反应详情

温度

100 °C

To a solution of 2,6-dichloropyrimidine-4-carboxamide (0.385 g, 2.01 mmol) in THF (10 mL) was added (S)-ethyl 2-hydroxypropanoate (0.26 mL, 2.3 mmol). The mixture was cooled on a dry-ice acetone bath and 60% NaH in mineral oil (0.094 g, 2.4 mmol) was added. The reaction was allowed to warm up slowly and after 2 h was quenched with 2 mL 10% citric acid solution. The reaction mixture was partitioned between 50 mL EtOAc and 25 mL brine and the organic fraction dried over MgSO4, filtered and concentrated in vacuo. The residue was dissolved in dioxane (10 mL) and 2-(4-(4-fluorophenoxy)phenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (0.691 g, 2.20 mmol), 2M aqueous Na2CO3 (2.0 mL, 4.0 mmol), and PdCl2(dppf) (0.091 g, 0.11 mmol) were added. The reaction vessel was flushed with argon, sealed, and heated at 100° C. overnight. After cooling, the reaction mixture was evaporated in vacuo and the residue chromatographed over silica gel with 10-50% acetone in hexanes. The product fractions were evaporated in vacuo to give (S)-ethyl 2-((6-carbamoyl-2-(4-(4-fluorophenoxy)phenyl)pyrimidin-4-yl)oxy)propanoate as a pale tan oil (0.762 g, 1.79 mmol, 90% yield). LC/MS: m/z=426.2 [M+H]+.

1. temperatureThe mixture was cooled on a dry-ice acetone bath
2. temperatureto warm up slowly and after 2 h
3. customwas quenched with 2 mL 10% citric acid solution
4. customThe reaction mixture was partitioned between 50 mL EtOAc and 25 mL brine
5. dry with materialthe organic fraction dried over MgSO4
6. filtrationfiltered
7. concentrationconcentrated in vacuo
8. dissolutionThe residue was dissolved in dioxane (10 mL)
9. customThe reaction vessel was flushed with argon
10. customsealed
11. temperatureAfter cooling
12. customthe reaction mixture was evaporated in vacuo
13. customthe residue chromatographed over silica gel with 10-50% acetone in hexanes
14. customThe product fractions were evaporated in vacuo