Carbon Dioxide → HCID 67170675, compound

HRID 1918372Notes

Reaction equation

Br[C:2]1[CH:3]=[C:4]([Si:13]([CH2:18][CH3:19])([CH2:16][CH3:17])[CH2:14][CH3:15])[C:5]2[O:9][C:8]([F:11])([F:10])[O:7][C:6]=2[CH:12]=1.[C:20](=[O:22])=[O:21].[NH4+].[Cl-]>C(OCC)C>[F:10][C:8]1([F:11])[O:9][C:5]2[C:4]([Si:13]([CH2:18][CH3:19])([CH2:16][CH3:17])[CH2:14][CH3:15])=[CH:3][C:2]([C:20]([OH:22])=[O:21])=[CH:12][C:6]=2[O:7]1

Participants

Conditions

Temperature: 35 °C

Procedure

200 ml of anhydrous diethyl ether were poured to 1.9 g of Mg turnings and 2.0 g of (6-bromo-2,2-difluoro-benzo[1,3]dioxol-4-yl)-triethyl-silane (Eur. J. Org. Chem. 2004, 1, 64) added. The mixture was then stirred at 35° C. for 30 minutes. Then, the heating was shut down and 23.4 g of (6-bromo-2,2-difluoro-benzo[1,3]dioxol-4-yl)-triethyl-silane was added dropwise to the stirred mixture at a rate that ensured gentle boiling. Stirring was continued at 35° C. for 2 h. Then, the mixture was intensly stirred at room temperature under an excess of anhydrous CO2 for 2 h. The reaction mixture was then poured into 300 ml of a saturated aqueous NH4Cl-solution, acidified to pH=3 using aqueous HClI-solution and the organic layer separated. The aqueous layer was then extracted using 200 ml of diethyl ether. The combined organic layer was dried using MgSO4 and evaporated to yield 22.0 g of the title compound that was used without further purification.

Workup

additionadded
stirringStirring
waitwas continued at 35° C. for 2 h
customthe organic layer separated
extractionThe aqueous layer was then extracted
customThe combined organic layer was dried
customevaporated

Sources & evidence

ORD record: ord-63644e5cb3f248c5be912441b31d905b
Source dataset: uspto-grants-2013_12
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08618304B2

Reaction notes

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