Hydrochloric Acid → HCID 178525564, Verbindung

Temperatur

40 °C

To a round 25 ml bottomed flask containing trans-methyl [4-(2,4-dihydroxyphenyl)cyclohexyl]acetate (60 mg, 0.23 mmol) and water (4 ml) was added sodium hydroxide (32 mg, 0.78 mmol) and the solution heated to 40° C. for 1 hr. The solution was poured into a separating funnel containing ethyl acetate (15 ml) and water (10 ml). To the aqueous layer was then added aqueous hydrochloric acid (10 ml, 1.0M) and ethyl acetate (20 ml). The layers were separated and the aqueous layer extracted with ethyl acetate (3×10 ml). The combined organic extracts were washed with brine (15 ml), dried over magnesium sulfate, filtered and concentrated in vacuo affording the title compound (34 mg, 60%) as a solid. m/z (ES+) 251 (M+H+); δH(CD3OD) 1.20 (2H, m), 1.48 (2H, m), 1.89 (4H, m), 2.25 (2H, d), 2.81 (1H, m), 6.27 (2H, m), 6.91 (1H, m).

1. additionThe solution was poured into a separating funnel
2. customThe layers were separated
3. extractionthe aqueous layer extracted with ethyl acetate (3×10 ml)
4. washThe combined organic extracts were washed with brine (15 ml)
5. dry with materialdried over magnesium sulfate
6. filtrationfiltered
7. concentrationconcentrated in vacuo

ORD-Eintrag

ord-c1d86bdf408f4ea78d2d07869fa327b9

Quelldatensatz

uspto-grants-2005_08

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US06933319B2