Process for the preparation of 2-halogenopyridinealdehydes and novel 2-halogenopyridinealdehydes
The reaction of cyanoolefins, aminocarbonylolefins or hydroxyiminoolefins with a Vilsmeier reagent leads to 2-halogenopyridines which bear aldehyde groups in the 3 and/or 5 position. These pyridinealdehydes are valuable intermediates for the preparation of pharmaceuticals and crop protection agents.
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(2008/06/13)
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