Preparation of 4-(4-fluorophenyl)-6-isopropyl-2-(N-methyl-N-methylsulfonyl amido) pyrimidine-5-formaldehyde

The invention provides a method for preparing a Rosuvastatin intermediate, 4-Fluorophenyl-6-isopropyl-2-(N-methyl-N-methylsulfonyl amino) pyrimidinyl-5-formyl. The method uses isobutyryl acetonitrile, 4-Fluorobenzaldehyde and carbamide as raw materials and is obtained by steps of cyclization, oxidation, substitution and reduction etc. The method of the invention dose not need expensive raw materials and has the advantages of low technological cost, simple reaction, high product yield and being applicable to industrialized production.