Hexane → 2,3,4,6-tetra-O-benzyl-1-C-{4-chloro-3-[(4-ethoxy-2-methylphenyl)(hydroxy)methyl]phenyl}-5-thio-D-glucopyranose

HRID 604752Notes

Reaction equation

HRID 604752 reaction equation
CCCCCC.Br[C:8]1[CH:13]=[CH:12][C:11]([O:14][CH2:15][CH3:16])=[CH:10][C:9]=1[CH3:17].[CH2:18]([O:25][C@@H:26]1[C@@H:32]([O:33][CH2:34][C:35]2[CH:40]=[CH:39][CH:38]=[CH:37][CH:36]=2)[C@H:31]([O:41][CH2:42][C:43]2[CH:48]=[CH:47][CH:46]=[CH:45][CH:44]=2)[C@@H:30]([CH2:49][O:50][CH2:51][C:52]2[CH:57]=[CH:56][CH:55]=[CH:54][CH:53]=2)[S:29][C:27]1([C:58]1[CH:63]=[CH:62][C:61]([Cl:64])=[C:60]([CH:65]=[O:66])[CH:59]=1)[OH:28])[C:19]1[CH:24]=[CH:23][CH:22]=[CH:21][CH:20]=1.[Cl-].[NH4+]>O1CCCC1>[CH2:18]([O:25][C@@H:26]1[C@@H:32]([O:33][CH2:34][C:35]2[CH:36]=[CH:37][CH:38]=[CH:39][CH:40]=2)[C@H:31]([O:41][CH2:42][C:43]2[CH:48]=[CH:47][CH:46]=[CH:45][CH:44]=2)[C@@H:30]([CH2:49][O:50][CH2:51][C:52]2[CH:53]=[CH:54][CH:55]=[CH:56][CH:57]=2)[S:29][C:27]1([C:58]1[CH:63]=[CH:62][C:61]([Cl:64])=[C:60]([CH:65]([C:8]2[CH:13]=[CH:12][C:11]([O:14][CH2:15][CH3:16])=[CH:10][C:9]=2[CH3:17])[OH:66])[CH:59]=1)[OH:28])[C:19]1[CH:20]=[CH:21][CH:22]=[CH:23][CH:24]=1

Participants

6

Reactant 4

HCID 8058HexaneHCID 25517Ammonium ChlorideHCID 109666Benzene, 1-bromo-4-ethoxy-2-methyl-HCID 11989086HCID 11989086, compound

Product 1

HCID 670690932,3,4,6-tetra-O-benzyl-1-C-{4-chloro-3-[(4-ethoxy-2-methylphenyl)(hydroxy)methyl]phenyl}-5-thio-D-glucopyranoseYield 95%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent2×

Procedure

Then, 2.6 M n-butylithium hexane solution (1.6 mL) was added to a mixture of 1-bromo-4-ethoxy-2-methylbenzene (0.94 g, 4.37 mmol) and tetrahydrofuran (12 mL) at −78° C. After stirred for one hour, the mixture was added with a tetrahydrofuran (10 mL) solution of 2,3,4,6-tetra-O-benzyl-1-C-(4-chloro-3-formylphenyl)-5-thio-D-glucopyranose (1.52 g, 2.18 mmol), and, further stirred for 20 minutes, and the reaction mixture was warmed to room temperature. After the reaction mixture was added with a saturated ammonium chloride aqueous solution and extracted with ethyl acetate, the organic phase was washed with brine and dried with anhydrous magnesium sulfate. After the desiccant was filtered off, the residue obtained by evaporating the solvent under reduced pressure was purified by silica gel column chromatography (hexane:ethyl acetate=2:1) to obtain 2,3,4,6-tetra-O-benzyl-1-C-{4-chloro-3-[(4-ethoxy-2-methylphenyl)(hydroxy)methyl]phenyl}-5-thio-D-glucopyranose (1.72 g, 95%) as a yellow amorphous diastereomer mixture.

Workup

  1. stirringfurther stirred for 20 minutes
  2. extractionextracted with ethyl acetate
  3. washthe organic phase was washed with brine
  4. dry with materialdried with anhydrous magnesium sulfate
  5. filtrationAfter the desiccant was filtered off
  6. customthe residue obtained
  7. customby evaporating the solvent under reduced pressure
  8. customwas purified by silica gel column chromatography (hexane:ethyl acetate=2:1)

Sources & evidence

ORD record
ord-2e73a832013144ff8e37c8e1de40aad6
Source dataset
uspto-grants-2011_03
Patent number
US07910619B2

Reaction notes

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