反应详情

温度

120 °C

A mixture of methyl (1aRS,7bSR)-5-[2((Z)-3-ethylaminoprop-1-enyl)-4-fluorobenzenesulfonylamino]-1,1a,2,7b-tetrahydrocyclopropa[c]chromene-4-carboxylate (Intermediate 63, 0.09 g) and lithium hydroxide monohydrate (0.047 g) in a mixture of dioxane (10 mL) and water (5 mL) was stirred and heated at 120° C. for 32 hours. After cooling, the mixture was concentrated under vacuum and the residue was acidified to pH4 with formic acid. The resultant solid was collected by filtration and washed with water to give (1aRS,7bSR)-5-[2((Z)-3-ethylaminoprop-1-enyl)-4-fluorobenzene-sulfonylamino]-1,1a,2,7b-tetrahydrocyclopropa-[c]chromene-4-carboxylic acid (0.029 g) as a grey solid.

1. temperatureAfter cooling
2. concentrationthe mixture was concentrated under vacuum
3. filtrationThe resultant solid was collected by filtration
4. washwashed with water