HuagongsheHuagongshe Chemistry Print Report · For research reference only
Dichloromethane → ethyl 8-methyl-6-(trifluoromethoxy)-2-(trifluoromethyl)-2H-chromene-3-carboxylate
Participants
| Role | Name | HCID | Charge |
|---|---|---|---|
| Reactant | Dichloromethane | HCID 6344 | — |
| Reactant | Ethyl Acetate | HCID 8857 | — |
| Reactant | Cesium carbonate | HCID 10796 | — |
| Reactant | Trimethylboroxine | HCID 574072 | — |
| Reactant | ethyl 8-iodo-6-(trifluoromethoxy)-2-(trifluoromethyl)-2H-chromene-3-carboxylate | HCID 86599457 | — |
| Catalyst | Bis(cyclopenta-1,4-dien-1-yl(diphenyl)phosphane);dichloropalladium;iron(2+) | HCID 178418228 | — |
| Solvent | 1,4-Dioxane | HCID 31275 | — |
| Product | ethyl 8-methyl-6-(trifluoromethoxy)-2-(trifluoromethyl)-2H-chromene-3-carboxylate | HCID 86599456 | 83% |
Reaction Steps
A mixture of ethyl 8-iodo-6-(trifluoromethoxy)-2-(trifluoromethyl)-2H-chromene-3-carboxylate prepared as in Example 21a, Step 2 (0.500 g, 1.04 mmole), trimethylboroxine (145 uL, 1.04 mmole), PdCl2(dppf)2.CH2Cl2 (0.084 mg, 0.104 mmole) and Cs2CO3 (1.01 g, 3.11 mmole) in 10% aqueous dioxane (2.5 mL) was heated to 110° C. under a dry N2 atmosphere for 6 h. The mixture was poured into EtOAc (100 mL), washed with brine (2×50 mL), dried over MgSO4, filtered and concentrated in vacuo to give an oily yellow solid. Purification by silica chromatography (9:1 hexanes:EtOAc) gave 0.320 g (83% yield) of the product as a yellow crystalline solid: EIHRMS m/z 370.0650 (M+, C15H2F6O4, 370.0640).
Provenance & Evidence
| DOI | 10.6084/m9.figshare.5104873.v1 |
|---|---|
| Patent number | US07259266B2 |
| Source dataset | uspto-grants-2007_08 |
| ORD ID | ord-d274f5e0145c477c8344b93462f72bf7 |
| Source note | uspto-grants-2007_08 |