HuagongsheHuagongshe Chemistry Print Report · For research reference only
Cesium carbonate → 4-(4-Methanesulfonyl-phenoxy)-benzofuran-6-carboxylic acid ethyl ester
Participants
| Role | Name | HCID | Charge |
|---|---|---|---|
| Reactant | Cesium carbonate | HCID 10796 | — |
| Reactant | 1-Fluoro-4-(methylsulphonyl)benzene | HCID 67994 | — |
| Reactant | Ethyl 4-hydroxybenzofuran-6-carboxylate | HCID 11344757 | — |
| Reactant | 6-(4-Methanesulfonyl-phenoxy)-2-methyl-2,3-dihydro-benzofuran-4-carboxylic acid methyl ester | HCID 59560437 | — |
| Product | 4-(4-Methanesulfonyl-phenoxy)-benzofuran-6-carboxylic acid ethyl ester | HCID 59560174 | — |
Reaction Steps
The title compound was prepared in a similar manner as described for Intermediate 1f, from 4-fluorophenyl methyl sulfone (180 mg, 1.03 mmol), Cs2CO3 (630 mg, 1.93 mmol), and 4-hydroxy-benzofuran-6-carboxylic acid ethyl ester (8a) (199 mg, 0.97 mmol). Purification by flash column chromatography eluting with 15% EtOAc in hexanes gave a pale yellow oil (261 mg, 75% yield). 1H NMR (400 MHz, CDCl3) δ 8.13 (s, 1 H) 7.91 (s, 2 H) 7.74 (s, 1 H) 7.65 (s, 1 H) 7.13 (s, 2 H) 6.66 (s, 1 H) 4.41 (s, 2 H) 3.08 (s, 3 H) 1.42 (s, 3 H); LCMS for C18H1606S m/z 383.00 (M+Na)+.
Provenance & Evidence
| DOI | 10.6084/m9.figshare.5104873.v1 |
|---|---|
| Patent number | US08119624B2 |
| Source dataset | uspto-grants-2012_02 |
| ORD ID | ord-442bfa199937494d8ffed3487bead1d9 |
| Source note | uspto-grants-2012_02 |