Boron trifluoride → HCID 67115776, compound

HRID 1258852Notes

Reaction equation

[Br:1][C:2]1[CH:7]=[CH:6][C:5]([C:8]2(OC)[C@H:13]([OH:14])[C@@H:12]([OH:15])[C@H:11]([OH:16])[C@@H:10]([CH2:17][OH:18])[O:9]2)=[CH:4][C:3]=1[CH2:21][C:22]1[CH:31]=[CH:30][C:25]2[O:26][CH2:27][CH2:28][O:29][C:24]=2[CH:23]=1.C([SiH](CC)CC)C.B(F)(F)F>C(#N)C.ClCCl>[Br:1][C:2]1[CH:7]=[CH:6][C:5]([CH:8]2[C@H:13]([OH:14])[C@@H:12]([OH:15])[C@H:11]([OH:16])[C@@H:10]([CH2:17][OH:18])[O:9]2)=[CH:4][C:3]=1[CH2:21][C:22]1[CH:31]=[CH:30][C:25]2[O:26][CH2:27][CH2:28][O:29][C:24]=2[CH:23]=1

Participants

Conditions

Temperature: 10 °C

Procedure

To a stirred solution of (3R,4S,5S,6R)-2-[4-bromo-3-(2,3-dihydro-benzo[1,4]dioxin-6-ylmethyl)-phenyl]-6-hydroxymethyl-2-methoxy-tetrahydro-pyran-3,4,5-triol (28.4 g, 57.1 mmol) in acetonitrile-dichloromethane 1:1 (250 mL) was added triethylsilane (36.5 mL, 228.4 mmol) and boron trifluoride diethyletharate complex (14.1 mL, 114.2 mmol) at 10° C. After stirring for 4 h at 10° C., the reaction was quenched with saturated aqueous sodium bicarbonate (˜100 mL). The organic layer was separated, and the aqueous layer was extracted with ethyl acetate (3×150 mL). The organic layers were combined and dried over sodium sulfate, concentrated to furnish (3R,4R,5S,6R)-2-[4-bromo-3-(2,3-dihydro-benzo[1,4]dioxin-6-ylmethyl)-phenyl]-6-hydroxymethyl-tetrahydro-pyran-3,4,5-triol (28.4 g). Crude product was used for next reaction without purification.

Workup

customthe reaction was quenched with saturated aqueous sodium bicarbonate (˜100 mL)
customThe organic layer was separated
extractionthe aqueous layer was extracted with ethyl acetate (3×150 mL)
dry with materialdried over sodium sulfate
concentrationconcentrated

Sources & evidence

ORD record: ord-e038747f62824e0c82631b1352d4f09e
Source dataset: uspto-grants-2013_06
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08466114B2

Reaction notes

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