Vinyl Acetate → (R)-2-(1-Acetoxy-ethyl)-3H-pyrimidin-4-one

Temperatur

50 °C

To a solution of vinyl acetate (4.3 g, 50 mmol) in dioxane (63 mL) was added 2-(1-hydroxy-ethyl)-3H-pyrimidin-4-one (prepared according to the method of Preparation Twelve, 2.1 g, 15.1 mmol), and the mixture was heated to 50° C. To the resulting solution was added lipase P30 (0.21 g, 10 wt %) and the heating was continued for 24 h. The reaction mixture was filtered and the filtrate was evaporated to obtain a thick syrupy liquid residue. The residue was purified by flash column chromatography (95:5 dichloromethane:methanol) to give the title compound as a colorless liquid, 0.97 g (92% of theory). 1H NMR (CDCl3, 300 MHz) δ 1.61 (d, 3H), 2.20 (s, 3H), 5.65 (q, 1H), 6.35 (d, 1H), 7.97 (d, 1H), 11.94 (s, 1H); [α]D+39.9 (c 1.0, MeOH).

1. customprepared
2. customaccording to the method of Preparation Twelve, 2.1 g, 15.1 mmol), and the mixture
3. additionTo the resulting solution was added lipase
4. filtrationThe reaction mixture was filtered
5. customthe filtrate was evaporated
6. customto obtain a thick syrupy liquid residue
7. customThe residue was purified by flash column chromatography (95:5 dichloromethane:methanol)

ORD-Eintrag

ord-add46565306744589ce91689c71c4519

Quelldatensatz

uspto-grants-2005_03

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US06869943B2