4-Fluoroaniline → (R)-1-[2-(tert-butyl-dimethyl-silanyloxy)-1-methyl-ethyl]-3-(4-ethyl-phenyl)-7-(4-fluoro-phenylamino)-3,4-dihydro-1H-pyrimido[4,5-d]pyrimidin-2-one

Participants

Reaction Conditions

Reaction Steps

(R)-1-[2-(tert-Butyl-dimethyl-silanyloxy)-1-methyl-ethyl]-7-chloro-3-(4-ethyl-phenyl)-3,4-dihydro-1H-pyrimido[4,5-d]pyrimidin-2-one (100 mg, 0.21 mmol) (from Example 38e supra) was suspended in 2-propanol (2 mL) (Fisher). 4-Fluoroaniline (0.03 mL, 0.32 mmol) (Aldrich) was added and the mixture was heated to 160° C. in a microwave synthesizer (SmithSynthesizer™) for 30 minutes. After cooling to room temperature, the heterogeneous reaction mixture was diluted with dichloromethane. The resulting solution was washed with 1 N aqueous hydrochloric acid. The layers were separated and the organic phase was dried over anhydrous sodium sulfate, filtered and then concentrated under reduce pressure to give (R)-1-[2-(tert-butyl-dimethyl-silanyloxy)-1-methyl-ethyl]-3-(4-ethyl-phenyl)-7-(4-fluoro-phenylamino)-3,4-dihydro-1H-pyrimido[4,5-d]pyrimidin-2-one as a pale yellow solid. (Yield 107 mg, 91%).

Provenance & Evidence