反应详情

温度

80 °C

A mixture of methyl (1aRS,7bSR)-5-(2-{[((R)-1-ethylpyrrolidine-3-ylcarbonyl)amino]methyl}-4-fluoro-benzenesulfonylamino)-1,1a,2,7b-tetrahydrocyclopropa[c]chromene-4-carboxylate (Intermediate 195, 0.215 g) and lithium hydroxide monohydrate (0.170 g) was suspended in dioxane (5 mL) and water (5 mL) and the mixture was stirred and heated at 80° C. for 21 hours. The temperature was raised to 100° C. and the mixture was stirred and heated at that temperature for 2.5 hours. Further lithium hydroxide monohydrate (0.05 g) was added and the mixture was stirred and heated at 100° C. for 2 hours. After cooling, the volatiles were removed in vacuo and the residue was acidified by addition of aqueous citric acid solution (10%) and extracted with DCM. The organic layer was dried (Na2SO4) and filtered. The filtrate was evaporated to dryness and the residue was purified by preparative HPLC (C18) eluting with a mixture of acetonitrile and water, containing 0.1% formic acid, with a gradient of 25-60% to give (1aRS,7bSR)-5-(2-{[((R)-1-ethylpyrrolidine-3-ylcarbonyl)-amino]methyl}-4-fluorobenzenesulfonylamino)-1,1a,2,7b-tetrahydrocyclopropa[c]chromene-4-carboxylic acid (0.103 g) as a white solid.

1. temperatureThe temperature was raised to 100° C.
2. temperatureheated at that temperature for 2.5 hours
3. stirringthe mixture was stirred
4. temperatureheated at 100° C. for 2 hours
5. temperatureAfter cooling
6. customthe volatiles were removed in vacuo
7. additionthe residue was acidified by addition of aqueous citric acid solution (10%)
8. extractionextracted with DCM
9. dry with materialThe organic layer was dried (Na2SO4)
10. filtrationfiltered
11. customThe filtrate was evaporated to dryness
12. customthe residue was purified by preparative HPLC (C18)
13. washeluting with a mixture of acetonitrile and water
14. additioncontaining 0.1% formic acid