Pyridine → HCID 11072048, compound

HRID 1720175Notes

Reaction equation

HRID 1720175 reaction equation
N1C=CC=CC=1.[F:7][C:8]([F:21])([F:20])[S:9]([O:12]S(C(F)(F)F)(=O)=O)(=[O:11])=[O:10].[CH2:22]([O:29][C@@H:30]1[C@@H:37]([O:38][CH2:39][C:40]2[CH:45]=[CH:44][CH:43]=[CH:42][CH:41]=2)[C@H:36]([O:46][CH2:47][C:48]2[CH:53]=[CH:52][CH:51]=[CH:50][CH:49]=2)[C@@H:35]([CH2:54]O)[O:34][C@@H:31]1[O:32][CH3:33])[C:23]1[CH:28]=[CH:27][CH:26]=[CH:25][CH:24]=1>C(Cl)Cl>[CH2:22]([O:29][C@@H:30]1[C@@H:37]([O:38][CH2:39][C:40]2[CH:41]=[CH:42][CH:43]=[CH:44][CH:45]=2)[C@H:36]([O:46][CH2:47][C:48]2[CH:53]=[CH:52][CH:51]=[CH:50][CH:49]=2)[C@@H:35]([CH2:54][O:12][S:9]([C:8]([F:21])([F:20])[F:7])(=[O:11])=[O:10])[O:34][C@@H:31]1[O:32][CH3:33])[C:23]1[CH:24]=[CH:25][CH:26]=[CH:27][CH:28]=1

Participants

5

Reactant 3

HCID 1049PyridineHCID 67749Trifluoromethanesulfonic anhydrideHCID 11190476Methyl 2,3,4-tri-O-benzyl-alpha-D-glucopyranoside

Product 1

HCID 11072048HCID 11072048, compound

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent2×

Conditions

Temperature
-10 °C

Procedure

To a solution of dry pyridine (0.46 ml) in methylene chloride (17.5 ml) cooled to -15° C. was added trifluoromethanesulfonic anhydride (0.87 ml). The mixture was stirred during 15 min at -10° C. then methyl 2,3,4-tri-O-benzyl-α-D-glucopyranoside (1.2 g, 2.58 mmol) in methylene chloride (5 ml) was added (P. Kovac, V. Sklenar and C. Glaudemans, Carbohydr. Res., 175, 201 (1988)). The mixture was stirred during 1.5 h at -10° C. The reaction mixture was washed with water. The organic layer was dried over sodium sulfate, filtered and concentrated under reduced pressure to afford an oil. Flash chromatography on silica gel and elution with a 7:3 mixture of hexane and ethyl acetate afforded the expected compound methyl 2,3,4-tri-O-benzyl-6-O-trifluoromethylsulfonyl-α-D-glucopyranoside which was crystallized from hexane (1.43 g, 93%); m.p. 44°-45° C.

Workup

  1. stirringThe mixture was stirred during 1.5 h at -10° C
  2. washThe reaction mixture was washed with water
  3. dry with materialThe organic layer was dried over sodium sulfate
  4. filtrationfiltered
  5. concentrationconcentrated under reduced pressure
  6. customto afford an oil
  7. washFlash chromatography on silica gel and elution
  8. additionwith a 7:3 mixture of hexane and ethyl acetate

Sources & evidence

ORD record
ord-6c1fc1d17131416fb6ead591e6b20be3
Source dataset
uspto-grants-1996_04
Patent number
US05504078

Reaction notes

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