2-Chloro-3,4-dihydro-6-(3,4-dimethoxyphenyl)-3-methyl-4-(2,4,6-trimethylphenylimino)pyrimidine → 3,4-Dihydro-6-(3,4-dimethoxyphenyl)-3-methyl-4-(2,4,6-trimethylphenylimino)pyrimidine

Beteiligte Stoffe

Reaktionsschritte

To a suspension of 2-chloro-3,4-dihydro-6-(3,4-dimethoxyphenyl)-3-methyl-4-(2,4,6-trimethylphenylimino)pyrimidine (1.5 g) in ethanol (20 ml) was added 10%-palladium on carbon (0.8 g). The mixture was stirred under hydrogen (1 atm) for 40 minutes. After removal of the catalist by filtration, the filtrate was evaporated in vacuo. The residue was neutralized with aqueous sodium bicarbonate and extracted with ethyl acetate. The extract was dried over magnesium sulfate and evaporated in vacuo. The residue was chromatographed on silica gel using chloroform. The fractions containing the desired compound were combined and evaporated in vacuo to give a residue, which was recrystallized from ethyl acetate to afford 3,4-dihydro-6-(3,4-dimethoxyphenyl)-3-methyl-4-(2,4,6-trimethylphenylimino)pyrimidine (0.36 g).

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