Carbon Dioxide → HCID 13633558, compound

HRID 1651323Notes

Reaction equation

Br[C:2]1[CH:7]=[CH:6][C:5]([O:8][CH3:9])=[C:4]([C:10]([CH3:21])([CH3:20])[CH2:11][CH2:12][CH2:13][CH2:14][CH2:15][CH2:16][CH2:17][CH2:18][CH3:19])[CH:3]=1.[Mg].II.[C:25](=[O:27])=[O:26].Cl>C1COCC1>[CH3:20][C:10]([C:4]1[CH:3]=[C:2]([CH:7]=[CH:6][C:5]=1[O:8][CH3:9])[C:25]([OH:27])=[O:26])([CH3:21])[CH2:11][CH2:12][CH2:13][CH2:14][CH2:15][CH2:16][CH2:17][CH2:18][CH3:19]

Participants

Conditions

Temperature: -40 °C

Procedure

The 4-bromo-2-(1,1-dimethyldecyl) anisole (15.72 g, 44.2 mmoles) obtained in Example 11(a), above, is dissolved in THF (50 ml). This solution is slowly added to magnesium (1.18 g, 48.7 mmoles) and an iodine crystal, while being maintained at reflux by heating. Once the addition is complete, the reaction mixture is maintained at reflux for 30 minutes and then cooled to -40° C. 300 ml of THF are added and a stream of CO2 is passed therethrough for 2 hours. The reaction mixture is then poured into a solution of HCl (4N, 300 ml) and the product is extracted with ether (3×300 ml). The organic phase is washed with water until neutral, dried on MgSO4, and the solvents are evaporated. The residue is pulverized in isooctane to produce 7.25 g (51%. yield) of 3-(1,1-dimethyldecyl)-4-methoxy benzoic acid which melts at 112° C.

Workup

temperatureat reflux
temperatureby heating
additionOnce the addition
temperaturethe reaction mixture is maintained
temperatureat reflux for 30 minutes
extractionthe product is extracted with ether (3×300 ml)
washThe organic phase is washed with water until neutral,
customdried on MgSO4
customthe solvents are evaporated

Sources & evidence

ORD record: ord-337ce6b86b3d4fd49772f8f32bd98303
Source dataset: uspto-grants-1990_05
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US04927928

Reaction notes

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