反应详情

To a solution of (2-chloro-6-(1-ethoxyvinyl)pyrimidin-4-yl)methyl methanesulfonate (0.5 g, 1.71 mmol) in benzene (8 mL) were added (3,3-difluorocyclobutyl)methanol (0.313 g, 2.56 mmol), sodium hydroxide (aq, 5 M, 0.512 mL, 2.56 mmol) and tetrabutylammonium hydrogen sulfate (0.058 g, 0.17 mmol). The mixture was stirred vigorously at rt for 72 h. The mixture was extracted with diethylether. The organic phase was washed with 50% brine, dried over magnesium sulfate and the solvent was evaporated to give 484 mg crude product. 123 mg material from a different batch synthesized using the same method was added. The residue was purified by column chromatography on silica eluting with a gradient of EtOAc in heptane to give the title compound as a gum (0.110 g, 20%).

1. extractionThe mixture was extracted with diethylether
2. washThe organic phase was washed with 50% brine
3. dry with materialdried over magnesium sulfate
4. customthe solvent was evaporated
5. customto give 484 mg crude product
6. additionwas added
7. customThe residue was purified by column chromatography on silica eluting with a gradient of EtOAc in heptane