Hydrogen Bromide → alpha-D-Glucopyranosyl bromide, tetraacetate

HRID 1376923Notes

Reaction equation

HRID 1376923 reaction equation
[C:1]([O:4][C@H:5]([C@H:8]([C@@H:13]([C@@H:18]([CH2:23][O:24][C:25](=[O:27])[CH3:26])[O:19][C:20](=O)C)[O:14][C:15](=[O:17])[CH3:16])[O:9][C:10](=[O:12])[CH3:11])C=O)(=[O:3])[CH3:2].[BrH:28]>C(O)(=O)C>[CH3:26][C:25]([O:24][CH2:23][C@H:18]1[O:19][C@H:20]([Br:28])[C@H:5]([O:4][C:1]([CH3:2])=[O:3])[C@@H:8]([O:9][C:10]([CH3:11])=[O:12])[C@@H:13]1[O:14][C:15]([CH3:16])=[O:17])=[O:27]

Participants

4

Reactant 2

HCID 260Hydrogen BromideHCID 92972D-Glucose, 2,3,4,5,6-pentaacetate

Product 1

HCID 101776alpha-D-Glucopyranosyl bromide, tetraacetateYield 74%

Reagents, catalysts & solvents 1

HCID 176Acetic AcidSolvent

Procedure

First, 14 g of glucose pentaacetate, from Sigma Chemical Company, was dissolved in 60 ml of 30% HBr in acetic acid and allowed to stand a 4° C. for 69 hours. The acetic acid was removed. The residue was dissolved in 100 ml of chloroform, washed twice with 100 ml of saturated NaHCO3, dried over MgSO4, concentrated, and crystallized from 95% ethanol to give 10.88 g (74%) of acetobromoglucose.

Workup

  1. customThe acetic acid was removed
  2. dissolutionThe residue was dissolved in 100 ml of chloroform
  3. washwashed twice with 100 ml of saturated NaHCO3
  4. dry with materialdried over MgSO4
  5. concentrationconcentrated
  6. customcrystallized from 95% ethanol

Sources & evidence

ORD record
ord-02b1df1593694125a48703d71a40c7a2
Source dataset
uspto-grants-1997_09
Patent number
US05663377

Reaction notes

Loading…