Water → HCID 86745555, compound

HRID 466898Notes

Reaction equation

[CH2:1]([O:8][C@@H:9]1[C@@H:16]([O:17][CH2:18][C:19]2[CH:24]=[CH:23][CH:22]=[CH:21][CH:20]=2)[C@H:15]([O:25][CH2:26][C:27]2[CH:32]=[CH:31][CH:30]=[CH:29][CH:28]=2)[C@@H:14]([CH2:33][CH2:34]OS(C)(=O)=O)[O:13][CH:10]1[O:11][CH3:12])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[I-:40].[Mg+2].[I-].O>CCOCC>[CH2:1]([O:8][C@@H:9]1[C@@H:16]([O:17][CH2:18][C:19]2[CH:24]=[CH:23][CH:22]=[CH:21][CH:20]=2)[C@H:15]([O:25][CH2:26][C:27]2[CH:32]=[CH:31][CH:30]=[CH:29][CH:28]=2)[C@@H:14]([CH2:33][CH2:34][I:40])[O:13][C@@H:10]1[O:11][CH3:12])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[I-:40]

Participants

Conditions

Temperature: 0 °C

Procedure

To a solution of methyl 2,3,4-tri-O-benzyl-6-deoxy-7-O-methylsulfonyl-D-glucoheptopyranoside (0.38 g, 0.83 mmol) in ether (5 mL) was added at 0° C. a 0.375 M solution of magnesium iodide (6.7 mL). The mixture was stirred 15 min at 0° C. The excess of magnesium iodide was hydrolyzed with water. The reaction mixture was washed with sodium thiosulfate and 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 2:8 mixture of ethyl acetate and hexane afforded the expected iodide methyl 2,3,4-tri-O-benzyl-6,7-dideoxy-7-iodo-α-D-glucoheptopyranoside which was crystallized from hexane (0.368 g, 91%); m.p. 66°-68° C.

Workup

washThe reaction mixture was washed with sodium thiosulfate and water
dry with materialThe organic layer was dried over sodium sulfate
filtrationfiltered
concentrationconcentrated under reduced pressure
customto afford an oil
washFlash chromatography on silica gel and elution
additionwith a 2:8 mixture of ethyl acetate and hexane

Sources & evidence

ORD record: ord-5bc7c1a96940451db134b704f985c3ae
Source dataset: uspto-grants-1992_10
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US05157116

Reaction notes

Loading…