Potassium Carbonate → HCID 46232618, compound

HRID 83108

Reaction equation

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

Participants

Conditions

Temperature: 57.5 °C

Procedure

1,3-dihydroxy-12H-benzo[b]xanthen-12-one (0.05 g, 0.18 mmol) synthesized in Step 1 of Example 18, K2CO3 (0.07 g, 0.54 mmol), and anhydrous acetone (18 mL) were charged to a dry round-bottom flask. Under stirring, epithiochlorohydrin (0.07 g, 0.72 mmol) dissolved in anhydrous acetone (2 mL) was added thereto. The reaction liquid was stirred with reflux at a temperature of 55 to 60° C. under a nitrogen atmosphere (overnight). Solid of the reaction mixture was filtered and removed, and the filtrate was concentrated under reduced pressure. The resulting residue was separated and purified by silica gel column chromatography (developing solvent: ethyl acetate:n-hexane=1:3 (v/v)) to give the title compound (13.1 mg, 20.8%) as a yellow solid.

Workup

additionwas added
customThe reaction liquid
stirringwas stirred
filtrationSolid of the reaction mixture was filtered
customremoved
concentrationthe filtrate was concentrated under reduced pressure
customThe resulting residue was separated
custompurified by silica gel column chromatography (developing solvent: ethyl acetate:n-hexane=1:3 (v/v))

Sources & evidence

ORD record: ord-847200c51ac644d7879d0a32c9faa962
Source dataset: uspto-grants-2014_09
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08846749B2

Linked notes

Loading…