PROCESS OF SULFONATING 4-AMINOBENZONITRILES

摘要

A process of producing a compound of formula (3), wherein R¹ is a C_1-5 alkyl group, R² is a halogen atom, a C_1-5 alkyl group, a C_2-5 alkenyl group, a C_2-5 alkynyl group, a C_1-5 alkyl group, a C_1-5 alkoxy group, a nitro group, or a hydroxy group, wherein multiple R² may be the same or may be different, and a is an integer of from 0 to 4, comprising reacting a compound of formula (2), wherein R² and a are as defined above with a C_1-5-alkanesulfonyl chloride or C_1-5-alkanesulfonic acid anhydride followed by hydrolyzing an N,N-disulfonated derivative of compound (3) to the compound of formula (3).