Process for preparing 2-alkyl-5-haloacetylbenzenesulfonamide.

摘要

Process for preparing 2-alkyl-5-haloacetylbenzene-sulfonamide represented by the general formula (1),
<Chemistry id="chema01" num="0001"><Image id="ia01" he="30" wi="56" file="IMGA0001.TIF" imgContent="chem" imgFormat="TIFF" inline="no" /></Chemistry>(wherein R' is an alkyl group having 1 to 5 carbon atoms; and X is a chlorine atom, bromine atom or iodine atom), characterized by halogenating a 5-acetyl-2-alkylbenzenesul- fonamide represented by the general formula (2),
<Chemistry id="chema02" num="0002"><Image id="ia02" he="31" wi="57" file="IMGA0002.TIF" imgContent="chem" imgFormat="TIFF" inline="no" /></Chemistry>(wherein R' is the same as defined above) in a lower alcohol represented by the general formula (3),
<Chemistry id="chema03" num="0003"><Image id="ia03" he="6" wi="21" file="IMGA0003.TIF" imgContent="chem" imgFormat="TIFF" inline="no" /></Chemistry>(wherein R<Sup>4</Sup> is an alkyl group having 1 to 5 carbon atoms).