反应详情

温度

80 °C

A mixture of methyl cis-(1aRS,7bSR)-5-[2-((Z)-3-diethylaminoprop-1-enyl)-4-fluoro-benzenesulfonylmethyl]-1,1a,2,7b-tetrahydrocyclopropa[c]chromene-4-carboxylate (Intermediate 1, 0.72 g) and lithium hydroxide (0.622 g) in dioxane (20 mL) and water (5 mL) was stirred and heated at 80° C. for 5 hours. After cooling, the mixture was filtered and the filtrate was concentrated to low volume under vacuum. The aqueous residue was acidified with formic acid to pH 5 and extracted with DCM. The organic layer was dried (MgSO4) and filtered. The filtrate was evaporated to dryness and the residue was purified by reverse phase chromatography using a C-18 5 micron cartridge and eluting with a mixture of methanol and water, with a gradient of 10-98%. The product was repurified by HPLC(C18) eluting with a mixture of acetonitrile and water (containing 0.1% formic acid) to give cis-(1aRS,7bSR)-5-[2-((Z)-3-diethylaminoprop-1-enyl)-4-fluorobenzenesulfonylmethyl]-1,1a,2,7b-tetrahydrocyclopropa[c]chromene-4-carboxylic acid (0.125 g) as a white solid.

1. temperatureAfter cooling
2. filtrationthe mixture was filtered
3. concentrationthe filtrate was concentrated to low volume under vacuum
4. extractionextracted with DCM
5. dry with materialThe organic layer was dried (MgSO4)
6. filtrationfiltered
7. customThe filtrate was evaporated to dryness
8. customthe residue was purified by reverse phase chromatography
9. washeluting with a mixture of methanol and water, with a gradient of 10-98%
10. customThe product was repurified by HPLC(C18)
11. washeluting with a mixture of acetonitrile and water (containing 0.1% formic acid)