Synthesis of 2-substituted-5-methyl-pyridines and...

Details Synthesis of 2-substituted-5-methyl-pyridines and... Synthesis of 2-substituted-5-methyl-pyridines and...

C - Chemistry, Metallurgy

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C07D 213/61 (2006.01) C07D 211/86 (2006.01) C07D 213/64 (2006.01) C07D 295/03 (2006.01) C07D 295/155 (2006.01)

Patent

CA 1300160

ICI-Am 1593-B Abstract A prices for the synthesis of compounds which are known intermediates for the pyridyloxyphenoxy herbicides as well as intermediates used in the process. Propionaldehyde and an acrylic compound, two readily available starting materials, are reacted to form a 2-formylpentanoic compound which is cyclized to a dihydro pyridone which is then oxidized to the 2-hydroxy pyridine. The hydroxypyridine may be halogenated to a 2 -halopyridine.

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