Cesium carbonate → HCID 178431684, Verbindung

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

To a solution of [(S)-3-(tert-butyldimethylsilanyloxy)-1-(2-fluorophenyl)propyl]-{6,6-dimethyl-4,4-dioxo-5-[4-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)phenyl]-5,6-dihydro-4H-4lambda*6*-[1,4,3]oxathiazin-2-yl}amine (300 mg), trifluoromethanesulfonic acid 1-tert-butyl-1,2,3,6-tetrahydropyridin-4-yl ester (208 mg) and cesium carbonate (519 mg) in 3:1 dioxane/water (4 ml) were added Pd(dba)2 (31 mg) and CTC-Q-Phos (75 mg), and the mixture was stirred at 62° C. for 40 min. After dilution with ethyl acetate, the mixture was washed with water, dried using a kieselguhr cartridge and concentrated. This was followed by purification by column chromatography (ethyl acetate/heptane). This gave the product (207 mg) with a molecular weight of 658.0 g/mol (C35H52FN3O4SSi).

Herkunft & Nachweise