Preparation of 2-cyano-4-nitro-6-bromoaniline_Kain Industrial Additive

background and overview[1] 2-cyano-4-nitro-6-bromoaniline is a very important disperse dye intermediate and an important raw material for the synthesis of disperse dyes such as disperse blue 183. preparation[1] (1) synthesis of 2-cyano-4-nitroaniline: a1. put 100g o-chlorobenzonitrile into 333g sulfuric acid medium, then add mixed acid dropwise, and perform nitrification at 5-10°c to obtain nitrate; the…