反应详情

To a to ethanol (2.0 mL) solution of (E)-6-(3-fluorobenzylamino)-2-(3-methoxy-4-(4-methyl-1H-imidazol-1-yl)benzylidene)hexanoic acid ethyl ester (173 mg), 2N sodium hydroxide solution (2.0 mL) was added. After refluxing the reaction solution for 1 hour and confirming disappearance of the starting materials, 2N hydrochloric acid and ethyl acetate were added to the reaction solution, and the organic layer was partitioned. After the obtained organic layer was washed with a saturated saline solution, it was dried over anhydrous magnesium sulfate and concentrated under reduced pressure. IPEA (134 μL), EDC (98.2 mg), and HOBT (69.2 mg) were added to a DMF (5.0 mL) solution of the obtained carboxylic acid compound (112 mg) one by one, and the reaction solution was agitated at room temperature overnight. After confirming disappearance of the starting materials, water and ethyl acetate were added to the reaction solution, and the organic layer was partitioned. After the obtained organic layer was washed with a saturated saline solution, it was dried over anhydrous magnesium sulfate and concentrated under reduced pressure. The residue was purified by silica gel chromatography (elution solvent: ethyl acetate), and 70.3 mg of the title compound was obtained. The physical properties of the compound are as follows.

1. temperatureAfter refluxing the reaction solution for 1 hour
2. additionwere added to the reaction solution
3. customthe organic layer was partitioned
4. washAfter the obtained organic layer was washed with a saturated saline solution, it
5. dry with materialwas dried over anhydrous magnesium sulfate
6. concentrationconcentrated under reduced pressure
7. additionIPEA (134 μL), EDC (98.2 mg), and HOBT (69.2 mg) were added to a DMF (5.0 mL) solution of the obtained carboxylic acid compound (112 mg) one by one
8. additionwere added to the reaction solution
9. customthe organic layer was partitioned
10. washAfter the obtained organic layer was washed with a saturated saline solution, it
11. dry with materialwas dried over anhydrous magnesium sulfate
12. concentrationconcentrated under reduced pressure
13. customThe residue was purified by silica gel chromatography (elution solvent: ethyl acetate)