Potassium Carbonate → Methyl 7-[3-(2-propoxyphenyl)propoxy]-1,1-dioxo-2,3-dihydro-1-benzothiepine-4-carboxylate

HRID 1169490Notes

Reaction equation

[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.CS(O[CH2:24][CH2:25][CH2:26][C:27]1[CH:32]=[CH:31][CH:30]=[CH:29][C:28]=1[O:33][CH2:34][CH2:35][CH3:36])(=O)=O.C(=O)([O-])[O-].[K+].[K+]>CN(C=O)C.C(OCC)(=O)C>[CH2:34]([O:33][C:28]1[CH:29]=[CH:30][CH:31]=[CH:32][C:27]=1[CH2:26][CH2:25][CH2:24][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)[CH2:35][CH3:36]

Participants

Conditions

Temperature: 60 °C

Procedure

Methyl 7-hydroxy-1,1-dioxo-2,3-dihydro-1-benzothiepine-4-carboxylate (400 mg), 3-(2-propoxyphenyl)propyl methanesulfonate (1.06 g) and potassium carbonate (309 mg) were suspended in DMF (15 ml), and the resulting suspension was stirred at 60° 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 concentration 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-(2-propoxyphenyl)propoxy]-1,1-dioxo-2,3-dihydro-1-benzothiepine-4-carboxylate (832 mg) as a yellow oil.

Workup

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

Sources & evidence

ORD record: ord-c450892efe9e47be92eec36958a49702
Source dataset: uspto-grants-2003_09
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US06627651B1

Reaction notes

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