Propyl mercaptan → 1,3-Dimethyl-2,4-dioxo-6-(propylthio)-1,2,3,4-tetrahydropyrimidine-5-carbaldehyde

To a stirred solution of propane-1-thiol (2.30 mmol) in dry 1,4-dioxane (4 ml), NaH (2.30 mmol) was added under argon. To the mixture, a solution of 6-chloro-1,3-dimethyl-2,4-dioxo-1,2,3,4-tetrahydropyrimidine-5-carbaldehyde (2 mmol) in dry 1,4-dioxane (8 ml) was added at 5-8° C. in one portion. The mixture was stirred at room temperature until the starting material was consumed (monitored by TLC). Then the mixture was poured onto ice water (50 ml) and the aqueous phase was extracted with ethyl acetate (3×30 ml). The combined organic phases were washed with water and dried over anhydrous MgSO4. The solvent was evaporated in vacuo and the crude product was purified by column chromatography with a mixture of n-hexane:ethyl acetate (1:1) as the eluent.

1. customwas consumed (monitored by TLC)
2. additionThen the mixture was poured onto ice water (50 ml)
3. extractionthe aqueous phase was extracted with ethyl acetate (3×30 ml)
4. washThe combined organic phases were washed with water
5. dry with materialdried over anhydrous MgSO4
6. customThe solvent was evaporated in vacuo
7. customthe crude product was purified by column chromatography with a mixture of n-hexane:ethyl acetate (1:1) as the eluent

ORD-Eintrag

ord-36c7cc926e514e7ea932e77118df6091

Quelldatensatz

uspto-grants-2013_09

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US08536210B2