反应详情

温度

90 °C

5-(6-chloro-4-(isopropylamino)pyridin-3-yl)-1,3,4-oxadiazol-2(3H)-one (49) (1.2 g, 4 mmol) and 3-((tert-butyldimethylsilyl)oxy)propan-1-amine (48) (7 mmol, 1.5 equiv.) were dissolved in ethanol (5 mL). Refluxed the reaction mixture at 90° C., overnight. The reaction mass was concentrated under reduced pressure to remove excess of solvent. The crude material obtained was taken to next step as such, without purification. LC/MS: Acquity BEH C18 2.1×50 mm, 1.8 micron; Solvent A=0.1% TFA in water; Solvent B=0.1% TFA in ACN; gradient 0-100% B over 2 min; retention time: 1.02 min; LCMS (ES-API), m/z 444.9 (M+H).

1. customovernight
2. concentrationThe reaction mass was concentrated under reduced pressure
3. customto remove excess of solvent