Cesium carbonate → HCID 86707274, Verbindung

Temperatur

100 °C

1,4-Dioxane (5 mL) and water (1.2 mL) were added to 4-bromo-2-fluoroaniline (285 mg, 1.50 mmol), trans-3-(cyclopentyl)propenylboronic acid pinacol ester (425 mg, 1.80 mmol), tris(dibenzylidene acetone)dipalladium (137 mg, 0.15 mmol), tri-2-furylphosphine (210 mg, 0.90 mmol) and cesium carbonate (976 mg, 3.00 mmol). The mixture was heated to an external temperature of 100° C. and stirred for 6 hr, under a nitrogen atmosphere. After cooling, the mixture was diluted with ethyl acetate and washed with brine. The organic layer was dried over anhydrous magnesium sulfate and then the desiccant was filtered off, followed by concentration under reduced pressure. The resulting residue was purified by silica gel column chromatography (hexane only→hexane:ethyl acetate=9:1) to afford the title compound as a pale yellow oil (302 mg).

1. temperatureAfter cooling
2. washwashed with brine
3. dry with materialThe organic layer was dried over anhydrous magnesium sulfate
4. filtrationthe desiccant was filtered off
5. concentrationfollowed by concentration under reduced pressure
6. customThe resulting residue was purified by silica gel column chromatography (hexane only→hexane

ORD-Eintrag

ord-97911015bf3c4f2e969f69206e1790ad

Quelldatensatz

uspto-grants-2015_05

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US09035059B2