Process of Sulfonating 4-Aminobenzonitriles
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United States of America Patent
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Issued Date -
Sep 18, 2008
app pub date -
Jul 20, 2006
filing date -
Jul 20, 2005
priority date (Note) -
Abandoned
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Abstract
A process of producing a compound of the following formula (3): wherein R.sup.1 is a C.sub.1-5 alkyl group, R.sup.2 is a halogen atom, a C.sub.1-5 alkyl group, a C.sub.2-5 alkenyl group, a C.sub.2-5 alkynyl group, a C.sub.1-5 alkyl group, a C.sub.1-5 alkoxy group, a nitro group, or a hydroxy group, wherein multiple R.sup.2 may be the same or may be different, and a is an integer of from 0 to 4,comprising reacting a compound of the following formula (2): wherein R.sup.2 and a are as defined above with a C.sub.1-5-alkanesulfonyl chloride or C.sub.1-5-alkanesulfonic acid anhydride followed by hydrolyzing an N,N-disulfonated derivative of compound (3) to the compound of formula (3).
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