| 摘要 |
The invention discloses novel 2-alkyl-5-alkylsulfonyl-4,6-dihalopyrimidines of the formula I <IMAGE> (I) wherein each of R1 and R2 independently is straight chain or branched chain C1-C5alkyl, and each of Y and Y1 is chlorine, fluorine or bromine. The compounds of the formula (I) can be obtained e.g. by reacting a 2-alkyl-4,6-dihydroxypyrimidine, in the presence of a chlorinating, brominating and/or fluorinating agent, with a dialkyl sulfoxide, and then oxidizing the compound obtained. The compounds of the formula (I) are valuable intermediates which are suitable e.g. for the manufacture of reactive dyes.
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