Formic Acid → (1aRS,7bSR)-5-[2-((Z)-3-diethylaminoprop-1-enyl)-4-fluorobenzenesulfonylamino]-1,1a,2,7b-tetrahydrocyclopropa[c]chromene-4-carboxylic acid

Methyl (1aRS,7bSR)-5-[2-((Z)-3-diethylaminoprop-1-enyl)-4-fluorobenzenesulfonylamino]-1,1a,2,7b-tetrahydrocyclopropa[c]chromene-4-carboxylate (Intermediate 40, 0.185 g) and lithium hydroxide monohydrate (0.159 g) were suspended in dioxane (4 mL) and water (1 mL). The reaction mixture was irradiated in the microwave at 135° C. for 30 minutes. After cooling, the mixture was acidified to pH4 with formic acid, then ethanol and toluene were added and the mixture concentrated in vacuo. The residue was triturated with a mixture of methanol and DCM (10%) and the solid was filtered off and washed with a mixture of methanol and DCM. The filtrate was concentrated in vacuo and the residue was purified by chromatography on silica, eluting with a mixture of methanol and DCM with a gradient of 0-8%. The resultant product was triturated with ethyl acetate and dried in vacuo at 50° C. to give (1aRS,7bSR)-5-[2-((Z)-3-diethylaminoprop-1-enyl)-4-fluorobenzenesulfonylamino]-1,1a,2,7b-tetrahydrocyclopropa[c]chromene-4-carboxylic acid (0.066 g) as a white solid.

1. customThe reaction mixture was irradiated in the microwave at 135° C. for 30 minutes
2. temperatureAfter cooling
3. concentrationthe mixture concentrated in vacuo
4. customThe residue was triturated with a mixture of methanol and DCM (10%)
5. filtrationthe solid was filtered off
6. washwashed with a mixture of methanol and DCM
7. concentrationThe filtrate was concentrated in vacuo
8. customthe residue was purified by chromatography on silica
9. washeluting with a mixture of methanol and DCM with a gradient of 0-8%
10. customThe resultant product was triturated with ethyl acetate
11. customdried in vacuo at 50° C.

ORD 기록

ord-42f9052d878a45f5a5a97d49ce9e64c0

출처 데이터셋

uspto-grants-2016_03

DOI

10.6084/m9.figshare.5104873.v1

특허 번호

US09290472B2