Cesium carbonate → HCID 67207470, Verbindung

Temperatur

85 °C

A solution of potassium vinyltrifluoroborate (2.00 mmol), PdCl2 (0.04 mmol), PPh3 (0.12 mmol), Cs2CO3 (6.00 mmol), and N-(4-bromo-3-chlorophenyl)acetamide (2.00 mmol) in THF/H2O (9:1) (4 mL) was heated at 85° C. under an N2 atmosphere in a sealed tube. The reaction mixture was stirred at 85° C. for 22 h, then cooled to room temperature and diluted with H2O (3 mL) followed by extraction with CH2Cl2 (10 mL*3). The solvent was removed in vacuo, and the crude product was purified by silica gel chromatography (eluting with mixture of Hexanes and Ethyl acetate) to yield the vinylic arene. A solution of vinyl arene (2 mmol) in dry THF (10 mL) was treated with BH3-Me2S (1.6 mmol, 0.8 equiv) at 0° C. and the reaction mixture was warmed at room temperature and stirred for overnight, after which time 10 mL water was added to dilute the solution. Then 3M NaOH solution (0.93 mL) and 30% (w/w) hydrogen peroxide solution (1.54 mL) was added sequentially to the reaction at 0° C. The mixture was allowed to stir overnight at room temperature and was extracted with CH2Cl2 (20×3 mL). The organic layer was dried with MgSO4 and concentrated in vacuum. Column chromatography was run using mixture of hexanes and ethyl acetate to afford corresponding alcohols.

1. temperaturecooled to room temperature
2. extractionfollowed by extraction with CH2Cl2 (10 mL*3)
3. customThe solvent was removed in vacuo
4. customthe crude product was purified by silica gel chromatography (eluting with mixture of Hexanes and Ethyl acetate)

ORD-Eintrag

ord-5ff9fe31304a4c63aae8aa1be911a9c4

Quelldatensatz

uspto-grants-2014_05

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US08722720B2