Method for preparing halomethyl heterocyclic compounds
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United States of America Patent
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Dec 10, 2002
Grant Date -
N/A
app pub date -
Jul 19, 2001
filing date -
Jul 19, 2001
priority date (Note) -
Expired
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Abstract
The present invention relates to a method for preparing 5- and 6-halomethyl quinoxalines. The method comprises contacting a 5- or 6-methyl quinoxaline with a halogenating agent in the presence of a radical initiator in a solvent selected from the group consisting of fluorobenzene, difluorobenzenes, trifluorobenzenes, chlorobenzene, dichlorobenzenes, trichlorobenzenes, .alpha., .alpha., .alpha.-trifluorotoluene and .alpha., .alpha., .alpha.-trichlorotoluene. The method for halogenating benzylic methyl groups may also be employed to halogenate a wide variety of halomethyl heterocyclic compounds.
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