Uracil → 1-[2-(2,2-Dimethyl-1,3-dioxan-5-yl)ethyl]uracil

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

To a solution of uracil (88.5 g, 0.79 mol) in dry DMF (250 mL) was added cesium carbonate (171 g, 0.527 mol) at RT and stirred at the same temperature for 30 min. To the above reaction mixture was added a solution of compound 33 (117 g, 0.527 mol) in dry DMF (250 mL) over a period of 30 min and heated at 50° C. for 24 h. The reaction mixture was filtered, filtrate concentrated under vacuum and crude purified by column chromatography over silica gel (3% methanol in chloroform) to give the title compound (60 g, 45%). TLC: Chloroform/Methanol, 4:1, Rf=0.3

Herkunft & Nachweise