Potassium Carbonate → Methyl 7-(3,4-diethoxybenzyloxy)-1,1-dioxo-2,3-dihydro-1-benzothiepine-4-carboxylate

HRID 1169505

Reaktionsgleichung

[OH:1][C:2]1[CH:3]=[CH:4][C:5]2[S:11](=[O:13])(=[O:12])[CH2:10][CH2:9][C:8]([C:14]([O:16][CH3:17])=[O:15])=[CH:7][C:6]=2[CH:18]=1.[CH2:19]([O:21][C:22]1[CH:23]=[C:24]([CH:27]=[CH:28][C:29]=1[O:30][CH2:31][CH3:32])[CH2:25]Cl)[CH3:20].C(=O)([O-])[O-].[K+].[K+]>CN(C=O)C.C(OCC)(=O)C>[CH2:19]([O:21][C:22]1[CH:23]=[C:24]([CH:27]=[CH:28][C:29]=1[O:30][CH2:31][CH3:32])[CH2:25][O:1][C:2]1[CH:3]=[CH:4][C:5]2[S:11](=[O:13])(=[O:12])[CH2:10][CH2:9][C:8]([C:14]([O:16][CH3:17])=[O:15])=[CH:7][C:6]=2[CH:18]=1)[CH3:20]

Komponenten

Reaktionsbedingungen

Temperatur: 70 °C

Versuchsvorschrift

Methyl 7-hydroxy-1,1-dioxo-2,3-dihydro-1-benzothiepine-4-carboxylate (403 mg), 3,4-diethoxybenzyl chloride (802 mg) and potassium carbonate (311 mg) were suspended in DMF (15 ml), and the resulting suspension was stirred at 70° C. for 3 hours. The reaction mixture was diluted with ethyl acetate and was washed respectively with water and an aqueous saturated solution of sodium chloride, and the organic layer was dried with anhydrous magnesium sulfate. After evaporation under reduced pressure to remove the solvent, the residue was purified by silica gel column chromatography (hexane:ethyl acetate=3:1) to obtain methyl 7-(3,4-diethoxybenzyloxy)-1,1-dioxo-2,3-dihydro-1-benzothiepine-4-carboxylate (818 mg) as a yellow amorphous substance.

Aufarbeitung

washwas washed respectively with water
dry with materialan aqueous saturated solution of sodium chloride, and the organic layer was dried with anhydrous magnesium sulfate
customAfter evaporation under reduced pressure
customto remove the solvent
customthe residue was purified by silica gel column chromatography (hexane:ethyl acetate=3:1)

Quellen und Nachweise

ORD-Eintrag: ord-36548bc50756420998b84ecbb5f0bcd3
Quelldatensatz: uspto-grants-2003_09
DOI: 10.6084/m9.figshare.5104873.v1
Patentnummer: US06627651B1

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