Methyl anisate → 4-Methoxy-3-(2-methyl-benzoyl)-benzoic acid methyl ester

HRID 2094730Notes

Reaction equation

[CH3:1][O:2][C:3](=[O:12])[C:4]1[CH:9]=[CH:8][C:7]([O:10][CH3:11])=[CH:6][CH:5]=1.[CH3:13][C:14]1[CH:22]=[CH:21][CH:20]=[CH:19][C:15]=1[C:16](Cl)=[O:17].[Sn](Cl)(Cl)(Cl)Cl>ClC1C=CC=CC=1>[CH3:1][O:2][C:3](=[O:12])[C:4]1[CH:9]=[CH:8][C:7]([O:10][CH3:11])=[C:6]([C:16](=[O:17])[C:15]2[CH:19]=[CH:20][CH:21]=[CH:22][C:14]=2[CH3:13])[CH:5]=1

Participants

Conditions

Temperature: 140 °C

Procedure

4-Methoxybenzoic acid methyl ester (5.00 g, 30.1 mmol) and 2-methylbenzoyl chloride (4.88 g, 31.6 mmol) were dissolved in chlorobenzene (10 ml), tin(IV) chloride (9.41 g, 36.1 mmol) was added cautiously, and the mixture was heated to 140° C. for 3 h. The addition of the acid chloride and tin tetrachloride was repeated twice, and the mixture subsequently heated to 140° C. for 3 h each time. The mixture was poured onto 300 ml of ice/water and extracted with DCM. The combined extracts were dried over magnesium sulfate, filtered and evaporated to dryness. The residue was purified by silica gel chromatography (HEP/EA gradient) and subsequently by RP HPLC (water/ACN gradient) to yield 200 mg of the title compound.

Workup

temperaturethe mixture subsequently heated to 140° C. for 3 h each time
extractionextracted with DCM
dry with materialThe combined extracts were dried over magnesium sulfate
filtrationfiltered
customevaporated to dryness
customThe residue was purified by silica gel chromatography (HEP/EA gradient) and subsequently by RP HPLC (water/ACN gradient)

Sources & evidence

ORD record: ord-6c61bfd23e7a490cbe2bd237df8ccc38
Source dataset: uspto-grants-2013_05
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08445530B2

Reaction notes

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