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

関与物質

反応手順

To 3,4-dihydro-6-(3,4-dimethoxyphenyl)-3-methyl-4-(2,4,6-trimethylphenylimino)-2-(1H)pyrimidone (5.0 g) was added phosphorus oxychloride (50 ml). The mixture was refluxed for 7 hours and evaporated under reduced pressure. The resulting syrup was triturated in a mixture of ice and water, neutralized with aqueous sodium bicarbonate and extracted with chloroform. The extract was dried and evaporated under reduced pressure. The residue was chromatographed on silica gel using chloroform to give 2-chloro-3,4-dihydro-6-(3,4-dimethoxyphenyl)-3-methyl-4-(2,4,6-trimethylphenylimino)pyrimidine (3.26 g).

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