Morpholine → 4-(6-chloro-4-methyl-1-trityl-1H-pyrazolo[4,3-c]pyridin-3-yl)morpholine

Participants

Reaction Conditions

Reaction Steps

6-Chloro-3-iodo-4-methyl-1-trityl-1H-pyrazolo[4,3-c]pyridine (Intermediate 1C; 2 g, 3.73 mmol), morpholine (0.488 mL, 5.60 mmol), sodium tert-butoxide (0.538 g, 5.60 mmol), and chloro(2-dicyclohexylphosphino-2′,6′-di-i-propoxy-1,1′-biphenyl)[2-(2-aminoethylphenyl)]palladium(II), methyl-t-butylether adduct (0.152 g, 0.187 mmol) was dissolved in dioxane (10 mL) and degassed under argon for five minutes. The reaction mixture was heated to 60° C. for 30 min under microwave irradation. The reaction mixture was diluted with ethyl acetate and washed with saturated ammonium chloride and brine. The organic layer was dried over sodium sulfate, filtered, and concentrated in vacuo while loading onto silica gel. Purification by flash chromatography (5-30% EtOAc/Hexanes) gave 4-(6-chloro-4-methyl-1-trityl-1H-pyrazolo[4,3-c]pyridin-3-yl)morpholine. MS ESI calc'd. For C30H28ClN4O [M+H]+ 495. found 495.

Provenance & Evidence