloropropane (2.85 mL) and tetra(n-butyl)ammonium bromide (1.86 g) in tetrahydrofuran (43 mL) was added 5 mol/L aqueous sodium hydroxide solution (5.76 mL), and the mixture was stirred at room temperature overnight. The reaction mixture was poured into 1 mol/L hydrochloric acid, and the resulting mixture was extracted with diethyl ether. The extract was washed with 1 mol/L hydrochloric acid, water and brine successively, and dried over anhydrous sodium sulfate. The solvent was removed under reduced pressure, and the residue was dissolved in n-hexane (15 mL)-diisopropyl ether (5 mL) under reflux condition. The solution was cooled to room temperature, and n-hexane (25 mL) was added to the solution. The precipitated crystals were collected by filtration, and the crystals were washed with n-hexane and dried under reduced pressure to give the title compound (6.06 g).

Workup

  1. extractionthe resulting mixture was extracted with diethyl ether
  2. washThe extract was washed with 1 mol/L hydrochloric acid, water and brine successively
  3. dry with materialdried over anhydrous sodium sulfate
  4. customThe solvent was removed under reduced pressure
  5. dissolutionthe residue was dissolved in n-hexane (15 mL)-diisopropyl ether (5 mL)
  6. temperatureunder reflux condition
  7. temperatureThe solution was cooled to room temperature
  8. additionn-hexane (25 mL) was added to the solution
  9. filtrationThe precipitated crystals were collected by filtration
  10. washthe crystals were washed with n-hexane
  11. customdried under reduced pressure

Sources & evidence

ORD record
ord-4204abc68ef64a04b5820d2a48b1349d
Source dataset
uspto-grants-2009_12
Patent number
US07635684B2

Reaction notes

Loading…